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download between 0-24 hoursReleased: 1975
Laboratory glassware — Interchangeable spherical ground joints
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|Standard´s number:||ISO 641|
The requirements deal with the geometric charateristics to ensure interchangeability. The dimensions of the joint-ground zone and the outer diameter of the tube connected to the joint are given in a table and illustrated in a drawing. In addition the surface finish is specified. A system of gauges (stell balls) for testing the ball cup is tabled. In the annex a method of testing the leakage including the apparatus is described.
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