SSAW Pipe

　　API tubing pipeline, generally speaking, would be focus on seamless steel pipe . With its special characters, we will use them for the transmission of oil & gas with standard of API 5CT J55/K55/N80/C75/L80/C90/T95/Q125. 　　With special function for API 5L steel tube, we will still need to focus on the follow factors for the guarantee of the quality of it. 　　First of all, treatment for pipe end. In general, there are square, beveled for welding ends and NUE/EUE connection. And for square end, it could range from straight cut, saw cut to torch cut. 　　In addition, for surface dealing. High quality API 5L steel pipeline may go through lightly oiled, hot dip galvanized, varnish coating/anti rust oil, protective coatings and so on. 　　What’s more, tests such as chemical component analysis, mechanical properties and technical property are necessary for quality insurance. 　　Finally, we cannot ignore the packing methods. We will adopt ways of protection caps in both end, waterproo...

　　API 5L steel pipe would be applied among the areas of fluid transportation steel pipe-preferred in long pipelines due to inexpensiveness, oil and gas. No matter which kind of industry needs it, we should make different test for seamless or ERW steel pipe before the purchase. 　　Here is the main types of the test for API 5L line pipe: 　　Hydrostatic test: This test would give guarantee for leakage problem from testing the weld seam or the pipe body. Jointers need not be hydrostatic tested provide the pipe sections used were successfully tested. 　　Bend test: No cracks shall occur in any portion of the test piece and no opening of the weld shall occur. 　　Flattening test: Acceptance criteria for flattening test shall be: 　　EW pipes D<12.750 in: 　　X60 with T 500in. There shall be no opening of the weld before the distance between the plates is less than 66% of the original outside diameter. For all grades and wall, 50%. 　　For pipe with a D/t > 10, there shall be no openi...