Adjustable spring hanger pipeline equipment _ _ Huaneng spring hangers

Recently some customers call me Gongyi City Huaneng Pipeline Equipment Manufacturing Co., Ltd., ask our pipe hangers perform what specific standards, applicable rules of pipe supports my company also made a relevant understanding. This will be our special pipe hangers use standards and applicable specifications published as follows: GBi7116-1997 "pipe hangers" M55 SPSB, SPG9, SP89 "pipe hangers)) ASME ASME" Boiler and Pressure Vessel Code "B3f .1 "Power Piping" "Boiler and Pressure Vessel Code" VIII) Nuclear Power Plant NB supports RCC} M "PWR nuclear island mechanical equipment design and construction rules" H chapter support GBi5U} 1998 "steel pressure vessel "DLIT SQS} -1996" thermal power plant steam piping design technical requirements "DLIT 1113} 20} 9" power plant pipe hangers and acceptance procedures "applicable rules ECEPDI 1983 edition of" pipe hangers Handbook "Northwest Power Institute 1983 edition of "pipe hangers Manual" J} IT 813 D.1 "constant force spring hanger" J} IT 8130.2 "variable spring hangers" "SPEC series pipe hangers Handbook" Jiangsu Power Equipment Ltd. constant force spring hanger HCIT 200664-1998 "chemical variable force spring hanger" feature on pipeline equipment spring hanger curve for installation and pipe hanger choice has a very important role. Straight pipe hangers stiffness due to stable and simple to manufacture, and therefore most widely used, cylindrical compression or tension spring to fall into this category, but it also limited to an average diameter of external load does not exceed the elastic limit of the material and the spring constant time is appropriate, if the alien load exceeds the elastic limit of the material, the material will result in yield caused permanent deformation, even after shed load, spring can not be restored to its original position, which is why the choice of pipeline plant spring hanger when the heat treatment process, the elastic limit of the material to a primary consideration sake. Spring hangers those incremental type characteristic curve, when the plumbing external load reaches a certain level, the stiffness increases dramatically, thus helping protect the spring. For example hanger inside the conical coil spring, due to the different average diameter of each circle, spring index is not the same, the index lower end of the upper end of the larger, rear springs under load, deformation start until the bottom of the first and tight as a whole, so practical and effective to reduce the number of turns of the spring, and then subjected to deformation are those of the turns of the spring index is small, thus sharply increased rigidity. Those leaving the friction loss characteristic loading and unloading do not overlap plywood, ring and disc spring hanger pipeline equipment, it can be made use of its damping or cushioning device characteristics.