Standard No.:	SY/T 5257-2004
English Name:	Steel bend for oil and gas transmission
Chinese Name:	油气输送用钢制弯管
Professional Classification:	SY    Professional Standard - Oil & Gas
Issued by:	NDRC
Issued on:	2004-7-3
Implemented on:	2004-11-1
Status:	superseded
Superseded by:	SY/T 5257-2012 Heating Steel Bend for Oil and Gas Transmission
Superseded on:	2012-12-1
Language:	English
File Format:	PDF
Word Count:	12000 words
Price(USD):	240.00
Delivery:	via email in 1 business day

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.

Foreword i
1 Scope 1
2 Normative References 1
3 Terms and Definitions 2
4 Symbols 4
5 Design Value of Bend 5
6 Information Provided by the Purchaser 5
7 Manufacture 7
8 Test and Inspection 11
9 Detection Documents 25
10 Marking 25
11 Bend Transportation, Storage and Protection 26