Method Statement for Sprinkler & Stand Pipe

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METHOD STATEMENT FOR INSTALLATION OF FIRE PROTECTION SYSTEMS (Sprinkler & Standpipe Piping)

PAGE: 1 of 7 DATE: 02-Apr-2008‫‏‏‬-

Contents 1.

Scope

2.

Purpose

3.

References

4.

Safety instructions

5.

Material Storage

6.

Procedure of Installation

7.

Hydraulic pressure testing procedure

8.

Pipes Flushing

9.

Tools & Equipment Required

METHOD STATEMENT OF FIRE FIGHTING INSTALLATION – Page 1 of 7

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PAGE: 2 of 7 DATE: 02-Apr-2008‫‏‏‬-

1. Scope:Scope of this document is to define, describe and present the procedures involved in the installation, testing and commissioning of Fire Protection pipe works for Sprinkler and Standpipe system to be installed in this Project.

2. Purpose:This document is intended to be read and understood by all concerned parties such as, Installation technicians, supervisors, Project engineers, QA/QC Engineers and Safety Engineers, for assurance of adherence to right procedure through out the process of installation.

3. References:12345678-

Project Specification. Approved Shop drawings. NFPA 10 standard for fire extinguishers, portable and mobile. NFPA 13 Standard for installation of Sprinkler systems. NFPA 14, Standard for the installation of standpipe and hose systems. NFPA 20, Standard for installation of centrifugal fire pumps. Dubai Civil Defense Regulations. Manufacturers Recommendation.

S N

Description of Work

4 Safety Instructions:. 4.1 4.2 4.3 4.4 4.5 4.6 4.7

Ensure that all the access means – scaffolding, stepladders are of good quality and strength. Do not use weak or broken scaffolding or stepladders. Always use hard hats at the construction premises. Wear Hand gloves whenever working at site. Wear Goggles of adequate visibility, whenever using gas torches, grinders, cutting machines, or doing chipping, drilling etc. Do not use goggles with scratched glasses or of poor visibility. Always wear Coveralls sufficiently tight around body. Do not wear excessively loose coveralls. Safety shoes must be worn always. Wear safety belts whenever working at heights exceeding 1.5 Mtrs. METHOD STATEMENT OF FIRE FIGHTING INSTALLATION – Page 2 of 7

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METHOD STATEMENT FOR INSTALLATION OF FIRE PROTECTION SYSTEMS (Sprinkler & Standpipe Piping) 4.8 4.9 4.10 4.11

4.12 4.13

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Lifting of any material or equipment should be done only by means of chain / Electric hoists appropriately supported. Avoid standing right below to items being raised. Always use proper slings other approved media for binding the item being lifted. Ensure adequate lighting and ventilation whenever working in confined spaces. Carry out works in such areas, only when free entrance and exit from and to the area is ensured and entry / exit is continually manned during the whole working period. Application of Paints, primers, thinners varnishes etc. should be carried out at ventilated places only. Check with your supervisor for any additional measures required from time to time as issued at site.

5 Material Storage:. 5.1

The site store will be furnished with racks and tool boxes where applicable.

5.2

Required quantities of equipment will be stored partially in each level of the site in locations agreed by the MC.

5.3

The equipment will be stored properly, stacked and covered from exposures.

6 Procedure of Installation:. 6.1 General 6.1.1 Make available at site, an approved copy of shop drawing for the intended installation. 6.1.2 Ensure that all materials delivered to site are according to the approved material submittal & shop drawings. 6.1.3 Examine the materials delivered to the work place, and ensure that the materials and are free from damage. Any damaged or defective materials found will be set aside 6.1.4 Physically and dimensionally check and ensure the proposed pipe routing is feasible and not clashing with any other services. 6.1.5 Ensure that, the pipe routing is feasible in terms of pipe supports. That is, there should be solid building structures available to support the pipes. METHOD STATEMENT OF FIRE FIGHTING INSTALLATION – Page 3 of 7

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6.2 Preparation & Installation 6.2.1 Thoroughly clean the pipe surfaces with damp cloth and let dry the surface. In case, if any foreign material remain on the surface, which cannot be cleaned by damp cloth, then use a mild wire brush to remove the same. 6.2.2 If pipe surface is contaminated with oily material, then use a wash solvent. 6.2.3 Prepare a fresh mix of primer with adequate quantity of solvent thinner. Mix thoroughly to achieve a paste consistency. 6.2.4 First coat of primer will be applied using Brush / Roller. 6.2.5 Keep the painted pipe in safe place for a period as recommended by the manufacturer so as to get the paint dry thoroughly. 6.2.6 Based on the approved shop drawings, square cut pipes with a pipe cutter – machine mounted or manual, to the exact length, as required. 6.2.7 Second touch up primer coat will be applied after the pipe hanging & Final paint coat will be applied after installation completion. 6.2.8 Use strong and purpose built roller pipe stands whenever carrying out operations like threading, pipe cutting or roll grooving. These supports stands should be so positioned in such a way that the whole weight of the pipe is directly taken by the stands, and not otherwise. 6.2.9 For pipes of sizes, 2” and below, thread the pipe ends using the standard threading machine having BSPT dies. 6.2.10 Thread length should not exceed in such a way that, a maximum of one and a half threads exposed when the joint is finally pulled in place. 6.2.11 For joining the threaded pipes and fittings, use jute & shellac. For equipment connections which may require replacement or renewal, Teflon threads sealing tapes to be used. 6.2.12 For grooved joints, roll cut the groove to a depth as given in the fittings manufacturer’s data sheets. Additionally, check the groove depth physically by inserting a grooved coupling half into the groove and ensure the fitting snugly and smoothly go around. 6.2.13 Liberally apply gasket lubricant around the groove and on the gasket internal. Use fittings manufacturer’s supplied / recommended material only for this for this purpose.


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6.2.14 Marking the routes of the pipe work will follow the approved shop drawings and site co-ordination with other services based on given and final benchmarks. In case of on site co-ordination, changes will be reflected on the as built drawings. 6.2.15 After marking the pipe routes, the anchoring points will be drilled according to the support spacing as shown on the approved shop drawings. 6.2.16 The approved type of pipe support / clamp will be attached to the threaded rods. Nuts and washers will be installed as well. 6.2.17 M10 Anchors will be used to support 4” and below pipes while M12 Anchors will be used to support 6” pipes and above as recommended by the manufacturer. 6.2.18 Lift the pipe to the installation level and support it temporarily by reliable means. 6.2.19 Insert the pipe hanger around the pipe and lock in place by inserting the knurled nut. 6.2.20 Screw in the hanger insert nut to the thread rod and bring into the required level.

7 Hydraulic pressure testing procedure:. 7.1 Pre-testing:7.1.1 Make available a highlighted drawing of area intended for hydrostatic pressure testing. 7.1.2 Indicate on the drawing the location of vent / drain valve, plugged connections and water pressure pump connection. 7.1.3 Make sure the test witness timing and durations are agreed by the CO. 7.1.4 Ensure that, an approved method statement of hydraulic pressure testing is readily available at the location of testing until the test approval sheet is signed off. 7.1.5 Place safety warnings at all points where personnel may pass through within the vicinity of testing.

7.2 Hydrostatic testing of pipe work. 7.2.1 Make sure that no equipment item, such as sprinklers, valves, etc. are subjected to the pressure test.


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7.2.2 The entire pipe work shall be tested hydraulically up to 1.5 times of normal operating pressure plus 3.5 bar and for duration of 6 Hrs. (the pressure after PRV will be considered as operating pressure in sprinkler piping in each floor) 7.2.3 Physically check and ensure that all pipes undergoing test is strongly supported and addition of pipe work will not introduce undue stress on any support. 7.2.4 Make sure that, all open pipe works are suitably plugged. 7.2.5 Attach the pressure pump to the desired location through an isolation valve, by pass valve and a calibrated pressure gauge to indicate the pressure on the pipe work. 7.2.6 Ensure the calibration certificate for the pressure gauge is valid. 7.2.7 Attach a drain valve at the lowest part of the pipe work, an air release valve at the highest point of the pipe work along with an isolation valve and a calibrated pressure gauge at the farthest end of the pipe work under testing, to indicate the pressure of water within the pipe. 7.2.8 Once the visible checks are satisfactory, start filling the pipe work with clean water of ambient temperature. 7.2.9 During the process of pipe filling, keep the air release valve isolation valve opened in order to purge any air in the pipe work. 7.2.10 Once the pipe work is filled with water, close the test water inlet and air release valve. Observe any leakage and If found, immediately rectify before proceeding. 7.2.11 If there is no sign of leakage, increase the water pressure in the pipe work gradually in increment of 2 bars. 7.2.12 After increasing every 2 bar pressure, check and ensure there is no leakage, and hold for 10-15 minutes before applying pressure again. 7.2.13 On reaching pressure test value, close all valves. Ensure that, the valves will not be operated by any unauthorized personnel. 7.2.14 Log the readings in the Pressure Testing form and sign off. 7.2.15 Keep the report in safe custody, for future reference.

8 Pipes Flushing:.


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PAGE: 7 of 7 DATE: 02-Apr-2008‫‏‏‬-

8.1

Flushing of the system will be after the successful completion of the pressure testing. This will be done during the sectional installations of the system and after the completion of the whole pipe work assembly.

8.2

Enough draining points will be left for this purpose. These points will be the lowest point of the area / zone and the water supply point.

8.3

The water will be pumped to the water supply point using the existing fire pumps and the lowest points will be connected to the nearest drainage facility via a hose.

8.4

The pipe network will be flushed to ensure that the pipes are clean from debris and other work residual.

8.5

Flushing will continue until we get clear water at the drainage side.

9. Tools & Equipment Required:The following tools are required for the activities involved 1- Pipe cutting and Threading machine 2- Pipe Roll Grooving machine 3- Chain hoists – 3 tons 4- Assorted wrenches and hand tools 5- Hole cutting machine **************** End of Section ****************


Method Statement for Sprinkler & Stand Pipe

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