API STD 6FA-2018 pdf download.Standard for Fire Test for Valves.
The purpose of this standard is to establish the requirements for testing and evaluating the pressure-containing performance of API 6A and API 6D valves when exposed to fire. The performance requirements of this standard establish qualification criteria for all sizes and pressure ratings. This standard applies to valves with one or more closure members. This standard establishes acceptable levels for leakage through the test valve and external leakage after exposure to a fire for a 30-minute time period. The fire exposure test period has been established on the basis that it represents the maximum time required to extinguish most fires. Fires of greater duration are considered to be of a major magnitude, with consequences greater than those anticipated in this test. This standard is not intended to address the qualification of valve actuators (including manually operated gearboxes). This standard does not cover check valves, pressure boundary penetration, external fittings, or end connections. 2 Normative References The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies, except that new editions may be used on issue and shall become mandatory upon the effective date specified by the publisher or six months from the date of the revision (where no effective date is specified). API Specification 6A, Specification for Wellhead and Tree Equipment API Specification 6D, Specification for Pipeline Valves and Piping Valves ASTM D1 41 4, Standard Test Methods for Rubber O-Rings ASTM D1 41 8, Standard Practice for Rubber and Rubber Lattices—Nomenclature ASTM D41 2, Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension ASTM D4000, Standard Classification System for Specifying Plastic Materials ASTM D4065, Standard Practice for Plastics: Dynamic Mechanical Properties: 3.1.2 closure member Part of a valve that is positioned in the flow stream to permit flow or to obstruct flow, depending on its position, such as a ball, disc, gate, or plug. 3.1.3 elastomer Amorphous material mechanically mixed with other constituents to form a compound, which is then shaped by flow into articles by means of the manufacturing processes of molding or extrusion, and then (invariably) chemically cured at elevated temperature to form an elastic insoluble material. 3.1 4 nominal pipe size NPS Alphanumeric designation of size that is common for components used in a piping system, used for reference purposes, comprising the letters NPS followed by a dimensionless number indirectly related to the physical size of the bore or outside diameter of the end connection, as appropriate. NOTE The dimensionless number may be used as a valve size identifier without the prefix “NPS.” 3.1.5 nominal size DN Numerical designation of size in millimeters that is common to components in piping systems. NOTE Nominal size is designated by the abbreviation “DN” followed by a number. 3.1.6 qualified person Individual with characteristics or abilities to perform a specific task, gained through training and/or experience. 3.2 Acronyms and Abbreviations For the purposes of this standard, the following acronyms and abbreviations apply. CRA corrosion-resistant alloy DN nominal size in. inch ml milliliter mm millimeter NPS nominal pipe size PEEK polyetheretherketone PTFE polytetrafluoroethylene4 Fire Test 4.1 General Procedures The supplier/manufacturer shall develop procedures for conducting the fire test. These procedures shall be documented and included in the final report of the results. The procedures shall include pre- and post-test inspection activities and identify critical areas to be inspected. The supplier/manufacturer shall document all test parameters and results of the evaluations that demonstrate conformance to this document. Fire testing shall be discontinued if the product or system fails to perform within the limits specified, except when such failure is determined to be the result of a failure within the test facility or test fixture and that failure and its correction do not affect the validity of the test results. Personnel A qualified person shall conduct preparation, testing, and approval of results. Measuring and Monitoring Equipment Measuring and monitoring equipment used during the testing process shall be calibrated in accordance with the requirements of the supplier/manufacturer or test facility. Measuring and monitoring equipment shall be used within its calibrated range.