Kelco Industries Externally Pressurized Expansion Joints

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Externally Pressurized Expansion Joints -  - Kelco Industries
Woodstock, IL, United States
Externally Pressurized Expansion Joints
Externally-Pressuriz ed Expansion Joints are Designed to Replace: High-Maintenance Packed Joints Space-Confining Pipe Loops Costly Equalizing Expansion Joints MULTI-PLY SAFETY FACTORS – In a critical application, a multi-ply expansion joint can, in most cases, preclude a catastrophic failure. If a failure occurs in one ply due to corrosion or fatigue, the intact plies will work as a protective barrier to contain the pressure and the medium until a replacement can be made. Flex-Weld multi-ply expansion joints are designed to provide utmost safety in the event of system failure. The burst pressures are a multiple of the operating pressure making the Flex-Weld multi-ply bellows the most reliable component in the system. CYCLE LIFE OPTIMIZATION – The technical advantage of using multiple plies of thin wall thickness material is that less residual stresses are introduced at the time the bellows were formed. Overall, Flex-Weld multi-ply expansion joints have lower built-in and induced stresses which ultimately results in longer cycle life. Also, the thinner gauge multiple plies have less localized induced stresses during operation compared to a single thicker ply. The configuration of the convolutions (pitch, depth, contour, number of plies, ply thickness) of FLEX-WELD multi-ply expansion joints are optimized to offer the highest fatigue life. COMPACT DESIGN – Multi-ply expansion joints have more flexibility than conventional single-ply expansion joints and thus require less live length to accommodate a given movement. The live length of the bellows can be minimized to absorb a given combination of axial, lateral and angular movements. This results in an economical, compact assembly which can be installed in a minimal amount of space. An additional benefit is a small effective area, resulting in lower thrust pressures on the anchors and mechanical equipment in the system. LOWER THRUST FORCES – The multi-ply design results in lower spring rates. Also, the effective cross-sectional area of multi-ply expansion joints is less, compared to single-ply bellows, to accommodate a given movement. These two reductions result in lower forces and moments on the anchors, equipment and guides. A side benefit is that fewer anchors and guides will be required in the overall bellows piping system. SINGLE EPEJ BROCHURE DUAL EPEJ BROCHURE EXPANSION JOINT CAPABILITIES

Externally-Pressurized Expansion Joints are Designed to Replace:

High-Maintenance Packed Joints
Space-Confining Pipe Loops
Costly Equalizing Expansion Joints

MULTI-PLY SAFETY FACTORS – In a critical application, a multi-ply expansion joint can, in most cases, preclude a catastrophic failure. If a failure occurs in one ply due to corrosion or fatigue, the intact plies will work as a protective barrier to contain the pressure and the medium until a replacement can be made. Flex-Weld multi-ply expansion joints are designed to provide utmost safety in the event of system failure. The burst pressures are a multiple of the operating pressure making the Flex-Weld multi-ply bellows the most reliable component in the system.

CYCLE LIFE OPTIMIZATION – The technical advantage of using multiple plies of thin wall thickness material is that less residual stresses are introduced at the time the bellows were formed. Overall, Flex-Weld multi-ply expansion joints have lower built-in and induced stresses which ultimately results in longer cycle life. Also, the thinner gauge multiple plies have less localized induced stresses during operation compared to a single thicker ply. The configuration of the convolutions (pitch, depth, contour, number of plies, ply thickness) of FLEX-WELD multi-ply expansion joints are optimized to offer the highest fatigue life.

COMPACT DESIGN – Multi-ply expansion joints have more flexibility than conventional single-ply expansion joints and thus require less live length to accommodate a given movement. The live length of the bellows can be minimized to absorb a given combination of axial, lateral and angular movements. This results in an economical, compact assembly which can be installed in a minimal amount of space. An additional benefit is a small effective area, resulting in lower thrust pressures on the anchors and mechanical equipment in the system. LOWER THRUST FORCES – The multi-ply design results in lower spring rates. Also, the effective cross-sectional area of multi-ply expansion joints is less, compared to single-ply bellows, to accommodate a given movement. These two reductions result in lower forces and moments on the anchors, equipment and guides. A side benefit is that fewer anchors and guides will be required in the overall bellows piping system.

SINGLE EPEJ BROCHURE

DUAL EPEJ BROCHURE

EXPANSION JOINT CAPABILITIES

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Technical Specifications

  Kelco Industries
Product Category Metal Bellows
Product Name Externally Pressurized Expansion Joints
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