Product material: carbon steel: 10 #, 20 #, Q235,20G, A105; stainless steel: 304,304L, 316,3016L, 1Cr18NI9Ti, 0Cr18Ni10Ti, 0Cr18Ni9,00Cr19Ni10; steel: P91,12Cr1MoVG, 16Mn, 15CrMoV, 12Cr1Mov , 10CrMo910,1Cr5Mo etc. Standard: GB, American Standard (ANIS), Japanese Standard (JIS), British standard (BS), German standard (DIN), Italy superscript (UNI), etc. Material: carbon steel, stainless steel, alloy steel Packing: fumigation Wooden pallets can be according to customer requirements for special packaging. Product Quality: ISO9001: 2008 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health and safety management system, pressure pipe special equipment manufacturing license, the State Power Corporation, China National Petroleum Corporation a supply network members push elbow - the geometry of the main parameters are the radius of curvature R, the radius of curvature of the circular cross section perpendicular roundness (the actual cross-sectional diameter Ds - Standard sectional diameter Db) and a wall thickness δ (see Fig. 1). Effect Pushing elbow geometry parameters are: system pushed billet material, wall thickness and outside diameter, material and shape of the mandrel head, and the heating temperature distribution and the speed of advancement. The following were discussing the impact of various process parameters on the elbow to push the system geometry. (1) Push elbow with blank material, thickness and outer right elbow to push the system geometry thermal power industry commonly affects the elbow to push the system and A335P22 and other materials are WB36. WB36 temperature strength of less than A335P22 temperature strength, high temperature plastic WB36 is less than the high temperature plasticity A335P22, the thermal conductivity is less than the thermal conductivity of A335P22 WB36's. Therefore, in the same blank diameter, wall thickness and shape of the mandrel head size, the fit and performance WB36 die less than A335P22. Pushing elbow needs normalizing heat treatment, machining port, thickness and machining allowances need to be left burning. Usually the balance of the theoretical thickness of the elbow 10% to 20%. Elbow-sectional diameter and wall thickness δ D ratio is smaller, the better the performance and fit the mold, but inside the arc bends more easily wrinkling. The metal plastic deformation during constant volume, pushing molding constant wall thickness (actual micro-thinning), equal to the length of the outer arc tube elbow-length features, the outside diameter of the tube to push the system to derive the formula: Dp - - tube outer diameter; D --- elbow cross-sectional diameter; δ --- elbow wall thickness; R --- bend radius of curvature.