I want to purchase some straight-seam welded pipes with dimensions of 1270*25, made of material Q235. How should the inspection and acceptance criteria be formulated?
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I want to purchase a section of straight-seam welded pipe with dimensions 1270*25, made of material Q235. How should the inspection and acceptance criteria be formulated? It can be made from steel plates rolled into tubes, and it needs to be able to withstand a pressure of 20 kilograms
Which pipeline design standard is being used? Indicating the year of the design standards and material standards is generally sufficient. This includes the two-sided port format you requested, metal pipes; the pressure rating is rarely specified, and it is usually indicated as outer diameter + wall thickness.
This post was last edited by niat8888 on 2015-12-31 07:58. It seems there are no product standards. . . It has to be done this way: Weld the steel pipe with dimensions φ1270*25 and a length of L=XXXX mm. Specify the material standard, material grade, inspection method, inspection ratio, and the acceptable quality level. If necessary, add tolerance requirements such as thinning amount, ovality, outer circumference length, as well as requirements for end face bevels. I recommend at least Q235B. . The quality of Q235A is too poor. .