Blog Category: SHOCK CONTROL, RESTRAINT & SUPPORT DEVICES

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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Mechanical Snubbers Designed for an Industrial Chemical Plant in Brazil
June 25, 2024

Mechanical Snubbers Designed For An Industrial Chemical Plant In Brazil

Type: Mechanical Snubbers
Size: Length: 40-3/8” to 60-3/4″
Material: Carbon Steel | Hot-dipped Galvanized | Paint
Design: 1,000 lb.  – 6,000 Load | Stroke: 4″ – 5″

Mechanical snubbers are designed to allow pipe deflection in tension or compression when operating under normal conditions, but if an impulse load occurs (such as a water hammer, earthquake, wind, or other transient forces), the snubber becomes activated and acts as a rigid restraint to limit pipe movement. So, in general, mechanical snubbers t have two modes of operation. In passive mode, the resistance mechanism is disengaged and the snubber “free wheels” with very low resistance. In active mode, the mechanism is engaged, and the snubber limits the acceleration to a low threshold value, becoming a rigid restraint. Mechanical snubbers are used in nuclear, geothermal, and other green energy plants, as well as, the traditional chemical, refinery, and power plants. Our superior design combined with rugged construction and corrosion-resistant parts makes these units extremely reliable for a wide range of loads and movements. Typically mechanical snubbers require no maintenance. Our team of engineers can also custom design and test snubbers to accommodate your unique application.

For this particular project, in addition to the mechanical snubbers, we also supplied pre-insulated cold supports, constants, variables, and rod hangers which were delivered ahead of schedule to meet the client’s delivery needs. PT&P and its subsidiaries design and manufacture the largest range of products for piping systems globally. With today’s supply chain considerations, projects can mitigate risk by working with a single strategic supplier and ensuring timely project completion and success. Our approach is unique. The key factors are our focus on the following:

  • Systems – Proprietary systems allow PT&P to manage complexity
  • Engineering – 10 Industrial Engineers in Production
  • Automation – extensive investment in automation
  • Quality – IS0 9001 certified with a large QA team
  • Training – programs to grow personnel to highly artisan/skilled functions (e.g. TIG Welding Gauge Material)
  • Scale – 500+ Production Employees and over 10% of the team are engineers
  • Experience – 40+ years with 5M+ products in service

PT&P REF. ORIGINAL POST 07152022

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Sway Braces Designed for a Mechanical Equipment Supplier
April 23, 2024

Sway Braces Custom Designed For A Mechanical Equipment Supplier

Type: Fig. 555 Sway Braces
Size: 34-7/8” to 42-1/4″
Material: A36 carbon steel | Hot-dipped Galvanized
Design: 17,827 lb. Ld. | 12″ Travel | 7,200 lb. Spring Rate

PT&P custom designed Fig. 555 sway braces for the mechanical equipment supplier in Canada sound robust and tailored to specific requirements. Here’s a breakdown of the specifications:

  • Material: Carbon steel, hot-dipped galvanized. This ensures corrosion resistance and durability, especially important for industrial applications where the environment can be harsh.
  • Length Range: The sway braces vary in length from 34-7/8″ to 42-1/4″. This indicates flexibility in design to accommodate different distances between anchor points or points of attachment.
  • Operating Load Range: Largest Sway Brace: Designed for an operating load of 17,827 lb. This suggests it’s meant for heavier-duty applications where substantial loads need to be supported.
  • Smallest Sway Brace: Designed for an operating load of 200 lb. This indicates versatility in design, catering to lighter loads as well.
  • Design Travel: Largest Sway Brace: Designed with a design travel of 12″ in either compression or extension. This accounts for significant movement allowance, essential for accommodating thermal expansion or contraction in the piping system.
  • Smallest Sway Brace: Designed with a design travel of 9″ in either compression or extension. Though smaller, it still allows for adequate movement within the system.
  • Spring Rate: Largest Sway Brace: With a spring rate of 7,200 lb. per inch, it demonstrates a higher stiffness, suitable for handling heavier loads while still providing the necessary flexibility.
  • Smallest Sway Brace: With a spring rate of 1,800 lb. per inch, it offers a lower stiffness, ensuring smoother movement and accommodation of lighter loads.

These specifications indicate a thoughtful design process, considering factors such as load capacity, movement requirements, and environmental conditions. It’s a testament to PT&P’s expertise in providing tailored solutions for piping system needs.

It makes perfect sense that these sway braces require custom design and fabrication from PT&P due to their unique specifications exceeding standard parameters. By configuring each sway brace with a tailored combination of materials, spring coils, housings, and internal components, PT&P ensured that they could effectively handle the non-standard loads and movements specified for the project.

Customization is crucial in engineering projects, especially when dealing with varying environmental conditions, load requirements, and system configurations. By creating bespoke solutions, PT&P demonstrates their commitment to meeting the precise needs of their clients, ensuring optimal performance and reliability in the field.

This level of customization also highlights PT&P’s expertise and flexibility in adapting their products to meet specific project requirements, further solidifying our reputation as a trusted provider of engineered pipe support solutions.

PT&P REF. ORIGINAL POST 05152018

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Hydraulic Snubbers for an Ammonia Plant in Louisiana
February 20, 2024

Hydraulic Snubbers For An Ammonia Plant In Louisiana

Type: Hydraulic Snubbers
Design: 3,000-15,400 lb load/5″-12″ stroke
Material: Carbon Steel
Size: 31″ up to 148″ pin-to-pin and cylinder diameters from 2.5″ to 5″

Piping Technology & Products designed these hydraulic snubbers for an ammonia plant in Louisiana. The snubbers ranged in length from 31" up to 148" pin-to-pin and cylinder diameters from 2.5" to 5". They are designed for an operating load ranging from 3,000 lb. to 15,400 lb. and have a 5" to 12" stroke. Hydraulic snubbers are designed to protect the piping system when a sudden, heavy load is applied (such as an earthquake of high intensity), which can cause serious vibrations leading to damage and possible failure of the piping system.

Most hydraulic snubbers have a piston which is relatively unconstrained in motion at low displacement rates. At high displacement rates the piston "locks up", that is, the force required to move the piston increases substantially, usually as a result of the closing of a valve.

Hydraulic snubbers are used in many applications and are typically needed urgently in operational facilities. We have provided these products in all major verticals including refining, petrochemical, renewables, and power operations.. Our hydraulic snubbers are built in accordance with ASME Boiler and pressure vessel code and our Laconia, New Hampshire operations have ASME Nuclear Stamp "NS" for nuclear applications.

PT&P REF. ORIGINAL POST 11232016

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Mechanical Snubbers for a Refinery in Oklahoma
October 17, 2023

Mechanical Snubbers For A Refinery In Oklahoma

Type: Mechanical Snubbers
Size: Size MSA-10, 36″ OAL, and 30 1/2″ Pin-To-Pin
Material: Carbon Steel with HDG Finish
Design: Operating load of 15,000 lbs and a 6″ Maximum Stroke
Testing: Standard Load Tests

Piping Technology & Products supplied these mechanical snubbers with two end brackets fabricated from carbon steel with an HDG finish for a refinery in Oklahoma. They are size MSA-10, 36" OAL, and 30 1/2" pin-to-pin. The snubbers are designed for an operating load of 15,000 lbs and have a 6" maximum stroke. Standard load tests were performed before shipment. Mechanical snubbers have two modes of operation. In passive mode, i.e., motion caused by thermal loads, the resisting mechanism is disengaged, and the snubber "free wheels" with very low resistance. The mechanism is engaged in active mode, and the snubber limits the acceleration of motion to a low threshold value.

In addition to refineries, mechanical snubbers are preferred for use in nuclear plants as they do not contain hydraulic fluids that could degrade over time. Mechanical snubbers are also used in chemical, power, and green energy plants such as solar and geothermal. Mechanical snubbers are also used in earthquake zones to limit shock or sway caused by seismic disturbances.

PT&P REF. ORIGINAL POST 05112017

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Custom Sway Braces Designed for Coker Units
July 25, 2023

 

Sway Braces Custom Designed For Coker Units At An Oil Refinery In The Virgin Islands

 

Type: Custom Sway Braces with Ball Joints
Material: A36 Carbon Steel | Hot-dipped Galvanized
Testing: Standard Load Testing & Q.C. Inspection

PT&P custom-designed sway braces on an urgent basis to replace existing sway braces at one of the ten largest oil refineries in the world initially built over 75 years ago. These sway braces will be used in Coker units that have long displacements. They are fabricated with “ball joints” at both ends due to the “banana effect,” where the Coker unit will actually bend due to the heating of one side of the Coker unit faster than the opposite side. The casing, pipe, coils, threaded rods, turnbuckle, ball joints, etc., are all fabricated from carbon steel with a hot-dipped galvanized finish.

The maximum loads, spring rates and movements for the sway braces are as follows:

Max Load (lb) Spring Rate (lb/in) Max Movement (+ / – in)
2475 90 10″
3800 267 3-3/4″
3480 120 9″
2500 200 2″

Learn more about our sway brace products and place an order with us today!

PT&P REF. ORIGINAL POST 03102020

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Sway Strut & 3-Bolt Pipe Clamp Assemblies
October 25, 2022

 

Sway Strut &Amp; 3-Bolt Pipe Clamp Assemblies Designed For A Power Plant In California

Type: Sway Strut & 3-Bolt Pipe Clamp Assembly
Size: 30″ NPS | 44-1/8″ CC | 4″ Adjustment
Material: Carbon Steel | 304 Stainless Steel
Design: Restrain Tensile/Compressive Force in 1 Direction
Permit Movement in Other Directions

PT&P fabricated and designed sway strut and 3-bolt pipe clamp assemblies for a power plant in California. Supplied to a natural gas-fired, combined-cycle facility, the plant will produce over 620-megawatts of power and help to repower older generating infrastructure with more environmentally friendly technology. The assemblies are manufactured from carbon steel with 304 stainless steel load pins. They are designed for a 30″ diameter pipe. This sway strut has a pin to pin length of 44–1/8″ and comes with a standard 4″ adjustment. The sway struts are designed to restrain either tensile or compressive force in one direction while providing for movement due to thermal expansion or contraction in other directions.View Product.

PT&P REF. ORIGINAL POST 08132019

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Sway Struts Designed for an LNG Liquefaction and Export Facility
October 18, 2022

Sway Struts Designed For An Lng Liquefaction And Export Facility

Piping Technology & Products is a manufacturer of all types of pipe supports to areas all over the world ranging from sports stadiums to geothermal to infrastructure applications. In fact, many of the items you will see on our website were developed for the specific requirements of a customer who could not use the standard designs available in our industry. These sway strut assemblies were designed and fabricated for a large LNG liquefaction and export plant. Sway struts are used in a wide range of applications in power plants, chemical and refineries to restrain movement in tension (or X plane) while allowing lateral movement (in the Y and Z plane). These fig. 2100F, size C sway struts are designed with 4” adjustment for loads up to 4,500 lb. The pins are fabricated from a high alloy steel for added strength and the threaded rod ends are carbon steel and hot-dipped galvanized. The sway strut body was hot-dipped galvanized after the donut and pipe were welded. The rod ends and end brackets were galvanized a second time for added corrosion resistance after the holes for the IKO bearings and pins are enlarged to fit these component parts. The C-C dimension is 30-11/16” and a quality control inspection involving thread engagement was completed prior to shipment. Piping Technology and Products is a manufacturer of all types of pipe supports to areas all over the world ranging from sports stadiums to geothermal to infrastructure applications. In fact, many of the items you will see on our website were developed for the specific requirements of a customer who could not use the standard designs available in our industry. If you do not find what you need, or if you need technical advice, please contact us.

PT&P REF. ORIGINAL POST 06222021

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Sway Braces Designed to Absorb Pipeline Vibrations Leading into a Containment Shelter
April 19, 2022

Sway Braces Designed To Absorb Pipeline Vibrations Leading Into A Containment Shelter

PT&P manufactured Fig. 550B Sway Braces for preventing excessive loading on 12″ diameter flanged expansion joints leading into a containment shelter. The sway braces include our Fig. 30 Forged Turnbuckles, spring casing. and size 3 spring coils along with other internal components. They are fabricated from carbon steel, hot-dipped galvanized, and designed for a spring rate of 450 lb./in. These sway braces measure 91-3/8″ pin-to-pin and are suitable for full deflection forces from 200 to 1,800 lb. Initial pre-compressed spring forces are from 50 lb. to 450 lb. to dampen vibrations, oppose pipe sway and absorb shock forces.

Fig.550B Sway Braces

Sway braces are recommended for controlling vibration, absorbing shock loadings; guiding or restraining the movement of the pipe resulting from thermal expansion; bracing a pipeline against sway. The vibration control and sway brace is shipped and ready for installation. The rod coupling rotates with slight resistance and the tension test collar can be rotated by hand while holding the rod stationary.

The sway brace should be in the neutral position when the system is hot and operating, at which time the tension test collar should be hand tight. If it is not, the sway brace should be adjusted to the neutral position by use of the load coupling. The screws in the tension test collar need not be loosened, since they serve only to secure it to the load coupling.

 

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Sway Strut Assemblies Designed for an 8,000 lb. Load at an LNG Train
January 11, 2022

Sway Strut Assemblies Designed For An 8,000 Lb. Load At An Lng Train

PT&P manufactured sway struts for one of the largest LNG (Liquefied Natural Gas) operations in the world. LNG, considered a “Clean Energy” and recognized as the cleanest fossil fuel, is used in several ways in our daily lives for heating, cooking, and generating electricity. LNG is also used commercially to manufacture products like fertilizers, paper, glass, clothing, food processing, medicines, commercial vehicles in addition to generating electricity. The use of LNG helps to reduce greenhouse gas emissions which helps to combat global warming. Piping Technology & Products manufactures sway struts for use in a wide range of applications in power, refineries, chemical, and solar plants to restrain movement in tension (or X plane) while allowing lateral movement (in the Y and Z plane). These Fig. 2100-F sway struts are designed with 4″ adjustment for loads up to 8,000 lb. The pins are fabricated from high alloy steel for added strength and the threaded rod ends are carbon steel and hot-dipped galvanized. The sway strut body was hot-dipped galvanized after the donut and pipe were welded. The rod ends and end brackets were galvanized a second time for added corrosion resistance after the holes for the IKO bearings and pins were enlarged to fit these component parts. The C-C dimensions are 42-1/4″, 41-1/2″, and 28″. A quality control inspection involving thread engagement and overall visual inspection was completed before shipment. In addition to sway struts, we have supplied over 3 million supports to LNG plants all over the world. PT&P has been a key supplier in LNG piping systems for almost every operator today.

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