API RP 2009:2002 pdf download

API RP 2009:2002 pdf download.Safe Welding, Cutting, and Hot Work Practices in the Petroleumand Petrochemical lndustries.
3.1 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.
3.2 chronic health hazard: Capable of causing adverse health effects resulting from exposure over a long period of time (often at low-level concentrations).
3.3 competent person: A person identified by the employer as being capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to personnel, and who has authorization to take prompt corrective measures to eliminate them (OSHA 1926.32). The concept of’6competent person” is performance-based relative to the context of the work to be done.
3.4 confined space: An enclosure with known or potential hazards and restricted means of entrance and exit, which is not normally occupied by people, and is usually not well ventilated. Examples of confined spaces in the petroleum industry include: process vessels, vessel tower skirts, flare stacks, boilers, storage tanks, tank cars and trucks, vaults, large-diameter piping, and under certain circumstances, spaces located below ground level, such as pits (OSHA 1910.146).
3.5 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.
3.6 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.
3.7 hazard: An inherent chemical or physical property with the potential to do harm (flammability, toxicity. corrosivity, stored chemical or mechanical energy).
3.8 hot work: An operation that can produce enough heat from flame, spark or other source of ignition, with sufficient energy to ignite flammable vapors, gases, or dust. Hot work includes such things as electric arc and gas welding, chipping, flaming, grinding, gas cutting, abrasive blasting, brazing and soldering. Special procedures and permits are required when hot work is to be performed in certain areas. (Appendix D of ANSI Z49. I lists more than 90 welding and allied processes that would qualify as “hot work.”)
3.9 hydrogen blister: Bulge in steel caused by high- pressure molecular hydrogen trapped at an internal flaw within steel.
3.10 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.
3.11 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).
3.12 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 Regulalions 1910.10(X) and in the substance- specific standards which follow.
3.13 permit: A written document authorizing a work activity and defining the conditions under which the work shall be conducted. Normally signed by both the recipient and an issuing competent person with authority to allow the activity to take place.
3.14 personal protective equipment, PPE: Equipment (such as protective clothing, respiratory devices, protective shields or harriers) worn or used by individuals to protect eyes, face, head and extremities from hazards of equipment, processes or environment capable of causing injury or functional impairment.
3.15 purging: The process of eliminating the potential for a flammable atmosphere by displacing hydrocarbons from a potential hot work area to eliminate the fuel required for ignition.
3.16 qualified person: A person designated by the employer who, by possession of a recognized degree, certificate, or professional standing, or by extensive knowledge, training and experience, has successfully demonstrated ability to identify and solve or resolve problems relating to the subject matter, the work, or the project and, when required, is properly licensed in accordance with federal, state, or local laws and regulations.
3.17 risk: The probability of exposure to a hazard which could result in harm to personnel, property, the environment or general public.