API MPMS 17.4:1994 pdf download.Manual of Petroleum Measurement Standards Chapter 17—Marine Measurement
17.4.4 Safety and Health Considerations
Due consideration should be given to applicable safety procedures. Safety considerations should include, but are not limited to, potential electrostatic hazards, potential personnel exposure (and associated protective clothing and equipment requirements), and potential explosive and toxic hazards as- sociated with a cargo tankÕs atmosphere among others. The physical characteristics of the cargo and existing operational conditions should be evaluated, and applicable international, federal, state, and local regulations should be observed. Safety procedures designated by the employer, the vessel op- erator, and other concerned parties should also be observed. Internationally, the International Safety Guide for Oil Tankers and Terminals (ISGOTT) and appropriate Oil Com- panies International Marine Forum (OCIMF) and API pub- lications provide additional safety information and should be consulted. See Appendix A. 17.4.5 Quantification Procedures Appendix B provides examples of small volume calcula- tions and configurations. Appendix C provides an example of an OBQ/ROB report form. Appendix D provides an ex- planation and example of the wedge formula; Appendix D also provides a wedge calculation worksheet.17.4.5.1 GAUGING Before taking any OBQ/ROB measurements, record the trim and list of the vessel. The vessel should be requested to eliminate or minimize any list. 17.4.5.1.1 All spaces on board the vessel that could contain OBQ/ROB shall be gauged and quantified prior to loading and after discharge. Gauging shall be performed in accor- dance with procedures outlined in API MPMS Chapter 3 and Chapter 17, Sections 1 and 2. 17.4.5.1.2 Gauging OBQ/ROB at several points in a vessel compartment is very useful to establish whether material is or is not evenly distributed across a tank bottom. When mul- tiple gauging points in a compartment are available, manual gauges from each gauge point should be taken and recorded. 17.4.5.2 TEMPERATURES Temperatures shall be obtained, recorded, and used for cargo volume correction whenever depth of material is suf- ficient and the nature of the material permits. If temperature cannot be measured, the gross observed volume shall be re- ported as gross standard volume (GSV). Temperature measurements shall be obtained in accor- dance with API MPMS Chapter 17, Section 2, and Chapter 7, Sections 1 and 3. Note: Volume correction factors are not applicable to nonliquid volumes (see API MPMS Chapter 3, Section 1A).
API MPMS 17.4:1994 pdf download
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