Dimensions of welded steel pipes
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The dimensions of welded steel pipes are also specified by the 20553 standard, right? The manufacturing inspection standard uses 3091, right! Could someone please let me know!
The specific specifications depend on which type you need. 20553 is also divided into Series I and Series II; it depends on which one you choose.
The domestic standard system is extensive and complex, with some aspects being rather confusing. I checked, and there are so many standards for welded steel pipes, with specifications set for their dimensions. GB/T3091 specifies the dimensions, shape, weight, technical requirements, testing methods, inspection rules, packaging, marking, and quality certificates for welded steel pipes used for low-pressure fluid transportation. GB/T21835 specifies the nominal dimensions and weight per unit length of welded steel pipes. GB/T28708 specifies the size series and theoretical mass of seamless and welded carbon steel, alloy steel, and stainless steel pipes used in pipeline engineering. HG/T20553 is applicable to the selection of steel pipe sizes in the construction of new, renovated, or expanded chemical engineering projects.
Thank you, senior on the third floor. Is there a standard version available for download for learning?