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1 Scope PREFIX = O
This part of GB/T 9711 specifies the technical delivery conditions for unalloyed and alloyed (except stainless) seamless and welded steel pipes. It includes quality and testing requirements overall higher than those specified in GB/T 9711.1. This part of GB/T 9711 applies for pipes which are normally used for the transmission of combustible fluids. It is not suitable for cast steel pipes.
2.Normative Reference1]
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis
GB/T 223.5-1997 Methods for chemical analysis of iron, steel and alloy The reduced molybdosilicate spectrophotometric method for the determination of acid-soluble silicon content
GB/T 223.9-1989 Methods for chemical analysis of iron, steel and alloy－The chrom azurol S photometric method for the determination of aluminium content
GB/T 223.12-1999 Methods for chemical analysis of iron, steel and alloy The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content
GB/T 223.14-1989 Methods for chemical analysis of iron, steel and alloy－The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
GB/T 223.16-1991 Methods for chemical analysis of iron, steel and alloy The chromotropic acid photometric method for the determination of titanium content |
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