API MPMS 17.1-2008 pdf free download

API MPMS 17.1-2008 pdf free download.Manual of Petroleum Measurement Standards Chapter 17—Marine Measurement Section 1—Guidelines for Marine Cargo Inspection.
3.40 water cut measurement The procedure for locating the oil/water interface for the purpose of determining the volume of FW in a shore tank or vessel compartment. It is also used to refer to the line of demarcation of the oil/water interface. 3.41 wedge formula A mathematical means to approximate small quantities of liquid and solid cargo and FW on board prior to loading and after discharge, based on cargo compartment dimensions and vessel trim. The wedge formula is to be used only when the liquid does not touch all the bulkheads of the vessel’s tank. 3.42 wedge table A pre-calculated vessel table based on the wedge principle and displayed much like the vessel’s usual innage/ullage tables. These tables, however, are for small quantities (OBQ, ROB) when the cargo or FW does not touch all the bulkheads of the vessel’s tank. 3.43 wipe test The procedure of physically wiping random interior areas and steam coils of the vessel’s tanks with absorbent white rags. This procedure is used to test the tank’s coating for possible color contamination. 4 Recommended Documentation These guidelines provide for collecting data in a uniform manner. It is required that the data collected be recorded in a permanent record, at the time when the procedures are being performed. The data thus gathered should then be reported in a clear, understandable format, as illustrated in the sample forms presented in Annex A of this chapter. 5 General Information Gauging may be performed manually or by automatic systems, in accordance with procedures appropriate to the type of vessel, cargo and location (see API MPMS Ch. 3 and API MPMS Ch. 17.2). All responsible parties should be informed if any of the gauging equipment or tank or meter facilities have a known bias. Documentation of these deviations should be available for inspection by all responsible parties and must be used in preparing volume reconciliation.
The procedures described in this publication should be performed by properly trained personnel. If the procedures cannot be performed for any reason (such as safety, environmental, or physical constraints; governmental restrictions; conflicts with contractual agreements; or other problems), the inspection report should include a complete, detailed explanation. Measurement personnel are responsible for ensuring the use of proper safety, measurement, and sampling equipment. The vessel’s master and/or designated representative, the shore supervisory personnel and the measurement personnel conducting the inspection should be familiar with the scope of the cargo inspection procedures and aware of the safety procedures unique to the product being transferred. If simultaneous ballasting or deballasting must be performed during cargo operations, record this fact and the reasons for it in the inspection report and comment on the degree of segregation that was maintained during the operation. Petroleum products and chemicals require stringent quality control during loading, transport and discharge operations. Vessels designated to carry these products should meet compatibility criteria. They should also be inspected for cleanliness prior to loading so that the shipment will not be contaminated (see API MPMS Ch. 17.8).
6 Safety and Health Considerations 6.1 General Due consideration must always be given to applicable safety and health procedures. Considerations should include, but are not limited to, possible electrostatic hazards (see API 2003) and other fire and explosion hazards, potential dangers to personnel (e.g., exposure limits, hazard communication, training, and various protective clothing and equipment requirements and work practices), and potential explosive and toxic hazards associated with a cargo tank’s environment. The physical characteristics of the cargo and existing operational conditions should be evaluated carefully, and applicable international, federal, state, and local regulations should be strictly observed. Safety procedures designated by the employer, the vessel’s operator, and other concerned parties also must be observed. The International Safety Guide for Oil Tankers and Terminals and appropriate Oil Companies International Marine Forum (OCIMF), International Maritime Organization (IMO) and API publications should be consulted for additional safety information.