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Variable Spring Pipe Supports for Movement and Load Control
April 28, 2025

Ptp-1 F-Type Variable Spring Assemblies

When pipelines expand and contract due to heat, support systems must adapt to protect capital-intensive, critical path, long-lead-time fixed equipment essential to plant operations and output. That’s where the need for variable spring pipe supports comes in to maintain the integrity of the piping systems.

These supports are designed to carry the vertical weight of the pipe while allowing for thermal movement. As temperatures change and loads change, the pipe shifts. A variable spring reacts with a moment  with the compression of the spring, supporting that movement and keeping your system in balance. They help control how much and in which direction your piping moves, protecting your equipment and keeping operations safe.

Built to Perform: Custom Variable Spring Pipe Supports

At Piping Technology & Products, we recently designed and built a set of variable spring supports used in a large-scale industrial project. These supports were customized to meet the exact project specs and defined operating envelope. Each variable spring was built to:

  • Support loads up to 6,500 lbs 
  • Allow up to 3 inches of movement (tighter tolerances can be achieved if required)
  • Include travel stops to lock movement during shipment and installation
  • Withstand corrosion with hot-dipped galvanized carbon steel housing and bolted design
  • Supplied with a pedestal to achieve a custom-installed height

Every variable spring support made by PTP is load-tested by our quality teams in our facility in Houston for quality and delivered with clear tags and instructions to simplify the installation process.  We have a full-service field service team that can offer oversight during installation if desired.

Made for the Chemical Processing Industry

This project was part of a chemical processing facility—an environment where heat, pressure, and movement are constantly in flux. In these operating conditions with sometimes caustic media, proper pipe support isn’t optional. It’s critical for both safety and uptime. Our spring supports help protect piping, prevent misalignment, and reduce the risk of stress on connected equipment.

More Pipe Support Solutions from PT&P

In addition to variable spring supports, we also provide other engineered solutions used widely in chemical processing plants:

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Precision-Engineered Cryogenic Pipe Supports
April 21, 2025

72&Quot; Dia. Cryogenic Pipe Supports Designed For An Lng Facility

Precision-Engineered Cryogenic Pipe Supports

When dealing with cryogenic piping systems, thermal isolation is more than a preference, it’s a necessity. 

That’s where cold shoes come in. Cold shoes are specialized pre-insulated pipe supports designed to prevent the transfer of extreme cold from the pipe to surrounding structures. 

These supports are critical in preserving structural integrity and ensuring safe operation in cryogenic environments, withstanding temperatures as low as -300°F.

At Piping Technology & Products, we manufacture cold shoes with high-density polyurethane foam (PUF) insulation. Known for its superior thermal resistance, low weight, and adaptability, PUF is ideal for minimizing heat transfer while maintaining structural support.

Built for Extreme Conditions — and Big Pipelines

In a project for a Liquefied Natural Gas (LNG) facility in Mozambique, we fabricated a series of custom-designed cryogenic pipe supports engineered for performance in high-demand applications.

Key Product Specs:

  • Pipe Diameters: 30″ to 72″
  • Support Dimensions: 45″ to 88″ high, 42-1/2″ to 85-1/2″ wide, 28″ to 33″ long
  • Insulation: 5″ to 6″ thick high-density polyurethane foam
  • Materials: Carbon steel with hot-dip galvanized finish; aluminized steel jacket for vapor barrier

Polyurethane foam insulation (PUF) was selected for its reliability under thermal stress and ability to be customized to various pipe sizes. 

Our in-house engineering and fabrication capabilities allow us to deliver high-performance supports that meet exact project specifications while minimizing installation and maintenance issues.

Designed for the LNG Industry

LNG facilities demand exceptional durability, reliable thermal performance, and insulation systems that prevent heat ingress into cryogenic pipelines. Without proper cryogenic pipe supports like cold shoes, LNG systems face a range of serious challenges:

  • Boil-Off Gas (BOG): Heat ingress can cause LNG to vaporize, leading to pressure buildup and product loss.
  • Frost and Ice Formation: External surfaces can ice over, causing structural stress and safety hazards for workers.
  • Material Embrittlement: Non-cryogenic components may crack or fail when exposed to ultra-low temperatures.
  • Increased Energy Use: Systems become less efficient, requiring more power to maintain cryogenic conditions.
  • Environmental and Safety Risks: Uninsulated lines can leak LNG vapor, potentially forming flammable gas clouds.

These issues drive up costs, introduce safety concerns, and reduce system reliability.

From small-bore lines to massive pipe systems like those in this project, our cold shoes are engineered to prevent these outcomes at LNG operating plants.

With high-density PUF insulation and heavy-duty construction, they support large-diameter lines while minimizing thermal transfer, resisting corrosion, and protecting the integrity of LNG infrastructure.

Beyond Cold Shoes: Full-Scope Support for LNG Projects

Piping Technology & Products is more than a manufacturer—we’re a project partner. In addition to cold shoes, we offer a comprehensive suite of products commonly used in LNG and other cryogenic applications:

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Trapeze Roller Hangers for a Food Processing Facility
December 3, 2024

Trapeze Roller Hangers For A Food Processing Facility

Type: Trapeze Roller Hangers
Size: 2-5/8″ to 16-3/8″ L x 4″ to 16″ Dia. | 600 to 3,970 lb. Load
Material: Cast Iron
Testing: Standard quality control inspections

Piping Technology & Products designed these trapeze roller hangers for a food processing facility in Kentucky. Rollers are typically employed when axial movement at the support location results in swing angles exceeding 4 degrees.

The rollers are available in lengths ranging from 2-5/8″ to 16-3/8″ for pipe diameters between 4″ and 16″. Constructed with cast iron rolls and sockets along with steel roll rods, they ensure durability and adaptability for a range of applications.

The rollers are oriented horizontally for the suspension of pipes using two all threaded vertical rods and hex nuts for vertical adjustments, effectively accommodating longitudinal movement caused by thermal expansion or contraction. They are designed for load ratings ranging from 600 to 3,970 lbs.

Standard quality control inspections were conducted prior to shipment to ensure compliance with industry standards. Similar applications by Piping Technology & Products include:

  • Wastewater facilities
  • Food Service
  • Bridges
  • Cooling Towers
  • Refineries
  • Gas Plants

In addition to standard rollers, we offer machinable rollers made from specialized non-metallic materials, such as polyurethane and polyurethane foam. These materials can be custom-contoured to meet unique project specifications using our in-house manufacturing capabilities.

For larger roller assemblies, Piping Technology & Products provides complete customization options, including finite element analysis (FEA) to ensure the design meets the exact requirements of your piping system. Whether you need standard or customized solutions, our team is equipped to deliver quality products tailored to your application.

PT&P REF. ORIGINAL POST 04242017

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Custom Designed Upthrust Constant Spring Supports
November 19, 2024

Custom Designed Upthrust Constant Spring Supports

PT&P designed Fig. PTP 200-U upthrust constant spring supports modified to accommodate an increased installed height. PT&P fabricated these constant assemblies from A36 carbon steel. They were designed for temperatures up to 185°F, and a load of 15,737 lb. The constants are capable of a downward total travel of 2″ and are 61″ L x 25″ W x 39″ H. Standard load and travel tests were conducted prior to shipment.

When it comes to supporting piping and related components that experience significant vertical movement, constant spring supports are the go-to solution. These specialized supports are designed to keep the load consistent throughout the full range of movement, eliminating any significant deviations. But what makes them indispensable for industrial applications? Let’s break it down.

What Are Constant Spring Supports?

Constant springs maintain a steady supporting force as pipes expand and contract due to temperature changes. They come in horizontal or vertical designs and can be customized to handle various loads, movements, and configurations. Their ability to adapt to dynamic conditions ensures the integrity and efficiency of piping systems across diverse industries.

Key Benefits of Constant Spring Supports

  1. Manage Pipe Movement: Handle changes in pipe position caused by temperature fluctuations.
  2. Maintain Alignment: Prevent misalignment, ensuring pipes stay in proper positions.
  3. Reduce Thermal Stress: Minimize stress caused by thermal expansion and contraction.
  4. Adapt to Variable Loads: Provide reliable support in changing conditions.
  5. Versatility: Perfect for both high-temperature and cryogenic systems.

Constant spring supports find their way into a wide range of applications, including:

  • Piping Systems: Essential in refineries, power plants, and chemical processing facilities.
  • HVAC Systems: Support ducts in heating, ventilation, and air conditioning systems.
  • Steam Systems: Ensure proper alignment in steam piping for manufacturing and power generation.
  • Oil and Gas Pipelines: Compensate for temperature changes over long distances.
  • Process Equipment: Safeguard reactors, heat exchangers, and vessels from stress-induced damage.
  • Rotating Equipment: Reduce stress on pumps and compressors by supporting connected piping, prolonging equipment life.

Spotlight on U-Type Constant Springs

U-Type constant springs are particularly popular for their ability to provide steady support to pipelines, ducts, and other structures experiencing thermal movement. These springs play a vital role in maintaining system integrity and preventing damage across various industrial settings.

From managing thermal expansion in pipelines to safeguarding critical equipment, constant spring supports are the unsung heroes of industrial operations. Their reliability and adaptability make them an invaluable asset across countless applications.

At our Houston-based facility, we design and manufacture constant spring supports with unmatched speed and precision. Operating 24/7, we are equipped to handle both small emergency orders and large-scale production needs. Our expertise spans industries like energy, oil & gas, petrochemicals, manufacturing, and more—delivering solutions globally. Our wide range of industry expertise demonstrates our unique ability to provide solutions across the globe in every sector we serve.

PT&P REF. ORIGINAL POST 03242015

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110 Custom Pipe Clamps for a Construction Company
October 29, 2024

110 Custom Designed Pipe Clamps For A Construction Company In Ohio

Type: Pipe Clamps
Size: 12″ wide | 42″ Dia. pipe
Material: A36 carbon steel with PVC pad
Testing: Standard Q.C. Inspections

Piping Technology and Products, Inc. custom-designed a total of 110 of these large pipe clamps for an interstate natural gas pipeline in Ohio. The pipe clamps are fabricated from A36 carbon steel with PVC pad bonded to the clamp’s inside radius. The pipe clamps have a physical size of 12" wide, for a 42" diameter pipe. Standard QC inspections were performed with a turn-around time of 8 weeks.

The interstate natural gas pipeline project focused on constructing a 256-mile route. The project, targeting the energy needs in the Midwest at the time. Clearing activities started in Lake Marlboro, Nimishillen, and Washington townships, setting up the groundwork for the pipeline route that would run from eastern Ohio to the northern and western parts of the state.

The exact number of pipe clamps stocked by Piping Technology & Products (PT&P) can vary in the hundreds, as we offer a wide range of pipe clamps to accommodate different pipe sizes, materials, and load requirements. PT&P typically stocks a variety of types, including standard pipe clamps, adjustable clamps, riser clamps, U-bolts, and custom clamps, such as these, designed for specific applications however, in most cases we fabricate specifically in our Houston headquarters to the project and client needs based on the design where sizes, material, and technical requirements may vary.

This year, we made significant capital investments in our manufacturing operations to enhance efficiency and deliver top-quality support structures in greater quantities, enabling faster field deliveries.

PT&P REF. ORIGINAL POST 04302018

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Big Ton Spring Supports Custom Designed for a Chemical Plant in Singapore
October 22, 2024

Big Ton Spring Supports Custom Designed For A Chemical Plant In Singapore

Type: Big Ton Spring Supports
Material: Carbon Steel/SAE 5160H
Design: 1.75″ up & Operating Load 130,642 N
Testing: Standard Load & Travel Tests

PT&P custom designed big ton spring supports for a chemical plant in Singapore. These supports are ideal for bearing the weight of large, heavy equipment such as compressors, vessels, and pumps in power and petrochemical plants. The supports feature a carbon steel housing and frame, with a spring coil made from SAE 5160H. The design allows for a controlled movement of 1.75 inches upward under an operating load of 130,642 N. This solution prevents the need for a complete redesign of the piping system, offering significant cost savings to the customer. These custom Big Ton supports were delivered within six weeks.

Throughout the years, we’ve encountered numerous instances where clients have approached us with unique and unconventional applications requiring either a completely new product or modifications to an existing one. A prime example is our Big Ton, which was developed in response to a client’s request for a support capable of bearing 1 million pounds. We’ve designed Big Tons for a range of industries, including LNG, petrochemical, refining, and PDH facilities. Beyond design and manufacturing, these supports undergo thorough in-house testing by our QC teams to ensure full functionality before being shipped to the client. Click here to watch a video to see how this support can be adjusted in the field.

PT&P REF. ORIGINAL POST 12262017

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Compact Spring Supports Designed for an Oil Refinery
October 15, 2024

Compact Spring Supports Designed For 9K Load At An Oil Refinery

Type: Compact Spring Supports
Material: Carbon Steel w/ Hot-Dipped Galvanized (HDG)
Design: 9,000 lb. Load | +/-0.125″ Vertical Movement
Testing: Load Testing

PT&P custom-designed 76 compact spring supports also known as “disc spring” supports, for a major oil refinery. These specialized supports are ideal for placement beneath equipment flanges to minimize excessive loads on delicate machinery. As an industry leader, PT&P has been supplying custom compact springs globally for over a decade.

Compact spring supports are essential for small-travel systems, helping prevent equipment failures, ensuring safe plant operations, and reducing operational costs. They provide the same load-bearing capacity as conventional springs while requiring 50% less space. If unaddressed, pipe strain can lead to issues such as misalignment, thermal expansion, and pipe lift-off, placing undue stress on expensive equipment.

In a typical refinery, pipe strain-related problems can result in pump repair costs exceeding $15 million annually. Compact springs play a vital role in supporting centrifugal pumps, compressors, air-cooled heat exchangers, vessels, and steam turbines. Additionally, they help facilities meet regulatory standards, including API, ASME, UBC, and compliance requirements from OSHA, EPA, WISHA, and other governing bodies.

The springs are constructed with stainless steel Belleville washers, while the housings are made from A-36 carbon steel and finished with a hot-dipped galvanized coating for corrosion resistance. Each assembly stands 3 inches tall, designed to support a 9,000-pound load with a movement capacity of +/- 0.125 inches (upward). Prior to shipment, every assembly underwent rigorous load testing to ensure performance.

Compact springs are engineered to reduce excessive loads on process equipment by effectively managing nozzle loads and maintaining flange seals. They can be installed directly beneath equipment, offering both space efficiency and performance reliability. Additionally, these springs are ideal for corrosive environments, such as those exposed to saltwater, marine air, or harsh chemicals. By utilizing corrosion-resistant materials like stainless steel or applying amorphous glass coatings, compact springs are built to withstand even the most challenging conditions.

PT&P REF. ORIGINAL POST 10192021

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Variable Supports Fabricated in 48 hours for an Emergency Plant Shutdown
October 1, 2024

Variable Spring Supports Fabricated In Less Than 48 Hours For An Emergency Plant Shutdown Overseas In The Asia-Pacific Region

PT&P received a rush order for variable spring supports at 4:41 pm, quite late into the workday; however, this is business as usual, our manufacturing facility in Houston, TX operates 24/7 to support our customers.

Variable Spring Supports Fabricated In Less Than 48 Hours For An Emergency Plant Shutdown Overseas In The Asia-Pacific Region Variable Spring Supports Fabricated In Less Than 48 Hours For An Emergency Plant Shutdown Overseas In The Asia-Pacific Region
In this case, the customer’s olefins plant was experiencing significant losses and urgently needed to replace the springs to resume operations. Seven variable springs were designed, fabricated, and shipped within just two days to minimize downtime.

The F-type variable spring support is designed to support piping from below, directly from the foundation, concrete column, or supporting structural pipe rack steel. Adjustment is made by inserting a bar into holes in the load column and turning the load column as a jackscrew. As global leaders in variable spring manufacturing, we leveraged our adaptive manufacturing processes, utilizing pre-fabricated in-house components that allow for quick assembly as soon as orders are placed.

These variables were fabricated from carbon steel and hot-dipped galvanized for corrosion protection. They are designed to support loads ranging from 713 lb. to 1668 lb. and movements of 0.148″ to 0.133″. Load and travel tests, along with Q.C. inspections were performed before shipment.

Variable springs are used in many applications that include:

 

  • Paper and Pulp Mills
  • Petrochemical refineries for plastics, chemicals, polymers
  • Renewable plants for solar, carbon black, hydrogen, blue ammonia, and biochar facilities
  • Power plants for nuclear and fossil fuel power

PT&P REF. ORIGINAL POST 04132021

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Hydraulic Snubbers Designed for LLDPE Chemical Plant
September 24, 2024

Hydraulic Snubbers Designed For Lldpe Chemical Plant

The Fronek A/DE Hydraulic Snubber is a manifold-designed hydraulic device that includes a high-pressure main cylinder, a flow control section with dual-stage velocity-sensitive poppet valves, and a spring-energized reservoir.   These Fig. 511 AD long hydraulic snubbers were created for a linear low-density (LLDPE) chemical plant in Louisiana. The snubbers with two (2) rear brackets range in length from 34-⅝” to 49”. They are designed with spherical, self-aligning ball bushings that allow for + 5° of angular motion or misalignment.  The snubbers can handle maximum loads varying up to 5520 lb. Cylinder sizes are 1-½” and 2-½” and have a 6” stroke. The hydraulic fluid is petroleum based and the seals are a mix of buna-nitrile and polyurethane and the pressurized hydraulic reservoir allows mounting in any spatial orientation. The snubbers are painted with a primer that utilizes zinc filled powder manufactured by Tnemec. Ⓡ  The formulation for the primer is Series H90-97 | Tneme-Zinc. Ⓡ

Specific applications where hydraulic snubbers are commonly used include:

  • Power Plants (Nuclear and Thermal): To protect piping and equipment from seismic events or pressure surges.
  • Petrochemical and Oil Refineries: To mitigate damage from vibrations, pressure fluctuations, and thermal expansion.
  • Industrial Piping Systems: To prevent failure due to dynamic forces like water hammer or large temperature swings.
  • Bridges and Structures: To absorb and reduce the effect of seismic or wind-induced forces.
  • Marine and Offshore Platforms: To protect against waves and operational vibrations.

Hydraulic snubbers are critical in environments where sudden forces could lead to catastrophic failures or damage. At both Fronek A/D and PT&P, we offer a wide range of experience and expertise in the manufacture and design of various pipe supports while maintaining a competitive price. We also offer 24×7 web-based emergency services, providing field service and quick turn-around time when you need it most.

PT&P REF. ORIGINAL POST 06212016

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100-E Type Constant Spring Supports Custom Designed for a Power Plant in Canada
September 17, 2024

100-E Type Constant Spring Supports Custom Designed For A Power Plant In Canada

Type: Constant Spring Supports
Size: 52 1/4″ x 62 1/8″
Material: Carbon Steel
Design: Operating Load 21,600 to 26,350 lbs & of 3-7” of Movement
Testing: Standard Load & Travel Tests

PT&P custom designed and manufactured constant spring supports for a power plant in Canada. Four constant assemblies were fabricated using carbon steel and hot-dip galvanized to prevent corrosion. The custom-designed constants, sized and identified as 100-73 Type-E and 100-69 Type-E, were manufactured for a thermochemical process within the plant. These supports are designed for operating loads of 21,600 lbs. and 26,350 lbs., respectively, both with an operating movement of 3.7 inches. Load and travel testing were completed before shipment.

Constant spring supports are used for piping and related components where higher levels of vertical travel occur. Their job is to support the working load over the whole travel area while keeping it constant, i.e. without any considerable deviations. Constant spring supports are available in horizontal or vertical designs, and in a variety of sizes to accommodate different loads, movements, and hanger arrangements.

They maintain a consistent support force as pipes expand or contract with temperature changes. This helps:

      • Manage Pipe Movement: Accommodates changes in pipe position due to temperature variations.
      • Maintain Alignment: Keeps pipes properly aligned, preventing misalignment issues.
      • Reduce Thermal Stress: Minimizes stress caused by thermal expansion and contraction.
      • Handle Variable Loads: Provides reliable support under varying conditions.
      • Ensure Versatility: Suitable for both high-temperature and cryogenic systems.

Our capability to quickly design and manufacture these supports is unmatched in the industry. Our Houston-based operations run 24/7, ensuring we can handle small emergency requests and maintain high production capacity for our clients’ needs. Constant springs can be used in several applications. We have designed and manufactured for different industries all over the world. Some of the industries we have supported are energy and utilities, geothermal, oil & gas, petrochemical & chemical, renewable energy & environmental solutions, industrial & manufacturing, and infrastructure.

Our wide range of industry expertise demonstrates our unique ability to provide solutions across the globe in every sector we serve.

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