Oil Country Tubular Goods are manufactured in steel mills that specialize in either ERW or SMLS tubular goods for the oil and gas industry.
What is ERW?
- ERW (Electric Resistance Weld) Pipe is made by shaping rolls of coiled steel and has a longitudinal weld seam.
What is SMLS?
- SMLS (Seamless) Pipe is made by heating and piercing a solid steel billet and piercing the pipe with a mandrel to create a tube. The desired length, Wall thickness and and OD are created by stretching and rolling of the steel tube.