SSAW Welded Pipe GB/T9711

GB/T9711 standard is Petroleum and natural gas industries—Steel pipe for pipeline transportation systems. Spiral welded steel pipe is made of the raw material of steel strip coil, formed to round shape by roll molding, automatic double submerged arc welding process to weld the seam, then the...

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GB/T9711 standard is Petroleum and natural gas industries—Steel pipe for pipeline transportation systems.

Spiral welded steel pipe is made of the raw material of steel strip coil, formed to round shape by roll molding, automatic double submerged arc welding process to weld the seam, then the pipe will be tested by UT, HT and other inspection to guarantee the quality.

Standard: GB/T 9711 , SY/T 5037 , SY/T5040,API 5L

Steel Grade:

 GB/T 9711: L175,L210,L245,L290,L320,L360,L390,L415,L450,L485,L555 SY/T 5037

 SY/T5040: Q235B,Q345B

 API 5L: A, B, X42, X46, X52, X56, X60, X65 X70

Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydraulic Test, X-ray Test. 

Pipe End: square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled,

Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy, Fusion Bond Epoxy, 3-layers PE)

Relevant Pipe Coating Standard:

 ANSI/AWWA 213 Fusion-Bonded Epoxy Coatings and Linings for Steel Water Pipe and fittings;  DIN 30670 External Polyethylene coatings for buried or submerged pipelines used in pipeline transportation systems. 

Application:

Used For Water, Sewage, Gas, Stream, Combustible Fluids(Petroleum and Gas) transmission.

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