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Constant Spring Supports — The Pipe Supports Blog

Constant Spring Supports Designed with Special Lugs for Connecting to a Trolley

April 4th, 2011 No comments

Constant Spring Supports Designed with Special Lugs for Connecting to a Trolley

These PT&P 200 series constants are fabricated from A36 carbon steel. The 200-A constants measure 18.5″w x 20″H x 65″L and will support a 22,200 lb. load. They are modified to avoid interference with the structure by shortening the frame. The 200-C constants measure 18.5″w x 29″H x 80″L and will support a 32,000 lb. load. The constants have specially fabricated lugs to allow for a 3 ton trolley to connect with it.

Do you have a need for constants in a current or upcoming project? Let us price them for you! access-our-webinar-archives

100-C Constant Spring Supports with Double Lug Suspension and Chained Travel Stops for an Oil Refinery in Canada

January 31st, 2011 No comments

100-C Constant Spring Supports with Double Lug Suspension and Chained Travel Stops for an Oil Refinery in Canada

These figure 100 C-type constant springs were manufactured from A36 carbon steel for an oil refinery in Canada. Each constant was designed for 7″ of travel with a load of 35,144 lb. They measure 21.5″ W x 42″ L x 80″ H, and were specially designed to match a competitor’s dimensions in order to fit in the required application.

Do you require constant spring supports for your piping system? Get pricing today!

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Constant Spring Supports with Corrosion Resistant Coating Manufactured on a Rush Basis for Off-shore Drilling in Malaysia

January 17th, 2011 No comments
Fig. 200 C-Type Constants

Fig. 200 C-Type Constants

Fig. 200 U-Type Upthrust Constants

Fig. 200 U-Type Upthrust Constants

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A “U-Type” and 6 “C-Type” constant spring supports were designed to support piping in a corrosive environment located off-shore in Malaysia. The U-Type measures 21″ x 25″ x 57″ and C-Types range in size from 11-5/8″ x 17″ x 4″ to 18-3/4″ x 32″ x 80″.

Constant Spring Supports with Corrosion Resistent Coating

The constants are fabricated from A36 carbon steel with a fluorocarbon coating on the pins. The frame, housing, and all components were coated with a 3-coat paint system to resist corrosion. Standard load and travel tests were performed prior to shipping the constants on a rush basis.

Want to learn more about constant springs? Instantly view a past webinar on constants now!
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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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Replacement Constant Spring Supports with Neoprene Coating for a Highly Corrosive Application at a Salt Water Cooler Tower

October 19th, 2010 No comments
Original Supports (not fabricated by PT&P)

Original Supports (not fabricated by PT&P)

PT&P received a call to inspect spring supports in operation at a salt water cooler tower. It was quickly determined that replacement supports would be needed due to the heavy corrosion of the original supports not fabricated by PT&P.

Neoprene Coated Fig. 200 U-Type Upthrust  Constant Spring Supports

Neoprene Coated Fig. 200 U-Type Upthrust Constant Spring Supports

A total of 40 constant and variable spring supports were fabricated as replacements. Each support was sealed with a neoprene coating over a hot-dip galvanized finish instead of stainless steel. This type of finish will ensure a much longer life-span. The spring supports ranged in loads from 800 lb. to 15,000 lb. with various travel ranges.

Neoprene Coated Fig. 100 U-Type Upthrust Constant Spring Supports

Neoprene Coated Fig. 100 U-Type Upthrust Constant Spring Supports

Do you need to replace some springs in your plant? Contact us for a quote today!
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How To: Remove Travel Stops from a Constant

October 8th, 2010 No comments

Check out this video of our field service manager instructing how to remove travel stops from a constant effort support. This procedure is a very critical and necessary step in the installation of constant spring supports.

More helpful instructional videos are available on our website!

Special U-Type Constant Spring Supports

January 19th, 2010 No comments
Special U-Type Constant Spring Supports

Special U-Type Constant Spring Supports

PT&P designed a constant load support system for a fluid tank with a load of 105,000 lb. over an area of 5′ W x 20′ L. To prevent twisting of the fluid container, the support system is designed to allow for “level” vertical movement. This was achieved by using a special system composed of three U-Type constant units. Each unit employs two springs working in parallel with a common large base plate and a load flange to support the entire 5′ width of the container.

Special U-Type Constant Spring Supports

The constants will support loads of 39,000 lb., 36,000 lb., and 30,000 lb., with a total travel of 4″ in the “upwards” direction. The spring coils were coated in neoprene, and all the other major components were hot dip galvanized to inhibit corrosion. These constants were constructed primarily from carbon steel with the use of stainless steel and PTFE, 25% glass filled slide plates.

Want to learn more about constant springs? Instantly view a past constant webinar today!
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200-C Type Constants for a Steam Plant

July 29th, 2008 No comments
200-C Type Constants for a Steam Plant

200-C Type Constants for a Steam Plant

 

200-C Type Constants for a Steam Plant

Close-Up View

These 200-C type constants are fabricated from A-36 carbon steel and are designed for a load ranging between 17,800 lb. and 25,600 lb. The constants have a downward travel ranging between 12 1/2″ and 16″. This support maintains a constant load throughout the designed travel. The diameter of the spring coil housing is 21″. The design includes a universal locking device capable of locking the hanger rod at any desired position. It also includes lifting lugs that aid in installing the constant in the field. Standard load and travel testing was performed before shipping to a steam plant.

Do you require constant supports in your piping system? Get a price quote today!

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U-Type Upthrust Constant Supports

April 25th, 2007 No comments
U-Type Upthrust Constant Supports

U-Type Upthrust Constant Supports

U-Type Upthrust Constant Supports

U-Type Upthrust Constant Supports

These U-type upthrust constant supports are designed to handle 6″ of total travel and loads of 5,677 lb. and 4,956 lb. The load flange is modified to hold six ball transfer units for each support. The ball transfer units are used to decrease the coefficient of friction to 0.05 compared to using the standard PTFE, 25% glass filled, which is 0.15.

U-Type Upthrust Constant Supports

Ball Transfer Units

Gussets are added under the load flange to maintain a leveled surface and an equal load transfer to all ball transfer units. These custom designed constant supports are manufactured for steam power plant superheaters.

Want to learn more about upthrust constants? Instantly view a constant webinar!


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Constants Designed to Customer’s Requirements

October 11th, 2006 No comments
Constants Designed to Customer's Requirements

Constants Designed to Customer's Requirements

200-U Type Constant-Custom Design
- Designed for 21,269 lb. load
- 26-1/4″ W x 80″ L x 28-1/2″ H
- 10″ upward travel
- 12″ total travel

Constants Designed to Customer's Requirements

200-U Type Constant

200-U Type Constant
- Designed for 18,273 lb. load
- 26-3/8″ W x 66″ L x 23-1/4″ H
- 0.43″ downward & 1.22″ upward travel
- 3″ total travel

Constants Designed to Customer's Requirements

100-G Type Constant

100-G Type Constant
- Load range: 15,226 lb. to 17,210 lb
- 13″ W x 87″ L x 59″ H
- 2.8″ downward travel
- 4″ total travel

Constants Designed to Customer's Requirements

200-U Type Constants

200-U Type Constant-Custom Design
- Load Range: 14,060 lb. to 18,334 lb.
- 27″ W x 84″ L x 24-5/8″ H
- Actual Travel Range: 10″ to 11″ Upward
- Total Travel Range: 12-1/2″ to 13-1/2″

Do you see a need for constant spring supports in your plant? Get pricing today!
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