Foreword

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This document was prepared by Technical Committee ISO/TC 112, Vacuum technology.

This second edition cancels and replaces ISO/TS 3669‑2:2007, which has been technically revised with the following changes:

— As a result of its relation to ISO 2861, ISO 9803‑1, ISO 9803‑2 and ISO 21358, the title has changed to Vacuum technology — Bakeable flanges — Dimensions of knife-edge flanges.
— Clause 1: pressure range in scope “from atmospheric to as low as 10^-13 Pa” has changed to practical range “from atmospheric to as low as 10^-11 Pa”, since this document deals with industrial standards.
— Clause 3: “knife-edge style flange” has changed to “knife-edge flange”.
— Clause 4: “l₈ – depth of pipe connection” has changed to “l₈ – setback for inner rotatable ring”.
— Clause 4: “l₁₁ – outside diameter of metal gasket” has changed to “l₁₀ – outside diameter of metal gasket”.
— Clause 4: units of l₂, l₃, l₄, l₅, l₆, l₇, l₈, l₉ and l₁₀ are now in mm, rather than mm (in), since inch values are not given in Table 1.
— Table 1: effectual values of l₄, l₅, l₆, l₇ and l₈ have changed from XX.X0 to XX.X, after considering their tolerance, 0.1.
— Table 1: footnote added for the most commonly used flanges (16, 40, 63, 100, 160, 200 and 250CF).
— Table 1: l₁, Nominal outside diameter of 400CF has changed from 16,5 to 18,5.

BS ISO 3669:2017

Vacuum technology. Bakeable flanges. Dimensions of knife-edge flanges

Published:

30 Sep 2017

Withdrawn:

14 Feb 2020