The production process of seamless elbow

After perforation, circular tube billet has been three-roll skew rolling, rolling or extrusion. To take off after extruding tube sizing and sizing mill by taper drill bits high-speed steel into embryo punch, form fitting. Pipe diameter by sizing mill bit length to determine the diameter. Pipe after sizing, into the cooling tower, by water spray cooling, pipe after cooling, will be straightening. Pipe by the conveyor belt to the metal detection after straightening machine (or water pressure experiment) for internal inspection. If the steel pipe internal crack, air bubble, will be detected. Seamless elbow pipe fittings quality through rigorous after manual pick. Seamless elbow pipe fittings quality inspection, after spray paint on the serial number, specification, batch number, etc. Seamless elbow and by crane into the warehouse.

Source: Yaang Pipe Industry Co., Limited (www.yaang.com)