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This specification provides the minimum requirements for design, construction, performance, and testing of two types of tank vent flame arrester (Type I and Type II). This specification is intended for flame arresters protecting systems containing vapors of flammable or combustible liquids with the specified vapor temperature. The defined test media can be used except where arresters protect systems handling vapors with the given value of maximum experimental safe gap (MESG). Flame arresters protecting such systems must be tested with appropriate media. The flame arrester housing, and other parts or bolting used for pressure retention, shall be constructed of the prescribed materials. Arrester, elements, gaskets, and seals shall be of materials resistant to attack by seawater and the liquids and vapors contained in the tank being protected. Nonmetallic materials, other than gaskets and seals, shall not be used in the construction of pressure-retaining components and nonmetallic gaskets and seals shall be noncombustible and suitable for the service intended. The possibility of galvanic corrosion shall be considered in the selection of materials. Requirements for flame arrester design and construction, housings, elements, threaded or flanged pipe connections, joints, and fastenings are detailed. Prototype testing such as corrosion test, performance test, endurance burn test, and flashback test shall be done.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification provides the minimum requirements for design, construction, performance, and testing of tank vent flame arresters.
1.2 This specification is intended for flame arresters protecting systems containing vapors of flammable or combustible liquids where vapor temperatures do not exceed 60°C. The test media defined in 9.1.1 can be used except where arresters protect systems handling vapors with a maximum experimental safe gap (MESG) below 0.9 mm. Flame arresters protecting such systems must be tested with appropriate media (the same vapor or a media having a MESG no greater than the vapor). Various gases and their respective MESG are listed in Table 1.
1.3 The values stated in either inch-pound or SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The following precautionary caveat pertains only to the test methods portions, Sections 8 and 9, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.5 This standard should be used to measure and describe the properties of materials, products, or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of materials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
F722 Specification for Welded Joints for Shipboard Piping Systems
F1155 Practice for Selection and Application of Piping System Materials
ANSI StandardB16.5 Pipe Flanges and Flanged Fittings Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
ICS Number Code 13.220.01 (General standards related to fire protection)
UNSPSC Code 46191506(Flame arrestor)