Length 38mm welded flex bellows
The 38mm length flex bellows adopts integral precision welding technology (argon arc welding or laser welding), with seamless connection between the bellows body and the end connectors (flange, valve stem, pipeline interface). Compared with threaded or clamped connections, the welded structure eliminates potential leakage points, converts dynamic seals into static seals in key positions, and achieves zero external leakage. It passes strict helium leak testing and meets the leakage rate standards of DIN EN ISO 15848-1 V1 Class AH, which can effectively prevent the leakage of flammable, explosive, toxic, corrosive and high-purity media. The welds are smooth and dense, with high tensile strength and fatigue resistance, ensuring stable sealing performance even under long-term vibration and displacement cycles.
Length 38mm welded flex bellows
1. Welded Structural Design, Ultra-Reliable Sealing Performance
The 38mm length flex bellows adopts integral precision welding technology (argon arc welding or laser welding), with seamless connection between the bellows body and the end connectors (flange, valve stem, pipeline interface). Compared with threaded or clamped connections, the welded structure eliminates potential leakage points, converts dynamic seals into static seals in key positions, and achieves zero external leakage. It passes strict helium leak testing and meets the leakage rate standards of DIN EN ISO 15848-1 V1 Class AH, which can effectively prevent the leakage of flammable, explosive, toxic, corrosive and high-purity media. The welds are smooth and dense, with high tensile strength and fatigue resistance, ensuring stable sealing performance even under long-term vibration and displacement cycles.
2. Optimized 38mm Length, Balancing Space and Compensation Capacity
The fixed length of 38mm is designed for medium-compact installation scenarios, balancing the requirements of installation space and displacement compensation. It is longer than miniature 28mm bellows, providing larger axial telescopic stroke (up to ±8mm) and angular displacement (±5°), which can better absorb thermal expansion and contraction of pipelines, mechanical vibration and installation deviation; at the same time, it is more compact than long-length bellows, suitable for equipment and pipeline systems with limited but not extremely narrow axial space. The length tolerance is strictly controlled within ±0.3mm, ensuring high consistency in batch installation and avoiding matching problems caused by size deviation.
3. Excellent Flexibility and Long Fatigue Life
The corrugated structure of the bellows is optimized for the 38mm length, with reasonable corrugation pitch, number and wall thickness, ensuring uniform stress distribution during deformation. It has excellent axial, angular and lateral flexibility, which can adapt to the dynamic displacement of equipment during operation (such as valve stem lifting, pipeline vibration) without generating excessive stress. After strict fatigue testing, the service life of the product can reach more than 4 million cycles, which is far higher than that of non-welded flexible connectors, greatly reducing the frequency of replacement and improving the stability of the whole system.
4. High Temperature and Pressure Resistance, Adaptable to Harsh Working Conditions
The product is mainly made of high-quality stainless steel (304, 316/316L, 321) or high-temperature alloy materials, which have excellent mechanical strength, corrosion resistance and high-temperature stability. It can work stably in the temperature range of -60℃ to 450℃ and withstand working pressure up to PN 320/Class 1500, adapting to harsh working conditions such as high-temperature steam, low-temperature refrigerant, high-pressure gas and corrosive media (acid, alkali, salt solution). The welded structure enhances the material’s resistance to medium erosion, avoiding the problem of connection loosening caused by medium corrosion.
5. Strong Structural Integrity, Easy Installation and Maintenance
The integral welded structure has high structural integrity and impact resistance, which can withstand the external mechanical impact and pipeline pressure fluctuation during operation without deformation or damage. The 38mm length design is convenient for on-site installation—without professional lifting tools, it can be quickly matched with valves, pipelines and equipment; the welded connection has no easy-to-wear parts such as gaskets, realizing long-term maintenance-free operation. In case of special maintenance needs, the product can be disassembled and replaced with simple welding tools, reducing maintenance costs and downtime.
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