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1.1 This specification covers staple or continuous filament carbon/graphite yarn valve stem compression packing, suitable for use as end-rings on packing systems for valves. Intended services include steam, hydrocarbons, water and non-oxidizing chemicals. Where this specification is invoked as ASTM F2191, Sections 1 – 18 apply. Where this specification is invoked as ASTM/DoD F2191, Sections 1 – 18 and the Supplementary Requirements shall be applicable.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C135 Test Method for True Specific Gravity of Refractory Materials by Water Immersion
C561 Test Method for Ash in a Graphite Sample
C562 Test Method for Moisture in a Graphite Sample
C816 Test Method for Sulfur in Graphite by Combustion-Iodometric Titration Method
C889 Test Methods for Chemical and Mass Spectrometric Analysis of Nuclear-Grade Gadolinium Oxide (Gd2O3) Powder
D129 Test Method for Sulfur in Petroleum Products (General High Pressure Decomposition Device Method)
D512 Test Methods for Chloride Ion In Water
D1179 Test Methods for Fluoride Ion in Water
D1246 Test Method for Bromide Ion in Water
D3178 Test Methods for Carbon and Hydrogen in the Analysis Sample of Coal and Coke
D3684 Test Method for Total Mercury in Coal by the Oxygen BombCombustion/Atomic Absorption Method
D3761 Test Method for Total Fluorine in Coal by the Oxygen Bomb Combustion/Ion Selective Electrode Method
D3951 Practice for Commercial Packaging
D4239 Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-Temperature Tube Furnace Combustion
ICS Number Code 55.040 (Packaging materials and accessories)
UNSPSC Code 24120000(Packaging materials)