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Engineered Spring Supports — The Pipe Supports Blog

63″ x 63″ Big Ton Springs for an Oil Refinery

April 14th, 2008 No comments
63" x 63" Big Ton Springs for an Oil Refinery

63" x 63" Big Ton Springs for an Oil Refinery

The base measures 63 inches square while the top load flange measures 55 inches square. One of the springs has an overall height of 22-7/16″ and the other an overall height of 28-5/8″. Both big ton springs are custom designed and fabricated from carbon steel with a hot-dipped galvanized finish. The top of the load flange is covered by a stainless steel slide plate. These big ton springs will be used to support heavy (in excess of 100,000 lb.) loads where a standard variable spring would be undersized.

One of the big ton springs is designed with a operating load of 126,000 lb. and the other with an operating load of 225,000 lb. Prior to fabrication, all of the coils, within the frame, were individually tested to insure correct spring rate and load capacity. After the units are fabricated, the entire assembly is tested throughout the entire load/travel range.

Do you require a similar spring support in your piping system?  Let us price it for you now! 
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23″ Modified F-Type Variable Springs with Rollers

January 16th, 2008 No comments

23" Modified F-Type Variable Springs with Rollers

23" Modified F-Type Variable Springs with Rollers

PT&P custom designed and fabricated these F-type variable springs with rollers to be used in a refinery in Kansas. The variables are fabricated from carbon steel with a stainless steel clamp-on shoe that attaches to the load column. These F-type variable spring assemblies measure 23″ in height and have an upward travel of 3″. The operating load is 1,000 lb. and the installed load is 1,300 lb. The function of this custom designed variable spring is to allow large axial movement along the axis of the pipe centerline. The load column is modified to accommodate the special clamp-on shoe. The customized wheels allow for movement of the entire spring assembly in conjuction with the pipe.

Do you require variable springs for a similar application? Get a price quote 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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80" U-Type Constants for a Power Plant

October 10th, 2007 No comments
80" U-Type Constants for a Power Plant

80" U-Type Constants for a Power Plant

– U-Type constant spring supports for a power plant in Thailand
– Fabricated from A36 carbon steel
– Dimensions = 25″W x 28″H x 80″L
– Load = 24,000 lb.
– 3″ of total travel upward
– Standard load and travel testing was performed

Want to learn more about constant springs? Instantly view a constant webinar today.


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43" Angulating Constants for a Power Plant

August 29th, 2007 No comments
43" Angulating Constants for a Power Plant in Utah

43" Angulating Constants for a Power Plant in Utah

The design of this constant requires that it be connected by pins from the top and from the bottom to allow it to angulate. The constant assemblies are fabricated from A36 carbon steel. The constants measure between 23″ and 43″ in length with a take-off between 29″ and 55″. The load range is 60 lb. to 2,605 lb. and each constant assembly underwent standard load and travel testing.

Do you see a need for constants in your plant or refinery? Get pricing 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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Upthrust U-Type Constant for an Energy Plant

January 3rd, 2007 No comments
Upthrust U-Type Constant for an Energy Plant

Upthrust U-Type Constant for an Energy Plant

Piping Technology & Products, Inc. Designed and Fabricated a Upthrust U-Type Constant for an Energy Plant in California

– Designed for a constant load of 7,733 lb.
– Travel ability is from 0 to 9 inches of total travel
– The constant’s shipping and installation setup is for downward travel
– The constant spring support has been custom designed to reduce its take-off from 36 7/8″ to 29 1/2″

Do you have a need for u-type constants in your plant? Get pricing today!
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Big Ton Springs used in a Chemical Processing Plant

November 1st, 2006 No comments
Big Ton Springs used in a Chemical Processing Plant

Big Ton Springs used in a Chemical Processing Plant

Big Ton Springs used in a Chemical Processing Plant

Stainless Steel Slideplates on Big Tons

The limiting constraint in designing and fabricating these big ton spring supports was to maintain an overall height less than 15-3/4″ and still allow the load table to travel downward during operation. Whereas a standard PT&P size 2-190 variable springs would have been sufficient to hold the load specified, the coil alone was taller than the space available at site. For this reason, a “big ton” design was implemented which utilized six smaller coils (2-130 size) working in parallel to produce the required load-carrying capability and spring rate.

All of the frame/housing components were made from carbon steel and supplied with an HDG finish. The travel stop rods were made of A-193 Gr. B7 material and were painted red. The slide plates sitting atop the load flange were made of polished A-304 stainless steel.

Both “big ton” assemblies are 30″ wide by 30″ deep by 15-3/4″ tall. Overall spring rate is 3,600 lb/in. and each weighed approximately 1,460 pounds. The installed (cold) load = 14,800 lbs. and the operating (hot) load = 16,075 lbs. Movement from cold to hot = 0.354″ down.

Tested in the load cell to insure proper operation throughout the entire working range of the coils, the “big tons” were then set to the cold (installed) load as specified.

Want to learn more about big ton springs? Watch one of our engineered spring webinars now!




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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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100 Type F Vertical Constant Supports

August 30th, 2006 No comments

 

100 Type F Vertical Constant Supports

100 Type F Vertical Constant Supports

These are constants known as 100 type F vertical constant supports. They support pipe from below by means of a sway strut. They are fabricated from A36 carbon steel and hot dipped galvanized to prevent rusting. The constant in the first picture maintains a constant load of 7,000 lb. while the constant in the second picture maintains a load of 9,000 lb. on the pipe throughout its 4” of total travel. They are 36” high with two gussets at the base plate to prevent the coil housing from collapsing under test loading and normal operation. Standard load and travel testing was performed on the constant to insure proper field operation.

Want to learn more about constants? Watch an engineered spring support webinar now!



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