70,000 lb. Load Vertical C-Type Constants

December 13, 2002

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.

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

November 8, 2002
116,500 Lbs. Load Big Ton Springs For A Petrochemical Plant
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.

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Variable Spring Supports for a Refinery in Texas

September 27, 2002
Variable Spring Supports For A Refinery In Texas
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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Big Ton Springs Equipped with Special Rollers

August 23, 2002
Big Ton Springs Equipped With Special Rollers
Big Ton Springs Equipped with Special Rollers
Big Ton Springs Equipped With Special Rollers
Rollers Installed On top of the Load Flanges

Piping Technology & Products, Inc. specially designed and fabricated big ton springs equipped with special rollers to accommodate moving apparatus 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 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.

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Vertical F-Type Constants for Power Plant

July 19, 2002
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.

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Big Ton Springs Equipped with Lifting Lugs

July 12, 2002
Big Ton Springs Equipped With Lifting Lugs
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.

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

July 5, 2002
Variable Springs To Meet Travels Needed To Support Furnace Tubes Of A Hydrogen Reformer
Variable Springs to Meet Travels Needed to Support Furnace Tubes of a Hydrogen Reformer
Variable Springs To Meet Travels Needed To Support Furnace Tubes Of A Hydrogen Reformer
Custom Variables in the Field

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.

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July 2002 News

July 4, 2002

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

Big Ton Springs
Big Ton Springs

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, Bronzphites®

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.

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Constants For Constricted Areas of a Chemical Processing Plant

May 31, 2002
Constants For Constricted Areas Of A Chemical Processing Plant
Constants For Constricted Areas of a Chemical Processing Plant

Piping Technology & Products, Inc. custom designed and fabricated 200-C type constants to suit constricted areas of a chemical processing plant in Texas.

Short distances between the pipe and the supporting beam necessitated a custom design. Two designs were needed one was for a 230 lb. load with 11″down travel, while the other was for a 260 lb. load with 13-1/2″ down travel. The PT&P standard design for these constants has Take-Out values of 19-9/16″ and 21-9/16″, respectively. However, the available space permitted no more than 9-1/2″.

Compare the final design, shown on the left to the standard design, shown on the right. Note that the lower part of the frame has been cut away, permitting the pipe to move nearer to the constants’ supporting lugs.

PT&P’s system of stock pipe and spring supports, allowed engineers and workers to fabricate these constants within a short amount of time.

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C-Type Constants

May 3, 2002
 C-Type Constants
C-Type Constants

Piping Technology & Products, Inc. designed and manufactured 70 horizontal, C-type constants for a furnace application located in Venezuela.

 C-Type Constants
C-Type Constants

The sizes of the Figure 200 constants ranged from 32 to 64, with a total travel of 4.5 to 10.5, and loads varying from 1,149 to 5,149 pounds. The constants are provided with a custom designed PT&P Figure 270, which consists of a double lug horizontal traveler versus a single lug. Within the horizontal travel, the constants are designed to handle 8 of horizontal movement and support a rod that remains vertical throughout pipe movement.

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