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.

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.

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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

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

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

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!

Horizontal Upthrust Constants for a Power Plant

Multiple Constants During Inspection

The horizontal upthrust constants (Fig. PTP200-U) were fabricated from carbon steel and chrome-moly for a Heat Recovery Steam Generator. The constants range in sizes PTP-200 size 3 to 65 and weigh from 24 lbs to 1,300 lbs. They support loads of 100 lbs to 8,100 lbs. The constants support pipes and equipment subjected to vertical movement due to thermal expansion at locations where transfer of stress to other supports or equipment can be critical. Horizontal upthrust constants are utilized in areas where horizontal travel is unacceptable. Standard testing was completed for performance and quality assurance.

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Upthrust 200-U Type Constants for an Oil Refinery

Upthrust 200-U Type Constants for an Oil Refinery

The upthrust constants (PTP Fig. 200-U) were fabricated from A36 carbon steel. Weighing at 4,150 lbs each, they measure 94” long, 27” wide, and 43” tall. They support loads from 90,700 lbs to 93,000 lbs with 4” of vertical travel. In addition, they are custom designed with extra supporting points for heavier loads. They are used to support the piping system from beneath the pipeline. Upthrust constants only allow for vertical travel and are used where horizontal travel is unacceptable. Standard load and travel testing was completed to assure quality and performance.

Do you require u-type constants in your plant or refinery? Let us price them for you now!

Upthrust U-Type Constants for Plant in Mexico

Upthrust U-Type Constants for Plant in Mexico

The constants‘ dimensions are 25” x 56” with 17” pipe OD, and 29” x 68” with 21” pipe OD. These constants have a loaded capacity of 8,400 to 17,800 lbs. This constant is designed to support piping from below. The tests that were conducted on this product were standard loading and travel testing to ensure quality and performance. The constant is manufactured from A36 carbon steel.

Do you require constant spring supports in your piping system? Get pricing now!

Horizontal U-Type Constants for Power Plant

Finished Products Ready for Shipment

The constants measure 61 x 17 x 40 and weighs 560 lbs. a piece. They are designed to operate in temperatures from -40° F to 660° F. The unique construction of the constants permits extensive vertical travel, ranging from 20.5 to 26. Standard load and adjustment testing was performed to ensure quality prior to shipping.

Do you require u-type constants in your piping system? Let us price them for you!

Constants for an Oil Refinery in Texas

PTP-100 Type B

Piping Technology & Products, Inc. recently fabricated 48 PTP-200 type U and 54 PTP-100 type B constants for an oil refinery in Texas.  The PTP 200 type U with base support constants are designed for operating loads ranging from 650 lbs. to 7700 lbs. and a travel range of 3″ to 4″. They are fabricated out of A36 carbon steel with dimensions ranging from 15″x22″ to 27″x38″. The PTP 100 type B constants are fabricated from A36 carbon steel with dimensions ranging from 11.5″x23″ to 12″x29″ and total travel of 3″ to 4″. These constants are designed for operation loads ranging from 1100 lbs. to 2800 lbs.  Space restrictions required a customized compact design. Standard load testing was performed to ensure product quality prior to shipping.

Do you require constant supports for your piping system? Let us price them for you today!

44,000 lb. load Horizontal Upthrust Constant

Piping Technology & Products, Inc. recently fabricated horizontal upthrust constants for loads ranging from 24,000 lb. to 44,000 lb.  These Fig. PTP 200 type U constants are designed for a travel range of 4″ to 4 ½”. They are fabricated from A36 carbon steel with dimensions ranging from 60″x52″ to 80″x52″. To meet customer specified installation heights, angles were added to the base of each constant. Load testing was performed to ensure product quality prior to shipping.

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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!

200 U-Type Constants with 46" of Travel

200 U-Type Constants with 46" of Travel

Piping Technology & Products, Inc. recently designed and manufactured 200 U-Type upthrust constants for a geothermal plant in Hawaii. The constant pictured on the left has frame dimensions of W 40″ x H 75″ x L 142″, a constant load of 9,888 lb. to 10,239 lb. and a design travel of 46″. It also utilizes rollers and PTFE, 25% glass filled slide plates to reduce the friction resulting from axial movements. All the constants in this project are composed of A36 carbon steel. Standard load testing and travel testing were conducted prior to shippment.

Do you require custom constants like those described above? Let us price them for you today!