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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. The material shall be of the following types, classes, and grades: Type I, type II, and Type III; Class 1; Class 2; and Class 3; and Grade A and Grade B. The following tests shall be performed: size; mass; carbon assay; ash content; specific gravity; moisture content; detrimental materials tests; analysis of PTFE coating; compression recovery; and braid geometry retention.
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 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 , Sections apply. Where this specification is invoked as ASTM/DoD , Sections 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 are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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 Content 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 Bomb Combustion/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
Military StandardsMIL-P-24503 Packing Material, Graphitic, Corrugated Ribbon or Textured Tape and Preformed Ring MIL-P-24583 Packing Material, Graphitic or Carbon Braided Yarn MIL-STD-129 Marking for Shipment and Storage
ICS Number Code 55.040 (Packaging materials and accessories)
UNSPSC Code 24120000(Packaging materials)
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ASTM F2191 / F2191M-13(2020)e1, Standard Specification for Packing Material, Graphitic or Carbon Braided Yarn, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top