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Spiral Steel Pipe Erw Pipe Coating Pipe Thermal Insulation Steel Pipe

Spiral Welded Pipe For Heating

Taxonomy:Spiral Steel Pipe

Product number:A008

Shelf time:2014-07-08

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Product introduction

Product Name: spiral welded pipe for heat supply

Standard: CJT 3022-1993

Steel grade: Q235B

Specifications: 820 x 12 x 12000mm

Technical requirements:

Outer diameter deviation: tube body is less than or equal to 0.75%D; pipe ends are less than or equal to 0.50%D or 3.5mm, take a small value.

The thickness deviation is less than or equal to 0.1t.

Ellipticity: the maximum outer diameter is less than 1%D, and the minimum outer diameter is less than 1%D in the 1000mm length range of the pipe ends.

Length deviation: +/- 50mm;

Straightness: the full length of the steel pipe is less than 0.2%L.

Slant: less than 2mm;

Groove angle: 30 degree -35 degrees;

Blunt edge: 1.6 + /-0.8mm;

Outer weld height: less than 4.0mm;

Internal weld height: less than 4.0mm;

The hydrostatic test pressure is more than 4.1MPa, the time of stabilizing is more than 20s.

NDT: 100% weld length RT.

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JingLan(Tianjin) Technology Co., Ltd.