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Metallurgy Of Metal Bellows Failures
July 9, 2014The Secret Life of Your Metallurgist Having more fun than you know, but at your expense The disturbing underworld So I accidently wandered into a Metallurgist convention at a hotel where I was staying. It was noisy and they were having an open mic joke hour. “Why couldn’t the metallurgist buy any snacks?”, I heard
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Insider Secrets To Expansion Joint Repair
July 9, 2014Proceed with care I guess I should give the obligatory warning statement about how weld repairing bellows is specialized: it should only be attempted by professionals, don’t run with scissors, yadda, yadda. All true, but we both know end-users will, can, and have weld repaired thin gauge bellows, some with success and some with consequential
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Westinghouse Tap Caps
October 10, 2017Westinghouse Cross-Over Expansion Joint Alert Prevent Manage failure of the inner bellows ply It has already failed; you just don’t know it yet Stop what you are doing right now and go check your Westinghouse steam turbine cross-over expansion joint 2-ply bellows test ports to make sure they are not capped. Go ahead; I’ll wait.
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Why An Expansion Joint Works Part One
August 1, 2014How does a thin bellows hold the same pressure as that of a thicker pipe? The hoop stress pressure of a pipe is derived and then a comparison is made to how it is calculated for a metal bellows. This is the basis for the equation found in both the ASME code and the EJMA
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Why An Expansion Joint Works Part Two
August 1, 2014
Metal Expansion Joint Installation
August 1, 2014
2-Ply Testable Bellows
August 1, 2014Many users such as power plants and refineries have expansion joints with 2-ply testable bellows. These redundant bellows are often overlooked during the piping system inspection. A demonstration is provided with a recommended test fixture for safe and easy testing between the bellows plies. This is a video that is of interest to maintenance engineers
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Steam Extraction Expansion Joints
August 1, 2014There is no excerpt because this is a protected post.
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Understanding Bellows Internal Pressure
July 12, 2014Understanding Bellows Pressure Capacity Simple concepts of convoluted shapes K.I.S.S. – Keep It Simple Moron Ever read a copy of Scientific American? I pretended to once. Too many words, not enough pictures. I can tell you from personal experience that it does not impress girls when you are holding a publication upside down. Give me
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Metal Bellows Cycle Life – EJMA vs ASME
July 12, 2014Will the real cycle life please stand up How can three well-respected codes, or design guides, not even be in the same ballpark when it comes to predicting bellows cycle life? On a recent bellows design the EJMA (Expansion Joint Manufacturers Association) curve gave a 7000 cycle rating; B31.3 gave 1150 cycles; and Section VIII/Appendix
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