LSAW Steel Pipes

Longitudinal submerged arc welded pipe is formed from steel plate and welded along one straight seam. This process produces large-diameter pipe considered for engineered piling, transmission, structural and industrial projects.

The project specification determines which LSAW pipe to use. It should define the material and dimensions, protection, pipe ends, testing and inspection documents.

Compare LSAW and SSAW pipe against the project specification.

Start with the engineer’s specification. Diameter alone cannot establish whether the pipe meets the project’s material, protection, testing and installation requirements.

Standard and grade

Use the project specification for the standard, grade and mechanical properties. Water transmission also needs the governing AWWA or project requirements and pressure class.

OD, wall, and length

State the required outside diameter, wall thickness, length, quantity, tolerances, and end preparation.

Coating and testing

Coordinate lining or coating, weld inspection, testing, handling and installation. For marine and infrastructure work, include corrosion protection and long-term inspection.

Use the steel pipe standards guide alongside the project specification.