API 343 : 1998

FUGITIVE EMISSIONS FROM EQUIPMENT LEAKS 2: CALCULATION PROCEDURES FOR PETROLEUM INDUSTRY FACILITIES

American Petroleum Institute

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1.0 Introduction
2.0 Equipment Description
      2.1 Equipment Types
            2.1.1 Agitators
            2.1.2 Compressors
            2.1.3 Connectors
            2.1.4 Open-ended Lines
            2.1.5 Pressure Relief Devices
            2.1.6 Pumps
            2.1.7 Sampling Connections
            2.1.8 Valves
            2.1.9 Others
      2.2 Counting Components
            2.2.1 Agitators
            2.2.2 Compressors
            2.2.3 Connectors
            2.2.4 Open-ended Lines
            2.2.5 Pressure Relief Devices
            2.2.6 Pump Seals
            2.2.7 Sampling Connections
            2.2.8 Valves
            2.2.9 Others
SECTION 3.0 Emission Estimation Methods
      3.1 Average Emission Factor Method
            3.1.1 Reduction Factors
            3.1.2 Adjustment for Inorganics
            3.1.3 Adjustment for Non-VOC Organic Compounds
            3.1.4 Adjustment for Methane at Refineries for Total
                   Organic Compounds
            3.1.5 Sample Calculation Using Average Emission Factor
                   Method
      3.2 Screening Ranges Method
            3.2.1 Sample Calculations Using Screeeing Ranges Method
            3.2.2 Sample Calculations Applying Non-VOC Organic
                   Compounds and Methane Adjustment to Screening Ranges
                   Method
      3.3 Emission Correlation Equation Method
            3.3.1 Sample Calculation Using Emission Correlation Equation
                   Method
      3.4 Emission Estimation Methods for Petrochemical Facilities
      3.5 Estimating Equipment Leak Emissions of Inorganic Compounds
SECTION 4.0 Issues Affecting Determination of Emissions
      4.1 Size of a Component
      4.2 Use of Background Hydrocarbon Levels
      4.3 Use of Response Factors
      4.4 Analyzer Correction Factors
      4.5 Length of Time to Consider a Component Leaking
            4.5.1 Immediately After Last Monitoring
            4.5.2 Immediately Prior to Most Recent Monitoring
            4.5.3 Average Between Monitorings
            4.5.4 Prior to Any Monitoring
      4.6 Emission Factors for New Emission Sources
      4.7 Stream Speciation
      4.8 Calculating Emissions from Inaccessible and Difficult-to-
            Monitor Components
      4.9 Impact of Temperature and Pressure on Emissions
      5.0 Data Management
      6.0 References
Appendix A: Component Count Estimation Methods for Refinery Units
Appendix B: Method to Account for Benefits of an Inspection/Maintenance
             Program for Fugitive Emissions
Appendix C: SOCMI Fugitive Emission Factors and Equations
Appendix D: Response Factors
Appendix E: Response Factor Calculation Example
List of Figures
2-1 Threaded Connector Elbow
2-2 Ball Valve with Side Flanges
4-1 Example of Options for Length of Time to Consider a Component
     Leaking

Abstract

Covers emission calculations associated with fugitive emissions. Providing an overview of emission estimation approaches, it also includes sample calculations for various calculation methods.