Deutsches Institut fur Normung.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Deutsches Institut für Normung e.V.
Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards
DIN: the norm issued by the Deutsche Institut fur Normalisierung.
Source: Mining Regulation of the Netherlands, WJZ 02063603, Netherlands,16 December 2002. Regulations