Longitudinal submerged arc welded (LSAW) tubes are manufactured by bending and molding steel plate and then joining the edges using a double-sided submerged arc weld. They are commonly used in the oil and gas industry for long-distance hydrocarbon transport pipelines.
Olympus Longitudinal Submerged Arc Weld (LSAW) Inspection System
Olympus’ LSAW high-performance tube and weld inspection solution uses ultrasonic phased array probes integrated into fully automated testing systems to meet stringent requirements for weld-volume inspection. The LSAW system helps manufacturers ensure the quality of longitudinal submerged arc welded tubes and can be adapted to meet the varying needs of oil country tubular goods (OCTG) manufacturers.
LSAW Pipe Inspection Requirements
The LSAW system is built to comply with international standards governing pipe manufacturing inspection requirements. It inspects 100% of the weld volume in line pipes ranging from 304.8 mm to 2032 mm (12 in. to 80 in.) OD, in addition to the heat affected zone (HAZ).
- Longitudinal and transverse cracks (up to 3 mm (0.12 in.) ID and OD for each side)
- Lack of fusion, lack of penetration, and penetrators according to the wall thickness (DEP standard*)
- Lamination defects in the HAZ (up to 75 mm (3 in.) for each side of the weld)