API5L Line Pipe Specification
Process performance: 1. Flattening test Electric welded steel pipe, continuous furnace welded steel pipe and laser welded steel pipe should be flattened test. Whether it is necessary for seamless steel pipe Flattening test, not mentioned in the standard. 2. Bending test For steel pipes with a size of not more than 48.3mm, each batch of 25 tons or less than 25 tons is a batch, and for steel pipes with a size of 60.3mm Each batch of 50 tons or less of 50 tons is a batch of steel pipes, and one steel pipe is selected from each batch to take a full-section sample of appropriate length for bending test. Defect 1. The steel pipe shall not have a pit with a depth of more than 6.4mm. The depth of the pit shall refer to the lowest point of the depression and the extension of the original outline of the steel pipe. distance between points. The length of the pit in any direction should not exceed half the diameter of the steel pipe. 2. All cracks, seepage and leakage shall be considered as ...