The Pipe Support Blog

200 U-Type Constants with 46" of Travel

Inspecting the Constant Spring Supports

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!

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!

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!

Hydraulic Snubbers for a Construction Site

Piping Technology & Products recently designed and manufactured three hydraulic snubbers for a construction site in Louisiana.

These snubbers, with an operating load of 3500 lbs., are 2.5 x 6 and allow for 4 of total travel distance. The lock-up velocity test was performed on these snubbers to make sure that at high rates of loading, especially impact, the snubber would provide very high resistance to movement. And, the drag test was performed to make sure that at low speeds they provide very low resistance to movement.

 

Do you see a need for hydraulic snubbers in your plant? Let us price them for you today!

Hold Down Pipe Clamps for an Engineering and Construction Company

Piping Technology & Products manufactured 2" hold down pipe clamps (figure HD-1) for an engineering and construction company.

The figure HD-1 is PT&P's anchor type hold down and is usually used on pipe lines where little or no insulation is required. These hold down clamps were constructed of SA36 carbon steel for temperatures to 750ºF.

Need hold down clamps? We're happy to serve your needs!

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.

20" Stainless Steel Suction Strainer

Sweco Fab, the ASME fabrication shop of Piping Technology & Products, Inc., specially designed and manufactured two 20" OD x 36" long, suction strainers for a chemical plant in Louisiana.

The strainers, which were fabricated from SS32, each weigh 1,300 pounds. They were designed at 300 psig and 600° F and built to ASME code. In order to insure quality of the welds, PT&P's Q.C. inspectors 100% x-ray tested butt welds of longitudinal seams and circumference seams, head to shell. Other pressure containment welds were dye penetrant examined. The unit, as a whole, was hydrotested at 390 PSIG.

Learn more about other Sweco Fab Inc. products in our webinar archives.

1,000 Standard Pipe Supports for Corrosive Environment

Piping Technology & Products, Inc., designed and fabricated over 1,000 standard pipe supports for a chemical agent disposal facility. These supports are to be used in a corrosive environment, therefore a unique, off white coating known as chemical resistant epoxy was used to cover the carbon steel, structural members.

The hardware was hot dipped galvanized, but in some cases, the u-bolts were coated with neoprene. Frames, guides, cantilever and axial stop supports comprised of the bulk of the material, however other support assembly components included rod hangers, clamped shoes and riser clamps.

Need pipe supports for your company? Get a pricing today!

66" Diameter, Three-bolt Pipe Clamp

66" Diameter, Three-bolt Pipe Clamp

Piping Technology & Products, Inc. custom designed and fabricated a 66-inch diameter, three-bolt pipe clamp for a chemical company located in Deer Park, Texas.

The clamp will be used in conjunction with a PT&P Spring Hanger and a length of rod in order to support the pipeline.  After formation, the clamp's dimensions measured at 97.75 OAL and 69.5 at its widest point. By using a FEA program, the clamp was designed for an operating load of 24,000 pounds at 500° F. The materials used consisted of 1 ¾ x 10 x 128 ¼ thick A-36 Carbon steel, with three 2½ studs and nuts.

In need of some three-bolt pipe clamps? Request for pricing today!

1,728 Rods & Clevises

Piping Technology & Products, Inc. custom designed and fabricated 1,728 rods and clevises for a heat recovery steam generation plant. The rods and clevises will be utilized to support various pipe loads throughout the piping system.

Learn more about rods and clevises by visiting our webinar archives!