CNG cylinders must be marked and tested according to which code?

CNG cylinders are critical components of compressed natural gas delivery and must adhere to strict safety regulations. The correct marking and testing of these cylinders fall under the ASME Boiler and Pressure Vessel Code, which provides guidelines for the design, fabrication, inspection, and testing of pressure vessels. This code ensures that CNG cylinders maintain structural integrity at high pressures and helps to prevent accidents or failures during transport and storage.

The ASME code emphasizes the importance of safety standards and thorough testing protocols to confirm that cylinders can withstand the pressures and conditions they will encounter during their service life. Compliance with this code is essential for effective risk management and ensuring the safe delivery of CNG.

Other codes, while relevant in various contexts (such as fire safety or general industrial standards), do not specifically address the requirements for CNG cylinder safety and testing as comprehensively as the ASME Boiler and Pressure Vessel Code.