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Variable Springs — The Pipe Supports Blog

F-Type Variable Spring Supports Designed for an LNG Facility

February 8th, 2015 Comments off

F-Type Variable Spring Supports Designed for an LNG Facility

PT&P manufactured F-type variable spring supports for an LNG facility in Colorado. The variables installed heights range from 10-5/8″ to 21-1/16″. 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 633 lb. to 6510 lb. 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.

F-Type Variable Spring Supports Designed with Stainless Steel Slide Plates and Permanent Travel Stops

November 8th, 2014 Comments off

F-Type Variable Spring Supports Designed with Stainless Steel Slide Plates and Permanent Travel Stops

PT&P custom designed F-type variable spring supports for an oil refinery in Saudi Arabia. These assemblies range in height from 14-1/4″ to 39-3/8″ and include stainless steel slide plates and upper permanent travel stops. Some of the variables include an additional pipe extension to meet the installation height requirement. The variables are fabricated from carbon steel and painted with a special paint to resist corrosion. All variable assemblies underwent a standard variable spring test prior to shipment.

G-Type Variable Spring Supports Designed for a Chemical Plant

September 20th, 2014 Comments off

G-Type Variable Spring Supports Designed for a Chemical Plant

PT&P designed G-Type variable spring supports for a chemical plant in Texas. The variables are comprised of two standard spring housing joined together with an intermediate bridge assembly. The bridge assembly is customized to match existing site conditions which allows for use in applications with limited space or interferences. The variables are fabricated from carbon steel with a hot-dipped galvanized finish. The assemblies were designed for a total operating load of 23,522 lb. with a downward design travel of 3/8″. Each assembly underwent a standard load test prior to shipment.

F-type Variable Spring Supports Designed for a Petroleum Facility

May 16th, 2014 Comments off

F-type Variable Spring Supports For Petroleum Facility

PT&P designs thirty F-type variables spring supports for a petroleum facility in Canada. The springs are fabricated from carbon steel and with a hot-dipped galvanized finish. The assemblies are internally guided and have a 3,455 lb. operating load. A standard travel test was conducted on the variables prior to shipment.

112 Custom Variable Springs Designed for a Furnace Application in Venezuela

December 15th, 2013 Comments off

112 Custom Variable Springs Designed for a Furnace Application in Venezuela

112 custom variable springs designed for a furnace application for an oil refinery in Venezuela. The furnace cans are designed from carbon steel and painted with red oxide primer to prevent corrosion when exposed to high temperatures. The sizes of these figures PTP-6 and PTP-8 range in length from 25″- 39″, with a total travel of 0.1″- 1.821″ and loads varying from 430 – 681 lb. A load test to confirm the spring rate was conducted on each assembly prior to shipment.

Variable Spring & Graphite Slide Plate Assemblies Custom Designed for Gasoline Production in Dubai

September 21st, 2013 Comments off

Variable Spring & Graphite Slide Plate Assemblies Custom Designed for Gasoline Production in Dubai
In eight weeks, PT&P provided a gasoline production plant in Dubai with two custom designed variable assemblies. Each assembly includes load columns, four variable spring cans, four channels, 12 plates, nine graphite slide plates and a custom designed frame. The frame allows the variable springs to work in unison to support large pipe trunnions. The top plates measure 45″ in width and 25″ in height. The variables are designed for an operating temperature of 750°F and an operating load of 3,150 lb. The assemblies are capable of 1/8″ upward movement and 1/6″ downward movement. A load test was conducted prior to shipment.




112 Variable Spring Supports for a Furnace Application

September 9th, 2013 Comments off

112 Variable Spring Supports for a Furnace Application

PT&P designed and fabricated 112 variable spring supports for a furnace application at an oil refinery in California. The spring cans are fabricated from carbon steel, vary from 36″ to 54″ in height and designed to operate at 400°F. The furnace cans are designed for operating loads ranging from 180 lb. to 1,400 lb. and movements from 1″ to 5″. The customer specified a custom paint system of two part iron oxide blue finish for the cans to comply with refinery conditions. Load tests were performed on the assemblies prior to shipment to determine the operating load and variability.

C-Type Variable Spring Support Assemblies Designed for an Oil Sands Mine

April 21st, 2013 Comments off

C-Type Variable Spring Support Assemblies Designed for an Oil Sands Mine

PTP-2 160 C-Type variable spring support assemblies were designed and fabricated for an oil sands mine in Canada. The variables are 8″-12″ diameter, 16″ to 32-1/2″ overall length, and designed for an operating load of 5590 lb. with an upwards travel of 0.787″. The variables were fabricated from carbon steel with a hot-dipped galvanized finish and standard load and travel testing was completed prior to shipment.

Custom Sway Brace and Variable Spring Assemblies Designed for an Aerospace Development Facility

April 8th, 2013 Comments off

Custom Sway Brace and Variable Spring Assemblies Designed for an Aerospace Development Facility

These custom designed sway braces and variable spring assemblies were designed for hanger duct work in an aerospace development facility. The assemblies measure 67-1/2″ long with a 14-1/8″ O.D. The variables are a modified F-type spring with a pivoting base and non-standard coil combination, including a nested spring design. The assemblies include fully adjustable travel stops and custom end brackets. They are fabricated from carbon steel and designed for load ranges between 1100 lb. and 9250 lb. with a spring rate of +/- 2.78″.

Variable Spring Hanger and Pipe Clamp Assemblies Designed for a Cogeneration Plant in Canada

January 27th, 2013 Comments off

Variable Spring Hanger and Pipe Clamp Assemblies Designed for a Cogeneration Plant in Canada

These variable spring hanger and pipe clamp assemblies were custom designed for pipes ranging from 6″ to 20″ diameters at a co-generation plant in Canada. The spring can, threaded rods, weldless eyenuts, welded beam attachments and Fig. 80 pipe clamps were fabricated from hot-dipped galvanized carbon steel. The assemblies are capable of an overall load of 10,790 lb. with a total travel of 1/2″. A total of 21 spring hanger and clamp assemblies underwent standard load and travel testing.

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