The Pipe Support Blog

F-Type Variable Spring Supports

An assortment of standard variable spring supports were manufactured ranging in size from 8-5/8" to 12-3/4" dia. with installed heights ranging from 9-7/16" to 18-1/8". The F-Type pipe hanger assembly is used to support the pipe from below and are typically mounted to concrete pads via anchor bolts or welded to structural steel. The various springs shown are designed for operating conditions ranging from loads of 1750 lb. with .02" travel to 21,280 lb. loads with .13" travel. As with all of our variable supports, these were quality checked with a 100% spring coil deflection test and a load cell calibration to set the assembly at the prescribed installed load.

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The variable spring and clamp assemblies are fabricated using a combination of carbon steel for the housing and internal components, spring steel for the spring coils, and Cro-Moly (A-387 GR. 22) for the high temperature 3-bolt clamps. This pipe hanger assembly is an example of PT&P's standard variable spring design wherein multiple coils are arranged in series to produce adequate load carrying capacity and coil deflection to compensate for the anticipated pipe movement. These particular assemblies are capable of an overall load range of 9,320 lb. to 15,970 lb. with a total travel range of 5". All pipe hanger assemblies underwent standard load and travel testing, 100% deflection testing, and load cell calibration before shipping to a power generation facility.

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5,800 lb. load Type F Variable Springs

Piping Technology and Products, Inc. recently designed and fabricated eighteen 1,200 lb to 5,800 lb. load PTP-2 type F size 100 to 150 variable springs for a company in South Korea. These variable springs fabricated from carbon steel are designed for 200°F. They have an overall height of 9.5" to 11.5" and are designed for a travel range of 1/8" upward to 3/16" downward. Per the customer's request the variables were coated with a custom paint. To ensure quality, standard load testing was performed on the variables prior to shipping.

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PT&P Provides Variable Springs to an Oil Refinery

Piping Technology & Products, Inc. has designed and manufactured over 177 tons of supports for the Chad/Cameroon Development Project in Chad, Africa. Adjustable Base Pipe Supports designed to support pipe size ranging from 3 to 18" in diameter were one type of the many supports fabricated for this project.

Each of the hot-dipped galvanized pipe stands (pictured at left) has an 8"x8" base plate and a midrange height of 12". The pipe stands allow for a maximum travel of +/- 3". These supports provide for easy adjustment in the field when supporting pipe trunnions on concrete pads or foundations. In addition, these pipe stands have a major advantage when the exact installation heights are not known at the remote job site.

Other supports including constants and variables spring hangers, rigid rod hangers, structural steel, FRP pads, and pre-insulated pipe supports were also manufactured in a range of different specifications and materials.

Want to learn more about variable springs? View a past variable spring webinar now!