Profile: Plymouth is a global supplier of steel tubing specializing in seamless carbon steel tubing, seamless cold drawn low carbon steel tubing, seamless alloy steel boiler & superheater tubing, ERW carbon steel tubing, seamless carbon and alloy tubing, cold drawn seamless ProMoly (4130) mechanical tubing, J-525 hydrabrite low carbon tubing, special shapes, seamless alloy boiler tubing, sea-cure tubing, xtra low stress welded stainless steel feedwater heater tubes, welded and drawn stainless steel aircraft tubing.