API MPMS 17.3 2009 pdf download

API MPMS 17.3 2009 pdf download

API MPMS 17.3 2009 pdf download.Manual of Petroleum Measurement Standards Chapter 17—Marine Measurement Section 3—Guidelines for Identification of the Source of Free Waters Associated with Marine Petroleum Cargo Movements. SAMPLING CONTAINERS Sampling containers should be clean, one quart or one liter containers made of glass or high-density polyethylene. IDENTIFICATION LABELS OR TAGS Labels or tags should contain information listedin and must be able to be securely affixed to sample containers. See Figure 1 for sample label. IDENTIFICATION SEALS Identification seals should be of the single use type with unique number codes. ADDITIONAL EQUIPMENT A portable pH meter is the preferred equipment for deter- mination of pH of samples on site. The pH test papers may be used when water samples are clear enough to yield ac- curate readings. 17.3.5 Measurement and Sampling of Free Water Measuring and sampling are done in accordance with the procedures and equipment outined in Chapters 3, 8, 17.1, and 17.2. Free water can be measured and sampled during cargo inspection or at any other time during the cargo movement. 17.3.6 Basic Sampling and On-Site Testing Procedure Detection and measurement of free water are performed as described in 17.3.5. A ltter of protest may be issued to the appropriate parties for any free water found in cargo tanks prior to or after loading or prior to discharge per Chapter 17.1,“Guidelines.” The procedure for sampling the free water is described in 17.3.5. Samples of free water should be taken when the free water level in any compartment is within the capabilities of the appropriate sampling equipment. When the free water level in any compartment exceeds 1 foot (30 centimeters), additional spot samples shall be taken at a minimum of 1-foot increments. The first sample should be taken near the oil-water interface, each subsequent sample from the next increment downward, and the final sample from the bottom of the compartment. This procedure minimizes any disturbance of the free water. The procedure for the Report of Sampling is as follows. A Report of Sampling will be issued to all interested parties. The Report of Sampling should outine the source of each sample, date of sampling, method and equipment used, name of sampling party, seal identification, field pH test result, and distribution of samples. The Report of Sampling should also specify any elements of this guideline that could not be followed. 17.3.7 Basic Analytical Procedures Methods for performing analytical testing are referenced in API Recommended Practice 45. Minimum tests to be performed for each sample subnmitted to the laboratory are listed in Table 1. The procedure for the presentation of analytical data is as follows. Results of all laboratory testing will be presented to interested parties in a report of analysis issued by the testing laboratory for each sample submitted, following instructions and format in Appendix A.2 and A.3. Any comments, including analytical anomalies, will be expressed on each report.
17.3.1 Introduction The presence of free water is a factor in marine custody transfers of bulk petroleum, especially in the case of crude oil cargoes. The source and type of water contamination encountered can be identified if proper sampling and testing procedures are followed. Depending on the type of loading involved (ie, shoreside-to-vessel, offshore buoy, or vessel-to-vessel) water contamination can involve produced formation waters, export-processing wash water, sea-line leakage, ballast water within the vessel, or ballast water from a lightering vessel. In addition, the party receiving the cargo at discharge may also encounter waters that entered the vessel during its voyage. This chapter outlines recommended water-sampling locations and testing procedures to determine the most probable source(s) of free water volumes that occur in custody transfer.

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