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Variable Springs — The Pipe Supports Blog

Eight Custom-Built Variable Springs for a Power Plant

June 3rd, 2005 No comments
Eight Custom-Built Variable Springs for a Power Plant

Eight Custom-Built Variable Springs for a Power Plant

All of the spring components are made of A4150H and carbon steel. Per customer’s request, a two coat epoxy paint was applied to the springs. The Type-A variable spring assemblies measure 22″ x 79″ with an installed load of 45,000 lb., operating load of 56,000 lb., and a downward travel of 5″. The Type-C assemblies measure 22″ x 89″ with an installation load of 38,000 lb., operating load of 47,000 lb., and a downward travel of 5 1/2″. Each spring coil was tested to insure the wire diameter, coil height, and spring rates.

Do you see a need for variable springs in your piping system? Get a price quote today!


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Spring Supports with PTFE, 25% Glass Filled, Slide Plates

March 11th, 2005 No comments
Spring Supports with PTFE, 25% Glass Filled, Slide Plates

Spring Supports with PTFE, 25% Glass Filled, Slide Plates

Piping Technology & Products, Inc. recently custom designed and manufactured 32 spring supports with PTFE, 25% glass filled, slide plates for a plant in China. The total weight of the spring supports supplied is 13,143 lbs. and they have a travel range of ¾”. These products support the vessel and the PTFE, 25% glass filled, slide plates allow height adjustment as well as mobility. These spring supports are designed for operating loads of 42,266 lbs. and were constructed of carbon steel.

Do you require spring supports or slide plates in your piping system? Get pricing now!
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Custom Variable Springs for Power Plant

October 8th, 2004 No comments
Custom Variable Springs for Power Plant

Custom Variable Springs for Power Plant

Custom Variable Springs for Power Plant

Rod & Clevis Assemblies

Piping Technology and Products, Inc. custom designed and manufactured variable springs to be used in conjunction with a rod and clevis assembly for a power plant in West Virginia.  Since the operating loads specified by the customer were greater than the maximum loads for the largest PT&P spring, custom units needed to be built for this application. The springs were fabricated using a large spring coil, normally only used in constant spring assemblies. The spring is 20 1/2″ in diameter and has a standing height of 51″. All components of the pipe hanger assembly were made from carbon steel and were supplied with a hot-dipped galvanized finish. The spring is 20 1/2″ in diameter and has a standing height of 51″.  The rods will be attached to type A variable springs designed to support loads from 850 lbs. to 13,300 lbs. Manufactured from A-36 carbon steel, the rods are 3/4″ to 2″ in diameter and range in length from 68″ to 95″.

To prevent contamination at high temperatures, a non-galvanized finish was applied to the rods per customer’s request. Prior to delivery, a 100% dye-penetrant test was preformed to ensure quality.  The variable springs were tested in the load cell to insure proper operation and also to set the cold load to the specifications as provided by the customer.

Want to learn more about variable springs? Instantly view a past variable webinar!


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6600 lb. load PTP-4 Type C Variable Springs with Riser Clamps

July 16th, 2004 No comments
6600 lb. load PTP-4 Type C Variable Springs with Riser Clamps

6600 lb. load PTP-4 Type C Variable Springs with Riser Clamps

PT&P recently designed and manufactured six, PTP-4-160 type C variable springs with riser clamps for an oil refinery in Texas.  These variable springs are constructed from carbon steel and designed to support loads of 6600 lb. with a total travel of 2″. The clamps are fabricated from A 387 Gr. 22 alloy steel to fit 18″ pipes. Dimensional and fit-up tests were performed on the variable springs and riser clamps prior to shipping.

Do you see a need for variable springs in your current or upcoming project? Get pricing!
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950 lb. Load PTP- 6 Type F Variable Springs for an Offshore Oil Rig

March 19th, 2004 No comments
950 lb. Load PTP- 6 Type F Variable Springs for an Offshore Oil Rig

950 lb. Load PTP- 6 Type F Variable Springs for an Offshore Oil Rig

Piping Technology and Products, Inc. recently designed and fabricated two 950 lb. load PTP-6 type F size 90 variable springs for an offshore oil rig.  These variable springs have an overall height of 33 1/2″ and are designed for a travel range of 4″. Each variable consists of an 8 5/8″ dia. casing, a 13″ square base plate, an 8″ load flange and three spring coils with a 7 1/2″ working range. All components are fabricated from carbon steel and are hot-dipped galvanized.

Want to learn more about variable springs? Instantly view a past variable webinar!


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PTP-6 Carbon Steel Variable Springs

November 7th, 2003 No comments
PTP-6 Carbon Steel Variable Springs

PTP-6 Carbon Steel Variable Springs

PT&P recently designed and manufactured PTP-6 Type G variable springs in size PTP 6-00-G for a power plant project in Colorado.  These variable springs are constructed from carbon steel with movement ranging from 1” to 2” and loads of 73 lbs and 52 lbs, respectively. They were tested prior to shipping for load and movement performance by using calibrated load cells.

Do you see a need for variable springs in your piping system? Get pricing today!


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1,520 Spring Assemblies for a Chemical Plant

July 18th, 2003 No comments
1,520 Spring Assemblies for a Chemical Plant

1,520 Spring Assemblies for a Chemical Plant

PT&P recently manufactured 1,520 PTP-2 and PTP-4 spring hanger assemblies designed specifically for a furnace application. These custom variable springs have welded components as opposed to bolted components found in standard assemblies. Due to the space limitation within the furnace, the spring coils were set in a welded housing which allows for the springs to be closely oriented within a smaller spatial envelope. The pipe hanger assemblies are made from carbon steel, consisting of variable spring, rod, and riser clamp components. Instead of galvanizing, the assemblies were coated with a red-oxide primer due to the high temperature operating conditions of the furnace. This prevents the possibility of molten zinc (from the galvanizing process) contaminating the furnace tubes.

1,520 Spring Assemblies for a Chemical Plant

1,520 Spring Assemblies for a Chemical Plant

The springs are designed for loads of 143 to 660 lbs. and for total travel ranging from 3/4 to 2″. Each assembly was pre-assembled to ensure free movement throughout the spring’s travel range before welding the bottom closure plate. Prior to shipment, all assemblies were calibrated to determine the exact spring rate and then were set to the customer’s designated cold load position. These springs are then located and installed into the furnace based on the spring rate.

Do you see a need for spring assemblies in your piping system? Get a quote today!

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Various Variable Support Assemblies for a Power Generation Facility

April 25th, 2003 No comments
Various Variable Support Assemblies for a Power Generation Facility

Various Support Assemblies for a Power Generation Facility

Piping Technology & Products, Inc. designed and manufactured 85 support assemblies for a power generation facility in Georgia.   These assemblies consisted of Variable and Constant Assemblies and structures made with carbon steel and alloy material. The variable spring hanger assemblies have standard three-bolt clamps and lug attachments for the existing pipes. These variable spring hangers accommodate operating loads varying from 8,000 to 18,000 lb. and 1-1/2 ” of upward travel. PT&P also manufactured a Fig.43 (heavy duty yoke u-bolt) for a 14″ diameter pipe. Components of the Fig. 43 include yoke, U-bolt, shield, and lug. The structure (beam, plate, angle, and tube steel) was painted green as per the customer’s specifications.

Want to learn more about variable springs? Watch a past variable spring webinar today!


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Variable Assemblies with Pre-Insulated Pipe Clamps

April 11th, 2003 No comments
Variable Assemblies with Pre-Insulated Pipe Clamps

Variable Assemblies with Pre-Insulated Pipe Clamps

Variable Assemblies with Pre-Insulated Pipe Clamps

Pre-Insulated Pipe Clamp

Piping Technology & Products, Inc. designed and manufactured several variable assemblies with pre-insulated pipe clamps for a chemical company in Texas. These assemblies are constructed of galvanized carbon steel hangers and hardware with Marinite® insulation.  The fabricated clamps range in size from 10″ to 30″, insulation thickness of 1″ to 8″ and with spring hanger sizes 80-180 standard, double, and triple variable spring hangers.

Do you require variable springs or pre-insulated pipe clamps? Let us price them for you today!
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Special Application Variable Springs and Constant Supports

March 19th, 2003 No comments
Special Application Variable Springs and Constant Supports

Special Application Variable Springs and Constant Supports

The three pictures above show materials being crated for shipment overseas. At the top center are pallets of variable springs designed for 10” of movement and 1000 pound load. This unusual combination of requirements is satisfied by an unusually long coil. This project required 700 of these variables. At the bottom center are constant supports designed for 14” of movement with loads near 2000 pounds. This large movement, unusual for this load, requires the large arc seen in the frame of the constant body. Two hundred of these constants were required. These spring supports are painted with a shop prime.

Do you see a need for variable or constant springs in your piping system? Get pricing today!

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