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28 maj 2014 · Frequently, it is called as string test. Many users stipulate full-speed, full-load mechanical running test for compressors in offshore installations, large liquefied natural gas (LNG), re-injection, and ethylene plants.
The ethylene and propane compressors performance was validated during the component testing, and a string test was not required to mitigate the identified risks. A FLFS test for the methane string was required to validate the performance of the LM6000PF in a mechanical drive application.
Unit Test (String Test). This paper aims to discuss the advantages and disadvantages of the various types of tests. The codes from API and ASME do not detail the requirements of full pressure tests. The installation, the procedure, and the acceptance criteria are subject of agreement between vendor and purchaser. Therefore the importance of a
An orifice test is performed in which a manifold is attached to the compressor discharge with an orifice. The compressor is operated for a short period of time (usually 1-2 minutes) with this manifold in place. The compressor must build a minimum pressure requirement against this orifice.
26 maj 2014 · Centrifugal compressors in this service are usually tested with a mixture of helium and nitrogen. Compressors in high molecular weight applications such as wet gas, and chlorine are typically tested with either R134a, or carbon dioxide.
Approximately 280 MW of refrigeration compression will be required to achieve this goal. This paper addresses the design, manufacture, and test campaign of the world’s largest LNG refrigeration compressor strings.
The present paper describes a new methodology to leverage Direct-On-Line Centrifugal Compressor String Test results to improve predictability of on-site pressurized start-up thanks to an enhanced dynamic simulation model.
