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Variable Springs — The Pipe Supports Blog

Solution for Removing Travel Stops in Variable Cans with Heavy Loads

May 22nd, 2012 Comments off

For spring cans capable of 40,000 lb. or greater, we recommend you use jacking bolts to remove the travel stops. Visit our visual media section to learn the Solution for Removing Travel Stops at Heavy Loads.

New Spring Sizing Calculator

March 11th, 2011 No comments

Don’t know your cold / installed load? Use our new web-based spring sizing calculator to find all the springs that can fit your design parameters.

F-Type Variable Spring Supports for a Chemical Plant and Refinery in Singapore

December 20th, 2010 No comments
F-Type Variable Spring Supports

F-Type Variable Spring Supports

An assortment of standard variable spring supports were manufactured ranging in size from 8-5/8″ to 12-3/4″ dia. with installed heights ranging from 9-7/16″ to 18-1/8″. 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 1750 lb. with .02″ travel to 21,280 lb. loads with .13″ travel. 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.

Do you see a need for variable springs in your piping system? Let us price them for you!

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Constant Spring Supports vs. Variable Spring Supports

December 3rd, 2010 No comments

Ever wonder what makes a constant spring support different from a variable spring support? How does each one function? How do they support loads and allow for movement in a pipeline? Check out our new spring support article that provides all the answers to these questions and more.

F-Type Variable Springs with Slide Plates

F-Type Variable Springs with Slide Plates

Upthrust 200-U Type Constants for an Oil Refinery

Upthrust 200-U Type Constants for an Oil Refinery

 

 

Want to learn more about constants? Instantly view a past constants webinar now!


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F-Type Variable Springs with Fully Adjustable Travel Stops

August 18th, 2009 No comments

F-Type Variable Springs with Fully Adjustable Travel Stops

F-Type Variable Springs with Fully Adjustable Travel Stops

 

Piping Technology & Products, Inc. manufactured a variety of F-type variable springs with loads ranging from 526 lb. to 33723 lb. These variable springs are fabricated from a combination of carbon steel and A193-B7 CroMoly steel with A304 stainless steel slide plates. The variable springs are modified to include fully adjustable travel stops. The first purpose of the adjustable travel stops is to aid by distributing the load evenly during the installation process. The second purpose is to allow spring adjustment to any load within the operating range.

Do you see a need for variable springs in your project? Get pricing today!
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F-Type Variable Springs for a Local Chemical Plant

December 22nd, 2008 No comments
F-Type Variable Springs with Slide Plates

F-Type Variable Springs with Slide Plates

Pictured above are F-type variable spring supports designed for a local chemical plant. They are designed for a vertical movement of 1/8″ and an operating load ranging from 638 lb. to 2,612 lb. Fabricated using A-36 carbon steel components from our shop inventory, these variables include PTFE, 25% glass filled, slide plates to allow for translational movement. Each spring is preset to the specified installed load prior to shipment.

Do you see a need for variable springs in your plant? Get pricing today!
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7′- 6" Long Custom Variable Spring Hangers

November 21st, 2007 No comments
7'- 6" Long Custom Variable Spring Hangers

7'- 6" Long Custom Variable Spring Hangers

These variable spring hangers were custom designed per customer specifications for a power plant in Turkey. The pipe hanger assembly measures 7′- 6″ long and the diameter of the can measures 12″. The variable spring hanger is capable of 55,137 lb. of hot load and 63,339 lb. of cold load. The assembly allows for 1″ upward travel.

In order to achieve the required spring rate, PT&P utilized a set of stacked coils (5 5/8″ O.D.) nested inside a larger coil. This produced an overall spring rate of 9,235 lb/in. The upper and lower attachments were minimized to fit within the space requirements provided.

Do you see a need for variable springs in your application? Get pricing today!
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Variable Springs for a Project in Mexico

July 26th, 2006 No comments
Variable Springs for a Project in Mexico

Variable Springs for a Project in Mexico

Variable Springs for a Project in Mexico

Close Up of G-can

This Type G variable spring was manufactured for a Petrochemical Plant in Mexico. The Type G assembly is formed by welding two standard spring assemblies to the ends of a pair of channels. This type of assembly can accommodate unusually heavy loads, and is especially convenient for avoiding interference in spaces where headroom is limited.

Each spring assembly is loaded per the client’s specification at Piping Technology and Products manufacturing facilities. A travel stop is inserted and strapped in place to maintain the load for the assembly installation. In addition to banding the travel stops, the variables for this project required chained travel stops. The base style (F-Type) variables on this project were also required to have internal guides.

At Piping Technology and Products, Inc. we use PTP-1, PTP-2, PTP-4, PTP-6 and PTP-8 to designate the five standard coil arrangements to increase the working range of travel of variable supports.

Several types of variable supports were made for this particular project. They included Type A, Type B and Type F.

Do you require variable spring supports in your piping system? Get pricing today!
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March 2006 News

March 4th, 2006 No comments

Piping Technology & Products, Inc. Performed Field Services for a Power Generating Plant in Texas

PT&P was contracted to assist in the determination of pipe support maintenance at a power plant in Texas. The constant effort support springs with loads of excess of 9,500 lbs and the variable spring supports with loads of 450 lbs were marked for needing attention.

Inspecting Variable Springs for Performance

Cleaning Variable Spring Unit

Inspecting Variable Springs for Performance

Inspecting Variable Springs for Performance

PT&P’s objectives were to:

* Evaluate the pipe supports
* Determine state of performance
* Provide a plan of action
* Train personnel on-site to perform adjustments and replacement of supports or support components
* Provide final inspection of modified supports

After Cleaning & Preparation of the Constant

After Cleaning & Preparation of the Constant

Final Assembly with Added Slide Plates

Final Assembly with Added Slide Plates

The pipe supports needing attention could not be set to the required installation position. A plan was initiated to recondition some of the support components such as turnbuckles and rods. This would allow a greater range of field adjustment to the pipe supports. During a planned shut-down, PT&P Field Service Units returned to the site to modify the existing supports. The initial phase of the modifications included bracing the piping in order to isolate and lock the supports in position. Then, they were disconnected from the system and modifications to the assemblies were completed. Afterwards, the supports were reinstalled and any necessary adjustments were completed. A total of eight pipe supports were modified or adjusted.

Roller Bearing Needing Maintenance

Roller Bearing Needing Maintenance

Restored Roller Bearing

Restored Roller Bearing

Do you see a need for a routine inspection of your plant? Contact us for a quote today!
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PTP 1-140 Type F Positive Variable Springs for a Power Plant

September 21st, 2005 No comments
PTP 1-140 Type F Positive Variable Springs for a Power Plant

PTP 1-140 Type F Positive Variable Springs for a Power Plant

 

PTP 1-140 Type F Positive Variable Springs for a Power Plant

Rows of Variable Springs on Shipping Floor

All of the custom designed variables consist of a single flange with two spring supports in order to meet the customer’s height restrictions. These PTP1-140 Type F variable springs are fabricated from A36 carbon steel with an overall weight of 16,900 lbs. They are designed for upward movement of 0.079″ with a hot load of 4,490 lbs., and a cold load of 4,620 lbs.

Want to learn more about variable springs? View a past variable spring webinar now!




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