# EN 737-3 Medical gas pipeline systems, Part 3 (withdrawn)

EN 737-3:1998 + A1:1999, Medical gas pipeline systems, Part 3: Pipelines for compressed medical gases and vacuum, is a withdrawn European (CEN) standard; DIN Media lists its German edition, DIN EN 737-3:2000-01, as withdrawn and replaced by DIN EN ISO 7396-1, whose current edition adopts EN ISO 7396-1:2016 + A1:2019.

## Status

EN is the designation of a European standard published by CEN or CENELEC. DIN Media lists DIN EN 737-3:2000-01, the German version of EN 737-3:1998 + A1:1999 (76 pages, published in January 2000), as withdrawn. That edition replaced DIN EN 737-3:1998-11 and was itself replaced by DIN EN ISO 7396-1:2007-07 and DIN EN ISO 7396-1:2010-08.

## What it covered

As its title says, EN 737-3 was Part 3 of a European series on medical gas pipeline systems and dealt with pipelines for compressed medical gases and vacuum. DIN Media names DIN EN ISO 7396-1 as the document that replaced it.

## What to cite instead

- In Europe: EN ISO 7396-1:2016 + A1:2019. DIN Media lists DIN EN ISO 7396-1:2019-06, the German version of EN ISO 7396-1:2016 + A1:2019 (ISO 7396-1:2016 + Amd 1:2017), as current; it replaces DIN EN ISO 7396-1:2016-09.
- Internationally: [ISO 7396-1:2016](https://library.ultracontrolo.com/standards/iso-7396-1/) with Amendment 1:2017. ISO lists it as current but expects it to be replaced by a new ISO 7396-1 within the coming months, so check iso.org before quoting the edition.
- ISO 7396-1:2016 covers pipelines for medical gases, air and nitrogen for driving surgical tools, and vacuum. Anaesthetic gas scavenging disposal systems are covered by [ISO 7396-2](https://library.ultracontrolo.com/standards/iso-7396-2/), and terminal units by [ISO 9170-1](https://library.ultracontrolo.com/standards/iso-9170-1/).

A specification that asks for EN 737-3 refers to a standard that DIN Media lists as withdrawn.

### Is EN 737-3 still valid?

No. DIN Media lists DIN EN 737-3:2000-01 (EN 737-3:1998 + A1:1999) as withdrawn and replaced by DIN EN ISO 7396-1.

### What replaced EN 737-3?

EN ISO 7396-1. DIN Media lists DIN EN ISO 7396-1:2019-06, the German version of EN ISO 7396-1:2016 + A1:2019, as the current edition.

## Sources

- [DIN Media, DIN EN 737-3:2000-01 (EN 737-3:1998 + A1:1999), withdrawn](https://www.dinmedia.de/en/standard/din-en-737-3/23761296)
- [DIN Media, DIN EN ISO 7396-1:2019-06 (EN ISO 7396-1:2016 + A1:2019)](https://www.dinmedia.de/en/standard/din-en-iso-7396-1/279624021)
- [ISO 7396-1:2016, Medical gas pipeline systems, Part 1 (iso.org)](https://www.iso.org/standard/60061.html)
- [EVS, standards designations (EN, EN ISO)](https://www.evs.ee/en/evs-en-iso-23402-3-2024)

Reviewed: 2026-10-23. Ultra Controlo engineering. https://library.ultracontrolo.com/standards/en-737-3/