Friction stir welding - Aluminium - Part 4: Specification and qualification of welding procedures (ISO 25239-4:2020); German version EN ISO 25239-4:2020
Edition 2020-12

Consumer audio/video equipment - Digital interface - Part 4: MPEG2-TS data transmission (IEC 61883-4:2004); German version EN 61883-4:2005
Edition 2006-03

Railway applications - Tank wagons - Part 4: Devices for top filling and emptying of liquid products; German version EN 12561-4:2011
Edition 2011-10

Basic principles for graphical symbols for use on equipment - Part 4: Guidelines for the adaptation of graphical symbols for use on screens and displays (icons) (ISO 80416-4:2005)
Edition 2008-12

Aerospace series - Connector, electrical and optical, rectangular, modular, rectangular inserts, operating temperature 175 °C (or 125 °C) continuous - Part 142: Size 4 receptacle for rack and panel application, class C and D - Product standard; German and English version EN 4644-142:2016
Edition 2017-03

Optics and photonics - Optical coatings - Part 4: Specific test methods: abrasion, adhesion and resistance to water (ISO 9211-4:2022)
Edition 2023-07

Electromagnetic pulse welding - Part 4: Specification and qualification of welding procedures; German version EN 18007-4:2024
Edition 2024-09

Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 4: Specific functional requirements for renovation; German version EN 12007-4:2012
Edition 2012-10

Optics and photonics - Interferometric measurement of optical elements and optical systems - Part 4: Interpretation and evaluation of tolerances specified in ISO 10110 (ISO 14999-4:2015)
Edition 2016-04

Road and airfield surface characteristics - Test methods - Part 4: Method for measurement of slip/skid resistance of a surface - The pendulum test; German version EN 13036-4:2011
Edition 2011-12