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Product Name: pipeline for oil and natural gas transmission
Standard: GB/T9711-2011 PSL1
Steel grade: X52/L360
Specifications: 820 x 12 x 12000mm
Outer diameter deviation: tube body is less than or equal to 4.0mm; pipe end is less than or equal to 1.6mm.
The thickness deviation is less than or equal to 0.1t.
Ellipticity: tube body is less than 12mm, pipe end is less than 8.2mm.
Length deviation: +/-50mm;
Straightness: the full length of the steel pipe is less than 0.2%L; it is less than 4.0mm in the 1m length of each pipe end.
Slant: less than 1.6mm;
Groove angle: 30 degree -35 degrees;
Blunt edge: 1.6 + /-0.8mm;
Outer weld height: less than 3.5mm;
Internal weld height: less than 3.5mm;
The hydrostatic test pressure is more than 9.5MPa, the time of stabilizing is more than 10s.
NDT: 100% weld length RT.