The standards for storing anti-corrosion steel pipes

December 10, 2023

Faced with the storage issue of anti-corrosion steel pipes, I believe many friends have doubts in this regard. Today, we will introduce the storage issue of anti-corrosion steel pipes and give a brief introduction!

1. The appearance of anti-corrosion steel pipes entering and leaving the warehouse needs to be inspected as follows:

① Conduct a root by root inspection to ensure that the surface of the polyethylene layer is flat and smooth, with no dark bubbles, pits, wrinkles, or cracks overall, and the overall color needs to be more uniform. The surface of the pipe should not have excessive rust.
② The curvature of the steel pipe should be less than 0.2% of the length of the steel pipe, and its ellipticity should be less than or equal to 0.2% of the outer diameter of the steel pipe. The surface of the entire pipe has a local unevenness of less than 2mm.

2. The transportation of anti-corrosion steel pipes should pay attention to the following points:

① Loading and unloading: Lifting equipment that does not damage the pipe opening should be used, and the anti-corrosion layer should not be damaged. All construction machinery and equipment must comply with regulations during loading and unloading. Before loading, the anti-corrosion grade, material, and wall thickness of the pipes should be checked in advance, and mixed loading is not advisable.
② Transportation: A thrust stop plate needs to be installed between the trailer and the cab. When transporting anti-corrosion pipes, it is necessary to tie them firmly and take timely protective measures for the anti-corrosion layer. Rubber plates or some soft materials should be used as padding between the anti-corrosion pipes and the frame or pillars, as well as between the anti-corrosion pipes.
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3. What are the storage standards

① Pipes, fittings, and valves need to be properly stored according to the instructions, and attention should be paid to inspection during storage to avoid rust, deformation, and aging.
② Some materials such as glass cloth, Cold Applied Polymer Tape, 3LPP Wrap Around Sleeves, and heat shrink sleeves need to be stored in a dry and well ventilated warehouse.
③ Materials such as pipes, fittings, and valves can be classified for outdoor storage. Of course, the selected storage site should be flat, free of stones, and there should be no standing water on the ground. Ensure a slope of 1% to 2% and have drainage ditches.
④ The anti-corrosion pipes in the warehouse need to be stacked layer by layer, and their height needs to ensure that the pipes do not lose their stable shape. Stack separately according to different specifications and materials. Soft pads should be placed between each layer of anti-corrosion pipes, and two rows of sleepers should be placed under the lower layer of pipes. The stacked pipes should be greater than 50mm from the ground.
⑤ If it is during on-site construction, there are some storage requirements for the pipes: two support pads should be used at the bottom, with a spacing of about 4m to 8m. The anti-corrosion pipe should not be less than 100mm from the ground, and flexible isolation materials should be placed between the support pad, anti-corrosion pipe, and anti-corrosion pipe.

Anti corrosion steel pipes mainly refer to pipeline coating with Cold Applied Polymer Tape, (Innerwrap Tape, Outerwrap Tape), 3LPE Heat Shrink Sleeves, and 3LPP Wrap Around Sleeves.
The above are various storage standards for anti-corrosion pipelines. Thank you for reading them.

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Ms. Tao

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