ASTM Int'l Surface Analysis Committee to Develop Standard for Knife-Edge Flanges - ASTM WK21206
December 22, 2008 // Published as a news service by IHS
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ASTM International Committee E42 on Surface Analysis is developing ASTM WK21206 - Specification for Dimensions of Knife-Edge Flanges.
No industry standard exists that addresses the vacuum sealing requirements of knife-edged flanges for high vacuum applications, according to ASTM International.
Existing international standards focus on interchangeability of the hardware, but do not address the reliability of the seal, said ASTM International.
The proposed standard is being developed by Subcommittee E42.13 on Vacuum Technology.
"Since there is no consensus standard for the appropriate dimensions of flanges, the users either do not specify dimensions and leave the possibility that the product is not suited for high vacuum application or they develop their own specification, which may not conform to manufacturing norms," said Stuart Tison, vice president, business development, Entegris Inc. and chair of E42.13.
"Both scenarios ultimately result in higher cost for the end-user."
Tison said that the proposed standard will allow for consistency between manufacturing that would enable interchangeability of hardware and would also capture best practices and result in the best performing seal.
Primary users of the standard will be the electronics, aerospace and research industries. In addition, manufacturers of vacuum hardware will use the standard to comply with industry norms. A subcommittee task group was formed to develop the standard.
Source: ASTM International.