GB/T 9711.2 Spiral Welded Steel Pipe

Manufacturing procedures
The GB/T 9711.2 spiral welded steel pipe should be manufactured in the following steps. Firstly, the steel belts or plates should be molded. Secondly, the joint edging zone should be padded by metals and finally, the joints should be welded.

Materials
The GB/T 9711.2 spiral welded steel pipeis made of L245NB, L290NB, L360NB, L415NB, L360QB, L415QB, L450QB, L485QB, L555QB, L245MB, L290MB, L360MB, L415MB, L450MB, L485MBand L555MBsteel types.

Technical specifications
The maximum outer diameter for GB/T 9711.2 spiral welded steel pipe is 3048mm. The maximum wall thickness is 30 mm and the maximum length for a single pipe reaches 20000mm.

Applications
The GB/T 9711.2 spiral welded steel pipe is widely used in transferring combustible gas, including petroleum and natural gas.

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