Laboratory glassware — Interchangeable spherical ground joints
STANDARD published on 1.9.1975
Designation standards: ISO 641:1975
Publication date standards: 1.9.1975
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: International technical standard
Category: Technical standards ISO
Description / Abstract: 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.