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Steel Bend for Oil and Gas Transmission
1 Scope
This standard specifies the technical specifications for delivery of bends made of seamless carbon steel and low alloy steel pipes and welded steel pipes by induction bending process used in the oil and gas pipeline transmission system.
This standard specifies the three grades of induction heating steel bends in Table 1 according to GB/T 9711 series of standards; their mother pipes meet the fundamental quality requirements for technical specifications of steel pipe delivery in GB/T 9711 and other additional quality requirements.
The mother pipes shall not only meet other steel pipe standards than GB/T 9711 but also must ensure the equal bearing capacity, with quality requirements and classification method by agreement.
Table 1 Induction heating steel bends classification and relevant steel pipe standards
Steel bend classification Relevant steel pipe standards
Grade A GB/T 9711.1
Grade B GB/T 9711.2
Grade C GB/T 9711.3
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies. |
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