Permitting & Compliance

Facility Design Compliance Checklist

A comprehensive "Go/No-Go" audit tool for compressor station design. Verify compliance with DOT 49 CFR 192, FERC noise limits, and industry best practices for spacing, safety, and operations.

Spacing Calculator

1. Equipment Spacing Requirements

Compressor Building Separation

Located at least 50 ft from any other building (Control, Office, Warehouse).

Design Practice 3.1.8
Condensate Tank Distances

Located at least 50 ft from any building or ignition source.

Design Practice 3.1.8
Vent Discharge Location

Blowdown and vent stacks located at least 100 ft from compressor building.

Design Practice 3.2.3.2
Property Line Setback

Sufficient distance provided to meet 55 dBA noise limit at nearest NSA.

FERC/Practice 1.1

2. ESD & Safety Systems

ESD Station Quantity

Minimum of 2 emergency shutdown actuation stations provided (industry best practice).

Industry Practice
ESD Station Placement

Located near exit gates/doors, outside gas area, max 500 ft from station limits.

Design Practice 3.2.1
Fuel Gas Shutdown

Block and bleed valves located OUTSIDE the compressor building.

Design Practice 3.2.2
Blowdown Capability

System can block gas out of station and blow down piping to safe location.

Design Practice 3.2.3.1
Gas Detection (Buildings)

Gas detection in buildings with ignition sources; alarm at 25% LEL, ESD at 50% LEL (industry practice).

CFR 192.171 / Practice

3. Piping & Valves

Design Factor (Station Piping)

Class 3 Location design factor (0.50) used for all station piping.

CFR 192.111
Overpressure Protection

Relief valves sized for full capacity, set at max MAOP + 10% or +4 psi.

CFR 192.201
Material Selection

Materials verify for -20°F (or lowest ambient) Charpy impact toughness.

Practice 4000
Pig Trap Closures

Closures equipped with safety interlock to prevent opening under pressure.

ASME B31.8

4. Environmental (Noise/Air)

Noise Limit Verification

Modeled Ldn ≤ 55 dBA at nearest Noise Sensitive Area (NSA).

FERC 1.1
Air Permit Threshold

PTE calculated; Title V triggered if NOx/CO > 100 T/yr (Attainment).

Practice 2.6
Engine Emissions

Units meet NSPS/NESHAP limits (e.g., 1.0 g/hp-hr NOx for lean burn engines >500 hp per NSPS JJJJ).

40 CFR 60 Subpart JJJJ

5. Civil & Structural

Fence Grounding

Perimeter fence adequately grounded to protect personnel.

Practice 1.3.4
Road Access

Emergency vehicle access provided around perimeter of major equipment.

Practice 3.1.2
Building Exits

Compressor building has sufficient exits for rapid evacuation.

NFPA 101