Article
FLEX-TEND® Flexible Expansion Joints, Features And Specifications
February 13, 2006
•Article: FLEX-TEND® Flexible Expansion Joints, Features And Specifications
FLEX-TEND® flexible expansion joints are designed to protect structures and pipelines from differential movement whether this movement is earthquake induced or the gradual motion of soil subsidence. This paper is offered as a concise listing and discussion of the important features and materials of the double and single ball assemblies.
General Configurations
The FLEX-TEND product line is offered in both a
double and single ball configuration. Both assemblies
provide expansion capacity integral to the deflection
capability of the ball and socket. These units are
available in the 3" through 36" nominal size range.
All FLEX-TEND assemblies are capable of a
minimum 15° deflection per ball joint as well as having variable expansion capacity.
The double ball FLEX-TEND joint provides shear relief for connections to structures with its ability to offset in any plane. This is accomplished by the use of two ball and socket pairs separated by an expansion joint. As the offset motion occurs, the expansion joint provides the required increase in length, thus relieving axial strain on the line and structure. This configuration has been used successfully on connections to tanks, buildings, bridges, and other structures.
The single ball FLEX-TEND assembly is applicable on installations where protection from bending moments and axial strains is warranted. As the name suggests, this assembly consists of one ball and socket pair with an integral expansion joint. When used in installations such as pipelines crossing soils subject to subsidence or liquefaction, the rotation of the ball acts to relieve bending stress while the expansion joint provides the necessary increase in length. If shear relief beyond the capability of a standard double-ball configuration is needed, two single ball units separated by a sufficient length of pipe is an option.
Click Here To Download:
•Article: FLEX-TEND® Flexible Expansion Joints, Features And Specifications
SOURCE: EBAA Iron Sales, Inc.
