ASTM A333 GR.4 SCH40 2 Inch 12m Length CS Seamless Pipe With Beveled Ends

ASTM A333 GR.4 SMLS Pipe, SCH 40, 2 Inch, 12 Meters, Black Coating Surface, Beveled Ends.

Carbon steel pipe can be divided into seamless steel pipe, straight seam steel pipe, spiral steel pipe, high frequency welded steel pipe and so on. The raw material of rolling seamless carbon steel pipe is round tube billet. The round tube embryo must be cut by cutting machine to process the billet with a growth degree of about 1 meter, and sent to the furnace by conveyor belt for heating. The billet is heated into the furnace at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key problem. After the round tube billet is out of the oven, it must pass through the pressure perforation machine to carry on the empty. The common perforator is conical roller perforator, which has high production efficiency, good product quality, large perforation diameter expansion and can wear many kinds of steel. After perforation, the round tube billet has been three-roll oblique rolling, continuous rolling or extrusion. After extrusion, take off the pipe and set the diameter. The diameter fixing machine rotates into the steel embryo through the conical bit at high speed to form the steel pipe.

Also GB/T17396-1998( hot rolled seamless steel tubes for hydraulic supports),GB3093-1986( High Pressure Seamless Steel Pipe for Diesel Engines), GB/T3639-1983( Cold-drawn or Cold-Rilled Precision Seamless Steel Pipe),GB/T3094-1986( cold-drawn seamless steel tube (special-shaped steel tube), precision inner diameter seamless steel tube GB/T8713-1988( hydraulic and pneumatic cylinders),Stainless Steel Seamless Steel Pipe for GB13296-1991( Boiler, Heat Exchanger), pipe for GB/T14975-1994( structures),stainless steel seamless steel pipe for GB/T14976-1994( fluid transportation) GB/T5035-1993( seamless steel pipe for automotive half shaft casing), API SPEC5CT-1999( casing and tubing specification), etc.

Cold drawn (rolled) carbon steel seamless steel pipe: pipe billet → heating → perforation → head → annealing → pickling → oiling (copper plating), multi-pass cold drawing (cold rolling)→ billet pipe heat treatment → straightening water pressure test (flaw detection)→ marking and storage
Carbon steel seamless steel pipe is divided into hot rolled (extruded) seamless steel pipe and cold drawn (rolled) seamless steel pipe because of its different manufacturing technology. Cold drawing (rolling) tube is divided into circular tube and special-shaped tube.