"EQUAL™" Spring Hanger General Information

When should spring hangers be used?

When pipe moves vertically and when loads on attached equipment are required to remain constant as the pipe moves, then a spring hanger should be considered. Spring hangers are used to provide support to a pipe at a support location at the time the pipe is installed. Pipe movement is generally caused by thermal expansion or contraction of the piping system but it can also result from the movement of the equipment to which the pipe is connected. The underlying objective for using a spring hanger is to minimize the change of load applied by the piping on the connected equipment.

Determining the size and series to use

Data can be determined analytically by computer analysis, manual methods if the piping system is not yet installed or it can be determined by field measurement if the piping system is installed and operating. To determine the optimum load to be carried by the spring hanger in the operating position, calculate the weight of the piping system in the "as installed condition" which is carried by a rigid support placed where the spring hanger is to be located.
The calculation should include:

the weight of the pipe, valves and fittings,
the weight of the contents and insulation,
the weight of the hanger hardware below the spring hanger casing,
the downward force of any other possible load such as snow or ice.

Note: For Type G spring hanger, the load to be carried by the hanger should also include the catalog weight of the hanger unit itself. Once the load to be carried is determined, the installed to operating deflection can be calculated by performing an operating case analysis with the optimum load considered as a constant acting upward force. This analysis will yield the desired deflection. "EQUAL™" spring hangers are designed and manufactured for the following ranges of movements: 1.25" (Series E-82), 2.5" (E-268), 5.0" (E-98), 7.5" (E-100) and 10" (E-110). Knowing the ranges of movements accepted by "EQUAL™" hangers, operating loads and the operating deflections, will determine the spring hanger that best fits your requirements. View the "Hanger Size and Series Selection Chart."

Spring Hanger Types

Type A-Used where ample head room is available. Specific elevation is desirable.	Type B-Used where headroom is limited. Head attachment is a single lug.	Type C-Used where headroom is limited. Head attachment is side by side lugs.	Type D-Used where the spring hanger is mounted on top of a pair of back to back channels. Provides for adjustment of the load from above the supporting channels.	Type E-Used where the spring hanger is mounted on top of a pair of back to back channels. Provides for adjustment of the load from below the supporting channels.
	Type F-Used where the spring hanger must be placed under the piping to provide support from the floor or a structural member. Typically supplied with a load flange but can also be supplied with a roller.		Type G-Used were head room is insufficient to accommodate the spring hanger and the necessary associated hardware. Also used where an interference exits directly above the piping system being supported is not centered between the spring hangers, each hanger will then carry its proportional load.