This Part of this European Standard specifies the dimensions of flanged catering containers, perforated containers and lids, based on a module 530 mm x 325 mm.
The containers covered in this Standard are intended to be used with safe supports. NOTE. prEN 631-2 specifies safe supports."
NEN-EN 631-1-1994 history
1994NEN-EN 631-1-1994 Materials and articles in contact with foodstuffs.Catering containers.Part 1:Dimensions of containers