The document applies for elbows, which are used in air brakes and other pneumatic systems for road vehicles. It specifies, among others, dimensions, materials and surface finish.
DIN 74315:1999 history
2023DIN 74315:2023-08 Non-soldering compression couplings - Elbow body
2022DIN 74315:2022-06 Word and information processing for office applications - Announcing and dictating of texts and characters
1999DIN 74315:1999 Non-soldering compression couplings - Elbow body