Significance and Use
4.1 Representative samples of petroleum and petroleum products are required for the determination of chemical and physical properties, which are used to establish standard volumes, prices, and compliance with commercial terms and regulatory requirements. This practice does not cover sampling of electrical insulating oils and hydraulic fluids. This practice does not address how to sample crude at temperatures below the freezing point of water.
PART I—General
This part is applicable to all petroleum liquid sampling whether it be crude oil or refined products. Review this section before designing or installing any automatic sampling system.
Scope
1.1 This practice describes general procedures and equipment for automatically obtaining samples of liquid petroleum and petroleum products, crude oils, and intermediate products from the sample point into the primary container. This practice also provides additional specific information about sample container selection, preparation, and sample handling. If sampling is for the precise determination of volatility, use Practice D5842 (API MPMS Chapter 8.4) in conjunction with this practice. For sample mixing and handling, refer to Practice D5854 (API MPMS Chapter 8.3). This practice does not cover sampling of electrical insulating oils and hydraulic fluids.
1.2 Table of Contents:
|
| Section |
| INTRODUCTION |
|
| Scope | 1 |
| Referenced Documents | 2 |
| Terminology | 3 |
| Significance and Use | 4 |
| PART I–GENERAL |
|
| Representative Sampling Components | 5 |
| Design Criteria | 6 |
| Automatic Sampling Systems | 7 |
| Sampling Location | 8 |
| Mixing of the Flowing Stream | 9 |
| Proportionality | 10 |
| Sample Extractor Grab Volume | 11 |
| Containers | 12 |
| Sample Handling and Mixing | 13 |
| Control Systems | 14 |
| Sample System Security | 15 |
| System Proving (Performance Acceptance Tests) | 16 |
| Performance Monitoring | 17 |
| PART II–CRUDE OIL |
|
| Crude Oil | 18 |
| PART III–REFINED PRODUCTS |
|
| Refined Products | 19 |
| KEYWORDS |
|
| Keywords | 20 |
| ANNEXES |
|
| Calculations of the Margin of Error based on Number of Sample Grabs | Annex A1 |
| Theoretical Calculations for Selecting the Sampler Probe Location | Annex A2 |
| Performance Criteria for Portable Sampling Units | Annex A3 |
| Profile Performance Test | Annex A4 |
| Sampler Acceptance Test Data | Annex A5 |
| APPENDIXES |
|
| Design Data Sheet for Automatic Sampling System | Appendix X1 |
| Comparisons of Percent Sediment and Water versus Unloading Time Period | Appendix X2 |
1.3 Units—The values stated in either SI units or US Customary (USC) units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Except where there is no direct SI equivalent, such as for National Pipe Threads/diameters, or tubing.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
