API Spec 11P PDF

This standard covers the minimum requirements for a packager supplied, designed and fabricated, skid-mounted, reciprocating, separable or integral compressor with lubricated cylinders and its prime movers used in oil and gas production services. It also includes all necessary auxiliary equipment such as water and gas coolers, exhaust silencer, emission control equipment, inlet air filter, scrubbers, control panel, piping, etc. Required to install an operable unit in compliance with the purchase specifications and with a minimum of filed construction and field purchased equipment.

Compressors intended for refinery, chemical or petro-chemical services as covered in API 618 - Reciprocating Compressors for General Refinery Services, compressors that are block-mounted, compressors that are non-lubricated, compressors with single-acting, trunk-type (automotive-type) pistons that also serve as crossheads, and either utility or instrument air compressors that discharge at 125 pounds per square inch (PSIG) or below are specifically excluded from this specification. Diesel engine, gas turbine and steam turbine prime movers are also specifically excluded.