... root pass, fill, and cap pass Automatic Elbow Welding MachineSuitable for industries of: OIL AND GAS, REFINERY FACILITIES, OFFSHORE &SHIPBUILDING, POWER ... , CNCEC, etc.Features:1. Zero-balance weight design2. Suitable for pipes from O. D. 2" to 48"3. TIG/MIG/SAW are ... , WPS programmed6. More than 99% qualified first X-ray test.For more information, please feel free to contact us. Thank you!