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API SPEC 7B-11C 9th Edition, November 1, 1994
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Specification for Internal- Combustion Reciprocating Engines for Oil-Field Service
Includes all amendments and changes through Reaffirmation Notice , April 2008
Additional Comments: G03409 * W/D NO S/S
Page Count:20
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This specification covers internal-combustion reciprocating engines for oil-field service, including methods of testing and rating for application to specific oilfield duties.

The methods of test stipulated herein are intended to afford the purchaser a uniform basis for comparing similar equipment with respect to capacity, energy requirements, and recommended speed range. Since maintenance and durability factors have not been included in the test procedure, it is assumed that comparisons between engines will be made advisedly. The ratings for bare eingines are intended for use only in cases where engines are supplied without cooling systems.