Diagrams for the chemical and petrochemical industry - Part 2: Graphical symbols
Edition 2012-12

Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 3: Thermal shock resistance
Edition 2008-12

Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 2: Designation and specification of resistance to chemical attack and thermal shock (ISO 28721-2:2015)
Edition 2016-02-10

Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 1: Quality requirements for apparatus, components, appliances and accessories (ISO 28721-1:2019)
Edition 2020-05-06

Fixed Radio Systems; Characteristics and requirements for point-to-point equipment and antennas; - Part 1: Overview, common characteristics and requirements not related to access to radio spectrum (ETSI EN 302 217-1 V3.3.1 (2021-10))
Edition 2022-01-01

Vitreous and porcelain enamels. Glass-lined apparatus for process plants. Quality requirements for apparatus, components, appliances and accessories
Edition 2019-11-08

Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 1: quality requirements for apparatus, components, appliances and accessories
Edition 2019-10-16

Fixed Radio Systems; Characteristics and requirements for point-to-point equipment and antennas; - Part 4: Antennas
Edition 2017-08-01

Vitreous and porcelain enamels - Glass-lined apparatus for process plants - Part 2: Designation and specification of resistance to chemical attack and thermal shock (ISO 28721-2:2015)
Edition 2016-05