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Eductor (Liquid Delivery) Tube – A tube inside a cylinder or container attached to the cylinder valve which allows liquid product withdrawal from the cylinder. Effluent Splitter – The part of the analytical instrument that splits the effluent stream into multiple detectors or some to vent for a lower volume of effluent. Environmental Protection Agency (EPA) – This is a government agency that establishes environmental standards within the . EPA Hazard Categories – The hazard categories used throughout this catalog as defined under EPA SARA Title III and 1910.1200 of Title 29 of the Code of Federal Regulations are as follows: “Immediate (Acute) Health Hazard” including highly toxic, corrosive, toxic, irritant, sensitizer, and other hazardous chemicals which cause an adverse effect to a target organ which manifests itself within a short period of time following a one-time, high exposure to the substance. “Delayed (Chronic) Health Hazard” including carcinogens and other hazardous chemicals which cause an adverse effect to a target organ which manifests itself after a long period of time following or during repeated contacts with the substance. “Fire Hazard” including flammable, combustible pyrophoric, and oxidizer. “Sudden Release of Pressure Hazard including explosive and compressed gas. “Reactive Hazard” including unstable reactive, organic peroxide, and water reactive. Exposure Limits – Concentrations of substances (and conditions) under which it is believed that nearly all workers may be repeatedly exposed day after day without adverse effects. ACGIH limits are called TLV and OSHA exposure limits are called PEL. See “Threshold Limit Value.” Elasticity - The ability of a material to change dimensions without breaking when an external force is applied and then to return to the original dimensions when the force is removed. Edge Joint - A joint that occurs when the surfaces of the two pieces of metal to be joined are parallel or nearly parallel, and the weld is made along their edges. Electrode Extension - While welding, the length of electrode extending beyond the end of the gas cup. Also referred to as electrical stickout. Electron - A very small atomic particle which carries a negative electrical charge. Electrons can move from one place to another in atomic structures. It is electrons that move when electrical current flows in an electrical conductor. Etching - When a weld specimen is cut through a weld, an acid or similar solution can be applied to the weld area to bring out the features of the weld. These include the deposited weld metal, heat affected zone, penetration and weld profile. Many different etching solutions and techniques exist for the various kinds of metals. Excessive Melt-Through - A weld defect occurring in a weld joint when weld metal no longer fuses the base metals being joined. Rather, the weld metal falls through the weld joint or “burns through”. Also referred to as excess penetration.
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