Laboratory glassware -- Interchangeable spherical ground joints

رقم المستند: NL ISO 641 : 2008
القطاع: Metrology and Measurement. Physical Phenomena
TC: No
ICS: 71.040.20
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.