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Standard Specification for Glass Stopcocks with Polytetrafluoroethylene (PTFE) Plugs
Automaticky přeložený název:
Standardní specifikace pro Skleněné kohoutů s polytetrafluorethylenu (PTFE) Zátky
NORMA vydána dne 1.6.2015
Označení normy: ASTM E911-98(2015)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.6.2015
Kód zboží: NS-610698
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
glass, PTFE, stopcocks ,, ICS Number Code 71.040.20 (Laboratory ware and related apparatus)
1. Scope | ||||||||||||||||||||
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 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.
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2. Referenced Documents | ||||||||||||||||||||
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