Tag: Variables

F-Type Variable Spring Supports Designed for a Petrochemical Plant in Canada

February 27, 2024

F-Type Variable Spring Supports Designed For A Petrochemical Plant In Canada

Type: F-Type Variable Spring Support Assemblies
Size: Heights up to 12-3/4”
Spring Casing Diameters from 6-5/8” to 8-5/8”
Base plates from 9″x 9″ to 13-1/4” x 13-1/4″
Design: Operating Temp.: -49°F to 122°F
Operating Loads from 697 lb. to 6093 lb.
Movements of 0.04″ to 0.2”
Material: Hot-dipped Galvanized Carbon Steel
Testing: Load & Travel Test |  Q.C. Inspection

Piping Technology and Products, Inc. recently designed and manufactured F-Type variable spring supports with internal load columns for a petrochemical plant in Canada. The variables are fabricated from carbon steel that is able to accommodate low temperatures (A516-GR. 70N). The operating temperature ranges from -49°F to 122°F while supporting operating loads from 697 lb. to 6093 lb. and movements of 0.04″ to 0.2″. They are designed to accommodate installed heights up to 12-3/4″, with spring casing diameters from 6-5/8″ to 8-5/8″, along with base plates from 9″x 9″ to 13-1/4″ x 13-1/4″ for installing either by bolting or welding in the field. Load and travel tests, along with visual Q.C. inspections were performed before shipment.

Variable supports are typically used for the following considerations in piping systems:

  • Compensating for Thermal Expansion
  • Maintaining Stress and Load
  • Installation in Piping Systems
  • Maintenance
  • Supporting Heavy Loads

Variable spring cans play a crucial role in maintaining the integrity and stability of piping systems by compensating for thermal expansion or contraction, supporting heavy loads, and allowing for vertical movement. They are essential components in industries such as petrochemical, power generation, semiconductor, refining, paper and pulp processing, and other applications where large-scale piping systems are employed.

Variable spring cans come in a variety of designs and are constructed using different materials to suit specific applications and environmental conditions. Materials commonly used for variable spring cans include carbon steel, stainless steel, and special alloys. The selection of materials is crucial to ensure that the device can withstand the corrosive effects of certain fluids or harsh environmental conditions.

PT&P REF. ORIGINAL POST 05192020

F-Type Variable Spring Supports with Graphite Slide Plates

December 19, 2023

F-Type Variable Spring Supports With Graphite Slide Plates Designed For An Oil Refinery

Type: Variable Spring Supports with Graphite Slide Plates
Materials: CS | HDG | High Heat Aluminum Finish | Graphite
Load Range: 420 lb. to 7650 lb. | 0.65″ Upward Movement
Design: 700°F Temperature | Q.C. & Load Tests

PT&P custom designed an F-type variable spring supports with graphite slide plates for an oil refinery in California. Client inspection O.C. inspections and load tests were conducted prior to shipment.

The graphite slide plates are used to accommodate the axial and lateral movement of the pipeline. Each assembly is equipped with specially designed “round” base plates (instead of the standard square plates) and is designed for temperatures up to 700°F. The spring cans are designed for a load range from 420 lb. to 7,650 lb. and movements up to 0.65″. In this case, they are finished with high-heat aluminum instead of our standard hot-dipped galvanized finish due to the high-temperature requirements in which these units will be operating. We have the unique capability to work with different materials based on the design needs. Variable spring supports, along with our array of engineered support solutions, stand as a fundamental pillar of our business. They enable us to actively collaborate with our clients, whether it involves the products we’ve manufactured, systems subjected to pipe stress and Finite Element Analysis (FEA), or items serviced through the expertise of our field service team.

For many of our products, we have the ability to build and deliver support in less than 24 hours should an emergency arise. It is useful to keep our emergency information handy on your phone and computers should an unforeseen moment arise. Please share this with your maintenance, fixed equipment, and reliability teams. To bookmark or for more information about our emergency assistance, please click here.

PT&P REF. ORIGINAL POST 09242018

A-Type Variable Spring Supports for a Process Power Plant in Oklahoma

August 29, 2023

A-Type Variable Spring Supports For A Process Power Plant In Oklahoma

Type: Variable Spring Supports
Size: Rod Diameter 2” / Casing 8′ long & 3 1/8” Diameter
Material: Carbon Steel
Design: Operating Load 31,563 lbs., Installed Load 29,000 lbs., 0.82″ Downward Movement
Testing: Standard Load & Travel Tests

PT&P designed two standard PTP-4 size 210 A-type variable spring supports for a process power plant in Oklahoma. The springs are fabricated from A36 carbon steel with a hot-dipped galvanized finish. The springs are designed to accommodate a hydro test load of 34,000 lbs. with an operating load of 31,563 lbs. and an installed load of 29,000 lbs., with the movement of 0.82″ downward. Standard load and travel tests were conducted on the variables before shipment. The specially designed springs utilize a rod diameter of 2″ and the spring casing 8′ long and 3 1/8″ in diameter.

In addition to the products we offer, we also have an experienced field service team. Over 80% of the field service we do is for engineered supports, including constant and spring supports. Inspecting pipe supports in high-energy piping systems such as refineries, chemical plants, and power plants is critical for ensuring safety and reliability. Neglecting these inspections can lead to major consequences detailed below:

  • Structural Failures: Over time, pipe supports can weaken due to corrosion, vibration, or other factors. Without inspection, undetected defects can result in the failure of these supports, causing pipes to sag, bend, or even rupture. This can lead to catastrophic accidents and expensive repairs.
  • Leakage: When pipe supports degrade, they may cause pipes to shift or disconnect, leading to leaks at flange connections and other types of connections in high-pressure systems caused by pipe strain. These leaks can release hazardous substances, causing environmental damage, health risks, and operational disruptions.
  • Reduced System Efficiency: Improperly supported pipes can experience increased friction, causing higher energy consumption to maintain the desired flow rates. This inefficiency can result in increased operational costs and decreased overall system performance.
  • Loss of Containment: In high-energy piping systems, failure to inspect supports can compromise containment integrity. A pipe rupture or leak called a “failure in the pressure-containing boundary,” can release hazardous materials, posing serious risks to personnel, nearby communities, and the environment.
  • Regulatory Non-Compliance: Many industries are subject to regulations and standards governing the inspection and maintenance of high-energy piping systems, including ASME B31.1 and 31.3 and API570. The implications of non-compliance can result in legal consequences and fines.
  • Increased Maintenance Costs:With regular inspections, minor issues can be managed so they do not escalate into costly and timely major problems such as extensive repairs or complete system replacement.
  • Loss of Productivity:Unexpected failures and repairs can disrupt production schedules and lead to unplanned downtime, causing financial losses and impacting the company’s reputation.

Correct installation and regular inspections are essential to mitigate risks and ensure industrial facilities’ safe and efficient operation. We have a team of engineers and technicians who are qualified to inspect pipe supports and expansion joints and can assist with diagnosing problems, replacement, and identifying models, types, and sizes. We provide field service to our clients for all product categories we manufacture, even if we are not the OEM because serving our clients is our first priority.

PT&P REF. ORIGINAL POST 11272017

Custom All Stainless Steel Variable Spring Supports for a Floating LNG Platform in Singapore

May 30, 2023

Custom All Stainless Steel Variable Spring Supports For A Floating Lng Platform In Singapore

Type: Variable Spring Supports
Material: Alloy 2205 Duplex/SAE 5160H
Design: Operating Load up to 3,597 lbs./Operating Temperatures of -15-200°F
Testing: Standard Load & Travel Tests

PT&P manufactured these custom variable spring supports for a floating LNG platform in Singapore. The spring housings are fabricated with alloy 2205 duplex, and the coil is manufactured from – SAE 5160H to help prevent corrosion due to sea salt. The variables installed heights range from 10-3/4″ to 12-1/16″ and are designed for an operating load of up to 3,597 lbs. Also, load tests were performed at operating temperatures of -15°F, along with liquid penetrant testing of the welds. These variable springs are also designed to suit a highly corrosive environment such as sea salt. They can operate in temperatures ranging from -14 to 200°F without compromising their load-carrying capacity. We offer a full range of pipe supports and expansion joints for offshore applications, including floating platforms for cryogenic systems for offshore LNG transfer, both for ship-to-ship and ship-to-shore. Our team of engineers and field service technicians have assisted in offshore diving examinations to both inspect and recommend solutions to help solve emergency needs.

As the floating LNG market continues to grow at a rate of almost 5% year over year, it is evident the increased demand for clean energy is the driving factor. Piping Technology and Products and its subsidiaries are well-positioned to support the global pivot to renewable and clean energy needs. In the last year alone, we designed and delivered products and services in most associated sectors, including solar, wind, water, geothermal, bioenergy, nuclear, hydrogen & fuel cell sectors worldwide.

PT&P REF. ORIGINAL POST 01022018

Variable Spring Supports Designed for a Furnace in Trinidad

April 11, 2023

Variable Spring Supports Designed For A Furnace In Trinidad

Type: F-Type Variable Spring Supports (Furnace Springs)
Material: Carbon Steel | Red Oxide Primer
Design: Movement: 1/2 “| Load: 398 lb. | Spring Rate: 84 lb./in.
Testing: Standard Spring Rate & Calibration Tests

PT&P designed and manufactured these F-Type variable spring supports for use in a furnace at a facility in Trinidad. We manufactured these furnace springs for an operating load of 398 lb., a movement up to 1/2″, and a spring rate of 84 lb./in. Customer specifications required a modified “installed height” while maintaining the spring rate, operating load and installation load. In order to accomplish this, PT&P designed, manufactured, and attached, to each spring, a “pedestal” to accomplish the increased installed height. They are fabricated from carbon steel with a red oxide primer coating (instead of a hot dipped galvanized) to protect against corrosion. Our standard hot-dipped galvanizing is not suitable for high temperatures because the zinc used in the galvanizing process can melt and cause damage to surrounding pipes and equipment. We also offer several other coatings for high-temperature applications.

We offer a wide range of modifications to our standard variable springs, from stainless steel units used in Food Processing plants and facilities which operate at Sub-Zero temperatures to units designed for use in high-temperature applications often found in refineries, fertilizer, and chemical plants. Some applications include hydrogen reboilers and radiant coils in gas vent heater systems. Our team of sales, engineering, and manufacturing offers a unique source of experience and knowledge unmatched in our industry.

In a Furnace application, both variable and/or constant spring hangers are utilized to support piping and equipment. In the past year, we have provided constant furnace springs for some of the largest refineries in the Americas. We replaced a 25-year incumbent design with a smaller envelope at a lower cost than any other offering in the market with our newly designed nano-constant. The project requirements were stringent in terms of load deviation requirements of 3% of all catalyst tube springs. We provided over 350 furnace springs in less than six months’ time from our manufacturing facility in Houston, Texas. To expedite the manufacture and shipment of springs, we built a new test machine in order to conduct tests more quickly, as every unit is tested before being shipped to the job site.

If you need assistance or are interested in scheduling a virtual or in-person training specifically on pipe supports and expansion joints for furnace applications, reach out as we are always available 24×7 via our emergency service or just send an email to info@pipingtech.com.

PT&P REF. ORIGINAL POST 02212017

Variable Spring Supports Designed for a Large Refinery Project in Texas

March 28, 2023

Variable Spring Supports Designed For A Large Refinery Project In Texas

PT&P manufactured 266 variable spring supports for a refinery in Texas. The variable spring hangers include chained travel stops for ease of disengagement and reinsertion during plant shutdowns. Variable springs (a type of Compression spring) are used in a wide range of applications (including various Low Carbon Capital projects, CO2 removal units, and Infrastructure improvements) to support the piping system. The variables are fabricated from carbon steel and hot-dipped galvanized to protect against corrosion. The PTP-2 variables were designed for loads up to 13,850 lb. and movements up to 0.1875” upwards. The PTP-4 variables were designed for a maximum load of 15,050 lb. and movements up to 0.8125” upwards. Each spring hanger underwent standard load testing and QC tests. PT&P also provided constant supports for loads that remain uniform throughout the deflection cycle and sway struts for controlling vibration and shock loading while restraining movement due to thermal expansion for this order.

PT&P REF. ORIGINAL POST 04202021

Variable Spring Supports Designed for a Highly Corrosive Environment in Peru

July 1, 2019

 

Variable Spring Supports Designed For A Highly Corrosive Environment In Peru

Type: Variable Spring Supports w/ PTFE Slide Plates
Size: PTP-4 | 9.5″ – 11.5″ Height
Design: 1/8″ Upward & 3/16″ Downward Travel
Material: HDG Carbon Steel | Gloss Aliphatic Polyurethane Topcoat | PTFE, 25% Glass Filled Slide Plates
Testing: Standard Load Testing & Q.C. Inspection

Piping Technology & Products, Inc. recently designed and fabricated F-type variable spring supports for a plant in Peru. The variables are fabricated from carbon steel, hot-dipped galvanized and a gloss aliphatic polyurethane topcoat was applied for corrosion protection. PTFE, 25% glass filled, slide plates are bonded to the top of the load flange to reduce the friction caused by lateral movement. The variables range from 9.5″ to 11.5″ in height and are designed for a travel range of 1/8″ upward to 3/16″ downward. To ensure quality, standard load testing was performed prior to shipping.

Variable Spring Hangers Designed for a Plant in Texas

April 22, 2019

Variable Spring Hangers Designed For A Plant In Texas

Type: B-Type Variable Spring Supports
Size: PTP 100 & 200 | 3′ – 8′ ft. Height
Design: 4,000 lb. – 17,000 lb. Loads
Material: HDG Carbon Steel | Neoprene Coated Springs
Testing: Standard Load Test | Q.C. Tests

Piping Technology and Products, Inc. recently designed and fabricated B-Type variable spring supports for a plant in Texas. The operating loads range from 4,000 lb. to 17,000 lb. The variable springs are fabricated from galvanized carbon steel, have neoprene coated steel spring coils, and are designed to operate in environments up to 750°F. They have an overall height range from 3 ft. to 8 ft″. To ensure quality, standard load tests were performed prior to shipment.

Variable Springs for a Propane Dehydrogenation Unit in Texas

November 5, 2018

Variable Spring Supports For A Propane Dehydrogenation Unit In Texas

Type: Variable Spring Supports
Size: Accommodate Elevation Difference up to 11′-5″
Material: Carbon Steel | Hot-dipped Galvanized
Design: 20,000 lb. Load | 4,700 lb./in. Spring Rate

PT&P designed and manufactured over 50 variable spring supports for a propane dehydrogenation unit in Texas. The spring cans, rods, welded beam attachments, turnbuckles and clevises are fabricated from hot-dipped galvanized carbon steel. The variables can accommodate an elevation difference up to 11’-5” from the bottom of the steel to the connection of the pipe. They were designed for an operating load of 20,000 lb., a spring rate of 4,700 lb./in. and 0.007” upward movement. Standard load testing was conducted prior to shipping.

F-Type Variable Springs for a Refinery in Oklahoma

June 26, 2017

F-Type Variable Spring Cans For A Refinery In Oklahoma

Type: Variable Spring Supports
Size: 70 7/8″ tall and 17 3/4″ wide
Material: Carbon Steel and PTFE Slide Plates
Design: 30,980 lb. load/2,083 lb. spring rate
Testing: 35,000 lb hydrotest

PT&P manufactured variable spring supports for a refinery in Oklahoma. These F-Type PTP-6 spring cans are 70 7/8″ tall and 17 3/4″ wide. They are completely fabricated from carbon steel with PTFE slide plates welded on the load flange and internal guide. They are designed for an operating load of 30,980 lb. .with a spring rate of 2,083 lb./in. and 0.49″ of movement. These variables were hydrotested with a load of 35,000 lb. prior to shipment.

PT&P Variable Spring Supports

January 10, 2017

Learn more about the variable springs constructed at Piping Tech.

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Learn more about the various types of variable spring supports made at Piping Tech, ranging from F-Type, G-Type, springs for furnace applications and much more.

Variable Spring Hangers Designed for an Ammonia Plant

January 9, 2017

Variable Spring Hangers Designed For An Ammonia Plant

Type: B-Type Variable Spring Hanger
Size: PTP-2 Standard Variable Spring
Material: Hot-dipped Galvanized Carbon Steel
Design: 0.955″ Downward Movement | Cold Load: 12,183 lb. | Hot Load: 14,723 lb.
Testing: Hydro-load Test: 15,750 lb.

PT&P designed and fabricated variable spring hangers for an Ammonia Plant in Louisiana. This B-Type PTP-2 variable hanger is fabricated from carbon steel and hot-dipped galvanized to protect against corrosion. The variable is designed for 0.955″ of downward movement and an installed load of 12,183 and an operating load of 14,723 lb. This variable included a 1″ forged steel clevis and the assembly was tested at a hydro-load of 15,750 lb.

Variable Spring Supports Designed for a Furnace Application in Oklahoma

September 26, 2016

Variable Spring Supports Designed For A Furnace Application In Oklahoma

Type: Variable Spring Supports
Design: 1,765 lb. Load | +/- 5% Spring Rate
Material: Carbon Steel with Red Oxide Primer
Testing: Standard Spring Rate & Calibration Tests

PT&P custom designed variable spring supports for a furnace application at a Nitrogen Facility in Oklahoma. The furnace springs are fabricated from carbon steel and painted with a red-oxide primer to help prevent corrosion. The spring supports are designed to support loads up to 1,765 lb. With a spring rate calibrated to be within +/- 5% of the theoretical value.

Variable Spring Supports Product Video

August 10, 2016

Big Ton Spring Supports Designed for Propane Dehydrogenation Facility

June 27, 2016

Big Ton Spring Supports Designed For Propane De-Hydrogenation Facility

PT&P custom designed big ton spring supports for a propane dehydrogenation facility in Texas. The components within these assemblies include the spring housing, load columns, travel stops, spring coils and lifting lugs. While both assemblies measure 42” x 24” x 26-1/2”, they were each modified based on independent specifications for operating loads and movement. The first will accommodate a load of 94,261 lb. and 0.085” of movement, while the second will accommodate a load of 102,219 lb. with 0.08” of movement.

This type of support is ideal for applications, such as pressure vessels, that combine very heavy loads with thermal expansion because of the stability they provide. The big tons were tested in the load cell to insure proper operation throughout the entire working range of the coils.

300 Variable Spring Supports Designed for a Furnace Application

April 25, 2016

300 Variable Spring Supports Designed For A Furnace Application At A Methanol Processing Facility

PT&P designed and fabricated 300 variable spring supports for use in a furnace within a methanol processing facility in Mexico. We manufactured the ”housing” of these variable springs using seamless pipe (in order to prevent the springs’ coils from rubbing against the ”weld seam” of a standard pipe) so that the exact spring rate (+/- 5%) can be calculated without discrepancies or variations. The reason that an accurate spring rate is important is because furnace springs function as a ”scale” in order to determine the weight of the radiant coils within the unit. These springs are coated with red oxide primer to protect against corrosion. We manufactured these furnace spring assemblies for an operating load of 1,036 lb. and a movement up to 8 1/2″. Each spring is traceable to test data and tagged with its’ unique spring rate along with other standard information use for identification.

Custom Variable Spring Supports Designed for a Furnace Application in an Ammonia Plant

October 19, 2015

Custom Variable Spring Supports Designed For A Furnace Application In An Ammonia Plant

Custom Variable Spring Supports Designed for a Furnace Application in an Ammonia Plant.

PT&P custom designed variable spring supports and hangers for a furnace application in an ammonia plant. The furnace springs are fabricated from carbon steel and painted with a red-oxide primer to help prevent corrosion. The spring supports are designed to support loads ranging from 400 lb. to 12,500 lb. Over 150 spring coils underwent calibration test prior to fabrication and insertion into the variable support housing to ensure variance of less than 5%.

F-Type Variable Spring Supports Designed for a Chemical Processing Plant

May 23, 2015

F-Type Variable Spring Supports Designed For A Chemical Processing

PT&P manufactured F-type variable spring supports for a chemical processing plant in Texas. The variables are designed with an internal guide and for a movement of 0.09″. They are designed for a 5,350 lb. cold load and 5,450 lb. hot load. Because these springs had to be capable of withstanding a hydro-test in excess of 33,000 lb. (which substantially exceeded the standard maximum hydro-test of 18,000 lb.), special collars were used in conjunction with the standard travel stops. These collars are designed to absorb the large hydro load by relying on the high strength characteristics of the load flange and housing components of the assembly while essentially bypassing the threaded internal components.

G-Type Variable Spring Supports Designed for a Coker Replacement Project

April 12, 2015

G-Type Variable Spring Supports Designed For A Coker Replacement Project

PT&P fabricated PTP-6 G-type variable spring supports for a coker replacement project in Kansas. The variables are comprised of two standard spring housing joined together with an intermediate bridge assembly. The bridge assembly is customized to match existing site conditions which allows for use in applications with limited space or interferences. They are 50″ in length, designed for an operating load of 15,000 lb. and fabricated from carbon steel with a hot-dipped galvanized finish. All variable assemblies underwent standard load and spring testing prior to shipment.

F-Type Variable Spring Supports Designed with Stainless Steel Slide Plates and Permanent Travel Stops

November 8, 2014

F-Type Variable Spring Supports Designed With Stainless Steel Slide Plates And Permanent Travel Stops

PT&P custom designed F-type variable spring supports for an oil refinery in Saudi Arabia. These assemblies range in height from 14-1/4″ to 39-3/8″ and include stainless steel slide plates and upper permanent travel stops. Some of the variables include an additional pipe extension to meet the installation height requirement. The variables are fabricated from carbon steel and painted with a special paint to resist corrosion. All variable assemblies underwent a standard variable spring test prior to shipment.

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