GB/T 21832.1-2018: Translated English of Chinese Standard. (GBT 21832.1-2018, GB/T21832.1-2018, GBT21832.1-2018): Welded austenitic-ferritic (duplex) stainless steel tubes and pipes -- Part 1: Tubes for heat exchanger
https://www.chinesestandard.net, Aug 22, 2018 - Technology & Engineering - 16 pages
This Part of GB/T 21832 specifies the ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certification for welded austenitic-ferritic (duplex) stainless steel tubes for heat exchangers. This Part applies to welded austenitic-ferritic (duplex) stainless steel tubes for heat exchangers.
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Packaging marking and quality certification
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accordance with Formula agreed allowable deviations allowed by wall analysis of iron austenitic content Back bend batch GB/T Brinell hardness test butyl acetate chemical analysis compositions of steels contracts Designations and chemical deviations of outer diameter and wall diameter not greater diameter of steel dimensions dimethylglyoxime eddy current testing Flanging test Flattening test free from cracks heat treatment systems Hydrostatic pressure hydrostatic test Infrared absorption method inspected and accepted Iron Steel items of steel length of steel Metallic materials Metallographic structure method after combustion Methods for chemical minimum value allowed molybdenum out-of-roundness perchloric acid purchaser Quenching Quenching Quenching Rockwell hardness test sample separately taken Sampling quantity sodium thiosulfate specified in GB/T specified in Table stainless steel steel and alloy Steel and iron steel tubes supplier test GB/T test items test pressure theoretical weight thickness of steel tubes for heat Vickers hardness test wall thickness welded austenitic-ferritic duplex welded joints