ASTM E911-1998(2004)
有聚四氟乙烯(PTFE)插头的玻璃管旋塞阀标准规范

Standard Specification for Glass Stopcocks with Polytetrafluoroethylene (PTFE) Plugs

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标准号

ASTM E911-1998(2004)

发布日期

1998年

实施日期

废止日期

无

中国标准分类号

N64

国际标准分类号

71.040.20 (Laboratory ware and related apparatus)

发布单位

US-ASTM

适用范围

1.1 This specification covers standard dimensional requirements for obtaining, within practical limits, interchangeability in glass stopcocks (Note 1) with polytetrafluoroethylene (PTFE) plugs for ordinary laboratory and industrial applications. It covers dimensional interchangeability only and does not involve design characteristics of the item except where specified, nor does it involve physical or chemical characteristics of the material used. It does not cover glass stopcocks with glass plugs (Note 2) or stopcocks intended for use in high-vacuum work.

Note 18212;A stopcock is defined as consisting of a plug and barrel in assembled configuration.

Note 28212;Glass stopcocks with glass plugs are covered by Specification E 675.

Note 38212;The dimensions pertaining to stopcocks were taken from the now obsolete Commercial Standard CS 21-58 of the U.S. Department of Commerce and Product Standard PS 28-70 published by the National Bureau of Standards.

Note 48212;Although glass is the most common material for stopcocks, other materials may be used as specified. Stopcocks constructed from glass shall be in accordance with Specifications E 438 and E 671.