Externally pressurized expansion joints is an excellent answer for large axial displacement needs. When large displacements are present in a system, more convolutions are needed to handle these large axial movements. Then, designing the bellows becomes a challenge for the expansion joint engineer due to “column squirm” (instability due to internal pressure / buckling of bellows) concerns. Solution to this challenge is to pressurize the “bellows” externally.
These units are very robust and safe. They have an in-built (part of the design) inner sleeve and outer cover. Outer cover protects the bellows from external damages during shipping, installation and operation. It also makes this unit suitable for underground usage. Inner sleeve provides smooth flow and prevents pressure losses.
These units are not suitable for lateral movements.
They can be provided with pipe ends, or welded / rotating flange connections supplied in accordance with many industrial norms or special drillings.
DN
25 – 1000
Bellows Material
304, 316, 321
Flanged Material
Carbon Steel, Stainless Steel
Design Pressure
40 barg
Design Temperature
400°C
Please consult with our technical department for different working conditions and design parameters.
Expansion joint is any device containing one or more flexible element. Expansion joints are used to absorb dimensional changes in piping systems or vessels where flexibility is needed. Expansion joints are most commonly used to absorb thermal expansion/contraction, vibration, mechanical movements and ground settlements.
Expansion joints consist of bellows, accessories, and end connections. Bellows are the flexible elements. Convolutions are parts making up a bellows. Layers/plies are sheets making up a bellows
There are many advantages of using an expansion joint:
Expansion joint covers are used to provide limited protection to the bellows exterior surface. Using covers is a relatively inexpensive way for protecting bellows from mechanical damage that can happen during shipping, handling and installation and is strongly recommended for critical expansion joints. Standard practice is to ask for removable shrouds. Removable shrouds let customers inspect the bellows before installation.
Expansion joint absorb movements by bellows convolution walls bending. Each convolution is flexible and absorbs the movement it is designed for. Expansion Joints are used to absorb axial, lateral and angular movements. Torsion should not be applied on expansion joints. Advantages of a multi ply expansion joint are lower spring rates (better for pipe stresses) and higher cycle life.
KLINGER Turkey has been offering a wide range of high-quality and engineered expansion joints and metal hoses as well as standard types. Our experienced team focuses on customer satisfaction and quality while providing economical solutions to customer needs.
İstanbul Endüstri ve Ticaret Serbest Bölgesi Orhanlı Mevkii 6. Sok. No:111/6 Tuzla / İSTANBUL-TURKEY
Phone: +90 216 540 1949 (pbx)
Fax: +90 216 314 3616
E-Mail: info@klingerturkey.com
