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Constant Springs — The Pipe Supports Blog

46 Constants for Hydrogen Reformer

November 26th, 2004 No comments
46 Constants for Hydrogen Reformer

46 Constants for Hydrogen Reformer

Piping Technology & Products, Inc. custom designed and manufactured 46 PTP 100-C size 50 constants for a hydrogen reformer in Chile. The constants measure 30 x 48, designed for a vertical travel range of 11 and an operating load capacity of 2,600 lbs. They are fabricated out of A36 carbon steel. To ensure quality, standard load and travel tests were performed prior to shipping.

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49,000 lb. Load Constant Springs for a Power Plant

March 5th, 2004 No comments

49,000 lb. Load Constant Springs for a Power Plant

49,000 lb. Load Constant Springs for a Power Plant

Piping Technology and Products, Inc. custom designed and manufactured four double lug suspension PTP 100-C size 84 constants for a power plant in South Carolina.  These constants are designed for a vertical travel range of 5″ and an operating load capacity of 49,000 lb. They are fabricated out of A36 carbon steel and weigh 2,900 lb. each. Prior to shipping standard load and travel tests were performed on these 20″x 35″x 80″ constants to ensure quality.

Do you see a need for constant springs in your piping system? Get pricing today!
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950 lb. load C-type Constants

September 26th, 2003 No comments
950 lb. load C-type Constants

950 lb. load C-type Constants

PT&P recently designed and manufactured sixteen PTP-200 C-type constants modified to fit in constricted areas near a furnace of a chemical facility.  These constants are designed to travel from 5 1/2” to 19” and are specified to carry loads ranging from 245 to 924 lbs. They were fabricated from A36 plates with 4140 pins. Due to the proximity of the pipes and other equipment, the front part of the constant frame was cut to allow the pipe to move freely. Load and travel testing was performed to ensure quality and precise performance.

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



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Emergency Request for Types B & E Stainless Steel Constants

May 30th, 2003 No comments
Emergency Request for Types B & E Stainless Steel Constants

Emergency Request for Types B & E Stainless Steel Constants

Within a two-week span, PT&P designed and fabricated eight Stainless Steel, grade-304, types B & E Constants for a marine plant. These constants have a travel of 1 1/2 – 5″ and are specified to carry 50 – 1540 lbs load. Stainless steel was requested due to the corrosive nature of the environment. PT&P also manufactured nine Carbon Steel types B & E Constants for this project.

Do you require consants in your current or future project? Let us price them for you today!


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17,000 lbs. Upthrust Constants for a Construction Site

April 18th, 2003 No comments
 17,000 lbs. Upthrust Constants for a Construction Site

17,000 lbs. Upthrust Constants for a Construction Site

 17,000 lbs. Upthrust Constants for a Construction Site

17,000 lbs. Upthrust Constant

Piping Technology & Products, Inc. designed and manufactured sixty nine Upthrust Constants for a construction site in Chad, Africa.  They range in constant size from 31-61 and are composed of A36 carbon steel. The applicable loads and travel for these constants are from 1,700 lbs.-17,000 lbs. and 3”-8”, respectively. The installed height for this job was much higher than our standard constants, so we had to customize them. By extending the height of our standard constant with an additional angle we were able to meet the installed height.

Want to learn more about constant springs? View a past constant spring webinar 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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18,500 lb. Load Constants for a Construction Site

February 21st, 2003 No comments
18,500 lb. Load Constants for a Construction Site

18,500 lb. Load Constants for a Construction Site

The constants are made from A36 carbon steel and range in height from 4′-0 to 5′-0 and C-C dimension of 7′-0 to 8′-4.  They have a load capacity of 12,000 lbs. to 18,500 lbs. and a 4-5 travel capacity. Load setting and travel testing was conducted on the constants to ensure they met the customer’s requirements.

Want to learn more about constant springs? View a past webinar today!



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70,000 lb. Load Vertical C-Type Constants

December 13th, 2002 No comments

70,000 lb. Load Vertical C-Type Constants

70,000 lb. Load Vertical C-Type Constants

These 42 13/16″ x 79 5/8″ constants have a double suspension and are made from A36 carbon steel. They will each hold a total of 70,000 lbs. and are designed to move 8½ in. down. Our report generating testing was conducted after the correct load was set.

Do you see a need for constants in your current or future project? Get pricing now!


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Vertical F-Type Constants for Power Plant

July 19th, 2002 No comments
Vertical F-Type Constants for Power Plant

Vertical F-Type Constants for Power Plant

Piping Technology & Products custom designed and manufactured vertical F-type constants for a power plant in Connecticut.

The 100 type F is a vertical constant designed to support piping from below with minimum space usage. The dimensions of the constant are 26-5/8″ high, 10″ wide, and 17-9/16″ long with an operating load of 280 lbs.

This particular F constant, was unusual in that it was furnished with a vertical spring that attaches below the frame of the constant. In addition to a downward travel of 3″, the flange table shifts forward at 1-3/8″ to minimize axial movement.

A galvanized finish was applied to the constant to prevent corrosion. The constants can be bolted on or welded to the support or steel underneath.

Need constants for an upcoming project? Ask for pricing today!

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Custom Pipe Supports and Constants Assemblies For An Oil Refinery In Mexico

October 12th, 2001 No comments
Custom Pipe Support Assemblies For An Oil Refinery In Mexico

Custom Pipe Support Assemblies For An Oil Refinery In Mexico

Custom Pipe Support Assemblies For An Oil Refinery In Mexico

Custom Pipe Support Assemblies

Piping Technology and Products designed and built 24 custom pipe support assemblies to meet the unusual needs of an oil refinery in Mexico. The pipe hanger assemblies each consisted of a 200 E-type constant spring support and a cradle assembly. The constants are designed for loads of 9856 lb. to 13,288 lb., and for total travels ranging from 3.5″ to 5.5″. Operational conditions dictated that the constant springs have settings for emergency and start-up, in additional to the standard settings of cold for shipping, and hot for normal operations.

The cradle assemblies attached to the constants are to support pipes with operational temperatures of 1070°F to 1100°F. Thus while the constants could be made of A-36 steel, the assemblies could not. The pipe saddle itself was made by splitting a section of A387-11 chrome alloy pipe. The other support components were all made of 304 stainless steel. This includes a 1-3/4″ Eye Rod, two 27″ I.D. U-bolts, and two 33″ lengths of 3″ diameter SCH. 80 pipe.

Do you need custom pipe supports for an upcoming project? Get pricing today!

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