Spring Supports Constants and Variables are used for supporting piping and related components which are subject to thermal expansion. For minor vertical travel the Variable Load Support is normally used, whereas the Constant Load Support should be used for greater levels of thermal expansion.
Both types of Spring Supports are usually manufactured in standard carbon steel, but low temperature and stainless steels may be utilized for special environmental conditions. A wide range of surface protection coatings is also available for spring supports.
Moreover, spring supports are designed to absorb/accommodate the vertical displacement of a piping system caused by temperature change (thermal expansion/contraction) or subsidence etc. They also, in conjunction with hanger rods and slide bearings, accommodate any horizontal displacement which may occur.
Spring supports are critical components because, without such support, excessive pipe stress would cause significant damage to the piping system and other components connected to that system.
Constants and Variables
For displacements over 75mm, the constant spring support is recommended. Use of a constant effort support may also be appropriate when only a small change in load is accepted (e.g. close to sensitive equipment) or where space considerations may prevent the use of a variable effort support.