What Is LSAW Pipe?

LSAW (Longitudinally Submerged Arc Welding) pipe is made of steel plate as that were hot rolled by JCOE or UOE forming technology. The finished products of L SAW pipes have a wide range of specifications, whose weld seam has good toughness, plasticity, uniformity and compactness. LSAW welded steel pipe can be used in onshore and offshore oil and gas pipe lines requiring critical service, high performance and tight tolerances. LSAW steel pipes also can be used in flammable & nonflammable liquids conveyance, and as a structural member in construction projects.

LSAW Steel Pipe Manufacturing Process:

Plate Probe — Milling — Pre-Curved Side— Forming — Pre-Welding — Inside Weld — Outside Weld —  Ultrasonic Testing — X-Ray Inspection — Expansion — Hydraulic Test — Chamfering

Features of LSAW Pipe:

- Large diameter

- Thick wall
- High pressure resistance
- Low temperature resistance

Application of LSAW Pipe:

low pressure liquid transmission

high pressure petroleum transmission

natural gas transmission

structural supports and foundations

Chemical industry

electric power

irrigation

construction and piling

etc.

Standards

GB/T700-2006 Gr A, Gr B, Gr C, Gr D

GB/T1591-2009 Gr A, Gr B, Gr C

BS EN10025 S235JR, S275JR, S355JR

DIN 17100 ST37-2, ST44-2, ST52-2

JIS G3101 SS400, SS490

API 5L PSL1 Gr A, Gr B, X42, X46, X52, X56, X60, X65, X70