General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 21835-2008
Scope
This standard specifies the nominal size and weight per unit length of welded steel pipes. This standard is applicable to the selection of nominal size and weight per unit length when formulating standards for round flat-end welded steel pipes for various purposes.
GB/T 21835-2008 Referenced Document
GB/T 20878-2007 Stainless and heat-resisting steels Designation and chemical composition
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values*, 2008-07-16 Update
GB/T 21835-2008 history
2008GB/T 21835-2008 Dimensions and masses per unit length of welded steel pipes