These hydraulic snubber assemblies were designed with maximum load capacities ranging from 1700 lb. to 59,400 lb. All of the snubbers were provided with an overall stroke of 6” and were preset to the midpoint of the total stroke, meaning that during operation, these snubbers could accommodate piping deflections of  +/- 3” from the installed position.

The piston diameters range from 1-1/2″ to 6″ and the total assembly length ranges from 31-1/2″ to 220″. The largest assembly required a custom extension section to eliminate the risk of buckling under compression loads. Two-thirds of the assemblies included dual end brackets and the remaining assemblies included an end bracket/clamp combination. The housing, extension piece and end brackets are fabricated from carbon steel, while the cylinders, pins and two of the end brackets are fabricated from polished stainless steel. Standard “lock and bleed-down” tests were performed prior to shipping to a LNG processing facility in Peru.

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140,700 lb. Load Hydraulic Snubbers

Side View of Snubber

Anchor/Darling Enterprises, Inc., a wholly owned subsidiary of Piping Technology & Products, Inc. designed and fabricated these hydraulic snubbers for a power plant in Turkey. They are adjustable type snubbers with two rear brackets. The hydraulic snubbers can absorb loads up to 140,700 lb.

Design:

Temperature: 375°F
Pressure: 1,750 PSIG
Stroke: 6″

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Mechanical Snubbers for a Refinery

Sizes of mechanical snubbers for this project range between 18″ and 80″ in the retracted position. The maximum load capacity ranges between 700 and 10,000 lb. Mechanical snubbers function to restrain thermal movement in abnormal circumstances such as earthquakes, hydraulic hammer, and upstream pipe rupture. The snubbers were tested at both high and low rates of loading on a computer controlled hydraulic test machine to ensure quality assurance.

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Snubbers with Yoke Clamps for a LNG Plant

Snubbers are restraining devices. They allow free thermal movement during normal operations but restrain in abnormal circumstances such as with an earthquake. These snubbers were fabricated from carbon steel. They measure 2 1/2” x 24” and the yoke clamps have pipe sizes of 23” and 25”. Each snubber weighs 890 lb. and has a travel capacity of 24”. Designed for the support of a cryogenic line, these snubbers can handle loads of up to 2,900 lb.

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25,000 lb. Load Hydraulic Shock Suppressor and Clamp Assemblies

Piping Technology & Products, Inc., recently designed and manufactured fourteen PTP Fig. 2100 Hydraulic Shock Suppressor and pipe hanger assemblies for a Steel Company in North Dakota. The assembly consists of a 12 diameter alloy clamp and a PTP Fig. 2100 Hydraulic Snubber with cylinder size of 3 1/4 diameter and 5 stroke load. They are designed to accommodate loads of 25,000 lb. and high temperatures up to 1,100 F. To ensure the products quality, dimension and movement tests were conducted prior to shipment.

PT&P also designed and manufactured Variables Spring Hangers and various Pipe Supports Assembly Components in a range of different specifications and materials for this project.

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14 1/2" diameter 225,000 lb. load Hydraulic Snubber

Piping Technology & Products, Inc. recently designed and manufactured a hydraulic snubber weighing 4000 pounds for an oil refinery in Mexico.  The snubber is fabricated from carbon steel with dimensions of 17 x 101. It supports a maximum load of 225,000 lbs. The purpose of the hydraulic snubber is to reduce shock loading created by events such as water hammer or an earthquake. To meet customer specifications, the hydraulic snubber was coated with a three-coat paint system.

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14,000 lbs. Load Hydraulic Shock Snubbers

Piping Technology & Products recently designed and manufactured four fig. 2100 hydraulic shock snubbers for a refinery in California. Carbon steel was used to manufacture these snubbers. They support a maximum load of 14,000 lbs., have a 3” cylinder, and 5” stroke load.  This was a custom job where the customer provided the figure number, cylinder size, and stroke load; we built the snubbers according to these specifications.

Do you see a need for hydraulic snubbers 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.

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Hydraulic Snubbers in Assembly

Shown above are hydraulic snubbers which are used to protect critical components in refineries, power plants and other industrial plants from sudden movement by the attached piping system. Engineers specify these for systems subject to sudden accelerations caused by earthquakes, extreme wind loads or water hammer.Hydraulic snubbers resist sudden rapid movement of the pipe by limiting the flow rate of the fluid inside the snubber. The device is designed to slow movement, such as would be expected during thermal expansion, has practically no resistance, but sudden rapid movement is resisted with a force proportional to the velocity raised to a power, where the power is determined by the orifice valve and flow pattern in the design. Selection of materials and liquids used will depend on the environment where the snubber is installed.

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Hydraulic Snubbers Protect Critical Components In Refineries

The photograph above shows hydraulic snubbers which are used to protect critical components in refineries, power plants and other industrial systems from sudden movement by the attached piping system. Engineers specify these devices for systems which are subject to sudden accelerations caused by earthquakes, extreme wind loads or water hammer. The insert at the upper left shows eight snubbers, some are different sizes and six have dust covers to protect the piston seal. The snubber at the bottom has hardware attached so it is ready to be installed. Hydraulic snubbers resist sudden rapid movement of the pipe by limiting the flow rate of the fluid inside the snubber. The device is designed so slow movement, such as would be expected during thermal expansion, has practically no resistance, but sudden rapid movement is resisted with a force proportional to the velocity raised to a power, where the power is determined by the orifice valve and flow pattern in the design. Selection of materials and liquids used will depend on the environment where the snubber is installed.

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