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Variables — The Pipe Supports Blog

Custom All Stainless Steel Variable Spring Supports for a Floating LNG Platform in Singapore

January 2nd, 2018 Comments off

Custom All Stainless Steel Variable Spring Supports for a Floating LNG Platform in Singapore

Type: Variable Spring Supports
Material: Alloy 2205 Duplex/SAE 5160H
Design: Operating Load up to 3,597 lbs./Operating Temperatures of -15-200°F
Testing: Standard Load & Travel Tests

PT&P manufactured these custom variable spring supports for a floating LNG platform in Singapore. The spring housings are fabricated with alloy 2205 duplex and the coil manufactured from – SAE 5160H. The variables installed heights that range from 10-3/4” to 12–1/16” and are designed for an operating load up to 3,597 lbs. Also load test dye penetrate test was performed operating temperatures of -15°F. These variable springs are also designed to suit a high corrosive environment. They can operate in temperaturs ranging from -14-200°F without compromising its load carrying capacity.

A-Type Variable Spring Supports for a Process Power Plant in Oklahoma

November 27th, 2017 Comments off

A-Type Variable Spring Supports for a Process Power Plant in Oklahoma

Type: Variable Spring Supports
Size: Rod Diameter 2” / Casing 8′ long & 3 1/8” Diameter
Material: Carbon Steel
Design: Operating Load 31,563 lbs., Installed Load 29,000 lbs., 0.82″ Downward Movement
Testing: Standard Load & Travel Tests

PT&P designed two standard PTP-4 size 210 A-type variable spring supports for a Process Power Plant in Oklahoma. The springs are fabricated from A36 carbon steel and with a hot-dipped galvanized finish. The springs are designed to accommodate a Hydro Test Load of 34,000 with operating Load of 31,563 and installed Load of 29,000, movement of 0.82″ downward. A Standard Load and Travel test was conducted on the variables prior to shipment. The springs utilize a rod diameter of 2” and the spring casing 8′ long and 3 1/8” in diameter.

F-Type Variable Springs for a Refinery in Oklahoma

June 26th, 2017 Comments off

F-Type Variable Spring Cans for a refinery in Oklahoma

Type: Variable Spring Supports
Size: 70 7/8″ tall and 17 3/4″ wide
Material: Carbon Steel and PTFE Slide Plates
Design: 30,980 lb. load/2,083 lb. spring rate
Testing: 35,000 lb hydrotest

PT&P manufactured variable spring supports for a refinery in Oklahoma. These F-Type PTP-6 spring cans are 70 7/8″ tall and 17 3/4″ wide. They are completely fabricated from carbon steel with PTFE slide plates welded on the load flange and internal guide. They are designed for an operating load of 30,980 lb. .with a spring rate of 2,083 lb./in. and 0.49″ of movement. These variables were hydrotested with a load of 35,000 lb. prior to shipment.

Variable Spring Supports Designed for a Furnace in Trinidad

February 21st, 2017 Comments off

Variable Spring Supports Designed for a Furnace in Trinidad

Type: F-Type Variable Spring Supports (Furnace Springs)
Material: Carbon Steel | Red Oxide Primer
Design: Movement: 1/2 “| Load: 398 lb. | Spring Rate: 84 lb./in.
Testing: Standard Spring Rate & Calibration Tests

PT&P designed and manufactured these F-Type variable spring supports for use in a furnace at a facility in Trinidad. We manufactured these furnace springs for an operating load of 398 lb., a movement up to 1/2″, and a springs rate of 84 lb./in. They are fabricated from carbon steel with a red oxide primer coating to protect against corrosion. Customer specifications required a modified, installed height, while maintaining the spring rate, operating load and install load. In order to accomplish this, PT&P designed, manufactured and attached, to each spring, a pedestal to accomplish the increased installed height.

PT&P Variable Spring Supports

January 10th, 2017 Comments off

Variable Spring Hangers Designed for an Ammonia Plant

January 9th, 2017 Comments off

Variable Spring Hangers Designed for an Ammonia Plant

Type: B-Type Variable Spring Hanger
Size: PTP-2 Standard Variable Spring
Material: Hot-dipped Galvanized Carbon Steel
Design: 0.955″ Downward Movement | Cold Load: 12,183 lb. | Hot Load: 14,723 lb.
Testing: Hydro-load Test: 15,750 lb.

PT&P designed and fabricated variable spring hangers for an Ammonia Plant in Louisiana. This B-Type PTP-2 variable hanger is fabricated from carbon steel and hot-dipped galvanized to protect against corrosion. The variable is designed for 0.955″ of downward movement and an installed load of 12,183 and an operating load of 14,723 lb. This variable included a 1″ forged steel clevis and the assembly was tested at a hydro-load of 15,750 lb.

Variable Spring Supports Designed for a Furnace Application in Oklahoma

September 26th, 2016 Comments off

Variable Spring Supports Designed for a Furnace Application in Oklahoma

Type: Variable Spring Supports
Design: 1,765 lb. Load | +/- 5% Spring Rate
Material: Carbon Steel with Red Oxide Primer
Testing: Standard Spring Rate & Calibration Tests

PT&P custom designed variable spring supports for a furnace application at a Nitrogen Facility in Oklahoma. The furnace springs are fabricated from carbon steel and painted with a red-oxide primer to help prevent corrosion. The spring supports are designed to support loads up to 1,765 lb. With a spring rate calibrated to be within +/- 5% of the theoretical value.

Variable Spring Supports Product Video

August 10th, 2016 Comments off

Big Ton Spring Supports Designed for Propane Dehydrogenation Facility

June 27th, 2016 Comments off

Big Ton Spring Supports Designed for Propane De-Hydrogenation Facility

PT&P custom designed big ton spring supports for a propane dehydrogenation facility in Texas. The components within these assemblies include the spring housing, load columns, travel stops, spring coils and lifting lugs. While both assemblies measure 42” x 24” x 26-1/2”, they were each modified based on independent specifications for operating loads and movement. The first will accommodate a load of 94,261 lb. and 0.085” of movement, while the second will accommodate a load of 102,219 lb. with 0.08” of movement.

This type of support is ideal for applications, such as pressure vessels, that combine very heavy loads with thermal expansion because of the stability they provide. The big tons were tested in the load cell to insure proper operation throughout the entire working range of the coils.

300 Variable Spring Supports Designed for a Furnace Application at a Methanol Processing Facility

April 25th, 2016 Comments off

300 Variable Spring Supports Designed for a Furnace Application at a Methanol Processing Facility

PT&P designed and fabricated 300 variable spring supports for use in a furnace within a methanol processing facility in Mexico. We manufactured the ”housing” of these variable springs using seamless pipe (in order to prevent the springs’ coils from rubbing against the ”weld seam” of a standard pipe) so that the exact spring rate (+/- 5%) can be calculated without discrepancies or variations. The reason that an accurate spring rate is important is because furnace springs function as a ”scale” in order to determine the weight of the radiant coils within the unit. These springs are coated with red oxide primer to protect against corrosion. We manufactured these furnace spring assemblies for an operating load of 1,036 lb. and a movement up to 8 1/2″. Each spring is traceable to test data and tagged with its’ unique spring rate along with other standard information use for identification.

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