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News

 
 

LISEGA Inc. Announces Acquisition of OST Services, LLC.        

Kodak, TN - April 1st, 2015 - LISEGA Inc, a market leading provider of engineered pipe supports, restraints, snubbers, and related technology, has completed its acquisition of OST Services LLC.

OST Services Inc. has specialized in inspection and condition assessment activities associated with engineered pipe supports applied throughout the aftermarket of the power industry, petro chemical, pulp and paper, marine and heavy industrial facilities. Located out of Providence, Rhode Island, the company will continue to operate under its present name and management as a subsidiary of LISEGA Inc.

With this acquisition LISEGA strengthens its leadership position as a global pipe support manufacturer that delivers quality and effective products, and now services to a variety of industries and our customers. 

Introduction of SolidWorks        

Through the use of SolidWorks Premium, and SolidWorks Simulation Professional, OST Services can now offer Finite Element Analysis, and 3D Modeling services to our customers. Finite element analysis (FEA) is a computerized method for predicting how a product reacts to real-world forces, vibration, heat, fluid flow, and other physical effects. After generating a 3D model, the Finite element analysis shows whether a product will break, wear out, or work the way it was designed.

 

Pole Camera Inspection Services

OST Services has developed a system to access remote andinaccessible locations using an adaptable pole camera arrangement. For additional information, refer to our flyer TF-PC on the Resources section of our web site.


Anti-Slip Friction Clamp

A new anti-slip assembly is available through OST Services. The assembly has been developed not necessarily as a dead-weight support, but as a means to keep assemblies in place that can tend to loosen and slip down vertical sections of piping.

The assembly is easily adaptable to fit, or accommodate, a wide range of pipe diameters, by simply removing redundant pieces of the assembly. Typical uses involve securing guides and restraints in place without welding to piping. This is particularly useful for P91 materials, or other similar material encountered throughout various piping industries. other uses involve the support of insulation to remove sections below for nondestructive testing activities, pipe re-work, etc.

The design of the Anti-Slip Friction Clamp is customized to accommodate the differential expansion properties of the pipe and the clamp. The design ensures that the normal force exerted on the pipe is kept to a minimum, while still developing the friction force required for the clamp's supporting effort. Consideration has been given to keeping the stresses in the clamp at a level low enough to prevent long term creep and relaxation, which would decrease the supporting capacity of the clamp. Additional information is also provided on OST Project Report #224.


Mechanical Arrestors

To address various abnormal loading conditions such as earthquake safety valve discharge, wind loads, turbine trip out, etc., restraint controlled devices are typically applied at strategic locations along the High Energy piping systems and related power plant equipment. Depending upon the load case, mechanical arrestors or hydraulic snubbers may be utilized upon close review of performance characteristics.

Unlike a hydraulic snubber that will telescope even if non-functional, the failure mode associated with a mechanical arrestor often involve a jam.

In either case, the arrestor may not perform its intended purpose to control displacements and loads associated with these abnormal occurrences. However, in the case of a mechanical snubber, once jammed it can act as an unanticapated thermal restraint, which can lead to fatigue and conceivably cracking at strategic locations along the piping system. Additional information on a project involving a replacement program and optimization of a restraint control network involving mechanical arrestors is outlined in OST Services Project Report #276.