1. Equipment Spacing Requirements
Located at least 50 ft from any other building (Control, Office, Warehouse).
Located at least 50 ft from any building or ignition source.
Blowdown and vent stacks located at least 100 ft from compressor building.
Sufficient distance provided to meet 55 dBA noise limit at nearest NSA.
2. ESD & Safety Systems
Minimum of 2 emergency shutdown actuation stations provided (industry best practice).
Located near exit gates/doors, outside gas area, max 500 ft from station limits.
Block and bleed valves located OUTSIDE the compressor building.
System can block gas out of station and blow down piping to safe location.
Gas detection in buildings with ignition sources; alarm at 25% LEL, ESD at 50% LEL (industry practice).
3. Piping & Valves
Class 3 Location design factor (0.50) used for all station piping.
Relief valves sized for full capacity, set at max MAOP + 10% or +4 psi.
Materials verify for -20°F (or lowest ambient) Charpy impact toughness.
Closures equipped with safety interlock to prevent opening under pressure.
4. Environmental (Noise/Air)
Modeled Ldn ≤ 55 dBA at nearest Noise Sensitive Area (NSA).
PTE calculated; Title V triggered if NOx/CO > 100 T/yr (Attainment).
Units meet NSPS/NESHAP limits (e.g., 1.0 g/hp-hr NOx for lean burn engines >500 hp per NSPS JJJJ).
5. Civil & Structural
Perimeter fence adequately grounded to protect personnel.
Emergency vehicle access provided around perimeter of major equipment.
Compressor building has sufficient exits for rapid evacuation.
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