Stainless steel bellows internal pressure and external pressure difference

Stainless steel bellows internal pressure and external pressure difference
With the development of industry, the pipeline industry has also become strong, the pipeline is indispensable is the pipeline expansion joint, used to absorb the displacement of the pipeline due to thermal expansion and contraction. The common expansion joint products are axial type internal pressure and external pressure corrugated compensator, but there is an essential difference between the two.
Between the two in the structure and appearance with a great difference, both are made of stainless steel bellows for the expansion of the flexible parts. But the axial type internal pressure type corrugated expansion joint is connected by bellows and two joints. External compression type expansion joint not only has bellows and joints, and protective sleeve.
Secondly, the role of stainless steel internal pressure and external pressure corrugated is very different, axial internal pressure type bellows compensator is mainly used to compensate for axial displacement, but also can compensate for transverse displacement or axial and transverse synthetic bit more, with the ability to compensate for angular displacement. And the axial external pressure corrugated compensator mainly absorbs the axial displacement, has a large compensation, good insulation performance, residual medium can be excluded and so on. This is because the axial type external pressure corrugated compensator with stainless steel metal flexure is one model larger than the internal pressure compensator. For example: 300 caliber internal pressure type compensator should be selected 300 caliber flexure, while 300 caliber external pressure type compensator but with 400 caliber flexure. Internal pressure corrugated compensator is subjected to internal pressure, external pressure corrugated compensator is subjected to external pressure!