The national standard prescribed the product classification, dimension, shape, weight, technical requirement, testing method, regulations of acceptance, packing, label and quality certificate for longitudinal electric resistance welded steel tube.
The national standard is suitable for different kinds of structural members, parts and conveyance fluid pipes and electric resistance welded steel tubes for other purposes.
2 Cited standards
GB 222 The sampling method for steel chemical analysis and allowable deviation for chemical analysis of finished products
GB 223 Methods for chemical analysis of iron, steel and alloy
