Chiho Hebei Industry by 180 steel smelting method can be divided into open-hearth steel stamping elbow, converter steel, and electric furnace steel; by deoxygenation can be divided into boiling steel (F), killed steel (Z), semi-killed steel (b ) and special killed steel (TZ); according to carbon content can be divided into low carbon steel (WC ≤ 0.25%) welded elbow, carbon steel (WC0.25% -0.6%) and high carbon steel ( WC> 0.6%); as phosphorous, sulfur content can be divided into ordinary carbon steel, carbon steel (phosphorus, sulfur and higher), high-quality carbon steel (phosphorus, low sulfur) and high quality steel (phosphorus sulfur less) and premium quality steel. Pipe Co., Ltd. Hebei Chiho steel stamping elbow 90 degrees to production methods can be divided into pushing, pressing, forging, casting and so on. In manufacturing standards can be divided into GB welded elbow plant, electricity standard, ship standard, technology standard, water standard, American Standard, the German standard, Japanese standard, the Russian standard and so on. According to its radius of curvature to the point: it can be divided into long radius elbows and short radius elbows. Long radius elbow refers to its radius of curvature is equal to 1.5 times the outer diameter of the tube, that R = 1.5D; short radius elbow refers to its radius of curvature is equal to the pipe diameter, namely R = 1.0D. (D is the diameter of the bend, R is the radius of curvature). In terms of pressure levels to points: about seventeen species, and the US standard pipe is the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; one of the most common STD and XS are two kinds. Different shapes can be divided according to purpose: grooved elbow, elbow card sets, double socket elbows, flanges elbows, reducers elbow, elbow seat stay steel welded elbow, elbow and external teeth carbon steel stamping elbow American standard welded elbow, push the system elbow, socket elbow, welded elbow, female thread elbow. Japanese standards JIS B2311 standards Number Description Universal steel pipe fittings JIS B2312 steel pipe fittings JIS B2313 steel plate steel pipe fittings JIS B2316 socket welded carbon steel pipe fittings elbow _ _ welded elbow Hebei Chiho Chiho by Hebei Industry Co., Ltd. Hebei Chiho Pipe Co., Ltd. (www.hbqh628.com) (www.hbqh628.com) in forging this area devoted boundless enthusiasm and passion, Hebei Chiho has been customer-centric, for customers to create the concept of value, quality, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Yang Qinglong.