METHOD OF STATMENT FOR PLUMBING PROCEDURE
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| WWW.HVACMEPCONTRACTORS.COM METHOD OF STATMENT FOR PLUMBING PROCEDURE |
PROCESS FOR INSTALLATION OF
PVC/uPVC PIPES
COMPANY NAME
Project: Sewerage
TABLE OF CONTENTS
INDEX Page#
l . Purpose... .03
2. Scope of Work... ..03
3. Reference... . . . . . . .. . . . . .. . .03
4. Responsibilities.... . . . . . . . . . .. . . .. . . . . . . . . . . . . . . . . . . . . .
5. Delivery, Storage, Handling and Preservation.. .05
Method / Procedure of PVC / uPVC Pipes . .09
5.1 Types of Joints (PVC/uPVC).. ...09
5.2 Pipes Joining (PVC/uPVC). . . .10
5.3 Installation/AssembIing of PVC/uPVC Pipes.
6. Trench Preparation. .12
6.1 Preparation of Bedding Layer.... 12
6.2 Installation of Pipes in the Trench... .12
6.3 Multiple Pipes in one Trench.. .13
7. Inspection and Test Plan. .13
1 1.1 Testing Requirements... .
8. Backfilling.. .14
9. Safety Requirements.. .15
1. PURPOSE
To ensure that each one PVC/uPVC piping installation area unit perform in associate economical and effective manners, therefore on give a product/services that adjust to any or all specification, codes and standards demand of the project.
2. SCOPE of labor
This procedure covers the sector, Mechanical and Flanged joints and gift general pointers to method on PVC/uPVC piping for the development of . This procedure is applicable to any or all PVC/uPVC pipe diameters.
3. REFERENCES
CLIENT Engineering Standards
ES-A-004 General needs for Pressure Testing
ES-L-610 Non-metallic Piping ES-S-OIO healthful Sewers
ES-S-020 drain and Sewers
ES-S-060 CLIENT Plumbing Code
ES-A-114 Excavation and Backfill
CLIENT Materials System Specifications
-024 Pipe Handling and Nesting
CLIENT Standard Drawings
Supports for Plastic Piping
sleeved Crossing for Restrained Pipelines
Industry Codes and Standards
Through sixty five ln. (100 millimeter Through one ,650 mm), for Waterworks
Underground Installation of versatile Thermoplastic Sewer Pipe
Solvent Cement for PVC Plastic Pipe and Fittings
creating Solvent Cemented Joints with PVC Pipe and Fittings
F-402 Safe Handling of Solvent Cements and Primers Used for
Joining Thermoplastic Pipe and Fittings
-493 Solvent Cements for CPVC Plastic Pipe and Fittings
4. RESPONSIBILITIES
Project Manager
The Project Manager has the general responsibility of verificatory and implementing this methodology Statement.
Site Construction Manager
The Site Construction Manager is answerable for reviewing this procedure of this methodology statement and of any sequent revision. he's additionally answerable for guaranteeing that each one works area unit performed timely, properly, accurately and fully and other than ensuring that corrective action is taken just in case the work isn't done properly.
QC Manager
The QC Manager is answerable for reviewing this procedure and additionally has the general responsibility of guaranteeing that works within the field area unit performed in compliance with all applicable quality as per standards, stipulations and procedures additionally to making sure that corrective actions area unit taken in cases wherever works don't seem to be performed as per shopper standards.
Quality Control Inspector
Conducts daily in-house inspections of completed parts of labor in
Coordination with the Project Engineer and ensures that each one corrective actions necessary from the comments throughout the inspections area unit performed promptly by the positioning Engineer and/or Foreman.
Submits the RFI (Request for Inspection) to PID and coordinates with them on the relevant scrutiny needed when in-house verification of the
completed work by the development team to confirm compliance to the specification needs.
Ensures all scrutinys area unit performed and every one relevant inspection forms area unit
accomplished as per Project Specifications and applicable ITP.
Coordinates with the positioning Engineer and CLIENTRepresentative throughout inspections
Secure quality documents approval
5. DELIVERY, STORAGE, HANDLING & PRESERVATION
Delivery, Storage & Handling
• On web site pipe storage shall meet all manufacturers' needs
• Solvent cement associated primer for thermoplastic piping shall be hold on in an airconditioned building with a most temperature of twenty six.7Q C.
• Pipe and fittings shall be properly protected against impact, particularly on their ends. They shall not be thrown, dropped, bumped, hit, or dragged and pushed over abrasive surfaces.
• Adhesive and solvent cement containers shall be tightly closed once not in use, and shall be came to the storage facilities to reduce exposure to excessive temperatures.
• Transport individual pipe lengths to the task web site on cushiony bunks with nylon tie-down straps or cushiony bonding to safeguard the pipe.
• Anchor pipe firmly to forestall slippage.
• Store individual pipe lengths on earth bens or timber cradles within the numerical order of installation.
• Stack the heaviest series of pipe at the lowest. don't stack pipe in far more than 20-rows high.
• Protect the pipe from stones and sharp objects.
• Store fittings in their original cartons.
• Lift pipes with handling beams or wide belt slings close to the center of joints as suggested by the pipe manufacturer.
• Do not use cable slings, chains, or hooks.
• Before installation, check pipe and fittings for cuts, scratches, buckling, kinking, or cacophonous .
• Remove any pipe section containing defects by ablation the broken section in a very complete cyfinder.
• All the broken pipe ought to be hold on in quarantine space with identification mark.
PRESERVATION
• Solvent cement primer and adhesive containers shall be protected against direct daylight.
• Material hold ought to be visited and inspected all material on weekly basis.
• For long run storage, pipe racks ought to give continues support, however if this can be unfeasible, timber of a minimum of 3in bearing breadth at spacing not bigger than 2ft. centers for pipe sizes one60mm and on top of ought to be placed to a lower place the pipes and at 1.5m centers at the aspect, if the stacks area unit rectangular.
• For temporary storage within the field, wherever racks don't seem to be provided, the bottom ought to be level and free from loose stones. Pipes mustn't exceed 3 layer high and may be stacked to forestall.
• Stack heights ought to be reduced if pipe area unit nested, etc.. pipes hold on within pipes of larger diameter. Reduction tall ought to be
proportional to the burden of the nested pipe compared to the burden of the pipes usually contained in such stowage.
• Any primer, solvent cement, or adhesive that's on the far side the sealed expiration date shall be discarded. Solvent cement that has gelled or thickened shall be discarded. leaky or opened containers shall even be discarded
6. change of integrity methodology one grouping PROCEDURE OF PVC one uPVC PIPES
6.1 styles of JOINTS
A. RUBBER RING SEAL JOINTS
Installation of Thermoplastic Pipes. All PVC/uPVC/ CPVC pipe shall be assembled, and put in in accordance with ASTM code, manufacturer's recommendations, and this procedure.
Joints shall be created in accordance with D2855 for PVC and F493 for CPVC. Solvent cement shall adjust to the subsequent ASTM Designations:
D2564 for change of integrity PVC to PVC, and
F493 for change of integrity CPVC to CPVC or PVC.
Primer and solvent cement shall be handled in accordance with the security precautions in ASTM F402 for restrained sort joints.
Solvent cement shall not be used past the manufacturer's expiration date on the label or one year past the date of manufacture if there's no expiration date given.
6.3 INSTALLATION one collection OF PVC/uPVC1 CPVC PIPES
Flat washers shall be used beneath crackers and bolt heads on nonmetallic flanges
Plastic pipes like PVC, UPVC, cpvc, PP etc shall be shielded from contact with concrete by tape wrapping.
At the sides wherever a thermoplastic pipe or fitting enters or leaves a thrust block, it shall be wrapped with synthetic rubber wrapping which will protrude slightly from the block. The thickness and also the breadth of wrap shall obey Vibrators shall be unbroken away from the piping whereas casting concrete thrust blocks.
The pipeline ought to be tested at first once joints to confirm that they need been created properly, and later at convenient intervals, ideally not exceptional a thousand meters.
Before testing, the road should be backfilled departure the joints exposed. If the joints should be coated, it's helpful to mark their position.
it's important once giving birth uPVC pipes for gravity voidance to confirm that the pipe is set in accordance with the recommendations of the manufacturer.
7.0 Trench Preparation
Following points ought to be thought-about throughout trench excavation
Take necessary safety precautions to confirm a secure operating atmosphere.
stop water penetration into the ditch.
throughout excavation, make certain that trench walls keep vertical position.
For a flat bedding, take away all obstacles and sharp edges like rocks, gravels, concrete, etc. from the ditch.
take away all organic things like plants, tree roots, etc. from trench ground.
make sure that trench ground is robust and stable.
If the ditch ground isn't stable enough, increase trench depth for stabilization works.
Discharge water (if there's any) from the ditch before bedding preparation. once the underground water level is high, it'd cause pipes to float. to forestall floatation, increase the ditch depth to extend the peak of backfilling.
make sure that trench breadth is spare enough for bedding and backfilling compaction works.
make sure that excavated materials area unit heaped at a distance from the ditch to avoid the chance of rot back to the ditch
Trench walls ought to be supported with sheet piles if the natural ground soil is unstable.
The minimum trench breadth from very cheap to three hundred metric linear unit higher than the highest of the pipe shall be as shown in below Table
Preparation of Bedding
Trench bedding ought to be two-dimensional, levetted and com pacted angular position on the ditch. beneath unstable soil conditions, trench depth and bedding thickness may be enlarged.
After trench excavation, bedding ought to be ready to supply sturdy and stable support for pipe. Pipe bedding mustn't be tess than 15cm tall and will be ready with compacted granular material at minimum ninetieth customary Proctor Density or the other appropriate substance at minimum 0/095 customary Proctor Density.
Bedding depth ought to be enlarged if there area unit unstable, loose or soft soil conditions. If substance is sandy, substance ought to be moisturized and will be compacted with vibratory compactors. Bedding should be flat and levelled with the ditch bottom.
A non-woven geotextite with a unit weight of a minimum of a hundred g/m2 should be placed between the crushed stone and also the sand bedding layer to forestall filtration of the sand bedding into the crushed stone matrix.
The trench bottom shall be continuous, smooth, freed from rocks, and to the road and grade shown on the installation drawings.
Bedding material characteristics area unit important for a correct support for the pipes. typically bedding and backfilling materials area unit most popular to own identical characteristics. If the excavated material is most popular to be used as backfilling material, characteristics of the excavated soil ought to be analysed for suitableness. Another crisis to be taken into thought is that the risk of experiencing totally different soil characteristics on the pipeline
7.2. Installation of Pipe within the Trench and Lifting
After completion of trench excavation and bedding, installation will begin in line with the project. Pipes and fittings ought to be hold on on the pipeline next to the ditch in step with the daily installation program for a quicker and easier installation. hold on merchandise mustn't block the operating path of the
7.3 Multiple Pipe in one Trench
During installation of multiple pipes during a single trench, distance between any of two|the two} pipes is decided with the formula (r1+ r2) / 2 whereas r 1: radius of the primary pipe and Q: radius of the second pipe. compliant with the formula or Manufacturer recommendation for the gap of pipes within the same trench.
8.0 scrutiny & check set up
Work execution scrutiny and check shall be monitored and witnessed as per Aracmco ITP and scrutiny listing as applicable.
Request for scrutiny (RFI)QC inspector ought to issue a RFI twenty four hour as for scrutiny and remote space location as per Schedule to allow SAPMT to verify the readiness of the check / scrutiny and to tell CLIENTI PID QC scrutiny prior to.
8.1 TESTING needs
• Visual scrutiny
All PVC/uPVC pipe and fittings shall be visually inspected for scratches, broken ends, cracks, crushing, weathering, and cracked O-rings and gaskets.
Each piece of pipe and fitting shall be examined for cuts, scratches, gouges, kinks, buckles, and ultra-violet (sun) injury. broken lengths of pipe shall be cut out and discarded. broken fittings shall be discarded. Pipe and fittings that show ultra-violet injury and weathering effects shall not be used
12.BACKFlLLlNG
When the pipe installation and hydro testing is completed and booming, backfilling of the pipe can follow. However, partial backfilling before hydro — testing is allowable on condition that the coupling joints or lamination joints area unit exposed. throughout backfilling the subsequent area unit to be followed. Proper choice, placement and compaction of the pipe zone backfill square measure necessary for dominant the vertical deflection and square measure crucial to the pipe performance.
Attention should be paid in order that the backfilling material isn't contaminated with trash or different foreign materials that might injury the pipe or cause loss of aspect support.
throughout backfilling, the granular material ought to flow utterly beneath the pipe to produce full support.
correct backfilling ought to be exhausted one hundred fifty millimeter to 300mm lifts counting on the backfill material and compaction material. three hundred millimeter lifts are adequate for gravel as a result of it's simple to compact.
Compaction of sandy backfill is most simply accomplished once the fabric is with regards to its optimum wetness content. once backfilling reaches pipe spring line, all compaction shall be done 1st close to the ditch sides and payoff towards the pipe.
it's counseled that putting and compacting of the pipe zone backfill is finished in such how on cause the pipe to levelized slightly within the vertical direction
The clean sand bedding shall be compacted to seventieth denseness (ASTM D4253/ASTM D4254). The clean sand from rock bottom of the pipe to three hundred millimeter on top of the highest of the pipe (sand cover) shall be compacted by water flooding and hand tamping solely. No compaction testing is needed during this section of the ditch.
Within three hundred millimeter of the highest of the pipe, backfill shall be hand tamped, or a board shall be wont to shield the pipe from injury from moving plate compactors Backfill on top of three hundred millimeter sand cowl in Non-Traffic space shall air website excavation or borrowed materials that meet the subsequent conditions:
Minimum cowl over prime of Pipe
Type of Pipe Nominal Pipe Size and Service Minimum cowl (mm)
Thermoplastic Sewers, gravity flow 900
Thermoplastic Pressure pipe beneath a hundred millimeter size 600
Thermoplastic Pressure pipe a hundred millimeter and bigger sizes 900
Thermoplastic Irrigation, beneath ninety millimeter size 300
Thermoplastic Irrigation, ninety millimeter and larger 600
13. SAFETY needs
• All works shall be exhausted accordance with the shopper Project HSE Manual and every one individuat activities shall be started in associate orderly manner to make sure compliance with the wants.
• Work allow shall be secured by the positioning Engineer before finishing up any work and work shall proceed in accordance with the particular measures itemized within the allow.
• Relevant info on the allow shall be created accessible to any or all operative performing arts the work by providing a duplicate to the Bulletin Board nearest or adjacent to the work space
• The Safety Supervisor / Safety Officer is accountable beside the positioning Engineer for guaranteeing that each one operations square measure being finished due regard for the protection of personnel property likewise because the generat public.
• All PPEs shall be worn by personnel performing arts the work all times fully compliance to safety rules on PPE •S. further PPEs like respirator, rubber hand gloves and disposable coveralls shatt be provided throughout lamination and grinding works.
• Barricades shall be provided to isolate the work space however correct access shall be provided to any or all operatives.
• The worksite shall be maintained in a very clean and tidy condition.
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