Customable Size 304/316/321 Stainless Steel Metal Expansion Joint Metal Bellows
DN15-DN3000
Our stainless steel metal expansion joints, also known as metal bellows, are precision-engineered to absorb thermal expansion, vibration, piping movement, and misalignment in demanding high-temperature and high-pressure systems. Manufactured from premium-grade stainless steel, they provide exceptional corrosion resistance, mechanical strength, and operational flexibility across a broad spectrum of industrial environments.
Delivery
FOB
minimum order
1 piece
Supply Ability
100piece / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $45.00 - US $10000.00 / piece
**Material Options**
We offer three primary stainless steel grades to accommodate varying service conditions. Grade 304 stainless steel delivers reliable general-purpose corrosion resistance, making it suitable for most standard industrial applications. Grade 316 stainless steel offers enhanced resistance against chlorides, acidic media, and saline environments, making it an excellent choice for marine, coastal, or chemical processing installations. Grade 321 stainless steel, stabilized with titanium, is specifically designed for sustained high-temperature service up to approximately 800°C, effectively preventing intergranular corrosion and maintaining structural integrity under thermal cycling.
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**Customizable Dimensions and Configurations**
Every aspect of the expansion joint can be customized to your exact requirements. Nominal bore sizes range from DN15 up to DN3000 and beyond, covering NPS ½"to 120"or larger. Overall length, convolution pitch, and the number of convolutions are all adjustable to achieve the desired movement capacity and spring rate. End connections can be supplied in various styles, including flanges manufactured to ANSI, DIN, or JIS standards, welding ends for permanent installation, threaded connections, or grooved couplings. Pressure ratings are calculated and designed per your system specifications, accommodating everything from vacuum service to high-pressure operation.
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**Mechanical Design and Performance**
Our bellows are available in single-ply or multi-ply construction, allowing for optimized balance between pressure containment and flexibility. Multi-ply designs significantly enhance fatigue life and cycle performance while maintaining lower spring rates, which reduces the load on adjacent piping and supports. Every unit is engineered in accordance with EJMA, ASME, and applicable international standards, ensuring reliable performance under axial, lateral, and angular movements, either individually or in combination.
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**Quality Control and Documentation**
Rigorous quality control is implemented at every stage of production, from incoming raw material inspection to dimensional verification and final performance testing. Optional non-destructive testing methods, including hydrostatic testing, pneumatic testing, and helium leak detection, are available upon request. Each shipment can be accompanied by complete material test reports, NDT reports, and dimensional inspection records to support your project documentation and quality assurance requirements.
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**Why Choose Customization**
Customization ensures a precise fit for non-standard or space-constrained piping systems, optimizes service life based on actual movement patterns rather than generic assumptions, and avoids both over-engineering and under-specification. Our engineering team works closely with you to review your operating conditions and provide detailed design proposals, including technical drawings, prior to production.
We offer three primary stainless steel grades to accommodate varying service conditions. Grade 304 stainless steel delivers reliable general-purpose corrosion resistance, making it suitable for most standard industrial applications. Grade 316 stainless steel offers enhanced resistance against chlorides, acidic media, and saline environments, making it an excellent choice for marine, coastal, or chemical processing installations. Grade 321 stainless steel, stabilized with titanium, is specifically designed for sustained high-temperature service up to approximately 800°C, effectively preventing intergranular corrosion and maintaining structural integrity under thermal cycling.
---
**Customizable Dimensions and Configurations**
Every aspect of the expansion joint can be customized to your exact requirements. Nominal bore sizes range from DN15 up to DN3000 and beyond, covering NPS ½"to 120"or larger. Overall length, convolution pitch, and the number of convolutions are all adjustable to achieve the desired movement capacity and spring rate. End connections can be supplied in various styles, including flanges manufactured to ANSI, DIN, or JIS standards, welding ends for permanent installation, threaded connections, or grooved couplings. Pressure ratings are calculated and designed per your system specifications, accommodating everything from vacuum service to high-pressure operation.
---
**Mechanical Design and Performance**
Our bellows are available in single-ply or multi-ply construction, allowing for optimized balance between pressure containment and flexibility. Multi-ply designs significantly enhance fatigue life and cycle performance while maintaining lower spring rates, which reduces the load on adjacent piping and supports. Every unit is engineered in accordance with EJMA, ASME, and applicable international standards, ensuring reliable performance under axial, lateral, and angular movements, either individually or in combination.
---
**Quality Control and Documentation**
Rigorous quality control is implemented at every stage of production, from incoming raw material inspection to dimensional verification and final performance testing. Optional non-destructive testing methods, including hydrostatic testing, pneumatic testing, and helium leak detection, are available upon request. Each shipment can be accompanied by complete material test reports, NDT reports, and dimensional inspection records to support your project documentation and quality assurance requirements.
---
**Why Choose Customization**
Customization ensures a precise fit for non-standard or space-constrained piping systems, optimizes service life based on actual movement patterns rather than generic assumptions, and avoids both over-engineering and under-specification. Our engineering team works closely with you to review your operating conditions and provide detailed design proposals, including technical drawings, prior to production.
