1. BS EN ISO 23936-1:2009. Petroleum, petrochemical and natural gas industries - Non-metallic materials in contact with media related to oil and gas production Part 1: Thermoplastics (ISO 23936-12009)

2. BS EN ISO 23936-2:2011. Petroleum, petrochemical and natural gas industries - Non-metallic materials in contact with media related to oil and gas production Part 2: Elastomers

3. BS EN ISO 23993:2010. Thermal insulation products for building equipment and industrial installations - Determination of design thermal conductivity (ISO 239932008)

4. BS EN ISO 24817:2015. Petroleum, petrochemical and natural gas industries - Composite repairs for pipework - Qualification and design, installation, testing and inspection

5. BS EN ISO 25139:2011. Stationary source emissions - Manual method for the determination of the methane concentration using gas chromatography (ISO 251392011)

6. BS EN ISO 25457:2008. Petroleum, petrochemical and natural gas industries - Flare details for general refinery and petrochemical service (ISO 254572008)

7. BS EN ISO 25980:2014. Health and safety in welding and allied processes - Transparent welding curtains, strips and screens for arc welding processes

8. BS EN ISO 26304:2011. Welding consumables - Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels - Classification (ISO 263042011)

9. BS EN ISO 27509:2012. Petroleum and natural gas industries - Compact flanged connections with IX seal ring

10. BS EN ISO 27627:2014. Petroleum and natural gas industries - Aluminium alloy drill pipe thread connection gauging (ISO 276272014)