Standards for the storage of anti-corrosion steel pipes

Inspection Guidelines for Anti-Corrosion Steel Pipes

Warehouse Entry and Exit Appearance Checks

Surface Quality: Each pipe must be inspected to ensure the polyethylene layer is flat and smooth, free of dark bubbles, pitting, wrinkles, or cracks, and has a uniform color. The pipe's surface should not exhibit excessive corrosion.

Curvature and Ellipticity: The curvature of the steel pipe should be less than 0.2% of its length, and the ellipticity should be≤0.2% of the outer diameter. Local surface unevenness should be less than 2mm.

Transportation Guidelines for Anti-Corrosion Steel Pipes

Loading and Unloading: Use a hoist that does not damage the pipe mouth or the anti-corrosion layer. All construction machinery and equipment must comply with regulations during loading and unloading. Before loading, check the anti-corrosion grade, material, and wall thickness of the steel pipes to avoid mixed loading.

Transportation: Install a thrust baffle between the trailer and the cab. Secure the pipes firmly and take protective measures for the anti-corrosion layer. Place rubber sheets or other soft materials between the anti-corrosion pipes and the frame or columns, as well as between the pipes themselves.

Storage Standards for Anti-Corrosion Steel Pipes

Proper Storage: Steel pipes, fittings, and valves must be stored according to instructions and inspected regularly to prevent rust, deformation, and aging.

Dry Storage for Sensitive Materials: Materials like glass cloth, heat wrapping tape, and heat shrink sleeves should be stored in a dry, well-ventilated warehouse.

Classified Open-Air Storage: Steel pipes, fittings, and valves can be stored outdoors if classified properly. The storage site must be flat, stone-free, and without water accumulation. The ground slope should be 1%-2%, with drainage ditches.

Warehouse Stacking: Anti-corrosion pipes must be stacked in layers, ensuring the height does not compromise the pipes' stability. Stack them separately by specification and material, with soft pads between layers. Place two rows of sleepers under the bottom layer, and ensure the stacked pipes are >50mm from the ground.

On-Site Construction Storage: Pipes stored on-site require two supports at the bottom, spaced approximately 4m to 8m apart. The anti-corrosion pipes must be at least 100mm from the ground, with flexible isolation materials between the supports and the pipes, and between the pipes themselves.