Tanks A Lot
Contributor
I may miss some pieces of the puzzle for early times, but as far as I can trace it back, the history was as follows.
- From at least 1979, DIN477-1 specified a connector for 200bar compressed air. Confusingly, the test pressures of the associated cylinders were 300bar or 450bar, if the working pressure was not exceeding 200bar. This connector is #13 and colloquially called 200bar DIN connection.
- In 1999 EN144-2 was codified and included the above connector, while also changing the rated pressure to 232bar. EN144-2 at the same time introduces a new connector for pressures up to 300bar.
- In 2000 ISO12209-2 picks up both connectors from EN144-2 and further countries implement it.
- In 2010 connector #13 was not specified in DIN477-1 anymore, but only referred to EN144-2.
- In 2013, all three ISO12209 parts get combined, the yoke connections, threaded connections and adapter get lumped into one document.
- In 2018, EN144-2 removed all specifics for the connectors and simply referred to ISO12209:2013.
- In 2020, DIN477 picked up the connector again under the 232bar rating, where it remains specified until today.
As far as I know. the only relevant parts of DIN477 were DIN477-1, specifying the "DIN" connection and DIN477-6, specifying cylinder to valve connections (Especially interesting with regards to the valve flange). In 2020, all DIN477 parts were combined.
