Home>API standards>API MPMS 17.3 2009 pdf free download

API MPMS 17.3 2009 pdf free download

API MPMS 17.3 2009 pdf free 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. 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. 17.3.2 Scope and Field of Application This chapter recommends the water samples and volumes to be taken, the containers to be used, the care and distribution of the samples, and the analytical procedures for use in identifying the probable source(s) of free water associated with marine petroleum cargoes. This procedure should be considered when significant amounts of free water are detected. This chapter includes the following: a. Basic sampling and on-site testing procedure. b. Basic analytical procedures. C. Appendix A- -Interpretation and Presentation of Results. d. Appendix B- Comprehensive Investigative Program. e. Examples of analysis and report forms. f. The notice that final results should be understood to apply on the specific voyage under consideration. 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 outlined 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. Sampling personnel should be trained in pH determinations. The manufacturer’ s instructions regarding use of testing equipment (medium) must be carefully followed for optimum test results. The on-site pH result should be recorded on the sample identification tag immediately after testing. The procedure for the distribution of samples is as follows. After completion of on-site testing (, appropriate seals ( should be installed. One set of samples should be retained at the point of origin for a minimum of 90 days from date of sampling or as agreed by requesting parties. One set of samples will be delivered for independent testing as soon as possible after sampling. A sample receipt must be completed and signed by each party receiving a sample. See the example of a Chain of Custody Record in Figure 2. In addition to requirements outlined in, a report or letter summarizing the events of the voyage must accompany the samples. Minimum requirements for the report or letter are as follows: a. The loading and discharge ports. b. Dates and times of each event or occurrence. c. Ports of call and lighterings. d. Voyage routes, including seas crossed.

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