API 680 : 1ED 87

Section 1 - General
1.1 Scope
1.2 Alternative designs
1.3 Conflicting requirements
1.4 Definition of terms
1.5 Referenced publications
Section 2 - Basic design
2.1 General
2.2 Allowable speeds
2.3 Discharge temperature
2.4 Rod loading
2.5 Dynamics
2.6 Compressor cylinders
2.6.1 General
2.6.2 Cylinder connections
2.7 Valves
2.8 Pistons and piston rods
2.9 Crankshafts, bearings, and crossheads
2.10 Distance pieces
2.11 Stuffing boxes and packing
2.12 Compressor frame lubrication
2.13 Cylinder and packing lubrication
2.14 Materials
2.14.1 General
2.14.2 Castings
2.14.3 Forgings
2.14.4 Welding
2.14.5 Low temperature
2.14.6 Material inspection
2.15 Nameplates and rotation arrows
Section 3 - Accessories
3.1 Drivers
3.2 Couplings and guards
3.2.1 General
3.2.2 Guards for flexible-disk high-speed couplings
3.3 Reduction gears
3.4 Belt drives
3.5 Baseplates
3.6 Controls and instrumentation
3.6.1 General
3.6.2 Capacity control system
3.6.3 Control station
3.6.4 Instrumentation
3.6.5 Alarms and shutdowns
3.6.6 Annunciator
3.6.7 Electrical systems
3.7 Piping appurtenances
3.7.1 General
3.7.2 Frame lubricating oil piping requirements
3.7.3 Forced-feed lubrication tubing
3.7.4 Instrument piping
3.7.5 Coolant piping
3.8 Intercoolers and aftercoolers
3.9 Air intake filters
3.10 Pulsation controls
3.11 Air receivers
3.12 Special tools
Section 4 - Inspection, testing, and preparation for
            shipment
4.1 General
4.2 Inspection
4.2.1 General
4.2.2 Material inspection
4.2.3 Mechanical inspection
4.3 Testing
4.3.1 General
4.3.2 Hydrostatic test
4.3.3 Mechanical running test
4.3.4 Optional tests
4.4 Preparation for shipment
Section 5 - Vendor's data
5.1 Proposals
5.2 Contract data
5.2.1 General
5.2.2 Coordination meeting
5.2.3 Drawings
5.2.4 Data
5.2.5 Progress reports
Appendix A - Typical data sheets
Appendix B - Cylinder cooling systems
Appendix C - Material specifications for major component
             parts
Appendix D - Repairs to gray or nodular iron castings
Appendix E - Typical air and water piping schematics for
             compressors
Appendix F - Sizing air receivers
Appendix G - Reciprocating plant and instrument air
             compressor vendor drawing and data
             requirements
Tables
1 Minimum piping schedule
2 Minimum tubing wall thickness
3 Minimum tubing wall thickness for instrument and
     control air
4 Maximum peak-to-peak pressure levels
C-1 Material specifications for major component parts
F-1 Air receiver volume as a function of air compressor
     capacity
Figures
1 Distance piece and packing arrangement
B-1 Cylinder cooling system
B-2 Jacket water coolant console schematic
E-1 Typical piping schematics for single stage
     compressors
E-2 Typical piping schematics for two stage compressors

Outlines minimum requirements for double-acting reciprocating compressors of 600 brake horse power (448 kW) and below with lubricated or non-lubricated cylinders in utility air and/or instrument air service up to 125 pounds per square inch gage (8.6 bar). Driver, related lubricating systems, controls, instrumentation, intercooler, aftercooler, receiver and other auxiliary equipment also covered. The compressor will generally be spared.