Types of Oil & Gas Pipes: Seamless, ERW, LSAW ...
LSAW pipes compete with seamless and ERW pipes in the size range between 16 and 24 inches but are "must-go" options for pipelines above 24 inches (as 24 inches is the maximum size for commercial seamless pipes). The two main types of LSAW pipes are the longitudinal (with a single or double straight seam weld, DSAW) and the spiral type ...