bs 10

BRITISH STANDARD 621.643.412:621.882

SPECIFICATION FOR

FLANGES BOLTING PIPES, VALVES FITTINGS

BRITISH STANDARDS INSTITUTION Copyright Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

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BSalO

1 b 2 4 b b 70 70 1 3 8 8 0 7

SPECIFICATIONFO SPECIFICATIONFO

FLANGES AN

BOLTING

PIPES, VALVES FITTINGS

B.S.

1962

Incorporating amendments issued J a n u a r y 1 9 6 5 ( P D 5 4 1 3 ) , A p r i l 1 9 6 6 ( P D 58231, November 1966 (PD 5949) and September 1970 (AMD 5 8 5 )

Obsolescence In view of t h e c h a n g e t o t h e m e t r i c s y s t e m i n t h eU.K., B.S.

should now be regarded as obsolescent. It will be made obsolete in due course.

BRIT€SHTANDARDS BRIT€SHTANDARDSNSTITUTION Incorporated by Royal Charter 2 PARK STREET, STR EET, ONDON,

IA

elephone: 66933Telex:

Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

-629 9OOO Not for Resale

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B.S.

19S2

TIUS BIUTISHSTANDARD,aving aving been approved by the

Mechanical, Engineqing Industry Standards Committee and endorsed by the Chairman of the EngineeringDivisional EngineeringDivisional Council, was published under the authority the General p u n c l l on 17th w$.xf,962. The Institution desires to call attention to the,fact that this British StAndard does not purpón tó.include all the necessary provisions of contract. In order- to keep abrëast .of .o f progress progress in the industries

concerned, concerned, British Standard Stan dardss are subject subj ect to periodical revi review ew Suggestions for improvements will recorded and in due course brought to the notice of the committees charged with the revision of the standards to which they refer. complete list of British Standard Stan dards, s, numbering over 5000, indexed and cross-indexed for reference, ogetherwith ogether with an abstract abst ract of each each standar sta ndard, d, will will be found found in the Institution’s Institution ’s Yearbook. This standard stan dard makeseference the followingBritish Standards: BS.18. Methods for tensile testing testing of metals. B.S. 21. Pipe threads. B.S. 78. Cast iron spigot and socket socke t pipes(verticallycast) and spigot and socket fittings: Part 1. Pipes. B.S. 84. Parallel screw threads of Whitworth form. B.S. 309. Whiteheart.malleable.. Whiteheart.malleable..iron castings. R.S. 310. Blackheart Blackheart malleable iron castings, BIS. 350.. Conversion factors and tables. B.S. 806. ‘Feirous pipes and piping nstallations for and in connection with land boilers. B.S. 916. Black Black bolts, bolt s, screws and nuts B.S. 970. Wrought steels in th form of bars,billets, and forgings, up to n ruling section, automobile and general engineering purposes. En eries. B.S. 1083. Precision hexagon bolts, screws and nuts. Centrifugal ly cast (spun) iron pressure pipes for B.S. 1211. Centrifugally water, gas and sewage. &r+ik,’ B.S. 1306: Non-ferrous’pip& Non-ferrous ’pip& ánd’tubes ánd’tub es for st Part 2. Seamless copper for for steam s team services services ` , , ` , ` , , ` , , ` ` ` ` , ` -

S ‘ . ,


Not for Resale

.

BS*10

3624667 0138807 B.S.

B.S. 1400. Schedule of copper alloy ingots and copper and copper alloy castings. B.S. Grey iron castings. B.S. Steels for us in the chemical, petroleum and allied industries. B.S. 1580. Unified screw threads.Farts and 2. Diameters in and larger. B.S. 1633. Steel for land boilers, receivers and other pressure vessels. 1723. Brazing. R.S. 1724. Bronze welding by gas. Unified precision hexagon bolts, screws and nuts B.S. (UNC and U F threads)"normal series. B.S. 1769. Unifiedblackhexagonbolts,screws and. nuts (UNC and UNF threadsbheavy series. B.S. Cast iron flanged pipes and flanged fittings. B.S. 2060. Copper alloy globevalves for general purposes. B.S. 2708. Unified black square and hexagon bolts, screws and nuts (UNC and UNF threads)-normal series. B.S. 2789. Iron castings with spheroidal or nodular graphite. B.S. Precise conversion f inch and metric sizes on engineering drawings. B.S. 3100. Steel castingsfor general engineering purposes. B.S. 3410. Metal washers for general engineering purposes. B.S. 3601. Steel pipes nd tubes fo pressure purposes: carbon steel: ordinary duties. B.S. 3602. Steel pipes nd tubes for pressure purposes: carbon steel: high duties. B.S. 3604. Steel pipes and tubes for pressure purposes: low and medium alloy. ` , ` ` ` ` , , ` , , ` , ` , , ` -

Th following B.S.I. references relate to the work on his standard

Commi ee re er nces ME E/ ll, EE /ll /l, Draft comment A(MEE)lSl.


EE /ll /l/l /l an MEE/I1/2.

Not for Resale

62

BS8KLO B.S.

1 b 2 4 b b 9 0138810

1962 CO-OPERATING ORGANIZATIONS

` , ` ` ` ` , , ` , , ` , ` , , ` -

The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departmen ts and scientific an d industrial org anizations: *Admiralty Air Ministry *Associated-OflicesTechnical Comm itfee *Association Consulting Engineers (Incorporated) Association ining E lectrica Mechanical Engineers British Chem ical Plant Man ufacturers'. Association British Compressed Ai Society 'British Electrical and Allied anufacturers' Associatio British Engineers' A ssociation British Gear Manufacturers' Association British Internal Combustion Engine Manufacturers' Association *British Iron and Steel-Federation British Railways, Th e British Transpo rt Comm ission Crown Agents for Oversea Governments and Adm inistrations *D.S.I.R.-National Eng ineering Lab oratory *Electricity Council, the G enerating B oard a d the Area Boards in England and Wales *Eng ineering Equipm ent Users' A ssociation Ga s Counci High C omm ission of India Institute of Marine Engineers Institute Petroleum *Institution of C ivil Engineers 'Institution Gas Engineers Institution of Heating and Ventilating Engineers *Institution of Mechanical Engineers Institution Mechanical Engineers (Automobile Division) Institution of Production Engineers Locomotive and Allied Manufacturers' Association Great Britain Machine Tool Trades Association Ministry Labour (Factory Inspectorate) Ministry Power Ministry Public Buildings and Works *Ministry of Transport National Coal Board *National Physical Laboratory (D.S.I.R.) Radio Industry Council ar Omce The Government depaflments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the Committee entrusted with the preparation this standard: British Bolt. ut, Screw and Rivet Federation British Valve Manufacturers' Association Copp er Development Association Institute Welding Lloyd's Register of Shipping National Association of Drop Forgers and Stampers North East Coast Institution of E ngineers and Shipbuilders Oil Companies.Materials Association Water-tubc Boilermakers' Association Individual Manufacturers


Not for Resale

BS

Lb246b7 0 1 3 B B L l

BSOlO

B.S. 10

CONTENTS Page Cosperating organization Foreword SPECIFICATION 1.

scope

Design temperature and pressure Designation 4. Flange dimensions 5. Flange materials Bolts and nuts 7. Attachment of flanges Hydraulic testing flange joints 9. Low temperature flanges and bolting 2.

10

10 10 11 13 14 15

TABLFB

nges

16 Application bolts and stud-bolts 2. Materials, dimensions nd finish of bolts, stud-bolts nd nuts 16 for car3. Temperature-pressure atings langes bon steel 18 4. Temperaturepressure ratings for alloy steel 18 5. Temperaturepressure ratings for grey cast iron and malleable cast iron flanges 20 Temperaturepressure ratings for 22 langes lloy copper 24 aterials-steel Flange Bolting-steel 25 Dimensions of plain, boss, integrally cast 26 langes or forged 30 34

Dimensions plain, boss, integrally cast or forged and welding neck flanges 42

Dimensions of plain, integrally cast forged,nd weldingeck langes

--`,``-`-`,,`,,`,`,,`---


Not for Resale

46 48

50 52

96

B,S. 10 1962 HGURES

` , ` ` ` ` , , ` , , ` , ` , , ` -

lange nly.

Page 54 Shapxl stud-bolt Application diagram for bolts and stud55 langes bolts. teel arbon 2b. Application diagram fo bolts and studlanges teellloy bolts. 56 3. Steel copperlloylainlange 57 oss4. Steel 5. Integrally forged cast steel flange for valves 58 Steel welding neck flange (Tables to T) 59 7. Integrally castiron flanges (Tables and H) 60 APPENDIX

Information to be supplied y the purchaser

Copyright British Standards Institution Provided by IHS under license with BSI

B.S.

BRITISH STANDARD SPECIFICATION FO

BOLTING PIPES, FITTINGS VALVES

FLANGES

FOREWORD This revised standard has been prepared under the authority f the Mechanical Engineering Industry Standards Committee and supersedes B.S. Part 1, 1947; B.S. 10, Part 1926; B.S. 10, Part 3, 1929; B.S. 10, Part 4, 1931 and B.S. 10, Part 5i 1932. The number of tables has been reduced by the omission of Tables B, and P included in the previous edition. The increase in pressure ratings at lower temperatures for Tables and has made Tables and redunciant; Tables and have found little application. Additions have been made to the standard to conform to the requirements of current practice. The size ranges for Tables D, E, K, and have been extended,Thicknesses for cast iron flangeshavebeenadded to Table Dimensional requirements for steelboss ypeflangeshavebeen ncluded Tables A, D, E, F, and J. Dimensions for welding neck flanges have also been included for all tables except Tabl Some the sizes of flanges specified in the previous edition of B.S. have been deleted and other sizes have been introduced in this revised standard. The dimensions of flanges to Tabl Sizes 54 in, 60 in, in, and 72 in, have been completely revised to meet the requirements of the principal users. Pressure ratings for each table of flangeshave beencalculated to enabl (-17*0""C) values to bescheduled for a number of temperatures, from B.S. 10, 1932. upwards, superseding the ratings given in Clause 8, Part Pressure ratings for flanges of carbon steel and cast iron have been increased at the lower temperatures; for flanges copper alloy the temperature-p-essure ratings are based on B.S. 20M* and flange thicknesses for certain sizes have been reduced agreement with urrent practice. The pressures referred in this standard are gauge pressures. should be noted that, apart from cast iron flanges, the hydraulic teat pressure applied to flange joint is limited to one-and-a-half f i m s the highest rated pressure the flange (see Clause 8). Flange materials for all tables are now specified and this standard has been extended to cover flanges certain alloy steels. B.S. 2060.

Copper alloy globe valves for general purposes --`,``-`-`,,`,,`,`,,`---


Not for Resale

96

B.S.

1962

Review tables. B.S. flanges have been in use since 1904 and have been developed continuously to meet increasing pressure and temperature requirements, the time of this revision, flange joints with carbo steel pipe flanges for high temperatures and pressures to the British Standard tables have been i s e r v i c e throughout the world for periods equal to the economic life of primary plant. The trend towards the use of ever higher temperatures in thermal cycles, together with the need to conserve resources, necessitated a revision of design theory.Research into the designofflange joints under the auspices the Institution of Mechanical Engineersmade possible to calculate the effects ofhigh temperatures. The results of thisresearchhave been applied in this revision B.S. Experiencehas ndicated that where temperatures 800°F (427OC) and higher have to withstood, an estimate the effect of creep becomes essential that the condition of a joint t any given time, after initial tightening, can be predicted. This has been made possible y methods of analysis developed fo application to the British Standard typeofflange, and examinatio of the resulting proportions of these flanges has shown hat a complete rationalization f the tables can be obtained by an increase in the thickness of the flange in certain sizes. Apart from Table sizes 54 to inch, the other basic dimensions ¡.e., the Hange diameter, bolt circle diameter and the number and size the bolts have not been altered except n the case of Tabl where the bolt diameter has been increased from inch to nch for the 24 inch size flange. The type of steel flange for which calculations have been made is essentially flat annular ring, homogeneous with the pipe, having raised jointing face of prescribed diameter and with the gasket substantially covering the full area of the jointing face.The hicknessesofboss and weldingneckflanges and integral flanges cast or forged on valves, havenot et been evaluated theoretically. As an interim measure the thicknesses boss and welding neck flanges are the same as for plain flanges and the existing thicknesses of integral flanges on valves, which have been used for many years, are given in the tables.

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Development analysis. It has been established that the critical stress steel plain flange is he circumferential stress. calculating the external loads on the flange allowancehas been made for the effect of the adjacent pipe which is usually subjected o plastic deformation, At emperatures where no creepoccurselastic conditions prevail n the flange plate throughout the lifetime the joint and the elastic theory hasbeen used for these conditions, Where temperatures are such as to produce creep arld consequently plastic conditions in all parts of the joint the initial stresses relaxnd the stress distribution is changing throughout its lifetime. this 'case the criterion for tightness of the joint has to satisfied under initial tightening conditions (cold), under operating conditions at the end of it life ód atall intermediate times. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

B.S.

962

solve completely the problems set by these requirements, the relaxed known. For stresses in the component parts of the joint in service should carbon steel these stresses were obtained from tests on in bore-able been derivedfromexistingdesignswhich flanges; for alloysteel heyhave have been proved to reliable in service over manyyears. far as present knowledge of creep and relaxation properties allows, the temperatura applicable at correspondingpressures Temperatwe-pressure applicability) for steel flanges have been ascertained on the basis of ensuring O00 hours of continuous service under stable tight joint for a period of conditions without retightening. NOTE 1. When metric equivalents of the pipe dimensions in this stand ard are required, reference should be made to the corresponding values in recommendations R64* R65t as appropriate. When it is required to convert the figures in this standard from British units into meiric units it is recommended that the conversion factors an d the table of conversion contained in B.S. 350, Conversion factors and tables be used. Attention -is drawn to B.S. 2856. Precise conversion of inch a nd metric size on engineering drawings NOTE 2. In place the customary, but incorrect, use of the pound as unit of force, the unit called pound-force (abbreviation lbf) has been used in this stand ard. This is the force which, when acting on body of mass one pound, gives it an acceleration equal to that standard gravify. e unit called ton-force (abbreviation tonf) has also been used where appropriate.

SPECTFICATION SCOPE

1. This standard provides for a series of carbon steel, alloy steel, cast iron and

copper alloy flanges, and also appropriate bolts and nuts, for use with pipes, valves and fittings containing steam, oil, compressed air water within the following ranges of temperature and pressure: 328°F 2 0 ° C ) up to and including 975°F 524°C) $e,,d Temperature: to Clause 9). (for ow temperature applications efer Pressure: Up to and ncluding 2800 lbf/ina. The useofflangescomplyingwiththis standard for temperaturesbelow 0°F (--174°C) shall be agreed between purchaser and manufacturer. These flanges may also be used on pipes, valves and fittings carrying other fluids orwhich the same requirements for safetyand joint tightness are appropriate. The applicabilityrelationshipbetween temperatureand pressure for the above materials is specified for each table of flanges in Tables 4, and The types ofgasket, and gasket materials, and the surface finish of h0 jointing face are matters for agreement between the purchaser and the manufacturer. When a raised jointing face specifled the outside diameter f the gasket should extend at least to the outside diameter of the raised face. For steel flanges when a raised jointing face is not specified, the gasket should be within the bolt holes. R64, Steel tubes: outside diameters R65, Steal fubes suitable for screwing in accordance with Recommendation --`,``-`-`,,`,,`,`,,`---


Not for Resale

B.S.

1962 DESIGN TEMPERATURE

PRESSURE

The design temperature and pressure shall be stated by the purchaser except where the flange table is specified. Where there is an appropriate application standard it the responsibility of the purchaser to ensure that the design temperature and pressure tated comply with the requirements of that standard The temperature-pressure ratings given in Tables to inclusive are design ternpmttzes and pressures. The pressure ratings, with the exceptionf those in the second column in Table are applicable to installations subject o moderate shock such as mayoccurin an efficientlydesignedandoperatedboilerfeed main. Where system may be subject to more severe shock, it is the responsibility the purchaser to make a suitable allowance when stating the desig pressure or the flange table. DESZGNATION

3. The flange sizes shall

designated by the nominal bores of their respective pipes as given in the first and last column of each table. PLANCE D I M E N S I O N S

4. The dimensions f the flanges o this standard shall conform o those specified in the appropriate tables and Figs 3,4, ,6 and 7. The hicknesses and diameters flangesspecified in this standard are minima except that the thickness of cast iron flanges pipes and fittings to (0-05T 0.03) n. shall be subject to limits of B.S. 2035* and B.S, 78, part lPdi

Raised ointing fac es steelflanges only. (see Figs. 3, 4, and 6). (i) Tables Raised jointing faces are not specified because an it is not customary to use them on these flanges, a raised jointing face is required on a steel flange, the diameter shall be in less than the diameter of the inscribed circle touching the bolt holes,

(ii) Tables Raised jointing faces are specified in these tables und and are recommended only steel flanges. (iii) Tables shall be used.

und

Raised jointing faces as specified in these tables

b, Flange thicknesses. (Figs. 3,4,

and'7). The thickness specified in the tables includes a raised jointing face having a heightno exceeding in.Where here is no raisedface, is he thickness the flange. the height of the raised jointing face s more than in, the thickness T) shall increased by an equivalent amount. B.S. 2035, Cast iron Ranged pipes and flanged ittings Cast iron spigot and socket pipa (vertically cast) and spigot and socket fittings B.S. Part Pipes *. --`,``-`-`,,`,,`,`,,`---


Not for Resale

BSm1O h2

1b24bb9 0138817 B.S.

96

The backs of integrally cast steel flangcs shall be machined. This machining either by spot-facing at the bolt holes y back-facing at the optio the manufacturer (see Fig. The backs of other flanges ma be left unmachined at the option of the manufacturer unless otherwise specified by th purchaser. Aftermachining, the thicknessof the flange shall not less than the thickness specified. c. Flange drilling. Unless otherwise specified by the purchaser bolt holes shall be drilled, shall equally spaced on the bolt pitch circle diameter, and in the case ntegral flanges the bolt holes shall be drilled centres. inch and inch bolts, the diameters of the holes shall be %e inch larger than the diameters of th b o l t s , except that for cast iron flanges with inch b o l t s the holes may inch larger than the diameters of the bolts. For inch bolts and larger, the diameter of the holes shall not more than inch larger than the diameters of the bolts in all cases. PLANGE MATERIAIS

5. Flanges shall made of the following materials, as appropriate: (i) Steel flanges either forged, stamped or plate hall be made of materials $ired complying with the minimum requirements of the following, Alternative r. materials may be used providing that themechanical properties at operating ldkd temperature are not inferior to those given in the specifications referred to below. TEMPERATURE 0°F to 750°F inc. 7.8"C 399°C inc.over

inclusive inclusive

B.S.1501-151 B.S.503-161

Grade Grade

B.S. 1501-151 Grade 26A*

Grade

00'F inc. 750°F to 9 399°C to 482°C inc. B.S.1501-151 B.S.503-161

Grade 23B*

B.S.1501-151

Grade Grade

Grade

) Steel of the following minimum requirements ay used for ff anges in Tables to inclusive for temperatures from 17.8"C) to 500°F (260°C). Carbon ent aximum Analysis: 0.26 per Sulphur maximum 0.06 perent Phosphorus 0.06 per cent maximum B.S. 1591, Steels for fired and unfired pressure vessels. Plates B.S. 1503. Steels or use in the chemical, petroleum and allied industries. Forgihgs ',

11 Copyright British Standards Institution Provided by IHS under license with BSI

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l b 2 4 b b 9 0338838

BSmLO B,S.

96 Tensile strength:

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tonf/in* m i n i m u m .

Elongation: Percentage elongation on gauge length

than

5-651/S0no less divided by the tensile strength (tonf/ins) the test piece.

carbon steel to B.S. 592"Grade A, in B.S. 3100* 161, Grade .t c, F ~ r g darbon-molybdenum steel to B.S. 1503-240, Grade d, Cast carbon-molybdenum stee B.S. 1398 in B.S. 3100* B. Cast

Mt.

B.S. 1504-

B.S. 1504-

e. Forged chromium molybdenum steel'to B.S. 1503-620t or B.S. 3604$,

$e,ed

1%

Cast chromium molybdenum stee to BS. 504621t. Grey cast ironhavingmechanicalproperties at leastequivalent Table 5): following

the

TEMPERATURF4

to 25

to

to 43

.8 to 190.6

.8 to

TABLE

.8 to 121.1

A, an

B.S. 1452, Grade B.S. 2035

B.S. 1452, Grade 125

B.S. 1452, Grade 149 _.

an

B.S. 1452, Grade 12

3.S. 1452, Grade 128

B.S. 1452, Grade 149

B.S. 3100, Steel castings for general engineering purposes B.S. 1501-6. Steels fo use in the chemical, petroleum and allied industries B.S. 3604. Steel pipes for pressura purposes-low an medium alloy B.S. 1452, Grey iron castings II B.S. 2035, Cast iron Banged pipes an flanged fittings'.

*.


12 Not for Resale

B.S. Malleable cast iron to B.S. 3W* B.S. 3101. Copper alloys having mechanical properties a t least equivalent t 1400-LG3-C#. B.S. 1400-LG24, or spijìed

1962

those

NOTE. Other gradesof alloy steels,cast iron and copper alloys having aupcrior propertim areavailable fo which.the temperature-pressureratingshavo not yetbeen evaluated. Spheroidal nodular cast iron t B.S. 27896 ma be used at temperatures not exceeding 650'F (343.3"C)

Flanges shall free from laminations andurface defects. Where welding neck flangesre made from wrought steel he direction of th fibres of the material in the neck shall be parallel to the longitudina axis of the flange. If the purchaser requires certifkates of the process, chemical analysis of the specified-elements and physical properties of the materials, this shall be stated on th5 order. When the purchaser requires the individual flange he ordered to bc marked to identify the materials used, the system of marking t be employed shall the subject of agreement between the purchaser and the manufacturer. BOLTS

NUTS

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6. a. Application. Bolts, stud-bolts and nuts shall comply with the minimum requirements, corresponding o the various flange tables nd temperature imits specified in Table b. Dimensions, finish and materials. Hexagon headed bolts withhexago nuts or stud-bolts withhexagon nuts shall be used, the dimensions and finish which shall comply with he requirements of Table 2. The materials -p ecified in Table are typical and materials to other specifìcations, having similar

superior properti&, may be used by agreement between the purchaser and the manufacturer. Free cutting steel shall no used for design temperaturesexceeding 450°F (2322°C). For design temperatu& up to and including 500°F (260°C) steels for bolts, stud-bolts and nuts shall contain not more than 0.060 per cent sulphur or phosphorus and for design temperatures over 500°F (260°C) shall contain not more than 0.050 per cent of sulphur or hosphorus. The minimum yield stresses specified for alloy steels apply to the material ficcred in the hardened andondition. tempered 1965 Alloysteels shall have creep relaxation properties and impact properties adequate for the design temperature andshall be agreed between the purchaser and the manufacturer.

*. Blackheart malleable iron castings

B.S. 309, Whiteheart malleable iron castings

B.S. 310, B.S. 1400, Schedule copper alloy ingots and copper and copper alloy castings B.S. 2789. ro castings with spheroidal nodular graphite

13 Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

BS*LO B.S.

Lb24669 O L 3 B 8 2 0

96 Nuts. Nuts may be made from steel to the same specification as that used for the bolts stud-bolts to which they are fitted but, for design temperatures over 550°F 287-8"C), is recommended that nuts should be made from material having a lower tensile strength than that for the bolts, provided that it is suitable for the design temperature.

alterad

!fi$

5'#u&bolts. Stud-bolts for designemperaturesnot xceeding (399°C) shall and plain in centre. (i) screwedacnd or (ii) screwed uel ngth, For design emperaturesabove (482'C) stud-bolts shall

750°F

750°F (399°C) and not exceeding 900°F

(iii) screwed each end and shaped in accordance with Fig. (iv) screwed full length. For design temperatures above900°F (482'C): (v) screwed each end and shaped in accordance with Fig, 1. of steel and shall e. Washers. Washers, where used, shall (i) For bolts or stud-boltsreferences I, II or III (see Table 2)-to B.S. 3410'. (ii) For bolts or stud-bolts references or VI (see Table B.S. 3410, Part except that for design temperatura above 900°F 3A or unless (482"C), thesteelshall be to B.S. 970 En2E otherwise agreed between purchaser and manufacturer. The us of washers may necessitatehe partial removal of the radius or fillet at the back of the flange by spot-facing back-facing. Washers shall no fitted where this would resultin the removal the radius or fillet to extent greater than that indicated in Fig. for integrally cast or forged steel flanges. VI inclusive (see Table it desirable mark the nuts, bolts used. an the system of marking to be employed should bethesubject of agreementbetweenthe purchaser and the manufacturer. NOTE, or references II

A T F A C H M E N T OP PLANGES

and u. The method of Securing flanges (other than integral flanges) to fittingssuppliedcomplete by manufacturers shall be in accordance with tho appropriate application standard. Where thereis no appropriate application standard, the methods of attachment shall be th subject of agreement between B.S. 3410, Metal washers for general engineering purposes B.S. 970, Wrought ateek in the form f bars, billets and forgings, up for autom obile and general enginesring purposes. En eedea --`,``-`-`,,`,,`,`,,`---


Not for Resale

in ruling sectio n,

B.S. 10

1962

the purchaser and the manufacturer, but the methods shown in the following British Standards should be regarded as minimum requirements: B.S. 806. s and piping installations for and in connection with land boilers. B.S. 1306. Part 1. Non-ferrouspipes and piping installations for and in connection with land boilers. b. flanges are tobe supplied loose, they shall, unless otherwisepeci6cally called for y the purchaser, be prepared for attachment to pipes follows: Steel flanges:

(i) Boss flanges, sizes and smaller -screwed in accordance with B.S. 21, Pipe threads 12 in machined in the bore slip over the (ii) Boss flanges, sizes

(iii) Plain flanges in thick and thicker machined in thebore; suitable for welding-on o form one of th types in the appropriate application standard as required by the purchaser. purchaser shall specify the type of preparation required (iv) Welding neck flanges machined in the bore to a diameter to specified by the purchaser, and suitably bevelledfor welding to pipe or fittings. Copper atloyflanges Machined in the bore to slip over the outside diameter of the pipe r fitting; suitable for fusion welding (where applicable), bronze welding t B.S. 1724* or brazing to B.S. 1723.t HYDRAULIC TESI'ING

H A N G E JOINTS

This standard does not specify the hydraulic test pressures for flanged pipes be obtainedfrom the appropriat or components,details ofwhichshould standards which specify test pressures for pipes or components but in an the test pressure be applied o the joint shall not & one-and-a-half times the highest rated pressures for steel and copper alloy flanges, and twice the highest rated pressures for cast iron flanges. Where flanged assemblies are not covered by any standard specifying test pressures but incorporate flanges complying with this standard, or where any assembly is to used for duties of a special nature, the test pressure shall be agreed between the purchaser and the manufaoturer.

B.S. 1724, B r o m welding by B.S. 1723, Braring 'e


Not for Resale

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B.S.

962

--`,``-`-`,,`,,`,`,,`---


16 Not for Resale

B.S.

n-

82

--`,``-`-`,,`,,`,`,,`---


5,

Not for Resale

17

1962

BS

lb24bb7 0138824

BSXLO 1962

TABLE

TEMPERATURE,- PRESSURE RATING! (See Clause; TEMPE1

T4IBu.c

PRESSURE ` , ` ` ` ` , , ` , , ` , ` , , ` -

95

10

80

17 25

500 70

46

23 39 55

60

650

70 94 41 2200 ~~

ntermedialte values' above (232.2'C) may ho obtained by n: temperaturesabove 2SO'F (121.loC)-up *This rating applies (232.2"C) and does not apply to flange above 36

TABLE

70 14

13

21 35 500

32 45

64 85 1 28 2000

77 1 15 1800

intcrp ation. and hcluding 450°F

TEMPERATURE PRESSURE RATINGI (See Clauses 5c TEMPE

TABLE OC

17.8 to 232.2

500 70

1200 1800 2800

260.0

1

65

66 85

80

1135 1700 2645

1065 1600 2490

41 585 75

3 9 0 3 6 0 3 3 5 3 0 5 5 4 5 5 0 5 4 6 5 4 3 0 65 .700 60 50

loo0 1500 2335

9 3 5 8 6 5 8 0 0 7 3 5

Intermediate valuor maybe obtained by Unear interpolation. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

371.1 PRESSURE

44 62

47

343.3

287.8 15.6

Not for Resale

18

1400 300 20100 2180 020

1865

1710

B.S. ia an

CARBON STEEL FLANGES

6)

80

82

TABLE

44

39 Jbf/in')

75 15

55 11 70

39 52 80 1210

685

lau,

1600

15 21

18

285

` , ` ` ` ` , , ` , , ` , ` , , ` -

pressures not exceeding to compressed au

325 43 65 1025

83

11 16

45 75 1050

27 41 64

1350 1800 70 4200

Industry to limit the use of Table recommended that this lbf/in'. I

FOR ALLOY STEEL F L A N G E S 5d, 5e an RATURE 85

875

975

92

496

510

52

hydraulic test

(lbf/in') (lbf/in') 26

37 75

35 45

465

63 95

1480

95 70 350

70

1400


14 19 24 49 77

Not for Resale

80

11 45 95 45

1350 1800 700 4200

TABLE

1962

B.S.

1962

TABLE

altered

1963

TEMPERATURE PRESSURE RATINGS MALLEABLECAST RONFLANGES GREY CAST IRON (See Subclauses 5g an TEMPERATURE Oto250

to 30

to350

Oto430

Maximum TABLE

-17.8 to 121*1

17.8 to 48.9

17.8 to 76.7

-17.8 to

17.8 190.6

hydraulic test

pressure

(Ibf/in*)

PRESSURE (Ibf/in*)

Boiler feed pipe installations, etc.

Steam 00

` , ` ` ` ` , , ` , , ` , ` , , ` -

20

100%

00 3005 ~~~

B.S. 806; limits t he s

feed pipes t 200 bf/in)*

of C.I.

190tt

lo00

In sizes 27 to 48 n inclusive, it is recomm ended tha for cast iron valves, Table flanges be specified instead of Table A. This rating does not apply to flange sizes abov 36 in. of B.S. 2035, iron flanged pipes and Flanges of material a3 defined in Clause flanged fittings' shall be used for these ratings only. These ratings do not apply to boiler feed pipe installation or other water pipes, valves and fittings subject to shock. It is customary th Ga Indus try to limit the use of Table flanges to working gaspressures not exceeding 30 lbf/in*. It is recommended that th is limitation be also applied to compressed air. B.S. 806, Ferro us pipes and piping installations or and inconnection with land boilers This rating applies only up to and including the 12 in flange size. A bove this size the pressure rating shall be reduced to 150 Ibf/ina. This the maximum pressure allowable for cast iron 430°F 221OC). Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without li cense from IHS

Not for Resale

BS*l,O

1 6 2 4 b b 90 1 3 8 8 2 7

1962

B.S.

TABLE a. TEMPERATURE-PRESSURE ATINGS* FO

COPPER N (INCLUS (INCLUSIVE IVE

ALLOY FLANGES SIZES (See Clause 51)

~~

TEMPERATURE I

Maximum hydraulic

"17.8 48.9 76.7 04.4 32.2 60.0 to 121.1

test

pressure (lbf/in3)

50 ~~

100

-Ï

00 50

33

75 25

Intermediate values values may be obtained by linear linear interpolation, except for Table Th e above ratings agree with those adopted in the revised edition of B.S. 2060, Copper alloy globe valves valves for gen eral purposes where applicable. Th e dimensio dimensions ns of Table nd up in size are identical. It is customary customary in the G as Industry to limit the use Table flanges to working gas pressures not exceeding Ibf/i Ibf/in*. n*. It is ecomm ended that this limitation limitation be also applied to compressed air. §This rating applies to temperatures above 250°F (121.1"C) up to and including 450'F (232.2OC).

--`,``-`-`,,`,,`,`,,`---

Previous page


22

BS

l b 2 4 b b 7 0138828

BS*LO

B.S. TABLE

TEMPERATUREPRESSURERATINGS FO TEMPERATUREPRESSURERATINGS

962

COPPER

ALLOY FLANGEB SIZES OVER (See Clause

50

50

to250

17.8 to 121.1

04.4 76.7 148.9

PRESSI.JRE-(lbf/ins) applying ver 24 in

32.2

260.0

the size range

Over

75 6 5 5 0 265

550 700

195

175

375

320

285250

60

39

82

525.

670

1050

615

Intermediate valuca may bo obtained by linear interpolation, interpolation, except fo Table A. It is customary in tho Ga Industry to limit the use. of Table flanges to working ga pressures no e x d i n g 30 Ibf/in*. It is d that that this this limit limitat atio io be also applied wmpressod air. temporaturw above 250.P (121-loC) up to and ncluding This rating applies (232.2%).


Not for Resale

` , , ` , ` , , ` , , ` ` ` ` , ` -

B.S.

962 EMPERATURE FLANGES

%eed

AN

BOLTING

9. This clause gives the minimum requirements for materials for flanges olting for low low temperature duty. Alternative Alternat ive materials materials may be used provided that tha t the mechanical propertiesat propertiesat operating temperature temperature re not inferior to thos given in the specifications referred to below. a. Steel Steel flanges flanges either either plate, plate, stamped, forged or cast and bolting material intended for use use with with pipes pipe s in accordance with .S 3603, Steel pipesand pipesand tubes Carbon and alloy steel: low emperature emperatu re duties ', Pressure fo pressure purposes.Carbon ratings for these low temperature flanges shall beas beas shown in Table 3, tempera174°C to 232°C). 450°F ture range TABLE

FLANGE MATERIALS-STEEL TEMPERATURE

Flange table

148°Fto

58°F inc.

over

100°C to

50°C inc.

over

22°F inc.

to

50°C

30°C

inclusive

Plates B.S, 1501-503 LTlOO*

Grade 26 LT50 Forgings B.S. 1503-503 LT100* B.S. 1503-161A Castings B.S. 1504-5035

inclusive

B.S. 1501 -224

LT50* B.S. 1504-161

Grade

Plates B.S. 1501-503 LTlOO*

over

to

over

0°C to 7'8°C hc

B.S. 1501-351

Grade

B.S. 1503-161

Grade

B.S. 1504-151

Grade

B.S. 1501-224 Grade 26 LT5O Forgings B.S. 1503-503 LTlOO* B.S. 3503-161B

Grade

Castings B.S. 1504-503t

B.S. 1504-161

LT50* B.S. 1504-161 Grade

B.S. 1501-161 B.S. 1503-161

Grade Grade

With B.S. 1510 supplementary requirements. Specifications fo castings subject impact tests are not yet available. availa ble. In the the meantim mea ntimee the impact testing testing f castings shall be the subject f special special agreement agreement between the purchaser and the manufacturer.

--`,``-`-`,,`,,`,`,,`---

BS

l b 2 4 b b 9 0138830

BSjKlO

B.S.

TABLE 8. BOLTING-STEBL Temperature

to

7*8"C 2°

to

to

BOLTS A N D N U T S

B.S. 1750*Part

22°F

STUD BOLTS

B.S. 1750*Part

58°F

to

B.S. 1769t Clause

B.S. 1506-621 Grade

NUTS

B.S. 3750* Part 2 Grade 58°F to

Materials

Typical grade of bolting and marklng synrbol

Design

STUD BOLTS

LT50

B.S. 1506-240

1506-621 Grade LTlOO

148°F B.S. 1750*Parf 100°C ~~

NUTS

B.S. 1750* Part Grade L4 B.S. 1506-240 LTlOO used for valves with integrally cast Unified heavy series nuts should no forged Range to Tables R, s space does not permit their use (see Fig. For such B.S. 1768, Table 2, should be used. applications no a1 series nuts to B.S. 2708, Table OTE 2. By agreement between the purchaser an d the manufacturer threads other thUnifìcd ay be used.

NOTE

Copper alloy flangeso this standard ma used temperatures dow 28°F (- 200°C). Pressure ratings for these flanges shall be as shown in 25O0F. per cent aluminium bronze Table 6a or temperature range to B.S. 2032 is a suitable bolting material for the above low temperature range, but other copper alloys may be used by agreement between the purchaser and the supplier.

B.S. 1750, Bolting for the petroleum industry .S. 1769, Unified black hexagon bolts, screws an d nu ts (UNC

aeries

--`,``-`-`,,`,,`,`,,`---


25

Not for Resale

threads) heavy

962

B,S.

1962

TABLE

Flange siz deti nation nom na1 bore 01 pipe)

Approximate ,utnide diamete steel

pipe'

of

Diameter

bolt#

or

B.oge

in

DIMENSIONS

PLAIN, BOS$

Diameter

boltst

in

8% 10

` , ` ` ` ` , , ` , , ` , ` , , ` -

20

Fo availability steel pipe sizes, refer o B.S. 3601, Steel pipes and tubes or pressure B.S. 3602, Steel pipes and tubes fo pressure purposes: carbon steel, ordinary duties purposes: carbon steel, high duties Se B.S. 78 Cast iron spigot and socket pipes (vertically 1211, Centrifugally cast (spun ) iron cas tland spig ot and socket fittings: Part 1. Pipes B.S. 2035, Cast iron flanged pipes an Banged pressure pipes for ka ter , gas and sewage fittings for outside diameters of cast iron pipes. See B.S. 1306: Part 2, Seamless copper tubes for steam services for the sizes of cop per pipes for use with cop per alloy flanges to in bore.


26 Not for Resale

Lh2qhb9 0 1 3 8 8 3 2

BS*WLO

B.S.

962

INTEGRALLY CAST OR FORGED FLANGES

Tables 3,

an

doas of bou (pis Diameter nt en of bou

ThteLneu

Enage

Muimum diameter root bo

in

2% 2%

2‘%e

3%

41x6 6%

8%

9%

13

13 14 alrered

b/e in bolts, the diameters th hotu, shall be larger than the in larger bolts and for in bolts and sizes above, the diameters shall not more than than the bolts. For cast iron flanges the diameters of Lhe bolt holu, ay be larger than the bolts sizes b/e in and above II (H is recammended .th at this size for steel pipes lhould bo avoidçd wherever posclible. an Tapers are not specified but shall be such that the maximum diameters at root of boss are not exceeded. in excopt for bow-flangar integral (T It is impracticable to .use hickness less than flanges. in

--`,``-`-`,,`,,`,`,,`---


27

Not for Resale

Jan.. 1965

BS*:lrO

B.S.

1 b Z q b b 9 0138833

962

TABLE ~~

of

bolb

in

Rasa

in

in 12

16

30 20 ` , ` ` ` ` , , ` , , ` , ` , , ` -

40

i-

45

(H) Fo r availability

stœ1 pìpe sizes, refer to B.S. 3601, tœ1 pipes an ubes for pressure purposes: carbon steel. ordinary duties an B.S. 3602, Stœ1 pipes and tubes for pressure purposcs:carbon stocl,h igh duties'. B.S. 78, ' C a s t iron spigot and socketpipes (vertically cast) and spigot an d socket fittings: Part Pipes B.S. 121 1, entrifugally ca st (spu n) iron pressure pipes fo r water, gas and sewage B.S. 2035, Cast iron flanged pipe B.S. 1306: Part 2, Seamand flanged fittings outside diameters cast iron pipes. less coppe r tubes fo r steam services for the sizes of coppe r pipes for use with copp er alloy flanges up to in bore. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

28 Not for Resale

B.S. continued)

?¡e.

bar

24

35

42

45

(O Fo

the bolts.

in bolts an

sizes

above, the diameters shall no ba more han% in larger than

--`,``-`-`,,`,,`,`,,`---


29 Not for Resale

L b 2 4 b h 7 0138835

BSxLO B,S.

1962

TABLE D. DIMENSIONS OF PLAIN, BOSS,

ITEGRALLI

'o ratings

D i m e d o u s o f neclu

&red

for cant iron (Pig. 7)

MJ mange liza

deslena-

tion (nominal bore of

Diamete flange

No of

bolh

Pipe)

` , ` ` ` ` , , ` , , ` , ` , , ` -

in

Bo length

)inmete amal en of bow

Maxi-

mom diamete at root

Diametc

Inre

end neck

in

3% 4% 4%

3%

.3%

10

.4

13 14

12.

12 2% For availability of steel pipe siza refer to B.S. 3601, 'Stee l es an d tubes for pressure pu rg se s: ca bo steel, orfinary duties B.S. 3602, 'Steel pi es 8 ubes for pressura purposes B.S. 78, Cast iron splgot steel, high duties socke PIP= (vert~callyca~t) spigot and socket fitting;: Part 1. Pipes',, B.S. 121 1, Ce ntdug ally cast spun) iron pressure p~ pes for B.S. 2035, Cast iron flyp p ~ p c s n d water, eawage cd fittings', for outsi$e diameter; of cast iron p,ipes. See B . S . , l306: Part 2, eamless copper tu%es for steam services for the f copper plpos bora. use wft copper alloy 0anges up to in and in bolts, the diamcten of the holes shall be larger than the bolts and 02 tn bolts and SIZCS above, the diameters shall be no more than l/ lar er than th bolts. Fo cast iron flanges the diameters of the bolt holes may larger than thefmolta of in and above. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

WELDING NECK FLANGES

i$zzq

B.S.

of

bw

pfpr)

94

2%

14

diameters, accordanœ with that the differenco botwem tho c o r m stœ1 p i p a should bo avoided wherever pocuibla

It is ro wm end ed hat thi sizo and T,)'It is impracticable

at the maximm diameters at ro ot of

thicknas less than

--`,``-`-`,,`,,`,`,,`---


31 Not for Resale

except

boss

integral

962

Bolt elrele

diameter

Of

bol&

inmeter It large md of

neclr

12

16

23

` , ` ` ` ` , , ` , , ` , ` , , ` -

16

U)

24 42 54

78 52 10 12

60

or availabilit l sizes, efer to B.S. 3601 Steel pipes and tubes for pressura purposes: carbon steel, ordinary duties an B.S. 3602, 'Steel p ~ p e s n d tubes for pressure pur oses: carbon steel, high duties Se B.S. 78, ast ir?n spigot an d socket ipes (vertia& -st) and spigot and socket fittings: Part 1. Pipes B.S. 1211, Centri8gally B.S. 2035, Cast iron flanged p ~ p m (spun) iron pressure pipes for water, gas and sewage Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

B.S.

962

lbidmaa

` , , ` , ` , , ` , , ` ` ` ` , ` -

2, eamless .S 1306 an flanged fittings fo outside $ameter ofcast iron pipes. copper tubes for steam services or copper pipes fo use wlth copper alloy ffanges up to in bore. in b o l t s and above, the diameters shall be not more than in larger than (O For tho bolts. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale 33

BS*kLO B.S.

1624669 o l ~ 3 8 8 3 ~

962

TABLE

DIMENSIONS

Diametel

PLAIN, BOSS, INTEGRALLY (For ratings

of

bolh

Blot.

` , ` ` ` ` , , ` , , ` , ` , , ` -

OF

in

6%

7% 8%

12

For availability of stœ1 pipa sizes. refer to B.S. 3601, Stœ1 ¡pes an tubes for pressure carbon st al or4inary duties nd B.S. 3602, Steel for pressure purposes: r Pcau p e s8:lw1, igh duties B.S. 74, 'Cast iron spigot an socket p (vertically cast) an B.S. 1211, Centrifugally cast spun) Ironpressure pipes for spigot and socket fittings: Part 1. PI water. ga and -sewage*,.or BS as iron p~pes nd cd fittrog8 for outsid: diameters of cast lrofi plpes. Sb0 B.S. 1306: Part 2, &am less copper steam services for the slzw of copper pipes for use with copper alloy flanges up to in bore. (O&For in and n larger thmi the bolts and in boltß, the diameters o f the holes shall be In bolts and above, the diameters ehall be no more than '/g ln lar than th bolt!. Fo Ca81 iron flanges the dfameten of the bolt holes ay be In larger than th ebo lts of sizes In and abova *.(H)


34

Not for Resale

B.S.,

bom of PiPC)

in

7% 8%

12

The diameters tabulated apply to pipe l with outside diameters in accordance with pipeamdesi ated by their bop. dunension shall be such the di8lerence between th compo dmg df kt te rs an mahtamed. ll-(J3) is re&mended.that this sizo fo steel pipea should be avoid ed wherever possible. . and-E ) T are not specified but l a l l such that the maximum diameten at root of boss are not e x d e d . (T rid P, It is impracticable to hicknea leas than except fo boss flanges integral --`,``-`-`,,`,,`,`,,`---


Not for Resale

35

B.S.

962

TABLE

";;","

Approx. utride &meterol

Bolt

iameter

kx

u&

imeter

Muimum

tr

atroot ofbow

tsmrll

diameter

PlPr)

~~~

in

in

n

29

in

u)

45

42

-

40

24

43 52%

-

24

49%

ted pipes and tubes for pressure (H) Fo r availability of st+ pipe si?, refer to B.S. 3601, B.S. 3602, feel p ~ p e s nd tubes for pressure purposes: carbon steel, ordmary d tm B.S. 78, Cast iron sp got and socket p p vert ca pur oses: carbon bteel, high dutm cast7 and spigot and socket fittin Part Pi es B.S. 121 Centrifugally cast (spu n) iron Fur? or w ater, gas anbsewag! flanged pipes and flanged as B.S. 13q6: Part 2, eamless copper Ittmgs or outside diameters of cast iron pipes. tubes fo r steam services for the sizes of copper pipes for us wlth copper alIoy flanges up to in bore (O) For in bolts and than the bolts.

sizes

above, the diameters shall be not mo re than

--`,``-`-`,,`,,`,`,,`---


Not for Resale

in

larger

B.S.

Muwtu It

kree end

neds

in

in

` , ` ` ` ` , , ` , , ` , ` , , ` -

21 22

he diameters tabulated apply to pipes with outside diameters in accordance with pipes designated by their bores. dimension shall be such tha difference between the corresponding.diameters an maintained, is


37

Not for Resale

962

BS*110 ES

l b 2 4 b b 7 01138843

T A B U F. DIMENSIONS OF PLAIN, BOSS, INTE(

962

ALLY at ng see hnenslotu for CM

Appro%. outside dlnmeter Steel PIPS+

Bolt &ele dinmeter

boltl

Bou

length

Dinmetel at small end bo

klaxhnon diameter at root

of boll

Dinmeter at large

end of neck

` , ` ` ` ` , , ` , , ` , ` , , ` -

13 15

24 24 For availab ility of steel pipa, sizes, refer to B.S. 3601, 'Steel ¡pes and tubes for pressure purposes: carbon steel,,or$nary dutles an B.S. 3602, 'Steel pipes anttubes for pressure purposes: carbon ateel, high duttes Sea B.S. 7$ 'Cast iron splgot and socket plpes (vertically cast) and B.S. 121 lpigot and socket fittine Part 1. Pi Centrifugally cast (spun) ir re e pipes for ater, gas and sewage or B.S. 2&, Cast iron flan ed p~ es nd flan cd fittlngs for outsid? diameters cast iron pipes. See B.S. 1306: Part 2, earnless copper %,, for steam scrv~ces the sizes of cop er pipes for use with copper allo flanges up to in bore. in an8% in bolts, the diameters of th Ko1e.s shall be in larger than the bolts an Fo bolts an SIZM above, tho diameters shall be #o more than in lar er than the bolts. in larger than the%oltr Fo cast iron Banges the diametem of th bolt h o l a ay be ia Copyright British Standards Institution Provided by IHS under license aud with BSI above. Not for Resale No reproduction or networking permitted without license from IHS 38

BS*I,O CAST

Tables

Lb24bb9

0138844

FORGED. AND WELDING NECK FLANGES ThidmeM

of n e e a

hn(Fu.7

B.S.

eMge

ntze

lesignation

Length

of taper

(nominal

bore pipe)

` , ` ` ` ` , , ` , , ` , ` , , ` -

in

1%

3%

1% 1% 1%

1% 1%

10 12

14

1%

15 16 17

1%

19

1%

1%

1%

1%

21 22

23 1%

For diameters tabulated apply to. p i p a with outside diameten. in accordance w it dw lgnated by thelr bores, dlmenslon shall be such that the difference between the COTTCSponding diameters is maintained. steel pipes should be avoided .wherever possible. It is recommended that this size II Tapers aro not (A, an specified but shall be such that the maxlmum diameters at root of Copyright British Standards Institution boss a re not exceeded. Provided by IHS under license with BSI for Resalefo b o s s flanges or intogral Bmges. No reproduction permitted without from IHS impracticable to uslicensethickness than inNotexcept (T,) orisnetworking $.(K) ipes

962

B.S.

962

TABU

Bolt

circle

dheter

in

27

in

in 37

42

47

Of

bolb

Diameter large end neck

24 32 32 32

availability of steel pipe sizes, refer to B.S. 3601, 'Steel pipes and tubes for pressure purposes: carbo n steel, ordina ry duties nd B.S. 3602, Steel pipes and ubes for pressure purposes: carbon steel, high duties B.S. 78, Cas t iron spigot and sock et pipes (vertically cast) spigot and socket fittings: Pa rt 1. Pipes BOS. 21 Centrifugally cast (spun ) iron ressure pipesfor water, gas and sew age B.S. 2035, Cast iron flanged pipes and flanged fittings for outside diameters cast Iron pipes. B.S. 1306: Part 2, Seamless copper tubes fo steam services for tho sizes ofcopper pipes for use with copp er alloy flanges up t in bore.

--`,``-`-`,,`,,`,`,,`---


Not for Resale

BS*lO

3624b67 338846 B.S.

mn

(pip.

neck.

962

Tbicknw of flange

Dimemioar of ateel welding necka

in

33

45

and in bolts, thediameters the holes shall be in argerthanthe bolts and (O For n fo in bolts and sizes abo ve, the diameters shall be not more than '/e in larger than the bolts. For cast he diameter of the bolt may be 1/8 in larger than the boltsof sizes in and above.


41

Not for Resale

` , , ` , ` , , ` , , ` ` ` ` , ` -

'.

BS*1O

L b 2 4 b b 7 0138847

` , ` ` ` ` , , ` , , ` , ` , , ` -


Not for Resale

B.S. OR FORGED,

WELDING NFiCK FLANGES hicknem of flange

Diameter at large -3 endof neck

` , ` ` ` ` , , ` , , ` , ` , , ` -

2% 3%

10 12 13 15 16 17 19 20 21 23 24

b/e in bolts, the above, the d diameters of th1 iameters tabula! Id by their bores. an main IS recommended tt Copyright British Standards Institution nd f3Taoersaro Provided by IHS under license with BSI sizes

~~~

in f the holes shall be larger than he bolts and fo neters hall be not more than larger than th e bolts. Fo r cast Iron oi hole ay be in and above. in larger than the bolts of sizes apply to with outside diame!ers in accordance with F or p i p lension kPsEall be such that the difference between the correspondmg ne

8 size for steel pipcs shou ld be av oided wherever possible. ipecified but shall such that the maximum dlam eten at oo

No reproduction or networking permitted without license from IHS

Not for Resale

boss

962

B.S.

962

TABLE J. DIMENSIONS

PLAIN, BOSS, INTEGRALLY (For ratings se

Dh&r

of

mot

of bo

ia

in 4% 4%

4% 1%

5% 5%

2%

7%

3%

8%

1%

12 12 12

13

10 12

13

14

14% 16 17

12 12 16 16 16

19%

20% 21

15

16

16 17 19

20 26 27

M)

20

21

22 23

24

24 32

14

or availability a t . 4 pipe $?y,efer to B.S. 3601 'Stœ1 p i p a andtubes pre~ure purposes: carbon stwl ordlnary dutm B.S. 3602, Steel plpw and tuba forpressurepurposes: carbon stœl, hiphdutí and BS 604, Sttal pipa and t u b e for pressure purposes: ow and modlum alloy B. S, 1306: Part 2, Seamlass co pp r ubos fo stcam sorv~cbs sizts of copper pipes for uao 'par alloy flanges up to bore. bolts, th diamotem th holes shall bo in in larger than for Balm an fo Copyright British Standards Institutionand tho diameters ahall be not mora than l/ ia largar than th bplt~. abow, Provided by IHS under license with BSI --`,``-`-`,,`,,`,`,,`---

No reproduction or networking permitted without license from IHS

Not for Resale

44

B.S.

1962

CAST OR FORGED, AND WELDINGNECKFLANGES Tables 3, an Dimensions

steel welding neck.! (Pie.

Tbicknwa of flange

Plange

sire leoignation (nominal bore Pipe)

in

3%

2%

4% 5%

3%

6%

9% 10%

10

13% 15% 16%

13 14

15 16 17 18 19

17%

24 (K he diameters tabulated app fy to pipes with outside designated by their bores, dimension shall be such th Tertmce between the corresponding diameters is maintained. It js recommended that this size for steel pipes should be av oided wherever possible. II Tapers ar not specitled but shall be such that the maximum diameters at root of an Copyright British Standards Institution are not exceeded. boss Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

45

` , , ` , ` , , ` , , ` ` ` ` , ` -

B,S.

1962

PLAIN INTEGRALLY CAST ( F S d s z

TABLE K. DIMENSIONS

Dhttr or

in

1%

2%

in

4%

3%

5%

3%

4%

7%

12

13

15 16 17

bd

boLt

3%

6%

9%

13

dkmetsr

in

3%

10 12

Bolt

drde

5% 6% 7% 7%

10%

14% 16

12% 14

17

15 17

19% 21%

W4 24 25

12 12 12 12 16

` , , ` , ` , , ` , , ` ` ` ` , ` -

16 16 16 16

21

23%

20 B.S. 3601, Stoel pipes and tubes or pressure or availability f steel pipesizes. ?fer B.S. 3602, 'Sta1 pipesand ubes orpressure purposes:carbon 91ee1, ordinaryduties purposes:carbon steel, high duties' and B.S. 3604, ' S t a 1 p ~ p w nd tubes for pmsure urposes: low and, medlum alloy Sec B.S. 1306: Part 2, Seamless copper tubes for steam S C T V I C ~ S for the sues f copper pipes or us with copper alloy flanm up bon. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

Not for Resale

B.S.

FORGED, AND WELDING NECK FLANGES Tables 3, an

` , ` ` ` ` , , ` , , ` , ` , , ` -

in

3%

3% 3%

4% larger than thebolts and for bolts. the diameters of th holes shall be above, the diameters shall be no more than l/ n larger than thebo lts. K) he diameters tabulatg apply t? pipe! with ouiside diameters in aprdancc with For pipes deslgnatcd by theu bores, dlmenaton shall be such that the dlffennca betwœn the conespondin8 diameters an s maintained. (1 (H is recommended that thia size fo steel pipes should be avoided whereve r posaibte (O

qg

3/ in bolts


Not for Resale

962

BSXLO B.S.

3 6 2 q b h 9 0138853

1962

TABLE

DIMENSIONS OF PLAIN. INTEGRALLY (For ratings se

~~

Dimensions of.oecks for integrally cast or forged steel Raages (Pig. (Valves only) Flange size designation (nominal bore of pipe)

Approx.

outside diameter of steel pipe*

Diameter of Range

in

1/2

Bolt circle diameter

No bolts

Diameter at large eni of neck

in

in

4% 2% 2%

2%

3%

6%

7%

3%

9%

5% 5% 12 12 12 12 16

12 13 14 16 10 12

17

16 16 16 16

13

14 15

20

16 17 18

6%

10

12 15 16% 17 18

21

35 For availability of steel pipe sizes,e,fer to B.S. 3601, Steel pipes and tubes forpressure PUrPOseS: carbon steel, ordinary du,ties B.S. 3602, Steelp ipes and tubes for pressure B.S. 3604, Steelp ipes and ubes for pressure PurPosec: carbon steel,high du es PutPoses: low and mediumalloy (P) Fo 5/ in bolts, the diameters of the holes shall be in larger than the bolts and fo ln bolts an d su es above, the diameters shall be no more tha l/ in larger than the bolts. Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

48

Not for Resale

` , , ` , ` , , ` , , ` ` ` ` , ` -

BS*IO

lb21.lbb9 0138859

B.S.

AND WELDING NECK FLANGES

CAST OR FORGED Tables an 4)

Dimensionsof sfeel welding n e d u

Tbiekneu Diameter raised

Diameter kt small end of neckt

Total length neck

Length

of taper

face

(See Clause 4) Figa. 3,

Cant or mugbt stee integral or plain Qip. 3) or wldlog except valves)

in

6/8

8% 9%

12

2%

2%

15% 16%

12

14

17

3%

2%

20

4% The diameters tabula ted apply \o pip.es with outside diameters in accordance with p~pes eslgnatefl by then bores, d.m eny on.l ha such that th difference between the correspondmg diameters and IS mamtamed. It is recommended that this size for teel hould be avoided wherever posible. --`,``-`-`,,`,,`,`,,`---


Not for Resale

962

B.S.

962

TABLE S. DIMENSIONS

Aparox. outside

dhmeter of steel pipe'

Dinmeter Bange

Bolt circle dinmeter

PLAIN, INTEGRALLY CAST OR Fo ratings see

of

b0lU

% ` , , ` , ` , , ` , , ` ` ` ` , ` -

12 11

.~

For rvailabil purposes: carbon purposes: carbon purposes: lo and (O Th diametel Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS

atœ1 pipe

ordinary high duc alloy

u,ties

efer to

and B3

S.3601 M02, 81, $604,

bolt holes ßhall be not more than

50 Not for Resale

pipes

pipes

pipes an

ubes for pressure

ubes

for pressure

pressure

larger than the bol@.

B.S.

FORGED, AND WELDING NECK FLANGES Tables and 4) Thiflms#

0mse

TO

length neck

4%

10

diameters tabulated apply pipa with outaide diametem accordance with (K kor pipa dcsipated by their bom, dimension shall such that the difference maintained. th correspondmgdiameters an or steel pi a should be avoided wherever possible. (tn is recommended that th-

--`,``-`-`,,`,,`,`,,`---


51 Not for Resale

962

B.S.

962

TABLE

PLAIN, INTEGRALLY CAST (For ratings se

DIMENSIONS

Dimeter

of bolh

&nee

in

4%

12

` , , ` , ` , , ` , , ` ` ` ` , ` -

10 12

or availability of steel pipe s i m , re,fer to B.S. 3601, Steel pipes and tubes or pressure for pressure B.S. 3602, :Steel pipesand ubes purposes: carbon teel, ordinary ,dutie purposes:carbon steel, highdut!es'and B.S. 3604, Steel pipesand ubes fo pressure purposcc: low and medium alloy (O) diamatem of the bolt holes shall no more than l/ in larger than the bolts.


Not for Resale

SI B S * 1 0 h2

1 6 2 4 6 6 9 0138858 B.S.

` , ` ` ` ` , , ` , , ` , ` , , ` -

D WELDING NECK FLANGES

FORGED, Tables an 4) Dlmemiom

ateel weId&r ncelu

Thieknslrof&Iue

(Pie.a)

Muneter rated

Dimeter

at large en

of neck

Diameter

at amdl end

of neck$

TOM kngth neek

in

in

3% 3%

4% 5% 6%

3%

4% 8%

9%

10

14 15

12 13

16 17

diameters tabulated apply pipeg with outside diameters in acyrdanca wit auch that the difference between Fo p ~ p e s esignated by them bores, dlmenslon shall corresponding diameters and maintained. steel pipes should be avoided wherever poaaiblo II is recommended that these sizcs


Not for Resale

962

1962 Aa

altered Jan 1%

min,

min,

L e n g t hov er lan ge s including w a s h e r s w h e r e i tt e d ) s n dg a s k e t

The shapa show is typical p . It#is.im ortantathat ho le ng should be as short as practtcable wlthln e requtrements spectfied. The shape of the run-out of the thread shall be smooth and free from sharp corner(^. Fig.

Shaped stud-bolt (See Clause ad)

` , , ` , ` , , ` , , ` ` ` ` , ` -


Not for Resale

B.S.

` , ` ` ` ` , , ` , , ` , ` , , ` -

Copyright British Standards Institution

962

BS*LO B.S.

b 2 4 b b 91 3 8 8 b L

962

` , , ` , ` , , ` , , ` ` ` ` , ` -

Fig. b. Application diagram for bolts and stud-bolts: Alloy s t e e l flanges Copyright British Standards Institution

B.S.

962

++"*

` , ` ` ` ` , , ` , , ` , ` , , ` -

clauas 4. NOTE. Refer

B.S. 80 for weld preparations for steel flaw Steel or copper alloy plain flaagc Fig.

Clause4. RADIUS I/, in inclusive, Flange s i z e s I/, in in max. Flange sizes 4f to in inclusive, in max. Flange sizes in to in inclusive, in NOTE, Bos$ flanges apply only to Tables A to inclusive. Steel boss Beage Fig.


Not for Resale

B.S.

962

rr”I Back

flanao

DIAMETER Minimumvalues ar e give ia Tables R, an ensure adequato reinforcement of the flanges.

dia.

less than

di8. CtY4

Fig.

in

**

5a DIMENSION is th B a c k of f l a n g e distancem achined flat for before backfacing or washer seating. Th is distance should be the minimum necessavor such seating. NO TE. Un ified heavy series nuts re large across to comers to e used with these flanges as the necessary value of would result in the completee moval Radius in many sizes,

in max.

` , ` ` ` ` , , ` , , ` , ` , , ` -

dia.

RADIUS R, MINIMUM All Tables: in for flanges up to and including lm in size, in all other sizes.

dia.

dia.**X Fig.

d’ia.

less t h a n C + v 4

claw 4.

Fig.

Integrally forged or cast steel


58

Not for Resale

for valves only

` , ` ` ` ` , , ` , , ` , ` , , ` -

B.S.

flanges t o 3 h i n sizes '/2 n c. t o a b l e D, oth.er sizes a n d a b l e s


962

B.S. DIAMETER

LENGTH

Minimum values are given in Tables nd ensure adequate reinforcement of the flanges. Minimum values are also given in Tab le for flanges As 78 in to 12 in size. Jon.. 196s

RADIUS MINIMUM in to 1112 in bore inclusive in in to 18 in bore inclusive in 20 in and above altered

` , ` ` ` ` , , ` , , ` , ` , , ` -

n.

Provided dimensions are adhered to, spot facing or back facing is necessary except for 24 in size in Table

adil

mg. 7. Integrally cast iro fianges (Tables and (applies also to Table flanges 78 in to 12 in).


Not for Resale

Jan.,

1965

Lb24667 OL388bb

BS*LO

B.S.

APPENDIX INFORMATION

BE SUPPLIED

PURCHASER

It is recommended that, in the enquiry or order, the purchaser should specify the following: The design temperature andpressure for which the flanges are required or the Flange Table (Clause 2) Flange size designation. (Clause 3. 3. The material required. (Clause 5a toj.)

4. The type of flange if suppliedoose and the preparation for attachment to pipes., if other than as specified in Clause 7b. the flanges are required undrilled. (Clause 4c.) 5. If the backs the flanges are required to d for o er than a cast steel integral flange. (Clause 4b.) 7. If a raised jointing face is r e q M for steel flanges, Tables to inclusive. (Clause i).) 8. 9.

the flanges

to be marked to identify the material. (Clause 5.

certificates are required the process, chemical analysisand physical properties the material. (Clause 5. a particular type of stud-bolt is required. (Clause 6d(i) to (vi).) If bolts, stud-bolts and nuts are to be marked to identify the material. (Clause


Not for Resale

` , , ` , ` , , ` , , ` ` ` ` , ` -

bs 10

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