ISO/TR 7470:2023 PDF

Overview

ISO/TR 7470:2023 - "Gas cylinders - List of provisions" is a Technical Report from ISO/TC 58 (Gas cylinders) that inventories gas cylinder valve outlets in use worldwide. The third edition (2023) consolidates valve outlet information by gas, country and thread type and provides nominal dimensions, designations, references and pressure ratings (given in bar) via downloadable tables. ISO/TR 7470 is a reference listing; complete, prescriptive descriptions of individual valve outlets remain in national standards.

Keywords: ISO/TR 7470, gas cylinders, valve outlets, valve threads, cylinder fittings, thread sizes, nominal dimensions.

Key topics

• Catalogue of valve outlets: Indexed by gas (with UN numbers), showing which valve outlets are used for each gas.
• Valve outlets by country and by thread: Tables/listings identify national practices and thread types.
• Thread types and sizes: Nominal dimensions and thread designations are presented (detailed descriptions are in national standards).
• Pressure information: Pressure ratings are included in bar; note that for compressed gases the pressure usually corresponds to working pressure and for liquefied gases to test pressure.
• Data access: Tables are provided in a spreadsheet available from ISO’s website (https://standards.iso.org/iso/tr/7470/ed-1/en).
• Document status: Technical Report (informative), no normative references or listed terms/definitions in this document.

Applications

ISO/TR 7470 is a practical reference for ensuring correct selection and compatibility of cylinder valve outlets across jurisdictions:

• Selecting appropriate valve outlets during gas cylinder design and manufacturing.
• Specifying valve threads and outlet types for procurement and supply chain compatibility.
• Supporting transportation, storage and handling decisions where valve outlet compatibility affects safety and regulatory compliance.
• Assisting maintenance and cylinder-fitting operations to match valves, regulators and adapters.
• Facilitating international trade and harmonization by showing national variants of valve outlets.

Keywords: valve outlet compatibility, cylinder valve threads, gas cylinder regulation, gas supply safety.

Who uses this standard

• Cylinder and valve manufacturers
• Gas suppliers and distributors
• Safety and engineering teams in laboratories, hospitals, and industrial plants
• Transport and logistics companies handling compressed and liquefied gases
• Standards committees and regulators comparing national valve provisions

Related standards

• National valve outlet standards (complete technical descriptions and requirements)
• ISO/TC 58 publications (cylinder fittings and gas cylinder standards) Note: ISO/TR 7470 is an informative inventory. Users should consult the referenced national standards for prescriptive requirements and detailed thread specifications.