ISO 12619-9-2017 PDF

Full title and description

ISO 12619-9:2017 — Road vehicles — Compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends fuel system components — Part 9: Pressure relief valve (PRV). This part of ISO 12619 specifies tests and performance requirements for pressure relief valves intended for use in CGH2 and hydrogen/natural gas blend vehicle fuel systems.

Abstract

ISO 12619-9:2017 defines the functional tests and minimum requirements that a pressure relief valve (PRV) must meet when used in road-vehicle fuel systems that contain compressed gaseous hydrogen (CGH2) or hydrogen/natural gas blends. It sets applicability limits (e.g., excludes liquefied hydrogen systems, fuel containers and fuel-cell vehicles), specifies that pressures are treated as gauge pressures unless stated otherwise, and provides criteria for performance, leakage and durability under defined test conditions.

General information

• Status: Published (confirmed on review).
• Publication date: 2017-08 (Edition 1: 2017).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.060.40 — Fuel systems (road vehicles).
• Edition / version: Edition 1 (2017).
• Number of pages: Indicative pagination from the ISO record: 5 pages (published sample). Note: some distributor listings show different pagination for national adoptions (catalog listings vary).

Scope

This standard applies to pressure relief valves (PRVs) used as components in road-vehicle fuel systems that use compressed gaseous hydrogen (CGH2) in accordance with ISO 14687 (fuel quality) or hydrogen/natural gas blends using natural gas in accordance with ISO 15403 (fuel quality). It is not applicable to liquefied hydrogen (LH2) systems, fuel containers, stationary gas engines, container mounting hardware, electronic fuel management systems, refuelling receptacles or fuel-cell vehicles. The standard focuses on the PRV’s operational and safety performance under specified test conditions.

Key topics and requirements

• Performance and functional tests for PRV opening/closing characteristics, set pressure and reseat behaviour under CGH2 and H2/NG blend conditions.
• Leakage limits, endurance/durability checks and assessment after cycling and environmental exposure.
• Requirements that test pressures are interpreted as gauge pressures unless otherwise stated.
• Procedures to verify compatibility with fuel compositions specified by ISO fuel-quality standards (ISO 14687 and ISO 15403).
• Notes on items out of scope (e.g., LH2, containers, refuelling receptacles) and guidance that other miscellaneous components can be assessed using appropriate functional tests.

Typical use and users

Primary users include automotive OEMs, PRV and fuel-system component manufacturers, test and certification laboratories, type-approval authorities and safety engineers working on hydrogen and hydrogen/blend fuel systems for light- and heavy-duty road vehicles. The standard is used to specify supplier requirements, design verification tests, and acceptance checks during component qualification and vehicle integration.

Related standards

ISO 12619-9 is one part of the ISO 12619 series addressing CGH2 and hydrogen/natural gas blend fuel system components (other parts cover general requirements, test methods and specific components such as manual cylinder valves, automatic valves, pressure regulators, check valves, pressure indicators, pressure relief devices, flexible and rigid fuel lines, excess-flow valves, filters and fittings). Key related references include ISO 12619‑1 (general requirements and definitions) and other part numbers in the 12619 series used for complementary component requirements and test methods.

Keywords

ISO 12619-9, pressure relief valve, PRV, compressed gaseous hydrogen, CGH2, hydrogen/natural gas blends, vehicle fuel system components, fuel-system testing, component qualification, fuel quality (ISO 14687, ISO 15403).

FAQ

Q: What is this standard?

A: ISO 12619-9:2017 is the part of the ISO 12619 series that specifies tests and requirements for pressure relief valves used in road-vehicle fuel systems that contain compressed gaseous hydrogen (CGH2) or hydrogen/natural gas blends.

Q: What does it cover?

A: It covers functional and performance tests, leakage and endurance checks, set-pressure and reseat behaviour, and the conditions under which those tests are performed; it also states what is outside its scope (for example LH2 systems and fuel containers).

Q: Who typically uses it?

A: Vehicle manufacturers, component suppliers (PRV manufacturers), testing and certification laboratories, regulators and safety engineers working on hydrogen and hydrogen/blend fuel systems.

Q: Is it current or superseded?

A: ISO 12619-9:2017 was published in 2017 (Edition 1) and the ISO record indicates it was reviewed and confirmed (the published version remains current as reviewed). Users should verify national adoption or amendments from their national body if required.

Q: Is it part of a series?

A: Yes — it is one part of the ISO 12619 series (multiple parts address specific components and general test methods for CGH2 and hydrogen/natural gas blend vehicle fuel systems). See related parts (e.g., ISO 12619-1, -2, -3, -4, -5, -6, -7, -8, -10, etc.) for complementary requirements.

Q: What are the key keywords?

A: Pressure relief valve (PRV), CGH2, hydrogen/natural gas blend, fuel system components, ISO 12619, fuel-system testing, set pressure, leakage, durability.