The Pipe Support Blog

Variable Springs with Permanent Adjustment Travel Stops

Piping Technology & Products designed and manufactured these variable springs with permanent adjustment travel stops for a refinery in Texas.

These types of travel stops are used to allow ease of installation, provide a means for field load adjustment within the working range of the spring, and allow the springs to be "locked" easily whenever they are taken out of service for shutdowns or refurbishment of the system.

For this requisition, a total of 23 variable springs with adjustable travel stops were fabricated.  The springs are made from carbon steel and the adjustment rods are made from A-325 high strength bolt material.  The springs ranged in size from PTP-1-60-F to PTP-2-180-F size spring.  The largest springs were set for an operating load of 12,900 lbs. and a hydrotest load of 14,000 lbs. and a maximum travel of ½.  All of the springs were tested in the load cell to insure proper operation. Per the customer's request, these springs were supplied at an expedited delivery of 3 weeks.

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

58,000 lb. Load Variable Spring Assemblies

Piping Technology & Products, Inc. designed and manufactured two custom built variable spring assemblies using heavy duty spring coils and fabricated hardware components. The loads, as specified by the customer, were greater than the maximum operating loads for our largest (PT&P size 220) standard variable springs. In order to meet the customer's requirements, a custom variable spring was designed and fabricated using a larger spring coil normally used only in constant spring assemblies. The specially fabricated variable spring was 20 in diameter with a standing height of 51 and the hanging components (rod, turnbuckle, clevis) were 3 1/2 diameter pieces.  The spring rate was 3232 lb./in.  All the pipe hanger assembly components were made from carbon steel. The installed (cold) load was 58,000 lbs. and the operating (hot) load was 61,700 lbs. The calculated movement from cold to hot was 1 1/8 down. The variable spring was tested in the load cell to insure proper operation and also to set the cold load to the specifications provided by the customer.

Do you see a need for variable springs in your piping system? Get pricing today!

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!

116,500 lbs. Load Big Ton Springs for a Petrochemical Plant

Piping Technology & Products, Inc. designed and manufactured 4 identical Big Ton springs for a petrochemical plant in Texas.

These 66 x 18 x 14.5 Big Ton springs are made of A-36 carbon steel and have a design suitable for temperatures up to 750 degrees F. They have a hot load capacity of 116,500 lbs and a cold load capacity of 94,500 lbs. Load tests were performed to ensure that the springs could safely sustain the specified design load. Applicable travel was ½ downward, but design travel ranges up to 6.

Want to learn more about big ton spring supports? View an engineered spring support webinar today!

Variable Spring Supports for a Refinery in Texas

Piping Technology & Products, Inc. designed and manufactured variable spring supports for a refinery in Forney, Texas.

The spring supports are made of carbon steel and have a length by casing diameter range from 9-3/16 by 8-5/8 to 53-11/16 by 12 ¾.  In order to insure the quality of the springs, compression tests were used with a load capacity of 21,500 pounds.

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Piping Technology & Products, Inc. specially designed and fabricated big ton springs equipped with special rollers to accommodate moving apparatuses and support piping at a refinery in India.

The specially designed big tons were made to support loads ranging from 55,000 lbs. to 114,000 lbs with no more than 5/16" upward movement. Its composition comprises of A-36 carbon steel, built to a maximum height of 23-5/8".

The special rollers installed on the top (see photo at top right) of the load flange, keeps the aforementioned loads moving smoothly under all kinds of conditions. To further assure their quality, each of the big ton spring assemblies underwent load testing and afterward were hot dipped galvanized to prevent against corrosion.

Want to learn more about big tons? Visit our webinar archives today!

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!

Big Ton Springs Equipped with Lifting Lugs

Piping Technology & Products, Inc. specially designed and fabricated big ton springs equipped with side lifting lugs to support piping of a 102-megawatt, refinery cogeneration power plant in California.

Under typical circumstances, this type of job application would utilize variable spring hangers, but because of the restricted space, the hangers' size would be too small to support a hot load of 19,068 lbs and cold load of 17,212 lbs. In order to satisfy both the required loads and space, PT&P engineers designed and fabricated figure 500 big ton springs equipped with side lifting lugs. The lifting lugs were attached to allow the big ton to suspend as a variable spring would in the field.

 

Are big ton springs a necessity for your next project! Request a quote today!

Variable Springs to Meet Travels Needed to Support Furnace Tubes of a Hydrogen Reformer

Piping Technology & Products, Inc.  specially designed and fabricated hundreds of altered Type A variable spring hangers in order to accommodate the special travel and spring rate needed to support the furnace tubes of a hydrogen reformer in Venezuela. In order to accommodate customer specified travel and spring rate, modified spring coils were required. With a travel of 8 7/8, the variable spring hanger casing lengths were increased from the standard size of 32 inches to over 6 feet long. The calculated spring rate is 79 lb/sq in for an operating load of 2,804 lbs. and installed load of 3,505 lbs. The housings are coated with a heat resistant paint, which protects the spring coils from corrosion and high temperatures of the furnace area.

Want to learn more about variable springs? Visit our webinar archives today!

PT&P Custom Designs and Fabricates Big Ton Springs Equipped with Lifting Lugs



Piping Technology & Products, Inc. specially designed and fabricated big ton springs equipped with side lifting lugs to support piping of a 102-megawatt, refinery co-generation power plant in California.

Under typical circumstances, this type of job application would utilize variable spring hangers, but because of the restricted space, the hangers’ size would be too small to support a hot load of 19,068 lbs and cold load of 17,212 lbs.  In order to satisfy both the required loads and space, PT&P engineers designed and fabricated figure 500 big ton springs equipped with side lifting lugs. The lifting lugs were attached to allow the big ton to suspend as a variable spring would in the field.

The big ton springs are comprised of A-36 carbon steel and built at 13"x 23"x 9-1/2" with a downward travel of .232". The job was completed within two days to meet the customer’s quick turn requirements.

Introducing PT&P's Maintenance Free Slide Plates, Bronzphite®
Piping Technology and Products is a supplier of maintenance free slide bearing plates, Bronzphite®, whose high strength bearings and impregnated graphite, together create a concoction ideal for maintaining excellent wear resistance and durability under severe operating conditions. PT&P has supplied Bronzphite® for a number of companies in the oil, gas and power industry.