ISO 9803-1:2020 pdf download.Vacuum technology — Mounting dimensions of pipeline fittings — Part 1: Non knife-edge flange type.
ISO 9803-1:2020 specifies mounting dimensions for vacuum pipeline fittings (elbows, tees and crosses) of non knife-edge flange for nominal bores from 10 mm to 250 mm of the R5 series.
ISO 9803: 1993 defined only those pipeline fittings whose flanges are non knife-edge type, as defined in IS0 1609: 1986 and IS0 2861-1: 1974. The previous revision divided ISO 9803: 1993 into two parts:
—this part of IS0 9803, in which fittings with non knife-edge flanges are defined, and
—ISO 9803-2, in which fittings with knife-edge flanges as specified in ISo 3669 are defined.
This document deals with dimensions of pipeline fittings whose flanges are of non knife-edge type, as defined in IS0 1609 and ISO 2861.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1609, Vacuum technology Dimensions of non-knife edge flanges ISO 2861, Vacuum technology – Dimensions of clamped-type quick-release couplings.
4 Requirements
4.1 Mounting dimensions of the vacuum pipeline fittings shall be as specified in Table 1. See Figures 1 to 3.
4.2 Flange dimensions shall be as specified in ISO 1609 and ISO 2861. One or more flange should be rotatable.