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Becht Engineering Blog

In this section of the site contributing authors submit interesting articles relating to the various services, industries and research & development efforts of Becht Engineering.

Ten Questions That Must Be Answered Before Attempting Any Lift

When attempting any lift, regardless of how small or seemingly insignificant, there is some basic information that must be known and confirmed before you begin. As an industry, we do a great job planning critical and super lifts. These major lifts are executed with precision and are successful if the plan is carefully followed. We don’t do as well on the everyday routine or standard lifts. In most cases there is little or no planning - and when things go wrong - accidents result . In my experience, the majority of crane accidents result from lifts that are classified as standard when in fact there is nothing standard about any lift. There are ten questions that must be answered for any lift.  This list should be considered as the basics, i.e., a lift plan for standard lifts. The ten questions can be converted into a simple lift plan form. Then, require...
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New ASME PCC-1 Qualification Procedures for Flange Joint Assemblers

For quite some time now, Section VIII Division 1 of the ASME Boiler & Pressure Vessel Code has included the following provision in Appendix 2-15: 2-15 QUALIFICATION OF ASSEMBLY PROCEDURES AND ASSEMBLERS. It is recommended that flange joints designed to this Appendix be assembled by qualified procedures and by qualified assemblers. ASME PCC-1 may be used as a guide. The "qualified procedures" reference is to Appendix A of PCC-1-2010 entitled "Notes Regarding Qualifying Flanged Joint Assemblers" and these notes cover slightly less than ½ page, with an Introductory Note stating that a proposed revision to this Appendix was under consideration by the ASME Pressure Technology Post Construction Committee. Well this "consideration" has come to fruition so that the updated Appendix A in the 2013 Edition of PCC-1 will include a replacement 20+ page Appendix A entitled: TRAINING AND QUALIFICATION OF BOLTED JOINT ASSEMBLY PERSONNEL. QUALIFICATION COMPONENTS There are three components outlined...
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11336 Hits
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Pump Trips and Check Valve Closure

Pump Trips and Check Valve Closure
Pump Trips and Check Valve Closure Systems running multiple pumps in parallel can undergo serious equipment and piping damage during a pump trip caused by a power outage or pump mechanical failure. Uncontrolled reverse flow in the system can occur and if improperly selected check valves are used it can result in pumps running backwards or transient pressure spikes in the system, i.e., water hammer. Water hammer will occur if reverse flow occurs prior closure of the check valve and the effect increases with higher reverse flow velocity. Becht has worked with clients on analysis of the design of their systems, e.g., a water treating facility running multiple 52,000 gpm pumps in parallel, a seawater pump station pumping cooling water through a several mile pipeline to an inland facility and a boiler feed water circulation system for a 3000 psig forced circulation boiler. In a three pump system (two operating and...
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3489 Hits
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Pressure Vessel Fitness for Service

Pressure Vessel Fitness for Service
A major oil company revitalizing an Iraqi oil field called on Becht Engineering to review several hundred pressure vessels containing thinned regions to determine their fitness for service (FFS) per the API-579-1/ASME-FFS-1 Part 5 process for analyzing Local Thin Areas (LTAs). Using ultrasonic testing (UT) and visual inspection data, Becht Engineering customized its proprietary API-579-1/ASME-FFS-1 compliant General Metal Loss and Local Thin Area evaluation software to create a program capable of evaluating the maximum allowable working pressure (MAWP) of these pressure vessels in an efficient manner. The software  is very easy to use and presents the results in a user-friendly format for evaluation by engineers and managers. Because of the extensive nature of the corrosion, large files containing UT scan data needed to be evaluated, and the software was enhanced to parse and analyze the LTAs in the large datasets. This highly efficient process allows rapid evaluation of LTAs, and most...
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