What is ISO 9803-2 about?
ISO 9803‑2 is the second part of the multi-series European standard that specifies mounting dimensions for vacuum pipeline fittings (elbows, tees, and crosses) of knife-edge flange for nominal bores from 16 mm to 200 mm.
Who is ISO 9803-2 for?
ISO 9803‑2 on pipeline fittings in vacuum technology applies to:
- Manufacturers of vacuum fittings
- Distributors and suppliers of elbows, tees, and crosses
- Space researchers and Scientists
- Vacuum insulated glazing
- Medical industry
Why should you use ISO 9803-2?
A vacuum fitting is that which extends from a pump's suction side to a vacuum fitting at or below the water line for connecting underwater cleaning equipment.
ISO 9803-2 includes guidelines for standard design specifications for vacuum pipeline fittings, will assist you in fabricating cost-effective and efficient components of vacuum pipeline fittings.
ISO 9803-2, which contains the specification of the dimensions for knife-edge flange type vacuum pipeline fittings, will help manufacturers to produce reliable and effective products by ensuring that they conform to the standard quality guidelines
What’s changed since the last update?
BS ISO 9803‑2:2020 supersedes BS ISO 9803‑2:2007, which is withdrawn. BS ISO 9803‑2:2020 includes some technical changes concerning BS ISO 9803‑2:2007. These include:
- The normative references have been updated.
- Reference [2] has been updated.

