First, use: Buried compensator (also known Buried bellows, expansion joints buried, buried bellows expansion joints, bellows expansion joints Buried Buried corrugated compensator is mainly used for axial compensation buried pipe. with bending capacity of 20,000, 2.1 Description: Buried corrugated compensator is mainly applied axial compensation, but also has superior resistance to bending, so I do not consider the impact of the pipeline sinking, Buried corrugated compensation shell and guide Compensation under freedom retractable sleeve to protect other properties with the same 2.2 ordinary bellows thermal deformation:. △ L = a · t · L = 0.0133 × 360 × 30 = 143.6mm Note: a carbon steel commonly used expansion coefficient t pipeline medium temperature - ambient temperature compensator installed when L is the length between the two mounting bracket three, installation considerations: 3.1 In order to play Buried bellows compensation, compensation ends must set a fixed bracket, prevent the relocation of the pipeline by the pressure thrust influence stretched at one end 3.2 Buried corrugated compensator (referring to the one-way compensation Buried compensator dead-end) to be close to the end of the mounting bracket, with compensator Live head compensation pipeline. 3.3 Setting the distance between the mounting bracket according to the amount of compensation Buried corrugated compensator, the compensation does not exceed the diameter of 3.4 pressure test procedure to Buried corrugated compensation shall be no pull compensator series by one or more bellows together outside bellows bellows allows axial movement of the outer sleeve, that is, protection devices, while maintaining its stable use: Buried major internal pressure bellows for buried pipeline axial compensation, with bending ability, so do not consider the impact of the sinking of the pipeline, products with large amount of compensation, long life models: Bellows> factory production DN32-DN1600, pressure level of 0.25 Mpa-2.5Mpa Product axial compensation: 30mm-50 Buried bellows internal pressure is mainly applied to axial compensation, but also has superior resistance to bending, so I do not consider the impact of the pipeline sinking Buried corrugated compensation. freedom telescopic compensation under the housing and the guide sleeve to protect other properties with ordinary corrugated fill the same.