... can be divided into: welding elbow, stamping elbow, hot pressing elbow, pushing the elbow, casting, forging the ... directly (the most commonly used methods), flange connection, hot melt connection, fused connection, thread connection and the plug-in ... Sch5S-Sch80S, Sch10-Sch160, XS-XXSProduction ProcessingCold Forged or Hot ForgedPackingshrink wrapped - carton - pallet SurfaceWhited,Plain,ZpHdg and ...