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Centrifugal Compressors

Centrifugal Compressors – Horsepower and Efficiency Estimates

Posted on June 23, 2019 by dan

One of the major benefits in doing your own estimates, rather than turning everything over to a manufacturer, is that you develop a better understanding…

Centrifugal Compressors

Centrifugal Compressor Full-load, Full-pressure, Full-speed Test

Posted on April 29, 2018 by dan

A full-load, full-pressure, full-speed (FLFPFS) test is often called for when the compressor train is in gas injection service or other services where the discharge…

Centrifugal Compressors

Centrifugal Compressor Complete-Unit Test

Posted on April 29, 2018 by dan

The complete-unit test is also called a “String” test. It consists of coupling up all the components and auxiliaries of a compressor train, and running…

Centrifugal Compressors

Centrifugal Compressor Class III Tests Performance Test

Posted on April 29, 2018 by dan

This test is the same as Class II except that compressibility factors are applied along with changes in “k” value from suction to discharge. In…

Centrifugal Compressors

Centrifugal Compressor Class II Tests Performance Test

Posted on April 29, 2018 by dan

The test gas is different than the specified gas, and in the reduction of test data it is assumed that the test gas and the…

Centrifugal Compressors

Centrifugal Compressor Class I Tests Performance Test

Posted on April 29, 2018 by dan

The test gas used is the same as the actual gas specified. The pressures are essentially the same as those specified. In general, this class…

Centrifugal Compressors

Centrifugal Compressor Performance Test

Posted on April 29, 2018 by dan

The aerodynamic performance of a stage, of a section, or of a complete casing can be evaluated with an optional test using the procedures covered…

Centrifugal Compressors

Assembled Centrifugal Compressor Gas Leakage Test

Posted on April 29, 2018 by dan

This test comes after the four-hour spin test, and is conducted at maximum seal design pressure (usually settling-out pressure) at zero speed with the seal…

Centrifugal Compressors

Centrifugal Compressor Four-Hour Mechanical Test

Posted on April 29, 2018 by dan

The four-hour mechanical spin test is a standard test for most vendors. It is also specified in API 617 and in Company Specification CMP-MS-1876. The…

Centrifugal Compressors

Centrifugal Compressor Inspections

Posted on April 29, 2018 by dan

The principal inspection points are listed below in the normal manufacturing sequence. The cost of testing is usually added to the purchase cost in a…

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