Petroleum and natural gas industries — Drilling and production equipment | Engineering technical guide Introduction to ISO 28781 ISO 28781:2010 specifies requirements and guidelines for subsurface barrier valves and related equipment used in the petroleum and natural gas industries. These…

Standardized methodologies for assessing surface durability of glass-ceramic coatings Introduction to ISO 28723 ISO 28723 specifies test methods for determining the scratch hardness of vitreous enamel coatings. Vitreous enamel — a glass-ceramic coating fused to metal substrates at high temperatures…

Global standard for spark plug performance, dimensions, and durability requirements Introduction to ISO 28741 ISO 28741 is the international standard governing spark plugs for internal combustion engines. It defines dimensional specifications, performance requirements, test methods, and marking conventions for spark…

Quality requirements and test methods for enameled low-carbon steel products Introduction to ISO 28762 ISO 28762 is the international standard that specifies requirements for vitreous enamel coatings applied to low-carbon steel substrates. Low-carbon steel (typically with carbon content below 0.08%)…

Standard methods for evaluating surface friction and safety of enameled products Introduction to ISO 28763 ISO 28763 specifies test methods for determining the slip resistance of vitreous enamel surfaces. Slip resistance — the frictional characteristic of a surface that resists…

Vitreous and porcelain enamels — Part 3: Thermal shock resistance 1. Understanding Thermal Shock in Glass-Lined Equipment ISO 28721-3:2008 specifies thermal shock resistance requirements for glass-lined chemical process apparatus operating within the temperature range of -25 °C to +230 °C.…

Vitreous and porcelain enamels — Part 4: Quality requirements for glass-lined flanged steel pipes and fittings 1. Scope and Applicability of ISO 28721-4 ISO 28721-4:2015 specifies comprehensive quality requirements for glass-lined flanged steel pipes and fittings used in chemical process…

Vitreous and porcelain enamels — Part 5: Presentation and characterization of defects 1. Systematic Defect Classification Framework ISO 28721-5:2016 establishes a comprehensive and systematic framework for cataloguing, describing, and classifying enamelling defects that occur on glass-lined chemical equipment. The standard…

Standard methods for evaluating coating-substrate bond integrity in advanced ceramics Introduction to ISO 28722 ISO 28722 specifies test methods for determining the adhesion of fine ceramic coatings applied to various substrate materials. Fine ceramics — also known as advanced or…

Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel 1. Principle and Scope of the Cylindrical Vessel Method ISO 28706-4:2016 specifies a test method for determining the resistance of vitreous and porcelain enamelled articles to attack…

Determination of resistance to chemical corrosion by alkaline liquids using a closed system 1. Principle and Scope of the Closed-System (Autoclave) Method ISO 28706-5:2010 specifies a closed-system test method for determining the resistance of vitreous and porcelain enamelled articles to…

Vitreous and porcelain enamels — Part 1: Quality requirements for apparatus, components, appliances and accessories 1. Scope and Quality Framework of ISO 28721-1 ISO 28721-1:2019 specifies comprehensive quality requirements for glass-lined steel apparatus, components, appliances, and accessories used in chemical…

Vitreous and porcelain enamels — Part 2: Designation and specification of resistance to chemical attack and thermal shock 1. Enamel Quality Designation System ISO 28721-2:2025 specifies requirements for the resistance of chemical enamels to chemical attack and thermal shock, establishing…

Design, verification, and testing requirements for fluid systems and components used in spacecraft and launch vehicles Scope and System Classification ISO 28704:2021 establishes comprehensive engineering requirements for fluid systems and components in space systems, covering propellant feed and pressurization systems,…

Standardized test methods for evaluating chemical corrosion resistance of enamel coatings used in chemical process equipment, sanitary ware, and laboratory apparatus. 1. Scope and Significance ISO 28706-1:2008 specifies test methods for determining the resistance of vitreous and porcelain enamel coatings…

Test method for determining the chemical corrosion resistance of vitreous and porcelain enamels to boiling acids, neutral liquids, and their vapours Scope and Industrial Significance ISO 28706-2:2020 specifies a standardized test method for evaluating the chemical corrosion resistance of vitreous…

Determination of resistance to chemical corrosion by alkaline liquids using a hexagonal vessel or tetragonal glass bottle 1. Understanding Alkaline Attack on Vitreous Enamel Vitreous and porcelain enamels are glass-ceramic coatings fused onto metal substrates at high temperatures (typically above…