The thickness of the carbon steel pipe cap, quality steel cap http://www.guohuadianci.com/ Tel 0317-8210122, Mobile 137227246651 This standard specifies the steel pressure vessel with elliptical head head manufacturing, testing, inspection requirements, steel pressure vessel used elliptical head type and parameters given in this standard types and parameters listed in Table 1 type of the entire board, or an imposition made by stamping, spinning and rolling-shaped steel pressure vessel with an oval head, 3, as provided herein manufacturing, testing, and inspection requirements, the elliptical head for the type listed in Table 1, is also used in other types and parameters of the entire board, or splicing stamping, spinning and rolled steel oval shaped, butterfly, folding conical the ball crown-shaped head.