Tag: Snubbers

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

Hydraulic Snubbers Designed for a Steam Generator in Mexico

February 26, 2018

Hydraulic Snubbers Designed For A Steam Generator In Mexico

Type: Hydraulic Snubbers
Size: 24″ up to 30″ Pin-To-Pin | Cylinder Dia. 1.5″ to 3.25″
Material: Carbon Steel
Design: 3,000 lb. to 20,000 lb., with a 6″ Stroke
Testing: Standard Quality Control

PT&P designed Fig. 510 AD short strut hydraulic snubbers for a steam generator at a facility in Mexico. The snubbers ranged in length from 24″ up to 30″ pin-to-pin with cylinder diameters of 1.5″ to 3.25″. A total of 48 snubbers were fabricated from carbon steel and designed for an operating load ranging from 3,000 lb. to 20,000 lb., with a 6″ stroke. Snubbers are used for systems where unrestrained thermal movement must be allowed except during cyclic disturbance. 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.

​How to Inspect a Hydraulic Snubber

November 27, 2017

Follow these four steps when inspecting a hydraulic snubber:

  1. Inspect welded attachments
  2. Inspect the piston
  3. Inspect the fluid level
  4. Inspect hydraulic vent

Image

Hydraulic Snubbers Designed for an LNG Facility in Texas

September 6, 2014

Hydraulic Snubbers Designed For An Lng Facility In Texas

Fronek Anchor/Darling Enterprises, a division of PT&P, designed snubbers for a LNG facility in Texas. These Fig. 511 AD hydraulic snubbers range in size from 76″ – 85″ piston-to-piston and are fabricated from carbon steel. They are designed for a maximum load of 32,000 lb., 6″ stroke and have a 4″ diameter cylinder. 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. A cycle test throughout the full stroke from zero to fully extended was performed prior to shipment

Regarding dynamic restraint devices describe the limit stops.

August 6, 2014
Limit stops have free movement through deflection. Also a limit stop acts as a rigid support.

Regarding dynamic restraint devices describe how a snubber is activated?

July 28, 2014
A snubber is activated under transient loads. The snubber is a passive element under normal conditions.

Regarding dynamic restraint devices describe the sway strut.

A strut is a load bearing component with limited deflection.

Regarding rigid supports what is the function of restraints?

Restraints prevent or resist free movement in one direction.

Hydraulic Snubbers Designed for a Geothermal Facility

March 19, 2012

Hydraulic Snubbers Designed For A Geothermal Facility

Fronek Anchor/Darling Enterprises, a division of PT&P designed and fabricated hydraulic snubbers for a geothermal facility in California. The Fig. 510 AD snubbers ranged in size from 34-3/4″ to 37-5/8″ piston-to-piston and were designed for a 50,000 lb. maximum load, 5″ cylinder size and a 6″ stroke. The Fig. 511 AD snubbers ranged in size from 56-15/16″ to 59-5/16″ P-P and were designed for a 20,000 lb. maximum load, 2-1/2″ cylinder size and a 6″ 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 complete destruction. A custom three-bolt pipe clamp fabricated from carbon steel was designed to fit in a limited space. A cycle test throughout the full stroke from zero to fully extended was performed prior to shipment.

What is Piping Technology?

February 1, 2011

PipingTechnology and Products is the name of our company specializing in pipesupports, pre-insulated supports, slide plates, snubbers, sway braces, and muchmore. In business since 1975, Piping Technology has over 35 years of experiencein the engineering and design of high-quality pipe supports. Piping Technologyis a parent company to four subsidiaries including U.S. Bellows, Sweco Fab,Fronek Anchor/Darling Enterprises, and Pipe Shields.

Piping Technology - 35 Acre Facility
Piping Technology: 35 Acre Facility

Snubbers: A General Overview

December 3, 2010

We recently posted a new Snubber article on our website.  It provides a technical look into both hydraulic and mechanical snubbers – how they are used in a piping system and how they function.  Most importantly, the article tells you the difference between various types of snubbers which is helpful in choosing the appropriate snubber for your piping system needs.

Snubbers: A General Overview

14 1/2&Quot; Diameter 225,000 Lb. Load Hydraulic Snubber
14 1/2" diameter 225,000 lb. load Hydraulic Snubber

Want to learn more about snubbers? Watch a recording of a past snubbers webinar now!
Access-Our-Webinar-Archives

September 2004 News

September 1, 2004

Piping Technology & Products, Inc. Acquires Companies from the Shaw Group, Inc

Houston, Texas, USA (August 31, 2004)-Piping Technology & Products, Inc. is proud to announce the acquisition of the essential assets and the manufacturing and engineering capabilities of the following companies from The Shaw Group Inc. (NYSE:SGR):

1. Shaw Fronek Company (FCI) Inc., Englewood, New Jersey

2. Shaw Pipe Supports Inc., Shreveport, Louisiana

3. Shaw A/DE, Inc., Laconia, New Hampshire

4. Shaw Pipe Shields, Inc., Vacaville, California

The Shaw Group has long been providing cost effective products for the power, petrochemical, chemical and commercial markets. PT&P is committed to upholding the standards that Shaw has set forth and will strive to make continuous improvement of all products and services. PT&P will work to understand and meet the requirements of new customers, as well as professionally execute all contracts acquired from Shaw.

“Piping Technology & Products is extremely excited about this acquisition,” said PT&P President Durga D. Agrawal. “The assets of these four companies strengthen our position as a leading producer in pipe hangers, mechanical and hydraulic snubbers, pre-insulated pipe supports and expansion joints.”

PT&P is consolidating the assets of some of the companies to the main location at 3701 Holmes Road, Houston, Texas 77051. The company can be reached via email at info@pipingtech.com, by fax at 713-731-8640 or by calling 713-731-0030 or 800-787-5914. PT&P can also be visited on the web at www.pipingtech.com.

This acquisition allows PT&P to enhance the existing product lines thus offering greater value and selection. The acquired companies will operate under the following company names:

1. Fronek Company (FCI), Inc.

2. FCI Pipe Supports, Inc.

3. Fronek Anchor/Darling Enterprises, Inc.

4. Pipe Shields, Inc.

About Piping Technology & Products, Inc.
Piping Technology & Products, Inc. and its wholly owned subsidiaries, U.S. Bellows, Inc. and Sweco Fab, Inc. manufacture a variety of high-quality engineered products. In business since 1975, PT&P has close partnerships with leading engineering and construction companies and is recognized as a leader in designing and manufacturing pipe supports, pre-insulated pipe supports and expansion joints. PT&P and its subsidiaries strive to, “DO IT RIGHT THE FIRST TIME, EVERY TIME” by providing quality products and expert service.

About The Shaw Group Inc.
The Shaw Group Inc. is a leading global provider of technology, engineering, procurement, construction, maintenance, fabrication, manufacturing, consulting, remediation, and facilities management services for government and private sector clients in the power, process, environmental, infrastructure and emergency response markets. A Fortune 500 company, The Shaw Group is headquartered in Baton Rouge, Louisiana, and employs approximately 17,000 people at its offices and operations in North America, South America, Europe, the Middle East and the Asia-Pacific region. For further information, please visit the Company’s website at www.shawgrp.com.

Specially Fabricated Sway Struts and Mechanical Snubbers

February 9, 2000
Specially Fabricated Sway Struts And Mechanical Snubbers
Specially Fabricated Sway Struts and Mechanical Snubbers

The photograph above shows sway struts and mechanical snubbers, which are combined and attached to large pipes and to stable structures. The snubber will dampen shocks and vibrations caused by sudden opening and closing of valves or even earthquakes. Piping Technology & Products, Inc. fabricated these for the steam piping in a power plant.

Are you in need of sway struts and mechanical snubbers for an upcoming project? Get pricing today!

Request-A-Quote

Recent Photos From the Shop

November 4, 1998
Stainless Steel Rectangular Expansion Joint
Stainless Steel Rectangular Expansion Joint for Machinery Exhaust Application
Gimbal Expansion Joint
Gimbal Expansion Joint
Hydraulic Snubbers
48" Stroke Hydraulic Snubbers
Roller Supports
X-Z Roller Supports for Big Ton Springs (20,000 lbs, 8" travel) for Pressure Vessels

PT&P Acquires Mobile Test Facility for Snubbers

October 31, 1998

In addition to the snubber test equipment obtained from Basic Engineers, PT&P has purchased a mobile snubber test facility from Commonwealth Edison, an electric utility in Illinois. The mobile snubber test trailer was in use at ComEd’s La Salle Nuclear facility.

This snubber test system is installed in a large truck trailer which was specifically designed to house a mobile test facility. The trailer is 47.5 feet long and is climate controlled with both heat and air conditioning. It has a one-ton crane that runs the length of the trailer and can be extended an additional 8 feet for loading and unloading snubbers. It also includes a small office.

The snubber test trailer contains test benches with a test capacity of 135,000 lbs. PT&P plans to begin providing field testing service to customers using this mobile facility.

Do you require snubbers for an upcoming project? Request a quote today!

Request-A-Quote

Improved Hydraulic Snubber in Final Stages of Development

October 18, 1998

PT&P has been developing and testing a better hydraulic snubber during recent months. Final independent tests at a university laboratory are confirming our tests.

PT&P’s new snubber design features a spring-loaded cylinder in the hydraulic reservoir which feeds the main cylinder. This design is more compact, and it allows the snubber to be mounted in any orientation. With the addition of test equipment from our recent acquisition from the Basic Engineers Auction, PT&P plans to have these snubbers in production by the end of this year.

3D Models of PT&P Spring Hangers and Hardware are now available for Intergraph’s PDS Plant Design Software.

Do you want more information about hydraulic snubbers? Visit our webinar archives today!

Access-Our-Webinar-Archives

Mechanical Snubbers

January 21, 1994
Mechanical Snubbers
Mechanical Snubbers

The two pictures above show mechanical snubbers which are used to limit the velocity of movement of piping systems when sudden accelerations caused by earthquakes, extreme wind loads or water hammer occur. These devices are designed with a brake drum which is activated by sudden movement. During gradual movement, such as would be expected during thermal expansion, the brake is not activated. Mechanical snubbers do not depend on hydraulic principles so they do not require maintenance during normal operation. The top picture shows the pins and swivel bearings used to link these snubbers to the system it will protect. The bottom pictures shows our inventory maintained for emergency deliver.

Want to learn more about snubbers, view our webinar archives today!

Access-Our-Webinar-Archives

Webinar General

Live New Webinar

Sign-up for a Live Technical Webinar…

Piping Design Course 300Width

Online Course

Piping Design and Analysis Influence on Pipe Support Selection and Design

Surveying a piping system? Need to change a current system?

This course is also great for…

• New Engineers, Management and Operations
• Field, Process, Maintenance and New Engineers
• Piping and Piping System Designers and/or Instructors

*This online course is approved for 8 hrs. P.E. Credits

Register Now
Top