UL 144:1999 pdf download LP-Gas Requlators
Scope
1.1 These requirements cover pressure regulators for use with LP-Gas equipment.
1.2 Regulators covered by these requirements are intended for use in non-refrigerated systems inaccordance with the following standards:
a) Liquefied Petroleum Gas Code,(National Fire Codes, Vol. 2) NFPA 58;
b) National Fuel Gas Code ( IAS/A.GA Z223.1), NFPA 54;
c) Outdoor Cooking Gas Appliances, IAS/A.G.A. Z21.58; and
d) Standard on Recreational Vehicles (RVIAA119.2) (National Fire Codes, Vol. 7), NFPA 501C
1.3 These requirements do not cover:
a) Compressed gas regulators;
b) Gas appliance pressure regulators;
c)Regulators for use in chemical, petroleum, or utility power plants; pipeline or marineterminals; or related storage facilities at such plants or terminals;
d) Combination gas control valves for gas appliances;
e) Regulators for use in oxygen-fuel, gas-welding, and cutting operations; and
f) Regulators for use in engine fuel (automotive and/or marine) applications.
The requirements for (a) – (e) are covered in the Standard for Compressed Gas Regulators, UL 252, andin the Standard for Gas Appliance Pressure Reaulators. AS/A.G.A. Z21.18 and in the Standard forCombination Gas Controls for Gas Appliances,IAS/A.G.A. Z21.78, respectively.
1.4 The assigning of flow ratings to regulators is not within the scope of these requirements, andobservations of flow values are required to ascertain stability characteristics within the manufacturer’srated capacity, These requirements include tests to verify outlet pressure stability characteristics within themanufacturer’s rated capacity. The manufacturer is to submit this data prior to the investigation of thedevice. See the Flow Test, Section 22, regarding the outlet pressure instability definition.
1.5 A product that contains features, characteristics, components, materials, or systems new or differentfrom those covered by the requirements in this standard, and that involves a risk of fire or of electric shockor injury to persons shall be evaluated using appropriate additional component and end-productrequirements to maintain the level of safety as originally anticipated by the intent of this standard. Aproduct whose features,characteristics, components, materials,or systems conflict with specificrequirements or provisions of this standard does not comply with this standard. Revision of requirementsshall be proposed and adopted in conformance with the methods employed for development, revision, andimplementation of this standard.
2 General
2.1 Units of measurement
2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.
2.1.1 revised June 14,2000
2.2 Components
2.2.1 Except as indicated in 2.2.2, a component of a product covered by this standard shall comply withthe requirements for that component.
2.2.2 A component is not required to comply with a specific requirement that:
a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this standard, or
b) ls superseded by a requirement in this standard.
2.2.2 revised June 14, 2000
2.2.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.2.3 revised June 14,2000
2.2.4 Specific components are incomplete in construction features or restricted in performancecapabilities. Such components are intended for use only under limited conditions, such as certaintemperatures not exceeding pecified limits, and shall be used only under those specific conditions.
22.4 revised June 14,2000