API STD 2350-2020 pdf download

API STD 2350-2020 pdf download.Overfill Prevention for Storage Tanks in Petroleum Facilities.
3.1.9 capacity The volume (amount) of product contained in a tank at designated levels [i.e. the levels of concern (LOCs)]. 3.1.10 Class I liquid As defined in NFPA 30, i.e. a liquid that has a flash point below 100 °F (37.8 °C). 3.1.11 Class II liquid As defined in NFPA 30, i.e. any liquid that has a flash point at or above 100 °F (37.8 °C) and below 140 °F (60 °C). 3.1.12 competent person An individual who is trained, capable, and able to perform the assigned duties as determined by the owner/operator. 3.1.13 continuous level sensor A mechanical or electronic level sensor designed to measure the liquid level in a storage tank without personnel action. 3.1.14 control center Locally or remotely manned operating center that can monitor, control, and terminate operations at the subject facility. 3.1.15 Critical High (CH) level The highest level in the tank that product can reach without detrimental impacts (i.e. product overflow or tank damage). 3.1.16 dedicated relief tank A tank that does not store product on a normal basis, but is used to hold product during pipeline pressure relief events. 3.1.17 diagnostic alarm Indication that there has been a malfunction of equipment. It applies to any condition affecting the proper operation of instrumentation, control, or alarm systems (including power outages) that requires operating personnel response. 3.1.18 electrically supervised OPS instrumentation that is electronically self-checking to indicate when communication between the sensor, logic solver, or final element has failed and can generate a diagnostic alarm.
3.1.22 High-High (HH) tank level A level sufficiently below the Critical High (CH) level to enable termination of a receipt or transfer before the Critical High (CH) level is reached. 3.1.23 incident An event with undesirable consequences affecting safety, health, the environment, or financial impact to the facility. 3.1.24 independent alarm An alarm function separate from the device or system used for routine operational tank level measurement. 3.1.25 level of concern (LOC) Calculated product level in a tank that allows the owner/operator to determine appropriate levels to set alerts, alarms, or AOPS functions. 3.1.26 local Located or operated on-site at a facility. 3.1.27 manual overfill prevention system (MOPS) An overfill prevention system requiring operating personnel to terminate receipt. 3.1.28 marine vessel A barge or tanker ship that can deliver product directly into petroleum facility tanks (usually through temporary connections to facility pipelines). 3.1.29 maximum fill rate (in./hr) The rate of liquid level rise in the tank at the maximum flow rate, excluding outflow from the tank. 3.1.30 maximum flow rate (bbl/hr) The highest volumetric rate at which product can enter a tank at the same time from various sources. 3.1.31 maximum working level An operational level that is the highest product level to which the tank is routinely filled during normal operations. 3.1.32 monitored The observation of tank levels, alarms, flow rates, etc. during a receipt or transfer activity. The term describing the type of tank gauging and degree of observation of tank operations. The activity of monitoring can be local or remote.
3.1.33 operating personnel The person who manages tank receipt or dispatch operations; whether located at a facility, local or remote control center, operating personnel are available, have access to equipment and controls, and are competent to respond to notifications, alerts, alarms, and abnormal conditions pertaining to receipt operations at a facility. 3.1.34 overfill Any product level that exceeds the critical high (CH) level. 3.1.35 overfill prevention system (OPS) An engineered system consisting of the physical equipment and procedures to ensure that safeguards directed at effectively receiving products and minimizing the potential for tank overfills are incorporated. 3.1.36 owner/operator The company that owns and/or operates the facility. 3.1.37 parallel tanks Two or more tanks at the same facility that can be filled simultaneously and effectively operated as one tank. 3.1.38 person in charge (PIC) A U.S. Coast Guard regulatory term from 33 CFR 154.700 for a trained and experienced individual designated as a “person in charge” of transfer operations at marine terminals. 3.1.39 product Class I or Class II liquids as defined by NFPA 30. 3.1.40 proof testing A partial or complete overfill prevention system instrumentation loop test through the primary sensing element verifying appropriate response from sensors to the final control element, including alarms to the extent possible.