Product Overview
Metal Bellows Expansion Joint (Bellows Compensator) is a core supporting component for environmental flue gas pipelines, desulfurization & denitrification, dust removal and thermal piping systems. It is widely matched with waste gas treatment, waste incineration, dust removal duct, thermal pipeline and other environmental protection equipment. It is the key pipe fitting to absorb thermal expansion & contraction displacement, reduce vibration noise and compensate installation deviation.
This spring tie rod type expansion joint is specially developed for high temperature, dust-laden and alternating load working conditions of environmental flue gas pipelines. It effectively solves pipeline stress tearing caused by thermal deformation, vibration impact and foundation settlement, ensures continuous and stable operation of the whole flue gas treatment system. It is the preferred product for complete machine supporting and old pipeline maintenance & replacement of environmental protection equipment.
Material & Manufacturing Process
The main bellows is integrally hydroformed with high-quality 304/316L/310S stainless steel sheet. Flanges and end rings adopt carbon steel or stainless steel forgings. Multiple processes including CNC precision machining, solution heat treatment and non-destructive testing are applied. The bellows has dense and uniform structure without cracks, sand holes or residual deformation.
Inner wall of corrugation is polished for anti-corrosion and dust accumulation resistance, suitable for sulfur-containing, dust-laden high-temperature flue gas medium. The matched spring limit tie rod assembly passes tension load test to limit excessive stretching or compression of bellows. Anti-corrosion strengthening treatment is implemented to improve corrosion resistance, fatigue resistance and impact resistance, adapting to harsh working conditions of high temperature, dust and acid-base flue gas in environmental workshop.
Key Advantages
1. Multi-directional Displacement Compensation: It can absorb axial, lateral and angular combined displacement at the same time, offset stress generated by pipeline thermal expansion, equipment vibration and foundation settlement, protect pipelines and main environmental equipment and prevent pipeline cracking and leakage.
2. Vibration Damping & Noise Reduction, Long Fatigue Life: Flexible corrugated structure buffers pipeline vibration, reduces vibration transmission and operating noise during flue gas transportation. Stainless steel bellows withstand cyclic fatigue for 24h continuous operation of environmental systems.
3. Corrosion Resistance & Tight Sealing: Stainless steel bellows resist acid and alkali flue gas corrosion. Precisely machined flange sealing surface with gasket prevents leakage of flue gas and dust, avoiding exhaust gas overflow to meet environmental emission sealing requirements.
4. Limit Protection & Easy Installation: Equipped with spring limit tie rods to prevent bellows damage from over-range deformation. Manufactured according to GB/T16749 industry standard. Flange positioning is accurate with simple assembly, no secondary on-site machining. Suitable for new environmental pipeline construction and renovation of old equipment.
Application Scope
Widely used in desulfurization & denitrification units, bag dust collectors, waste incineration flue gas pipelines, chemical waste gas pipelines, power plant thermal flues, metallurgical dust removal pipelines and other complete environmental protection equipment.
Applied in waste-to-energy plants, cement plants, chemical plants, steel mills, thermal power companies and other waste gas treatment projects. Custom non-standard diameter, pressure grade and special anti-corrosion & temperature-resistant models available to meet personalized supporting requirements of various environmental pipeline systems.
