Variable Spring Supports Designed for a Highly Corrosive Environment in Peru

July 1, 2019

Variable Spring Supports Designed for a Highly Corrosive Environment in Peru

Type: Variable Spring Supports w/ PTFE Slide Plates
Size: PTP-4 | 9.5″ – 11.5″ Height
Design: 1/8″ Upward & 3/16″ Downward Travel
Material: HDG Carbon Steel | Gloss Aliphatic Polyurethane Topcoat | PTFE, 25% Glass Filled Slide Plates
Testing: Standard Load Testing & Q.C. Inspection

Piping Technology & Products, Inc. recently designed and fabricated F-type variable spring supports for a plant in Peru. The variables are fabricated from carbon steel, hot-dipped galvanized and a gloss aliphatic polyurethane topcoat was applied for corrosion protection. PTFE, 25% glass filled, slide plates are bonded to the top of the load flange to reduce the friction caused by lateral movement. The variables range from 9.5″ to 11.5″ in height and are designed for a travel range of 1/8″ upward to 3/16″ downward. To ensure quality, standard load testing was performed prior to shipping.

Variable Spring Hangers Designed for a Plant in Texas

April 22, 2019

Variable Spring Hangers Designed for a Plant in Texas

Type: B-Type Variable Spring Supports
Size: PTP 100 & 200 | 3′ – 8′ ft. Height
Design: 4,000 lb. – 17,000 lb. Loads
Material: HDG Carbon Steel | Neoprene Coated Springs
Testing: Standard Load Test | Q.C. Tests

Piping Technology and Products, Inc. recently designed and fabricated B-Type variable spring supports for a plant in Texas. The operating loads range from 4,000 lb. to 17,000 lb. The variable springs are fabricated from galvanized carbon steel, have neoprene coated steel spring coils, and are designed to operate in environments up to 750°F. They have an overall height range from 3 ft. to 8 ft″. To ensure quality, standard load tests were performed prior to shipment.

Variable Springs for a Propane Dehydrogenation Unit in Texas

November 5, 2018

Variable Spring Supports for a Propane Dehydrogenation Unit in Texas

Type: Variable Spring Supports
Size: Accommodate Elevation Difference up to 11′-5″
Material: Carbon Steel | Hot-dipped Galvanized
Design: 20,000 lb. Load | 4,700 lb./in. Spring Rate

PT&P designed and manufactured over 50 variable spring supports for a propane dehydrogenation unit in Texas. The spring cans, rods, welded beam attachments, turnbuckles and clevises are fabricated from hot-dipped galvanized carbon steel. The variables can accommodate an elevation difference up to 11’-5” from the bottom of the steel to the connection of the pipe. They were designed for an operating load of 20,000 lb., a spring rate of 4,700 lb./in. and 0.007” upward movement. Standard load testing was conducted prior to shipping.

F-Type Variable Spring Supports with Graphite Slide Plates Designed for an Oil Refinery

September 24, 2018

F-Type Variable Spring Supports with Graphite Slide Plates Designed for an Oil Refinery

Type: Variable Spring Supports with Graphite Slide Plates
Materials: CS | HDG | High Heat Aluminum Finish | Graphite
Load Range: 420 lb. to 7650 lb. | 0.65″ Upward Movement
Design: 700°F Temperature | Q.C. & Load Tests

PT&P custom designed an F-type variable spring supports with graphite slide plates for an oil refinery in California. Each assembly is equipped with round base plates (instead of the standard square plates), and are designed for temperatures up to 700°F. The spring cans are designed for a load range from 420 lb. to 7,650 lb. and movements up to 0.65” up. They are finished with high heat aluminum due to the temperature requirements. O.C. inspections and load tests were conducted prior to shipment.

Variable Springs Designed for a High Temperature Furnace Application

July 23, 2018

PT&P Custom Designed Furnace Spring Support Cans For Chemical Plant

Type: Variable Spring Supports – Furnace
Material: Carbon Steel w/ Red Oxide Primer
Design: 1,261 lb. Load | 9″ Vertical
Testing: Load and Travel Tests

PT&P custom designed and fabricated variable spring supports for a furnace application at a chemical plant in California. The furnace cans are carbon steel and painted with red oxide primer to avoid any potential hazards, where exposed to high temperatures. The springs are designed for an operating load of 1,261 lb., with movement of 9” and dimensions of 6″ x 52″ in length. Load tests were performed prior to a 12-14 week shipment.

Variable Springs with Clevis Hangers for an Ethylene Cracker Plant

June 4, 2018

B-Type Variable Spring Supports with Clevis Hangers for an Ethylene Cracker Plant in Texas

Type: Variable Spring Supports with Clevis Hangers
Material: A36 Carbon Steel | 304 Stainless Steel
Design: 800°F | 619 lb. Ld. | 0.5″ Up Travel
Testing: Load and Travel Tests

Piping Technology & Products designed these B-Type variable spring supports with clevis hangers for an ethylene cracker plant in Texas. The variable spring supports, threaded rods, and hex nuts were fabricated from A36 carbon steel and the clevis hangers from 304 stainless steel. The assemblies are 83-1/8″ in length and the spring size is 6-80-B. They are designed for an operating temperature of 800°F, an operating load of 619 lb, and 0.5″ of movement. Standard load and travel tests were performed prior to shipment.

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

January 2, 2018

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 27, 2017

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.

How to Install a D-Type Variable Spring Support

October 10, 2017

View our installation procedure for our D-Type variable spring supports.

Spring Loading Procedure for Standard Variable Springs

View our loading procedure for standard variable springs. See how we test the variable springs prior to being shipped.

Variable Spring Supports Product Video

Variable Spring Supports for a Furnace application at an Ammonia Plant

August 7, 2017

Variable Spring Supports for a Furnace application at an Ammonia Plant

Type: Variable Spring Supports
Material: Carbon Steel | Red-Oxide Primer | 304 SS
Design: 3,000 lb./in.
Testing: Load Test

PT&P custom designed variable spring support assemblies for a furnace application at an ammonia plant. The furnace springs are fabricated from carbon steel and painted with a red-oxide primer to help prevent corrosion. The pipe clamps are fabricated from 304 stainless steel. They are designed to support a cold load of almost 3,000 lb./in. while operating in an area where temperatures are higher than ambient. There were a total of 173 assemblies fabricated for this project, 152 variable hangers, 3 constant spring supports, 6 ball joint rigid struts, and 12 rigid rod hangers. Special load tests were performed prior to shipping.

F-Type Variable Springs for a Refinery in Oklahoma

June 26, 2017

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.

Type-C Variable Assemblies with Dual Travelers for a De-coker Unit

December 22, 2016

Type-C Variable Assemblies with Dual Travelers for a De-coker Unit

Type: Variables with dual travelers
Design: Operating load: 1,698-21,756 lbs
Material: A36 Carbon Steel with HDG finish
Size: Horizontal Travelers range from size 2 to size 4

These dual travelers with Type-C variable spring hanger assemblies were custom designed by Piping Technology & Products for valves in a de-coker unit in Texas. All completed assemblies were fabricated from A36 carbon steel with an HDG finish. The travelers range from size 2 to size 4 and are designed for 12″ of horizontal movement. The variables are designed for an operating loads ranging from 1,698-21,756 lbs.

Variable Spring Supports Product Video

August 10, 2016

G-Type Variable Spring Assemblies Designed for an Oil & Gas Refinery in Texas

August 6, 2016

G-Type Variable Spring Assemblies Designed for an Oil & Gas Refinery in Texas

PT&P designed these G-Type variable spring support assemblies, along with a 24” pipe shoe and hanger for an oil and gas refinery in Texas. Each item is designed with a center to center of 36” and an elevation difference up to 72”. The spring supports consists of a G-type variable spring, all threaded rod, clevis, lifting lugs, welding lugs and clevis pins. They are designed with an operating load range from 1,700 lb. to 10,500 lb. and a movement range of .02” to .19” up or down. Standard load and travel testing was completed prior to shipment.

Big Ton Spring Supports Designed for Propane Dehydrogenation Facility

June 27, 2016

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.

Variable Spring Support with Bronzphite® Slide Plates Designed for a Facility in Canada

May 23, 2016

Variable Spring Support with Bronzphite® Slide Plates Designed for a Facility in Canada

PT&P manufactured these F-type variable spring supports for a facility in Canada. The springs are fabricated from A36 carbon steel with a hot-dipped galvanized finish. The variables installed heights range from 11″ to 15″ and are designed for operating conditions up to 4,000 lb. Bronzphite® is best suited for high loads, low velocity applications and where the use of oil or grease is undesirable or unfeasible. The bronze plate acts as the bearing surface, withstanding heavy loads, while the graphite inserts provide a solid, oil-free lubricant. 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.

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

April 25, 2016

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.

Sign-up for our next Webinar on Variable Spring Supports

February 11, 2016

This webinar is over, view the recording in our webinar archives

Variable Spring Support Design, Size Selection, Installation & Maintenance Webinar

This Webinar will focus on the different types of variable spring supports and big ton variable spring supports. Learn about the special features available, in addition to the design of a variable support. View how the different coil configurations produce a unique response to an applied load and see how a spring assembly is loaded. Discover the basic steps in selecting a hanger design and the step by step process used to size a spring for your application. Learn about the different attachments, testing, and installation and maintenance procedures. View examples of failed supports provided by our Field Service Division and learn why they failed and how to prevent it. Gain knowledge of the valuable tips used when deciding to replace or re-calibrate a variable spring support, as well as adjustments, shutdown and isolation procedures.