“Speed Kills” – An Empirical Association of Antifriction Bearing Behavior When Things Go From Bad to Worse

Machinery and reliability people have for a long time observed that when it comes to long life and high reliability, operating at higher speeds compares poorly to operation at lower speeds. One of the primary reasons for having high-speed devices is economics. With high speed you can have smaller equipment sizes with fewer stages. While […]

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Shaft Fatigue Failures – Part II

Note:  This blog is a continuation from the previous article from Becht Engineering, “Shaft Fatigue Failures – Part I”.  It is suggested that the reader review “Shaft Fatigue Failures – Part I” before proceeding with this article.  Click Here to view Part I. Before getting into the calculation methods, first a quick refresher on high […]

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Process Centrifugal Compressor Oil Seals

Ingersoll Rand Cone Oil Seals Compressor process shaft end seals are designed to seal the rotating assembly in the stationary compressor case to prevent the process gas in the compressor from escaping to the atmosphere and to prevent the atmosphere from getting into the process gas.   Shaft end oil seals, as compared to the relatively […]

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Reciprocating Compressor Cylinder Alignment (Often overlooked as a failure root-cause)

Compressor cylinder bore misalignment can cause failures that are often not attributed to misalignment. Crosshead shoes uneven wear, compressor piston rod failure at both the crosshead and at the piston, compressor piston rod coating failure, piston wear and compressor cylinder bore wear can all be attributed to cylinder misalignment. The objective of this article is […]

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No Detail or Procedure is Trivial, or, Sophisticated Vibration Analysis is a VERY Cost Effective Diagnostic Tool

Today it is common practice in overhauls of large rotating equipment to spend many man hours in detailed planning, coordination, writing procedures, reviewing documentation, reviewing past photos, procuring and inspecting spare parts etc. We also review our past experience and put steps in place to mitigate past problems or errors.   Now that we have a […]

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Oil System Cleaning – Making Oil Flushing a Predictable Procedure

Oil system cleaning or Oil Flush has humbled many Machinery Guys. What seems like a very simple task often turns out to be to the Achilles’ heel and often unpredicted and embarrassing critical path of the machinery overhaul. The purpose of this article is to outline improvements that we have implemented to the old-fashion “Flush […]

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Machinery Hurricane Flood Damage– Innovative Seal Recovery Procedure

Serious floods rarely occur in the life of a refinery or petro-chemical plant. But when such an event does occur there are significant implications for the reliability of rotating equipment and associated business risks when it’s time to restart the plant. And because this scenario is so uncommon, there are few, if any, industry standards […]

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The Potential Pitfalls of Fabricated Machinery Foundations

A new process unit was designed and built by a petrochemical manufacturer. As part of the project, two 50 horespower blowers were installed. Rotating equipment of this type is traditionally installed at grade on an engineered monolithic concrete foundation with rebar and anchor bolts. A suitable soleplate or baseplate is then grouted to the foundation […]

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