... 2.Logo:changhao,china 3.Model:1/4''-4'' pipe plug Shanghai Chanhao High Pressure Pipe Co., LTD is specialized in ... high-pressure pipe manufacturers, the products have forged flanges, elbows, three different-diameter pipe(size head),insulation joints, insulating flange and ... forging system for plug-ins, threaded pipe fittings and high pressure, such as ...