Head weightlessness swing around uncontrollable design elliptical head when the cap head, because it is round so when we designed its search for accurate focus and avoid head due to the adverse consequences of weightlessness, but some manufacturers Head products produced during normal operation or will appear weightlessness, leading to the project can not function properly, resulting in serious consequences. Elliptical head instability consequences and impact of the head buckling pressure has a great influence through a series of amendments to simplify and experiments can guide cone shells have elastic critical buckling pressure outside the formula 2-6-2 Pressure stability of conical head, checking principle to a series of equations of conical shell under external pressure when the general solution of its instability lists virtually impossible, Niordson shown using the energy obtained by the theory in 1947 Article simply supported at both ends. Head weight loss for many reasons, such as welding problem if head is made of carbon steel or low alloy steel, and then when it is immersed in a solution of hot-dip galvanized or aluminized, the large cap head may crack, which is hot-dip galvanized aluminized crack, according to head professional analysis, the hat head standard, which is processed by the welding residual stress and residual stress common cause, therefore, before this, we should first conduct heat treatment, welding residual stress and to remove residual stress working to prevent this phenomenon. Yanshan County Bo Yan Pipe Co., Ltd. is located in Yanshan County Industrial Development Zone. North of Beijing and Tianjin and Beijing-Shanghai railway to the east Bohai Sea, Tianjin Port, State Road across the county superior geographical conditions, abundant local resources, for my company's development has laid a good foundation. Best-selling products, and exported to South Korea, Vietnam, Singapore, Malaysia and other countries. I used to pursue "science and technology first, gaining the upper hand, quality, customer supreme, credit first" business ideas, is willing to domestic and foreign users and sincere welcome customers to work together to create a better future head of a large butterfly design standards ( 1) the different structure type, head different manufacturing methods while incorporating this standard, and put forward a unified manufacturing, testing and inspection requirements, which improve the quality of various head is necessary. (2) The standard both inclusive design by the rules (and JB150 supporting) the head, also inclusive design by analysis (and JB4732 supporting) the head, in the realization of China's first steel pressure vessel head unification quality requirements. (3) The text of this standard (mainly manufacturing head, inspection and acceptance requirements) as a mandatory provision, and the appendix of this standard (mainly various types of head size, the inner surface area, volume, mass, etc.) As a guide content, which is conducive to influence product quality and safety of the various elements of the uniform requirements, but also to the user of this standard to all kinds of factors do not affect the safety of the space selected, alloy tube caps head to make them based on the actual needs, can choose according to the standard, in accordance with the appropriate design criteria, design their own calculations. Alloy head cap | cap head | Bo Yan Pipe supplied by Bo Yan Pipe Co., Ltd. Yanshan County. Yanshan County Bo Yan Pipe Co., Ltd. (www.czbygy.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!