1. Purpose: Axial external pressure bellows compensator main absorption axial displacement, with a large amount of compensation, good insulation properties, the residual medium can be ruled out and so on. 2, Model: DN32-DN1600, pressure level: 0.1Mpa-2.5Mpa 3, axial compensation: 18mm-400mm 4. Connection: 1. take over the connection flange connection 2. Calculation of axial forces external pressure bellows calculation of bearing forces :( not consider amendments to the compensation temperature and stiffness) Example: a steel pipe, nominal diameter 500mm, working pressure 0.6MPa; medium temperature 350 ° C, the lowest temperature environment - 10 ° C, install a temperature of 20 ° C, as shown in a long line, the number of fatigue requirements for 3000. To install an external pressure compensator, calculate the compensation for bearing force. External pressure compensation is usually installed at the following location (not shown): Solution: (1) thermal deformation: △ L = a · t · L = 0.0133 × 360 × 30 = 143.6mm (2) according to the conditions and thermal deformation data , check the sample can be used 0.6TWY500 × 8F, N = 3000 times, X0 = 192mm Kx = 272N / mm. (Without pre-deformation) (3) A, B tube frame under axial force: internal pressure thrust: Fp = 100 · P · A = 100 × 0.6 × 3167 = 190020N axial stretch: Fx = Kx · X \ 272 × 143.6 = 39059.2N Fz = Fp + Fx = 190020 + 39059.2 = 229079N