Steel cylinders must be manufactured and tested in compliance with which specifications?

Steel cylinders used for transporting and storing compressed natural gas (CNG) must be manufactured and tested according to the specifications outlined in DOT (Department of Transportation) 3AA. This specification pertains specifically to seamless steel cylinders that are designed for high-pressure applications, which includes the storage and transport of gases like CNG.

The DOT 3AA standard includes specific requirements regarding the materials used, the manufacturing process, testing methods, and safety regulations to ensure the cylinders can safely withstand the pressures associated with compressed gases. These cylinders are commonly made of steel and have certain dimensions and pressure ratings that determine their use in various applications, including CNG.

Understanding this specification is crucial for ensuring safety and compliance in the handling of high-pressure gas systems. Using the correct specification helps prevent accidents and maintains operational integrity in the transport and usage of compressed natural gas.