Maintenance & Reliability
HP Reliability: Improve selecting valve unloaders for reciprocating compressors
In a recent investigation of serious compressor distress, it was alleged that finger-type unloaders had undergone 600 actuations per day. Since the service was corrosive and less-than-clean, the unloa..
HP Reliability: Compressor valve breakage: what are the options?
Reciprocating compressors may experience valve failures. Excessive breakage, especially at startup, has left a bad impression on many responsible people. Installation dirt, liquid, and off-design temp..
HP Reliability: Improve reliability through shot peening
Whenever component distress is causing equipment failure, the analyst should remember that the life expectancy of replacement components can be improved by shot peening. Shot peening process. It is..
HP Reliability: What is reliability?
Since reliability is a trendy term, which is used by the both the weakest and strongest players in the HPI, it is prudent to occasionally remind ourselves of the meaning of this word. Reliability is..
HP Reliability: Detect accelerated wear in compressors
For compressor pistons, rings, liners, packing and rods, normal wear is not a significant problem. Generally, their normal service life is long and satisfactory; typical wear is gradual and can be det..
HP Reliability: Maintainability – What are the options?
Many optimally designed process machines require minimal maintenance. However, if maintenance is necessary and it cannot be easy, then at least it should be possible. What should maintenance engineers..
Revise storage tank inspections
Recent changes in API standards affect mechanical integrity evaluations of atmospheric storage tanks
HP Reliability: Spectrum, FFT and cepstrum analyses pinpoint machinery distress
Familiarity with diagnostic techniques such as FFT spectrum analysis, cepstrum analysis and amplitude demodulation is vital when effectively diagnosing particular performance flaws in rotating machine..
Control corrosion in washwater systems
When operating reactor wash units above design conditions residual salts can cause equipment failures
HP Reliability: Lubrication – not an afterthought
This new thinking supersedes the old notion that lubrication automation is difficult to cost-justify or that auto-lubrication provisions can be retrofitted as needed. In a highly cost-competitive envi..
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