The development and testing of asbestos-free gasket materials

Technical Report · Wed Jan 01 00:00:00 EST 1992

OSTI ID:6792893

Mallow, W A ^[1]

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1. Southwest Research Inst., San Antonio, TX (United States)

Of the 27 vendors contacted, 11 submitted asbestos-free gasket materials for thermal analysis followed by hydrostatic pressure testing, steam pressure testing, and fire testing. Virtually all were acceptable up to 400 C (air-free), and most were stable to 700 C. Several can be used to over 900 C in air or gases, since they are ceramic. Several graphitic gaskets are serviceable to 900 C in absence of air. Several performed well in steam pressure testing to 315 C, requiring a single adjustment in bolt/flange pressure after pressurization. Many acquired a compression set and consequent slight pressure loss, but responded well to bolt tightening. All except one are made of compressed ceramic or graphite fiber with 0-35 wt% binder, hence was inelastic but malleable/compressible. The large number of ceramic-and graphitic-based gasket materials obviated the need for further development; efforts were concentrated on critical evaluation of the off-the-shelf available materials, in comparison with asbestos.

• Research Organization: American Gas Association, Inc., Arlington, VA (United States). Pipeline Research Committee; Southwest Research Inst., San Antonio, TX (United States)
• Sponsoring Organization: AGA; American Gas Association, Inc., Arlington, VA (United States)
• OSTI ID: 6792893
• Report Number(s): AGA-93007095
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
03 NATURAL GAS
36 MATERIALS SCIENCE
GASKETS
COMPARATIVE EVALUATIONS
MATERIAL SUBSTITUTION
TESTING
NATURAL GAS DISTRIBUTION SYSTEMS
PIPELINES
ASBESTOS
CERAMICS
FIRES
GRAPHITE
HYDROSTATICS
PRESSURIZATION
PROGRESS REPORT
RECOMMENDATIONS
STEAM
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
THERMAL ANALYSIS
CARBON
DOCUMENT TYPES
ELEMENTAL MINERALS
ELEMENTS
EVALUATION
MINERALS
NONMETALS
SEALS
TEMPERATURE RANGE
420205* - Engineering- Transport & Storage Facilities- (1980-)
032000 - Natural Gas- Transport
Handling
& Storage
360205 - Ceramics
Cermets
& Refractories- Corrosion & Erosion
360604 - Materials- Corrosion
Erosion
& Degradation