Gas cylinders — Ball valves — Specification and testing
This document specifies design, type testing, marking, manufacturing tests and examinations requirements for ball valves used as:
closures of refillable transportable gas cylinders, pressure drums and tubes;
main valves for cylinder bundles;
valves for cargo transport units [e.g. trailers, battery vehicles, multi-element gas containers (MEGCs)];
which convey compressed gases, liquefied gases…
Exigences de qualité en soudage par fusion des matériaux métalliques — Partie 5: Documents auxquels ...
Le présent document spécifie les Normes internationales, y compris leur articles et paragraphes avec lesquelles la conformité aux exigences de qualité de l'ISO 3834-2, l'ISO 3834-3 ou l'ISO 3834-4 peut être déclarée.
NOTE Pour le brasage fort, voir l’ISO 22688.
Information technology - JPEG XL image coding system - Part 2: File format
This document specifies the transport and container formats for JPEG XL codestreams as specified in ISO/IEC 18181-1. This document specifies how to add metadata and extensions to JPEG XL codestreams. A file as described by this document is called a JPEG XL file.
UHV AC transmission systems - Part 202: UHV AC transmission line design
IEC TS 63042-202:2021(E) provides common rules for the design of overhead transmission lines with the highest voltages of AC transmission systems exceeding 800 kV, so as to provide safety and proper functioning for the intended use.
This technical specification aims to give the main principles for the design of UHV AC overhead transmission lines, mainly including selection of clearance,…
Semiconductor devices - Part 5-12: Optoelectronic devices - Light emitting diodes - Test method of L...
IEC TR 60747-5-12:2021(E) discusses the terminology and the measuring methods of optoelectronic efficiencies of single light emitting diode (LED) chip or package without phosphor. White LEDs for lighting applications are out of the scope of this part.
This technical report provides guidance on
- terminology of optoelectronic efficiencies of single LED chip or package without phosphor, such as…
