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Variables — 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.

G-Type Variable Spring Supports Designed for a Coker Replacement Project

April 12th, 2015 Comments off

G-Type Variable Spring Supports Designed for a Coker Replacement Project

PT&P fabricated PTP-6 G-type variable spring supports for a coker replacement project in Kansas. 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. They are 50″ in length, designed for an operating load of 15,000 lb. and fabricated from carbon steel with a hot-dipped galvanized finish. All variable assemblies underwent standard load and spring testing prior to shipment.

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.

Variable Spring Supports Custom Designed for a Furnace Application in an Ammonia Plant

July 28th, 2014 Comments off

Variable Spring Supports Custom Designed for a Furnace Application in an Ammonia Plant

PT&P custom designed variable spring supports for catalyst tubes in a furnace for an ammonia plant in Canada. The furnace springs are fabricated from carbon steel and painted with a red-oxide primer to help prevent corrosion. This project required special coils that were within +/- 5% of the calculated spring rate. Over 245 springs underwent calibration test prior to shipment. PT&P has been supplying furnace springs for over 25 years and can customize them to meet your specifications.

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.

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.

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.

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.




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