Standard Specification for Packing Material, Graphitic or Carbon Braided Yarn
STANDARD published on 1.10.2025
Designation standards: ASTM F2191/F2191M-13(2025)
Publication date standards: 1.10.2025
The number of pages: 9
Approximate weight : 27 g (0.06 lbs)
Country: American technical standard
Category: Technical standards ASTM
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.
Keywords:
carbon braided yarn, graphite, packing material, valve stem compression packing,, ICS Number Code 55.040 (Packaging materials and accessories)