Thick wall welding tube

Thick wall  welding  tube production manufacturing process can be divided into cold drawing and cold rolling and hot rolling of three basic ways, the material of steel pipe for 10 #, 20 #, 35 #, 45 # called common steel, 16 mn between common steel and alloy steel pipe is called the low alloy steel pipe, steel pipe material for 27 simn, 12 cr1mov, 10 crmo910, 15 crmo, 35 crmo collectively known as the alloy steel pipe and stainless steel pipe. According to the purpose can be divided into structure with seamless steel tube; Delivery with seamless steel tube; Boiler seamless steel tube; Boiler with high-pressure seamless steel tube; Chemical fertilizer equipment with high-pressure seamless steel tube; Geologic brick, seamless steel tube; Brick of oil exploration in seamless steel tube; Seamless steel tube used in oil cracking; Shipping with seamless steel tube; Cold drawn cold rolled precision seamless steel tube; All kinds of alloy pipe.

API seamless steel pipe said method for outer diameter, wall thickness, thick wall seamless steel tube is mainly used in mechanical processing, coal mining, hydraulic steel, such as a variety of purposes. Classification of thick wall seamless steel pipe, hot-rolled thick wall seamless steel tube, cold rolling thick wall seamless steel tube, cold drawn thick-walled seamless steel tube, extrusion thick-walled seamless steel pipe, pipe jacking construction with stainless steel seamless steel tube (GB/T14975-1994) is widely used in chemical industry, petroleum, textile, medical, food, machinery and other industrial corrosion of pipeline and components and parts are made of stainless steel hot rolling (crowded, expanding) and cold drawing (rolling) seamless steel tube. Fluid conveying stainless steel seamless steel tube (GB/T14976-1994) is used for conveying fluid made of stainless steel hot rolling (crowded, expanding) and cold drawing (rolling) seamless steel tube.

Alien seamless steel tube is in addition to the outside of the pipe cross section shape of the floorboard of the API seamless steel tube. According to the size of steel pipe cross section shape is different and can be divided into such as wall thickness seamless steel tube (code-named D), ranging from wall thickness seamless steel tube (code-named BD), variable diameter seamless steel tube (code-named BJ). Alien seamless steel tube is widely used in all kinds of parts, tools and machinery parts. Compared with those of circular tube section tube usually have large moment of inertia and section modulus, have bigger bending torsional capacity, can greatly reduce the structure weight, save steel.