Longitudinal submerged arc welded pipe can express as LSAW steel pipe. LSAW steel pipe, a type of longitudinally welded steel pipe produced by using the double sided submerged arc welding method.

longitudinal submerged arc welded pipe

Longitudinal submerged arc welded pipe definition

Longitudinal Submerged Arc Welded  pipe can express as LSAW steel pipe. LSAW steel pipe, a type of longitudinally welded steel pipe produced by using the double sided submerged arc welding method. LSAW steel pipe are welded tubular products made out of flat plates that are formed, bent and prepared for welding. LSAW are welded with a straight seam that runs length wise across the pipe.

LSAW steel pipe weld seam is straight
LSAW steel pipe weld seam is straight

Longitudinal submerged arc welded pipe manufacturing process

LSAW Steel Pipe manufacturing flow chart:

Plate UT – Vacuum Lifting – Ultrasonic Inspection – Edge Milling – Pre Bending – Type J Forming – Type C Forming – Type O Forming – Tack Welding By CO2 Gas Shield Arc Welding – Tab Welding – Inside Welding – Outside Welding – Removal of Tab Plate – Cleaning – Rounding – X Test – Ultrasonic Testing – Washing Before Expansion – Mechanical Expansion – Washing After Expansion – Straightness – Hydrostatic Test – Ultrasonic Testing – Weld Grinding for Pipe Ends – Mechanical Facing – X Ray Test for Body and Both Ends – Ultrasonic Testing for Pipe Ends – Magnetic Particle Inspection For Both Ends – Weighing and Measuring Length – Product Inspection – Outside Coating – Inside Coating – Marking – Packing and Warehousing.

longitudinal submerged arc welded pipe seam
longitudinal submerged arc welded pipe seam

Scope of Longitudinal submerged arc welded pipe

LSAW steel pipe applied to dimension:

Outside diameter: from 16 in (406.4 mm) to 56 in (1422.2 mm).

Wall thickness from 6.0mm to 40.0mm.

Length: 3m – 15m

Longitudinal submerged arc welded steel pipe Steel Grade

Common Class: API 5L Gr.B PSL1, PSL2, Sour Service pipe

Medium: X42, X46

Medium: X52

Medium and high: X56

High level: API 5L X60 PSL1, PSL2 LSAW steel pipe

High: API 5L X65 PSL1, PSL2 LSAW/SSAW line pipe

Premium high: API 5L X70

Premium high: API 5L X80

Usage of Longitudinal submerged arc welded pipe

LSAW Steel Pipe are use in onshore and offshore oil and gas pipelines requiring critical service. LSAW steel pipe are commonly used in high pressure oil and gas pipelines because of their shorter welded seams and easier serviceability. These pipes are commonly required for sections of a pipeline that extend across areas with high population o building sensity or involve sub-sea applications.

Usage of Longitudinal submerged arc welded pipe
Usage of Longitudinal submerged arc welded pipe

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