My company elbow process brief introduction

My company elbow process brief introduction

Carbon steel seamless elbow is used in the elbow is a common material, cheap, easy to use.According to the material is divided into: low carbon steel, medium carbon steel, high carbon steel,20 steel (20G), Q23, Q235B, and is divided into hot rolled (extrusion) seamless elbow pipe fittings and cold drawn (rolled) seamless elbow pipe fittings two.Cold drawing (rolling) pipe is divided into circular pipe and special-shaped pipe two.The raw material of rolling seamless elbow pipe fittings is round tube billet, which is cut by cutting machine and processed into billet with a length of about one meter, and sent to furnace for heating by conveyor belt.The billet is fed into a furnace to be heated at a temperature of about 1200 degrees Celsius.Temperature control in furnace is the key problem.After the round tube billet is released, it must be perforated by pressure punch.It is characterized by relatively high carbon content;According to the standard is divided into: national standard, non-standard, according to the customer's standard: German standard, Japanese standard, American standard, British standard elbow.The raw material of carbon steel seamless elbow is seamless steel pipe, and the main production process is round tube billet → heating → perforation → three-roll cross rolling, continuous rolling or extrusion → tube stripping → sizing (or reducing) → cooling → straightening → hydraulic test (or inspection) → marking → storage.SCHXX is the wall thickness, and 90E (S) represents the carbon steel head with a short radius of 90 degrees;90E (L) represents an elbow with a long radius of 90 degrees;45E (L) represents an elbow with a long radius of 45 degrees;45E (s) represents an elbow with a short radius of 45 degrees;180E (S) for carbon steel elbow with short radius of 180 degrees;180E (L) for long radius 180 degree elbow;Carbon steel elbow is to change the carbon steel pipe on the line.(1) The butt welding elbow can be divided into long radius butt welding elbow and short radius butt welding elbow according to its radius of curvature.The radius of curvature of the long radius butt welding elbow is equal to 1.5 times the outside diameter of the pipe, i.e. R=1.5D.The radius of curvature of the butt welding elbow of the short radius is equal to the outer diameter of the pipe, i.e. R=1D.Where, D is the diameter of butt welding elbow, and R is the radius of curvature.

The caliper is drilled into the steel blanks through a tapered bit with high speed rotation to form pipe fittings.The back arc thinning of seamless elbow has always been an unsolvable problem. The other method is to increase the thickness of billet, but the result of doing so is to increase its cost.The current elbow whether carbon steel seamless elbow or high pressure seamless elbow, the most used skill is to push the system, this skill is characterized by large output, fast factory speed, elbow produced is also beautiful.And the production of the original elbow is full of old thick stamping, this way has been continued for many decades, that is, now many customers are still called elbow for stamping elbow.The surface quality and mechanical properties are basically the same as the pipe.For ease of welding, the fittings are of the same type of steel as the pipes to be connected.Is that all the pipe fittings should be surface treatment, the inner and outer surface of the oxide sheet through spraying treatment, and then coated with anticorrosive paint elbow is the pipe fittings to change the direction of the pipeline.Elbows account for a large proportion, about 80%, in all pipe fittings used in the piping system. Usually, different forming processes are chosen for elbows of different materials or wall thicknesses.At present, manufacturers commonly used seamless elbow forming process are hot push, stamping, extrusion and so on.According to the Angle points, there are 45° and 90°180° three commonly used, our company produces stamping elbow, stainless steel stamping elbow, carbon steel stamping elbow, alloy stamping elbow, 45 degrees stamping elbow, 90 degrees stamping elbow, 180 degrees stamping elbow and other materials of stamping elbow.At the same time also the production of stainless steel elbow, large diameter bend, arc Angle, gb punching elbow, elbow stamping welding elbow, such as diameter, reducing elbow, seamless elbow, elbow push system, high pressure elbow, wear-resistant elbow, carbon steel elbow, thick-walled elbow, stamping elbow, butt welding flange, elbow, tee, four-way reducer series and other products.Welcome new and old customers to con