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About Fronek Anchor/Darling Enterprises, Inc.

As one of PT&P's wholly owned subsidiaries, Fronek Anchor/DarAnchor Darling Facilityling Enterprises, Inc. is a leading supplier of hydraulic, mechanical, and rigid restraints, including the dynA/Damp snubber. PT&P acquired Anchor/Darling Enterprises, Inc. from the Shaw Group in August 2004.

Located in Laconia, New Hampshire, Fronek Anchor/Darling Enterprises, Inc. is an ASME Nuclear Stamp ("NS") Certificate Holder. Anchor/Darling offers the following main product lines:



  • Proven hydraulic snubber built in accordance with the requirements of the ASME Boiler and Pressure Vessel Code. Its manifold configuration eliminates external tubing and its pressurized reservoir allows installation in any spatial orientation.

    • Hydraulic SnubberFor use on piping systems or equipment when unrestrained thermal movement must be allowed, but which must be restrained during impulsive or cyclic disturbance. The unit is not effective against low amplitude, high frequency movement. The preferred usage with standard settings is to prevent destructive results due to earthquakes, flow transients, or wind load. Special settings are available to absorb the continuous thrust resulting from safety valve blow-off or pipe rupture.

  • DynA/Damp non-locking mechanical snubber with a simple, rugged design and corrosion resistant construction for superior performance within many environments, also built in accordance with ASME Code requirements.

    • DynA/Damp snubberDesigned to protect critical power plant components during dynamic loadings caused by seismic disturbances, slamming of check valves, unstable pump characteristics, discharge of safety relief valves, water hammer, or other transient forces. Unlike other mechanical snubbers, the dynA/Damp snubber is ruggedly designed and employs no complex clutches or spring mechanisms. It never needs lubrication or adjustment, and can easily be tested in place. Gradual movements, such as those caused by changes in temperature, are virtually unrestricted.

  • Locking mechanical snubber for use as whip restraints for large pipes and vessels, and relief valve reaction forces. This type of restraint is available in load capacities ranging between 10 and 125 kips with stroke and end connections to fit customer specified applications.

    • Mechanical SnubberDesigned to protect critical power plant components by preventing shock forces from causing damaging motions in piping and related systems during seismic disturbances or other transient forces. The mechanical snubber controls damaging motions by becoming a load-carrying member between the piping and the structural member in the event of an abnormal motion or disturbance. Otherwise, during normal thermal motion and operation it telescopes freely in either direction through its normal operating stroke.

  • Sway strut and sway brace assemblies used to control vibration, absorb shock loadings, and restrain the movement of pipe resulting from thermal expansion.Sway Brace and Sway Strut


Verify Fronek Anchor/Darling Nuclear Stamp

August, 2004 News Release: Piping Technology & Products, Inc. Acquires Companies from The Shaw Group, Inc.



Mailing: P.O. Box 34506, Houston, TX 77234-4506 Location: 3701 Holmes Road, Houston, TX 77051
Our Subsidiaries: U.S. Bellows: Metallic & Fabric Expansion Joints, Bellows
Sweco Fab: ASME Vessels, Pig Launchers, Spectacle Blinds
 Pipe Shields: Pre-Insulated Pipe Supports, Slides, Guides & Anchors

Fronek Anchor/Darling
: Snubbers, Sway Struts & Sway Braces
Phone: (713) 731-0030 Toll-Free: (800) 787-5914 FAX: (713) 731-8640 info@pipingtech.com

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