Standard Specification for Glass Stopcocks with Polytetrafluoroethylene (PTFE) Plugs
|Publication Date:||10 April 1998|
|ICS Code (Laboratory ware and related apparatus):||71.040.20|
This specification covers standard dimensional requirements for obtaining, within practical limits, interchangeability in glass stopcocks (Note 1) with polytetrafluoroethyl
NOTE 1-A stopcock is defined as consisting of a plug and barrel in assembled configuration.
NOTE 2-Glass stopcocks with glass plugs are covered by Specification E675.
NOTE 3-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 4-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 E438 and E671.
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.