Bose external pressure bellows, external pressure bellows purposes million harbor harbor provided by the million. Hebei Billion Pipeline Limited (www.hbyhgd777.com) Hebei Cangzhou Premium Business League certification companies, with brands such as sea-million, has a good reputation, honesty, service-oriented "business alliance Service" icon on the page, We will be happy to serve you! 1 bellows straight section diameter size in public relations should be consistent with GB1804 H12-level requirements. 2 Dimensions and technical requirements bellows and pipes (or device) is connected to the flange and the end of the tube should meet the appropriate standards. When the end of the tube is connected at both ends of the nozzle should be open 30 degrees ± 2.5 degrees bevel. When 3 bellows end tube rolled steel welded pipe, external end four Zhou Changgong roundness tolerance of difference and the end of the tube should be consistent with the tolerance table. 4 bellows with the end of the tube (or flange), etc. should be attached to the ring weld TIG or MIG welding fluorine external pressure bellows, bellows single arc can be used when the wall thickness is greater than 2mm . 5 taken to deal with the outer protective measures bellows bellows pressure sales, to prevent burn-through bellows welding arc and weld slag splashing onto the bellows when the bellows assembly. Expansion joints (compensation) of various parts of the weld shall not have cracks, pores, slag and other defects external pressure bellows purposes, undercut depth of not more than 0.5mm 7, all active components compensation shall be stuck or restricted external member Its range of activities outside the plant pressure bellows, should ensure the normal operation of all moving parts. 8, hydrostatic testing, response times fixed pipe rack mounted compensator reinforce the ends of the pipe so that the pipe does not occur to move or rotate. For compensation for the gas medium and its connecting piping, pay attention to the need for additional water-filled temporary support. The solution was washed with water pressure test 96 chloride ion content of not more than 25PPM. 9, after the hydrostatic test shall discharge waves in the water as soon as the shell, and the shell surface waves quickly dry. 10, insulation materials in contact with compensator bellows should not contain chlorine