Vented Cell

Vented Cell

Definition(s)

Vented Cell

secondary cell having a cover provided with an opening through which products of electrolysis and evaporation are allowed to escape freely from the cell to the atmosphere [SOURCE: IEC 60050-482:2004, 482.05.14] Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Valve Regulated Lead Acid Battery

Valve Regulated Lead Acid Battery

Definition(s)

Valve Regulated Lead Acid Battery

secondary battery in which cells are closed but have a valve which allows the escape of gas if the internal pressure exceeds a predetermined value Note 1 to entry: The cell or battery cannot normally receive addition to the electrolyte. Note 2 to entry: This note applies to the French language only. [SOURCE IEC 60050-482:2004, 482.05.15]. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
VRLA

VRLA

Definition(s)

VRLA

valve regulated lead acid battery Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
System Component

System Component

Definition(s)

System Component

part used within the system as cable tray length or cable ladder length, cable tray fitting or cable ladder fitting, support device, mounting device and system accessory Note 1 to entry: System components may not necessarily be included together in a system. Different combinations of system components may be used. [SOURCE: IEC 61537:2006, 3.2]. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Support Device

Support Device

Definition(s)

Support Device

system component designed to provide mechanical support and which may limit movement of a cable runway [SOURCE: IEC 61537:2006, 3.7]. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Sealed Cell

Sealed Cell

Definition(s)

Sealed Cell

cell which remains closed and does not release either gas or liquid when operated within the limits specified by the manufacturer Note 1 to entry: A sealed cell may be equipped with a safety device to prevent a dangerously high internal pressure and is designed to operate during its life in its original sealed state. [SOURCE IEC 60050-482:2004: 482.05.17) Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Extra-low Voltage

Extra-low Voltage

Definition(s)

Extra-low Voltage

voltage which does not exceed 50 V AC r.m.s. between conductors, or between any conductor and earth Note 1 to entry: The voltage limit should not be exceeded, either at full load or no load, but it is assumed, for the purpose of this definition, that any transformer or converter is operated at its rated supply voltage. Note 2 to entry: Information about protection by extra-low voltage is given in IEC 60364-4-41. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
ELV

ELV

Definition(s)

ELV

extra-low voltage. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Surface Heating

Surface Heating

Definition(s)

Surface Heating

heat generated in the surface layer of a body to be heated by electrical means in order to raise or maintain its temperature. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Trace Heating

Trace Heating

Definition(s)

Trace Heating

heat generated in the surface layer of a body to be heated by electrical means in order to raise or maintain its temperature Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Cable Tray System

Cable Tray System

Definition(s)

Cable Tray System

assembly of cable supports consisting of cable tray lengths or cable ladder lengths and other system components [SOURCE: IEC 61537:2006, 3.1]. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Cable Ladder System

Cable Ladder System

Definition(s)

Cable Ladder System

assembly of cable supports consisting of cable tray lengths or cable ladder lengths and other system components [SOURCE: IEC 61537:2006, 3.1]. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Battery Compartment

Battery Compartment

Definition(s)

Battery Compartment

compartment comprising dedicated rooms, dedicated lockers and dedicated boxes for installation of batteries. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Vapor

Vapor

Definition(s)

Vapor

The gaseous state of materials; vapor release requires elevated temperature for materials which are liquid or solid at ambient temperature. Materials can burn only when in their vapor state. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards
Tagout

Tagout

Definition(s)

Tagout

The placement of a tagout device on an energy isolating device, in accordance with an established procedure, to indicate that the energy isolating device and the equipment being controlled may not be operated until the tagout device is removed. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards
Particulate

Particulate

Definition(s)

Particulate

Inhalable materials considered by ACGIH to be hazardous when deposited anywhere in the respiratory tract. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards
Lower Flammable Limit (LFL)

Lower Flammable Limit (LFL)

Definition(s)

Lower Flammable Limit (LFL)

The concentration of a vapor in air (or other oxidant) below which propagation of flame does not occur on contact with an ignition source. The lower flammable limit is usually expressed as a volume percentage of the vapor in air. Sometimes called Lower Explosive Limit (LEL). API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Welder

Welder

Definition(s)

Welder

The person operating gas or electric welding equipment; the person physically doing the welding. In some publications this person is referred to as a welding operator. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Risk-based Analysis

Risk-based Analysis

Definition(s)

Risk-based Analysis

A review of potential needs based on a risk assessment. Source: API Standards 2217A, Guidelines for Safe Work in Inert Confined Spaces in the Petroleum and Petrochemical Industries, Fourth Edition, July 2009. Global Standards API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Permissible Exposure Limits (PELs)

Permissible Exposure Limits (PELs)

Definition(s)

Permissible Exposure Limits (PELs)

Federal regulations set by the Occupational Safety and Health Administration, U.S. Department of Labor, and found at 29 Code of Federal Regulations 1910.1000 and in the substance specific standards which follow. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Inerting

Inerting

Definition(s)

Inerting

The process of eliminating the potential for a flammable atmosphere by using an inert gas such as nitrogen, carbon dioxide or steam (water vapor) to displace oxygen required for ignition. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards  

Inerting

The process of eliminating the potential for a flammable atmosphere by using an inert gas such as nitrogen or carbon dioxide to displace oxygen required for ignition. Source: API Standards 2217A, Guidelines for Safe Work in Inert Confined Spaces in the Petroleum and Petrochemical Industries, Fourth Edition, July 2009. Global Standards
Hydrogen Blister

Hydrogen Blister

Definition(s)

Hydrogen Blister

Bulge in steel caused by high pressure molecular hydrogen trapped at an internal flaw within steel. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Fume

Fume

Definition(s)

Fume

Small diameter particulate matter formed when vaporized high molecular weight materials condense from the gaseous state. Although solids, fumes are small enough to behave like gases. API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Exposure Limit

Exposure Limit

Definition(s)

Exposure Limit

For chemical agents, a measure of the maximum airborne concentration limits for toxic substances to which workers may be exposed without protection (e.g., respirators). Exposure limits are usually expressed in parts per million or milligrams per cubic meter. Material Safety Data Sheets (MSDSs) from the manufacturer or supplier of the material should list exposure limits. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Chronic Health Hazard

Chronic Health Hazard

Definition(s)

Chronic Health Hazard

Capable of causing adverse health effects resulting from exposure over a long period of time (often at low-level concentrations). API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards
Acute Hazard

Acute Hazard

Definition(s)

Acute Hazard

Capable of causing effects occurring from exposure over a short time, usually within minutes or hours. An acute exposure can result in short-term or long-term health effects. Source: API RP 2009, Safe Welding, Cutting, and Hot Work Practices in the Petroleum and Petrochemical Industries, Seventh Edition, February 2002 (Reaffirmed, March 2012), Global Standards Source: API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards
Normal Atmospheric Conditions

Normal Atmospheric Conditions

Definition(s)

Normal Atmospheric Conditions

Normal atmospheric conditions are defined as conditions that vary above and below reference levels of 101.3 kPa (14.7 psia) and 200 °C (68 °F) provided that the variations have a negligible effect on the explosion properties of the flammable materials. API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, Third Edition, December 2012, Global Standards
Ventilation, No

Ventilation, No

Definition(s)

Ventilation, No

The lack of ventilation in locations where no arrangements have been made to cause air replacement with fresh air. API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, Third Edition, December 2012, Global Standards
Ventilation, Natural

Ventilation, Natural

Definition(s)

Ventilation, Natural

Movement of air and its replacement with fresh air due to the effects of wind or temperature gradients, or both. (Mod. IEC 60079-10) API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, Third Edition, December 2012, Global Standards
Ventilation, Local Artificial

Ventilation, Local Artificial

Definition(s)

Ventilation, Local Artificial

Movement of air and its replacement with fresh air by artificial means (usually extraction) applied to a particular source of release or local area. (IEC 60079-10) API RP 500, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2, Third Edition, December 2012, Global Standards