This standard BS EN 15807:2021 Railway applications. Pneumatic half couplings is classified in these ICS categories:
45.060.01 Railway rolling stock in general
45.040 Materials and components for railway engineering
This document applies to pneumatic half couplings designed to couple either the brake pipes or main reservoir pipes of railway vehicles, without taking the type of vehicles and track-gauge into consideration.
This document gives the requirements for the design, dimensions, testing and quality assurance of pneumatic half couplings.