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API MPM CH19.3C : 1998

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

MANUAL OF PETROLEUM MEASUREMENT STANDARDS - EVAPORATIVE LOSS MEASUREMENT - WEIGHT LOSS TEST METHOD FOR THE MEASUREMENT OF RIM-SEAL LOSS FACTORS FOR INTERNAL FLOATING-ROOF TANKS
Available format(s)

Hardcopy , PDF

Superseded date

08-08-2019

Language(s)

English

Published date

01-01-2012

0 INTRODUCTION
1 SCOPE
2 NORMATIVE REFERENCES
2.1 API normative standards
2.2 ASTM normative standards
3 TERMINOLOGY
3.1 Definitions
3.2 Units of measurement
3.3 Nomenclature
4 SUMMARY OF TEST METHOD
5 SIGNIFICANCE AND USE
6 LIMITATIONS TO TEST METHOD
6.1 Evaluation of results
6.2 Low loss rates
7 TEST APPARATUS
7.1 Test apparatus schematic
7.2 Test room
7.3 Test assembly
7.4 Data acquisition room
8 TEST ITEM
8.1 Test item construction
8.2 Test rim seal attachment
8.3 Test rim seal end connections
9 PREPARATION OF APPARATUS
9.1 Test assembly placement
9.2 Test room air temperature control
9.3 Data acquisition room air temperature control
9.4 Steady state operation
10 INSTRUMENT AND CALIBRATION
10.1 Accuracy
10.2 Data acquisition system
10.3 Weight measurement
10.4 Temperature measurement
10.5 Voltage measurement
10.6 Atmospheric pressure measurement
11 TEST PROCEDURE
11.1 Rim-seal gaps
11.2 Data to be recorded
11.3 Duration of test
12 CALCULATION OF TEST RESULTS
12.1 Calibration corrections
12.2 Rim-seal loss rate
12.3 Vapor pressure function
12.4 Rim-seal loss factor
12.5 Uncertainty analysis
13 REPORT OF TEST RESULTS
13.1 Report
13.2 Loss rate curve
14 PRECISION AND BIAS
APPENDIX A LOSS RATE DETERMINATION
APPENDIX B UNCERTAINTY ANALYSIS
APPENDIX C METRIC UNITS
APPENDIX D BIBLIOGRAPHY
Figures
1 Plan view of a typical weight loss test facility
2 Elevation view of a typical weight loss test facility
3 Test assembly
4 Typical loss rate curve
A-1 Measured anc calculated weight loss versus time
A-2 Corrected and correlated weight loss versus time
Tables
1 Description of the symbols and units
2 Instrument requirements
A-1 Nomenclature for Appendix A
B-1 Nomenclature for Appendix B
B-2 Summary of example uncertainty analysis results

Used to establish evaporative rim-seal loss factors for rim seals for use on internal floating-roof tanks. The methods of test involve measuring the weight loss of a test assembly over time. It gives the test apparatus, the instruments, the test method and the calculation procedures to be used. The variables that are to be measured are defined, and quality provisions are stipulated. The format for reporting the values of both the test results and their associated uncertainty are also specified. This standard may involve hazardous materials , operations, and equipment.

DocumentType
Standard
Pages
36
ProductNote
Reconfirmed 1998
PublisherName
American Petroleum Institute
Status
Superseded
SupersededBy

ASTM E 230 : 2003 Standard Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples
API MPM CH19.3G : 1997 MANUAL OF PETROLEUM MEASUREMENT STANDARDS - EVAPORATIVE LOSS MEASUREMENT - CERTIFIED LOSS FACTOR TESTING LABORATORY REGISTRATION
API MPM CH19.2 : 2012 MANUAL OF PETROLEUM MEASUREMENT STANDARDS - CHAPTER 19.2: EVAPORATIVE LOSS FROM FLOATING-ROOF TANKS
API 2519 : 3ED 83(R1996) EVAPORATION LOSS FROM INTERNAL FLOATING-ROOF TANKS
ASTM E 220 : 2013 : REDLINE Standard Test Method for Calibration of Thermocouples By Comparison Techniques

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