Process: LSAW, SSAW, ERW, SMLS The coating will be as per the customer's requirements such as FBE, PE, PP etc. The largest OD of seamless pipe will be up to 20" . s used for oxygen, water, and oil delivery pipe in oil and natural gas industry: Standards: API 5L Grade: A, B, X42, X46, X52, X60, X70, X80 Size: 2 3 8"--70"