Outlet Collector Pressure-Drop Assessment

Why do outlet collectors only rarely fail, even when subjected to pressure-drops well above the design basis of the collector? The answer lies in the design approach which incorporates simplifying assumptions to accommodate a tractable and conservative approach.  These conservatisms can be relaxed where necessary to give results much more in line with actual experience […]

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Operability And Fitness-for-Service (FFS) Of ASME Equipment In Nuclear Power Plants

Bringing Order and Logic to the Evaluation Process There is a multitude of documents and reports that describe the damage mechanisms of ASME pressure equipment (vessels, pumps, valves, piping, and tanks, and their supports) in nuclear power plants. Thousands of pages published by EPRI, the NRC, ASME, NACE, research laboratories, utilities, contractors, and others, to […]

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Fitness-For-Service API 579-1/ASME FFS-1: Substantive Changes to the 2016 Edition

Contributing Authors: Eileen Chant, Greg Epremian, Ranjan Nadarajah, Mark Stonehouse  Summarized herein are the substantial changes to API 579-1/ASME FFS-1, Fitness for Service, that were incorporated in the 2016 edition, as reviewed by Becht Fitness for Service experts. API 579-1/ASME FFS-1 is a Standard jointly published by API and ASME.  The purpose of the document […]

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Piping Settlement Screening Tool

Settlement of a pipe support foundation is usually not a big deal to assess. A local piping flexibility model will reveal if the settled support keeps the pipe bending stresses within the allowable codes and, if the bending stresses are unacceptable, modifying the support and monitor periodically for further settlement is normally a quite manageable […]

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Fitness-For-Service API 579-1/ASME FFS-1 – Substantive Changes in the 2016 Edition

Authors: Eileen Chant, Greg Epremian, Magnus Gustafsson, Ranjan Nadarajah, Mark Stonehouse API 579-1/ASME FFS-1 is a Standard jointly published by API and ASME.  The purpose of the document is to provide a consensus of methods to quantitatively evaluate commonly observed damage to in-service pressure equipment.  Since it was first issued by API in 2000, this […]

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Fitness-for-Service of Damaged Buried Pipe — What Code Case N-806 Is and Is Not

This article outlines the procedure to evaluate the fitness-for-service of corroded buried pipe, and explains what CC N-806 covers … and what it does not cover. What are the Damage Mechanisms in Metallic Buried Pipe? The inspection of a buried metallic pipe, after years of service, can reveal that the pipe has little if any […]

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Brittle Fracture Resistance Workbook API 579-1/ASME FFS-1 Approach (Fitness-For-Service)

Description Process vessels such as towers, drums and heat exchangers may be exposed to low temperatures as a part of normal operation or as the result of an upset condition. Carbon and low alloy steels typically used in process vessels undergo a transition from ductile to brittle behavior as temperature is reduced and are at […]

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Statistical Analysis of Non-Destructive Examination Data

In 2008, Becht Engineering was awarded a project by the Materials Technology Institute (MTI) to develop an inspection guideline document and software tool for the collection and analysis of inspection data for piping, piping components and pressure vessels. Dr. Eileen Chant , as project manager, collaborated with Bob Sims of Becht, Dr. Mark Stone of […]

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Materials Technology Institute Polymeric Risk-Based Inspection Pilot Project

Becht was selected by the Materials Technology Institute (MTI) to adapt its Risk-Based Inspection (RBI) methodology to develop an RBI work process for above-ground, fiberglass reinforced polymer (FRP) storage tanks.  The Becht RBI methodology, which complies with API RP 580, was initially used for metallic fixed equipment and has been expanded to other types of […]

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Cracks in Cement Lining and Coating

I was the Principal Investigator for the recently issued EPRI Technical Report “Guidelines for the Evaluation of Cracks in Cement Linings and Coatings”, Technical Report 3002000599, December 2013. I worked with EPRI’s Doug Munson to develop these guidelines to help nuclear plant utility engineers make fitness-for-service assessments of damage in cement-lined and cement-coated pipes. Cement […]

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