Stud Bolt and Nut, Copper Pipe Tube, Spiral Wound Gasket manufacturer / supplier in China, offering LPG/Hpg Type F/E/D Isolating Flange Gasket for Oil and Gas Pipeline Service, Ss Mcg G7/G10/G11 Flange Insulating Kit Gasket for Gas Industry Pipeline Service, Mcg Ss Core Flange Insulating Gasket for Flange/Pump/Valve and so on.