Hebei seamless elbow belongs to a pipe, seamless pipe fittings are our specialty Hebei, Hebei seamless extension to do the best Thai elbow, Hebei is the largest manufacturer of seamless elbow, "study, and beyond, leading" is the company's entrepreneurial spirit, we will be more sincere commitment to honor tube industry, welcome to leaders here guidance, invites all friends to our company to negotiate business and friendship, create a brilliant future. American Standard elbow production process, if done long radius elbows American Standard, the first cases of the grid selected, proposed pipe material. Expansion ratio, through theoretical calculations, the general expansion ratio between 33% -35%, down push back. Short radius 219mm expanding general rate of 50%. After selecting the material, press the American Standard elbow standard material, and then consider the radius of curvature, such as American Standard elbow of 90 °, through a multi-curvature can be calculated Long material processed out of the US standard of 90 ° elbow. Through the theory of care can be calculated, and then the length of intercept length. Finally, the hot material pushing. Pushing machine masters may have seen, actually very simple. It is a horn-shaped core head or mandrel, the mandrel by a fine thicker, pushing process is a process of expanding the band bending. Behind a support, the lower feed pipe penetration mandrel archway behind a rack fixed to the mandrel. 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, both inside and outside the tooth elbow, pressing elbow, push elbow, socket elbow, welded elbow, female thread elbow. American Standard elbow seamless appearance actually are fixed, are subject to change due to some external conditions, general seamless steel pipe materials are in accordance with the appearance of irregularities and selected American Standard elbow welding production process incompatibility construction.