A hanger that provides constant support for piping throughout the full range of expansion and contraction. Constant support hangers are generally used to support critical piping systems
Constant-support hanger
Pipe hanger construction and installation depend on:
Pipe size
Piping configuration
Location of system equipment (i.e., inline valves, fittings, components)
Building structures available for supporting the pipe
There are two basic classifications of pipe hangers
flexible and rigid
Flexible hangers can be classified as two types:
Constant support
Variable support
Hangers that typically support critical piping systems
Constant support
Normally used at locations where no vertical movement occurs
Rigid hangers
Rigid hangers can be divided into two main categories
Horizontal pipe attachments and
Vertical pipe attachments
Type of pipe hanger available for more complex piping systems
snubber
Snubbers have two types:
Mechanical and Hydrolic
Used as seismic restraints where loading is cyclic and requires rapid alternating restraint in two directions along a single axis
hydraulic snubbers
Mechanical snubbers perform their duty through a couple of different designs