Spiral seam double-sided submerged arc welded steel pipe (SAWH)

SAWH螺旋缝埋弧焊钢管生产工艺流程图

Product main parameters (API SPEC 5L (46 version)):

Outer diameter deviation:

When the outer diameter of the steel pipe is 219.1≤D≤610mm:

The outer diameter deviation within 100mm of the pipe end: ±0.005D, ** is ±1.6mm; the outer diameter deviation of pipe body: ±0.0075D, ** is ±3.2mm.

When the outer diameter of the steel pipe is 610＜D≤1422mm:

The outer diameter deviation within 100mm of the pipe end: ±1.6mm; the outer diameter deviation of the pipe body: ±0.005D, ** is ±4.0mm.

When the outer diameter of the steel pipe is D>1422mm, it is agreed.

Ovality deviation:

When the outer diameter of the steel pipe is 219.1≤D≤610mm:

Ovality deviation within 100mm of tube end: 0.015D; tube ellipticity deviation: 0.020D.

When the outer diameter of the steel pipe is 610＜D≤1422mm:

Ovality deviation within 100mm of tube end: 0.01D, ** is 13mm; tube ellipticity deviation: 0.015D, ** is 15mm.

When the outer diameter of the steel pipe is D>1422mm, it is agreed.

Wall thickness deviation:

When the wall thickness is t＞5.0mm:

Wall thickness deviation: ±0.1t, ** is ±1.5mm.

Straightness deviation:

The total deviation of the total length of the steel pipe relative to the straight line should be ≤0.2% of the length of the steel pipe, and the local deviation of the steel pipe within the 1.5m length of each pipe end relative to the straight line should be ≤3.2mm.

Length range:

Length: 8~22m.

If customers have higher requirements for quality, they can be negotiated.

Product nominal outer diameter and nominal wall thickness range table: