What is the standard for pressure relief devices specifically for Natural Gas Vehicle fuel containers?

The standard that specifically addresses pressure relief devices (PRDs) for Natural Gas Vehicle (NGV) fuel containers is ANSI/IAS PRD 1. This standard outlines the requirements and testing methods for pressure relief devices essential to the safe operation of NGV fuel tanks. It provides guidelines to ensure these devices properly function to prevent over-pressurization, which is critical for the safety of both the vehicle and its occupants.

While the other options refer to standards related to gases, pressure devices, or automotive equipment, they are not specifically tailored for natural gas vehicle fuel containers. For instance, CGA P-1 focuses on the general requirements for compressed gas cylinders, ANSI/CSA PRD 1b pertains to different types of pressure relief devices across various applications, and 49 CFR 571.304 pertains primarily to motor vehicle safety standards but does not specifically target NGV fuel container pressure relief devices. Therefore, ANSI/IAS PRD 1 is the relevant standard that comprehensively addresses the unique considerations for pressure relief devices used in CNG applications.