LSAW pipe is longitudinal submerged arc welded pipe, normally formed from steel plate and welded along one longitudinal seam. It is often selected for large diameter, heavy wall and high strength line pipe or structural projects.

Which standards are common for LSAW pipe?

Common references include API 5L and ISO 3183 for line pipe, ASTM A671 or ASTM A672 for electric-fusion-welded pipe, and EN 10217 or EN 10219 for welded pressure or structural applications.

What should be confirmed for coating and inspection?

Confirm bare, black, FBE, 3LPE, 3LPP, internal epoxy or cement mortar lining, plus hydrotest, UT, RT, dimensional checks, bevel inspection, coating holiday test and MTC requirements.

What details are needed for an LSAW RFQ?

Provide standard, grade, outside diameter, wall thickness, length, forming route if specified, end bevel, coating or lining, test scope, MTC, packing, quantity and destination port.

Line Pipe & Piling

LSAW & Submerged Arc Pipe

Large diameter longitudinal submerged arc welded pipe for line pipe, water transmission, piling and structural projects.

Product Overview

Large diameter SAW pipe for controlled project supply

Himount supplies LSAW and SAWL pipe for oil and gas line pipe, water transmission, piling, offshore support, structural pipe and heavy project supply. Each order is checked by standard, grade, diameter, wall thickness, plate route, weld inspection, hydrotest, bevel, coating, lining, MTC and project ITP requirements.

API 5LLine pipe project standard

SAWLLongitudinal submerged arc weld

X65Common high-strength grade

3LPECommon external coating

Large diameter submerged arc welded pipe ends

Key Specifications

Product formsLSAW pipe, SAWL pipe, DSAW pipe, large diameter line pipe, water transmission pipe, piling pipe, structural pipe and coated project pipe.

Primary standardsAPI 5L, ISO 3183, ASTM A671, ASTM A672, EN 10217, EN 10219, GB/T 9711 and project specifications for longitudinal submerged arc welded pipe.

Common gradesAPI 5L Gr.B, X42, X52, X60, X65, X70, PSL1 or PSL2, ASTM A671/A672 classes, S355, Q355 and project-specified plate grades.

Manufacturing routeJCOE, UOE or roll bending route from steel plate, longitudinal submerged arc welding, inside and outside weld, expansion, hydrotest and full inspection by order.

Size and end finishLarge OD and heavy wall ranges by project; confirm OD, wall thickness, length, straightness, bevel angle, root face, end squareness and pipe end protection.

Coating and testingBare, black, FBE, 3LPE, 3LPP, internal epoxy or cement mortar lining; UT, RT, hydrotest, dimensional inspection, weld inspection and coating holiday test by project.

Order detailsConfirm standard, grade, PSL, OD, wall, length, forming route, bevel, coating, lining, test scope, MTC, ITP, marking, packing and destination port.

Typical Applications

Where LSAW pipe is specified

Oil and gas line pipeTransmission pipelines, gathering lines, high-strength line pipe packages and project pipe where API 5L grade, PSL and inspection scope are controlled.

Water and slurry pipelinesLarge diameter water transmission, desalination, slurry, utility and municipal projects requiring coating, lining and pressure test documentation.

Piling and structural useMarine piles, bridge works, heavy structural pipe, port projects and foundation packages requiring large diameter and heavy wall supply.

Line pipe note

For API 5L or ISO 3183 projects, confirm PSL, supplementary requirements, toughness, sour service needs, weld NDT, hydrotest and project ITP before quotation.

Coating note

Large diameter pipe coating changes handling and delivery. Confirm FBE, 3LPE, 3LPP, internal lining, cutback, holiday test and pipe end protection early.

International Model Search Index

Common standards, grades and RFQ terms

Standards and grade calls

API 5L X65 LSAW pipeAPI 5L X70 SAWL pipeISO 3183 L450 pipeASTM A671 EFW pipeASTM A672 high pressure pipeEN 10219 S355 LSAW pipeGB/T 9711 LSAW line pipe

Size and order phrases

large diameter pipelongitudinal submerged arc welded pipeJCOE LSAW pipeUOE line pipebeveled end LSAW pipe3LPE coated pipeFBE coated line pipe

Buyer search phrases

LSAW steel pipe supplierSAWL pipe exporterAPI 5L X65 LSAW pipelarge diameter welded pipe3LPE coated LSAW pipesubmerged arc welded pipe

Buyer FAQ

Questions to settle before quotation

What is LSAW pipe?

LSAW pipe is longitudinal submerged arc welded pipe, normally formed from steel plate and welded along one longitudinal seam for large diameter or heavy wall projects.

Which standards are common?

Common references include API 5L and ISO 3183 for line pipe, ASTM A671 or A672 for electric-fusion-welded pipe, and EN 10217 or EN 10219 for welded pressure or structural use.

What should be confirmed for coating?

Confirm bare, black, FBE, 3LPE, 3LPP, internal epoxy or cement mortar lining, plus cutback, holiday test, end protection and handling requirements.

What information is needed for RFQ?

Provide standard, grade, PSL, OD, wall thickness, length, forming route if specified, bevel, coating or lining, test scope, MTC, ITP, packing and destination port.

Other products in Line Pipe & Piling

Seamless Carbon & API 5L Line Pipe ERW Carbon Steel Pipe SSAW, Spiral Welded & Piling Pipe

Send RFQ for LSAW & Submerged Arc Pipe

Share standard, grade, PSL, OD, wall, length, bevel, coating, test scope, MTC, ITP and destination details.

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