... :1/4''-4'' pipe plug Shanghai Chanhao High Pressure Pipe Co., LTD is specialized in producing and marketing high-pressure pipe manufacturers ... , insulating flange and forging system for plug-ins, threaded pipe fittings and high pressure, such as various types of pipe ... fittings, can be GB,HG,JB,SY,HGJ,SH,ASME,ANSI, ...