AS R17-1954
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
General purpose glass stopcocks
Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users
30-06-2017
English
01-01-1954
Specifies six types and 25 sizes of glass stopcocks, including burette stopcocks. Gives full dimensions and constructional details for a good quality stopcock but, in accordance with current practice in British Standards for volumetric glassware, these details are included for the guidance of manufacturers instead of being mandatory. Includes a leakage test and limit for an ungreased stopcock which should ensure that it can be rendered free from leakage by the application of a minimum film of lubricant.
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