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LSAW pipes, Longitudinally Submerged Arc Welded Steel pipes

LSAW pipes, Longitudinally Submerged Arc Welded Steel pipes


Equipment of Longitudinally Submerged Arc Welded and UOE

LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.The coherence of cutter head and plate clamping system guarantees the invariable parameters during the entire milling process; accordingly it ensures the milling quality and lays a good foundation for the success of subsequent welding.

Usage of LSAW steel pipes:

  • LSAW Steel Pipe For Oil & Gas pipeline
  • LSAW Steel Pipe For Construction
  • Roller Pipe


  • API Spec 5L
  • ASTM A252-89, ASTM 53
  • EN10217, EN10219
  • GB/T9711.1,GB/T9711.2 or BS, JIS, IS

Steel grade

  • API 5L: GR A, GR B, X42, X46, X56, X60, X65, X70
  • ASTM A252 GR 1, GR 2, GR 3
  • ASTM A53: GR A, GR B, GR C, GR D
  • BS 4360: Grade 43, Grade 50
  • EN: S275, S275JR, S355JRH, S355J2H


  • API 5L PSL1,PSL2 , API 5CT, ISO ,CE,EN 10204/3.1B
  • ISO9001:2008, ISO14000:2004

Size range by usage:

Usage O.D.(mm) W.T.(mm) Length(m)
Oil &gas pipeline  406-1524  6-40  8-12.1
for Construction  350-1600  6-60  6-12
Roller pipe  1200-3800  12-120 <=3.2

In addition to above specification, the pipes can be produced according to customer’s requirements.

Pipe Coating:

Coating mills apply pipe coatings to protect the line pipe from corrosion.

  • HDPE: High-density polyethylene jacket pipe
  • 3PE/2PE: PE anti-corrosion pipe three-tier structure
  • 3PP/2PP: PP three-tier structure of anti-corrosion pipeline
  • Pipe cement mortar lining

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