There are flat welding blue, loose flanges, stainless steel flanges, carbon steel flanges, ANSI flange, JIS flange flange, forged size overall diameter welded. Welding and pressure vessel flange, products national standard, American standard, Japanese standard, as well as non-standard products. [Series] has elbow, seamless elbow, butt welding elbow, high elbow, American Standard elbow. [Series] has diameter pipe, seamless pipe diameter, welded reducer, concentric reducer, eccentric reducer, non-standard, American standard and so on. [Series] has tee, seamless Tee, Butt Tee, GB United States and other standard. [Series] has elbow, hot simmer seamless pipe, seamless pipe and other cold-simmer.