Hot Tapping Machine, Pipe Cutting Machine, Flange Adaptor manufacturer / supplier in China, offering Tdw 36′ ′ ANSI #600 ASME B31.4 Serrated RF Flange Hydraulic Sandwich Valve, High Quality Stopple Fitting for Hot Tapping and Plugging, 1450psi Automatic Feeding Hydraulic Hot Tapping Machine for Oil and Gas Lines and so on.