Natural Gas Metering and Measurement Inspection Checklist
Accurate gas measurement is critical to custody transfer accuracy and regulatory compliance. This quarterly inspection checklist verifies all elements of gas metering systems per AGA standards and PHMSA measurement requirements.
- Industry: Oil & Gas / Energy
- Frequency: Quarterly
- Estimated Time: 30-45 minutes
- Role: Measurement Technician / Operations Engineer
- Total Items: 31
- Compliance: AGA Report No. 3 - Orifice Metering of Natural Gas, AGA Report No. 7 - Measurement of Gas by Turbine Meters, AGA Report No. 9 - Measurement of Gas by Multipath Ultrasonic Meters, PHMSA 49 CFR Part 192.503 - Natural Gas Measurement Requirements
Primary Meter Condition
Inspect primary meter condition.
- Orifice plate inspected for damage, deposits, edge sharpness per AGA-3?
- Meter tube/run clean with no scale, liquid, or buildup?
- Upstream and downstream straight run lengths per AGA requirements?
- Ultrasonic meter diagnostic outputs within acceptable limits?
- Security seals on meter assembly intact?
Pressure and Temperature Transmitters
Verify PT/TT calibration.
- Static pressure transmitter calibrated within past year?
- Differential pressure transmitter calibrated within past year (orifice)?
- Temperature transmitter or RTD calibrated within past year?
- Calibration records on file with as-found and as-left values?
- Impulse or gauge lines free of blockage and leaks?
Flow Computer and EFM
Verify flow computer accuracy.
- Flow computer configuration parameters matching current meter tube and orifice?
- Flow calculation audit (AGA-3 or AGA-7/9) verified accurate?
- Flow computer clock synchronized to correct time?
- EFM data exported and validated per custody transfer schedule?
- Flow computer security seals intact with no unauthorized access?
Gas Chromatograph / Gas Quality
Verify gas composition measurement.
- Gas chromatograph calibrated with current certified reference gas standard?
- GC calibration response factors within tolerance for all components?
- Heating value calculation current and used in energy measurement?
- Sample conditioning system (heated probe, filter, pressure regulator) operational?
- Spot samples collected per frequency required by contract or regulation?
Measurement Records and Reports
Verify measurement documentation.
- Daily meter readings recorded and compared to EFM?
- Calibration and maintenance log current for meter station?
- Monthly measurement statement prepared and reconciled?
- Any meter out-of-service periods documented with estimated volume?
- Measurement dispute resolution procedure documented?
Security and Access Controls
Verify meter station security.
- Meter station fenced or enclosed with lockable access?
- Access log for meter station current with authorized personnel only?
- All PHMSA measurement seals intact?
- No evidence of tampering with measurement equipment?
- Quarterly measurement inspection report completed?
- Next calibration scheduled for all instruments?
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Why Use This Natural Gas Metering and Measurement Inspection Checklist?
This natural gas metering and measurement inspection checklist helps oil & gas / energy teams maintain compliance and operational excellence. Designed for measurement technician / operations engineer professionals, this checklist covers 31 critical inspection points across 6 sections. Recommended frequency: quarterly.
Ensures compliance with AGA Report No. 3 - Orifice Metering of Natural Gas, AGA Report No. 7 - Measurement of Gas by Turbine Meters, AGA Report No. 9 - Measurement of Gas by Multipath Ultrasonic Meters, PHMSA 49 CFR Part 192.503 - Natural Gas Measurement Requirements. Regulatory-aligned for audit readiness and inspection documentation.
Frequently Asked Questions
What does the Natural Gas Metering and Measurement Inspection Checklist cover?
This checklist covers 31 inspection items across 6 sections: Primary Meter Condition, Pressure and Temperature Transmitters, Flow Computer and EFM, Gas Chromatograph / Gas Quality, Measurement Records and Reports, Security and Access Controls. It is designed for oil & gas / energy operations and compliance.
How often should this checklist be completed?
This checklist should be completed quarterly. Each completion takes approximately 30-45 minutes.
Who should use this Natural Gas Metering and Measurement Inspection Checklist?
This checklist is designed for Measurement Technician / Operations Engineer professionals in the oil & gas / energy industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.
Can I download this checklist as a PDF?
Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.