Marine stainless steel bellows expansion joints are mainly used in internal combustion engine exhaust pipes as a compensationdevice for thermal expansion of the pipes. In the system, they can withstand the thermal expansion stress of the pipes and thevibration caused by pulsation. The following is a detailed analysis of marine stainless steel bellows expansion joints:
1. Definition and function
Definition: Marine stainless steel bellows expansion joints are a new type of connecting pipe fittings in which a bellows is directly connected to two flanges. Bellows is a thin-wall pipe fitting with a corrugated outer surface, usually made of stainless steel and hashigh axial elasticity.
Function: The main function is to absorb vibration, compensate for pipeline movement and absorb noise. It can improve the fatiguerupture capacity of pipelines, reduce pipeline noise, and provide flexible compensation methods in complex piping systems.
2、 Performance characteristics
High temperature resistance, seawater resistance, and chemical corrosion resistance: In complex marine environments, expansion joints are required to have high temperature resistance, seawater resistance, and chemical corrosion resistance to ensure long-term stable operation.
High flexibility and high fatigue life: Ships are affected by wind and waves during navigation, causing deformation of the hull. Therefore, expansion joints need to have high flexibility and high fatigue life to adapt to these changes.
Compact structure and reliable sealing: The space on the ship is precious, so the structure of the expansion joint needs to be compact, and the sealing performance should be reliable to prevent medium leakage.
3、 Application FieldsStainless steel corrugated pipe expansion joints for ships are widely used in industrial fields such as petroleum, chemical, heating, shipbuilding, cement, metallurgy, etc.
Especially on the steam, water, oil, and flue pipelines of ships,And the positions of diesel engine exhaust holes and pump inlet and outlet are important application scenarios for marine stainless steel bellows expansion joints.
4、 Installation and PrecautionsPre installation inspection: Before installation, the model, specifications, and pipeline configuration of the expansion joint should be checked to ensure compliance with the design requirements.
Installation direction: For expansion joints with inner sleeves, attention should be paid to aligning the direction of the inner sleeve with the flow direction of the medium; The hinge rotation plane of the hinge type expansion joint should be consistent with the displacement rotation plane.Installation process:
During the installation process, it is strictly prohibited to use expansion joint deformation to adjust the installation deviation of the pipeline, in order to avoid affecting its normal function, reducing its service life, and increasing the load on the pipeline system, equipment, and supporting components.
