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Engineered Spring Supports — The Pipe Supports Blog

Variable Spring Supports with Permanent Upward Travel Stops

October 2nd, 2012 Comments off

Five total assemblies of custom designed variable spring supports were made for an oil refinery in the United Arab Emirates. These springs required a permanent upward travel stop. The spring cans were supplied with PTFE and polished stainless steel slide plates attached to carbon steel load flange. All materials used were domestic (from the U.S.). The springs were tested for lateral loads. The spring coils were stress tested and can withstand temperatures of 176°F (80°C), with a downward movement of 30mm – 45mm.

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Big Tons with W-Beams as Stilts

September 17th, 2012 Comments off

Stilts using W-Beams were added to these big ton variable assemblies in order to meet height requirements for an oil refinery in Port Arthur, TX. Entirely fabricated with carbon steel, these big tons measure 50 1/2″ – 70″ L x 18″ – 22″ W by 37″ H and are capable of supporting loads up to 113,734 lb with an upward travel range of .076″ – .816″. Permanent travel stops were later installed in order to prevent any chances of downward shift.

113 F-Type Variable Spring Cans with PTFE Slide Plates

July 16th, 2012 Comments off

113 F-Type Variable Spring Cans with PTFE Slide PlatesThese F-Type variable spring cans were designed with PTFE, 25% glass filled slide plates for a local oil refinery. Slide plates are used to reduce the friction between the load flange of the spring and the pipe support. This allows for easier adjustment of the spring’s installed height. These variables include external travel stops. The external travel stops are sometimes referred to as universal travel stops and can be utilized to adjust the installed load (also called the cold load) to other installed loads within the working range of the spring. 113 variable springs were supplied for this job. The variables have an installed load ranging from 95 lb. to 11,000 lb. and an operating load ranging from 90 lb. to 10,703 lb. They are part of a plant expansion and will be used to support horizontal piping in an oil refinery.

 

113 F-Type Variable Spring Cans with PTFE Slide Plates

Big Ton Variable Spring Supports with Rollers Designed to Support a Load up to 60,000 lb.

July 2nd, 2012 Comments off

Big Ton Variable Spring Supports with Rollers Designed to Support a Load up to 60,000 lb.

These are custom designed big ton variable spring assemblies manufactured for a chemical plant in Brazil. They are fabricated from A-36 carbon steel, with monel rods, nuts and hardware. They measure 18″ L x 26″ H x 26-1/2″ W and are capable of supporting loads up to 60,000 lb. with down travel of .52″. These big tons employ the use of rollers for adequate mobility and are painted to protect against corrosion.

Special E-Type Constant Springs Designed to Support Boiler Trim Piping

June 4th, 2012 Comments off

Custom PTP-100 E-Type Constant Spring Supports

Special PTP-100 E-Type constant spring supports were custom designed to support boiler trim piping for steam generating in an upper thermal power unit. The constants measure 5-3/8″ W x 16-3/4″ L x 23-1/2″ H. They are highly customized to meet the customer’s space requirements and operating method to eliminate the hanger rod from shifting, allowing it to move only vertically while going from cold to hot position. Standard constant assemblies of this size, are about 50% larger and the hanger rod would shift horizontally as the travel reaches the hot position. These constants are designed for loads ranging from 72 lb. to 92 lb. and movements ranging from 10″ to 11-1/2″ downward. Standard load and travel tests were conducted prior to shipment

Solution for Removing Travel Stops in Variable Cans with Heavy Loads

May 22nd, 2012 Comments off

For spring cans capable of 40,000 lb. or greater, we recommend you use jacking bolts to remove the travel stops. Visit our visual media section to learn the Solution for Removing Travel Stops at Heavy Loads.

232 Variable Spring Supports for a Natural Gas Processing and Separation Plant

May 14th, 2012 Comments off

232 Variable Spring Supports for a Natural Gas Processing and Separation Plant

A total of 232 variable spring supports were custom designed for a natural gas processing and separation plant. This project included various spring sizes from PTP-1 30 C-type to PTP-4 160 F-type assemblies. The variables are fabricated from carbon steel, galvanized and coated with a special 3-coat paint system to protect against corrosive byproducts such as sulphur. The F-types include 304 stainless steel and PTFE, 25% glass filled slide plate assemblies.

232 Variable Spring Supports for a Natural Gas Processing and Separation Plant

251 Variable Furnace Springs for a Chemical Plant in Virginia

April 2nd, 2012 Comments off

Variable Furnace Springs

Close-up of Furnace Variable Spring251 variable furnace springs were designed and fabricated for fertilizer production at a chemical plant in Virginia. The furnace cans are carbon steel and painted with red-oxide primer to avoid any potential hazards where exposed to high temperatures. This project included figures: PTP-1-120, PTP-2-150, PTP-2-180, PTP-4-100 and PTP-4-200 variable furnace springs with operating loads ranging from 1,042 lb. to 15,512 lb. A load test on all variable springs was conducted prior to shipment.

600,000 lb. Load Mega Ton Spring Support with Bronzphite® Slide Plates

March 7th, 2012 Comments off

600,000 lb. Load Mega Ton Spring Support with Bronzphite® Slide Plates

A total of eight big ton spring supports, “mega tons” were designed and manufactured to support two reactors in a power plant weighing approximately three million pounds each. The mega ton pictured incorporated eighteen individual spring coils to produce a load capacity of approximately 602,000 lb. and a spring rate of 112,500 lb./in. It was designed with eight Bronzphite® slide plates that measured 12″ x 12″. The 12″ x 12″ slide plate selection was based upon the ability to position individual squares across the load flange surface while simultaneously providing the total slide plate surface area required to support the operating loads.

By using individual slide plate squares, the fabrication and assembly time was reduced because a standardized mounting procedure could be incorporated and repeated as necessary for each big-ton load flange subassembly. Overall, the slide plates were incorporated into the design to reduce the horizontal forces which would be imparted onto the big-ton spring’s load flange during lateral deflection (movement) of the reactor.

600,000 lb. Load Mega Ton Spring Support with Bronzphite® Slide Plates

Bronzphite® slide plates, in particular, were selected because these big-tons will be used in a location which will see continuous “cold-to-hot” operating cycles and as a result, the robust nature of Bronzphite® proved more advantageous than other types of slide plates. The other two designs used nine slide plates, one with fifteen individual coils to produce a operating load of 594,000 lb. and a spring rate of 250,050 lb./in. The other design had an operating load of 300,000 lb. and a spring rate of 106,000 lb./in.

Variable Springs with Guided Load Columns and PTFE Lined Pipe Saddles

March 2nd, 2012 Comments off

Variable Springs with Guided Load Columns and a PTFE Lined Pipe Saddles

These F-type variable spring supports are fabricated from carbon steel with a hot dipped galvanized finish and designed with guided load columns to provide stability for minimum lateral movement. The fig. 46 pipe saddles are also fabricated from carbon steel with a HDG finish and lined with PTFE, 25% glass filled material. The pipe saddles are designed for 8″ to 36″ diameter pipe sizes, and the entire assembly is 50″ in height. These variable-saddle support assemblies are capable of supporting up to 22,300 lb. and 1″ vertical movements. We performed standard spring loading tests and a Q.C. inspection prior to shipping to an offshore oil and gas platform near Malaysia.

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