GENERAL PIPEWORK | Pre-Commissioning CheckList

This General Pipework checklist can be used and completed throughout the project and its different stages covering:

• delivery,
• storage,
• installation &
• pre-commissioning/pre-functional

Once the pre-functional checks have been completed, including all equipment and ancillaries related to the pipework system, the full functional testing/commissioning can be conducted.

This checklist should be used and completed throughout the project, and its different stages, delivery, storage, installation & pre-commissioning, before the functional testing occurs.

Delivery Inspection

Once the Pipework arrives at the site, usually delivered by a transport company, and before being accepted into storage, the following should be checked with the driver.

Any damage that is noted should be reported to the manufacturer/supplier immediately in writing supported with photographs.

Ref	Inspection/Task
1	Supplier's consolidated delivery ticket is available, showing all equipment and ancillaries for inspection and being used to check against.
2	A copy of the order that was sent to the supplier is available for reference and is being used to check against.
3	Pipework is packaged with end caps to protect the internal surfaces.
4	Pipework has the correct wall thickness.
5	Pipework has the correct flanges.
6	Pipework is dry internally.
7	Pipework is not damaged.
8	Pipework surfaces are clean and not scratched
9	Red oxide paint has been applied, where required and is in good condition.
10	All ancillaries are included in delivery as per the order and delivery note
11	Replace any protection that has been removed

Storage Inspection

Storage Area

If the pipework is to be placed into storage on site prior to installation there will be an inspection completed checking the following.

Ref	Inspection/Task
1	The area is internal and will not be affected by weather.
2	If the pipework is not to be stored internally but externally, there is sufficient protection available to protect it from weather and ambient conditions.
3	The surface where the pipework is to be placed is flat.
4	The area is well covered and protected.
5	The area is well ventilated and no risk of high humidity.
6	The area is clean & dust free.

Storage of the Pipework

Prior to the pipework being placed into storage, the following should be checked.

Ref	Inspection/Task
1	Pipework will not be over stacked.
2	Pipework will not have materials stacked on it.
3	All ancillaries will be placed in a safe and secure location, so items do not go missing or get damaged.
4	Pipework/connection caps protecting the flanges are not removed.
5	The pipework will be raised from the floor to allow airflow and stop risk of water ingress.

Pre-Installation Inspection

Prior to the pipework being installed the following should be checked.

Ref	Inspection/Task
1	The bracketry is ready and can bear the weight of the installation and has been spaced correctly.
2	The room/area is dry and watertight.
3	Area being installed is not prone to flooding or ponding of water.
4	The room/area the pipework will be installed into is clean and dust-free. If there is dust/construction work, then the pipework should be protected from concrete dust, cement etc.
5	Check to ensure that all connection kits containing - gaskets, bolts, are available to allow bolting up of the pipework.
6	Pipework is clean and free of damage

Maintenance/Access

Ref	Inspection/Task
1	There is enough space allowed around and above the pipework once installed to perform maintenance and remove components, where required. [check the manufacturer's maintenance instructions for requirements]

Pre-Commissioning Inspection

Once the pipework has been installed and prior to the functional testing and commissioning phase taking place, the following will be checked.

General

Ref	Inspection/Task
1	Pipework is installed in line with the project drawings [size, location].
2	Piping is free to expand and contract without noise or damage to hangers, joints, or the building.
3	Seismic restraints, where required, installed.
4	Pipework does not put undue stress on equipment, where connected and is bracketed to support itself.
5	All piping supports and hangers meet criteria set out in the specifications.
6	Piping is installed with sufficient pitch and arranged in a manner to ensure drainage and venting of the entire system.
7	Manual air vents are provided at high points in closed water systems.
8	Ensure all gaskets are installed and sealed.
9	Ensure that all bolts are installed as per manufacturer's instructions.
10	Any nipples installed are made of the same material as the pipe.
11	Any connections between copper and steel pipes are made with dielectric fittings.
12	A union is provided ahead of each screwed valve, trap, or strainer, and on each side of each piece of equipment and whatever needed to dismantle piping.
13	Any changes in pipe sizes are made with the proper size reducing fittings, reducing fittings, reducing elbow, or reducing tees. Bushings are not allowed.
14	All fittings meet specification requirements.
15	All fittings and ancillaries are rated correctly and inline with the pressure of the system.
16	All equipment requiring maintenance is accessible (valves, junction boxes, etc.).
17	Piping does not block access to equipment that is part of this system or another system (e.g., air terminal units).
18	Drain valves are provided at all low points in hose bib piping to facilitate seasonal draining.
19	All valves [isolation, commissioning, non-return etc] are installed as per the drawings
20	All strainers are installed as per the drawings and baskets are clean.
21	Pipework is insulated as per the specification and vapor sealed where required.
22	Piping is installed in a manner to ensure that insulation will not contact adjacent surfaces.
23	Any pipe openings are temporarily sealed to maintain piping system cleanliness.
24	All components including valves and controls are labeled in line with the project naming convention.
25	Instruments, flow meters, energy meters, and commissioning stations have been installed in line with the manufacturer's requirements and correct direction. This includes distances from turbulent flows etc.
26	All pressure gauges installed, and display scale as per design requirements.
27	Pipework has been magnetic weld tested, where specified.
28	Pipework has been ultrasonic weld tested, where specified.
29	System has been filled and bled with air removed.
30	Pipework has been pressure tested.
31	Pipework has been internally flushed, cleaned and chemically treated.

Documentation

Ref	Inspection/Task
1	All drawings have been updated to reflect any changes made.

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General Pipework Checklist [Open]

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General Pipework Pre-Commissioning Checklist [Microsoft Excel]

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