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Variable Spring Supports — The Pipe Supports Blog

F-Type Variable Spring Supports Designed for a Chemical Processing Plant

May 23rd, 2015 Comments off

F-Type Variable Spring Supports Designed for a Chemical Processing

PT&P manufactured F-type variable spring supports for a chemical processing plant in Texas. The variables are designed with an internal guide and for a movement of 0.09″. They are designed for a 5,350 lb. cold load and 5,450 lb. hot load. Because these springs had to be capable of withstanding a hydro-test in excess of 33,000 lb. (which substantially exceeded the standard maximum hydro-test of 18,000 lb.), special collars were used in conjunction with the standard travel stops. These collars are designed to absorb the large hydro load by relying on the high strength characteristics of the load flange and housing components of the assembly while essentially bypassing the threaded internal components.

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.

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.

Variable Spring Hangers Designed for an Oil Sands Expansion Project

June 30th, 2014 Comments off

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Piping Technology & Products designed and fabricated 107 variable spring hanger assemblies for an Oil Sands Expansion Project in a central processing facility in Canada. We fabricated these C-type variable springs from hot-dipped galvanized carbon steel. The design loads range from 3,343 lb. to 3,417 lb., and each assembly underwent a series of tests and detailed quality control inspections prior to shipment.

G-Type Variable Spring Supports Designed for a Paper Manufacturing Plant

April 5th, 2014 Comments off

G-Type Variable Spring Supports Designed for a Paper Manufacturing Plant

PT&P designed G-Type variable spring supports for a paper manufacturing plant in Minnesota. The variables are comprised of two standard spring housing coil subassemblies 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 1,348 lb. with an upward design travel of 0.8013″. Each assembly underwent a standard load test 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.

27 B-Type Variable Spring Supports Designed for an Oil Refinery

November 23rd, 2013 Comments off

27 B-Type Variable Spring Supports Designed for an Oil Refinery

PT&P designed and manufactured 27 B-Type variable spring supports for an oil refinery in Louisiana. The spring cans, rods, welded beam attachments, turnbuckles and clevises are fabricated from carbon steel. The spring cans have a 12-3/4″ diameter and measure 290″ from the bottom of the steel to the connection of the pipe. They were designed for 2″ of vertical movement and operating loads between 24,375 and 27,500 lb.

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.




F-Type and C-Type Variable Spring Supports for an Acid Plant in Canada

August 4th, 2013 Comments off

F-Type and C-Type Variable Spring Supports for an Acid Plant in Canada

PT&P designed and fabricated F-type and C-type variable spring supports for an acid plant in Canada. The variables range from 4″-8″ in diameter and can accommodate between .039″– 5.02″ in movement. They are designed for an operating temperature of 200°F and operating loads between 509 lb. and 13,489 lb. The variable springs are coated with a red oxide coating to protect against corrosion and underwent standard and load travel tests prior to shipment.

Variable Spring Hanger and Structural Steel Assembly for a Solar Electric Generating System

October 28th, 2012 Comments off

Variable Spring HangersVariable Spring Hanger and Structural Steel Assembly

These variable spring hangers were designed for a 10″ pipe line in a solar electric generating system. All assemblies were fabricated from A-36 carbon steel with a hot-dipped galvanize finish. The picture on the left shows a structural steel assembly supporting a PTP-1 variable spring and a Fig.80 heavy 3-bolt clamp designed for a 3,789 lb. load. The picture on the right shows two PTP-2 variable spring hangers welded to a structural steel beam designed for a 675 lb. load. Each pipe hanger assembly went through standard load and travel testing prior to shipping.

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