: This part provides the requirements for the components, design, installation, and testing of long-distance hydrogen transmission pipelines.

The ASME B31.12 standard is organized into three main parts, each serving a specific purpose:

, a phenomenon where hydrogen atoms penetrate the crystalline structure of metals, leading to sudden, brittle fractures and reduced fatigue resistance.

Key defined terms include:

The current version of ASME B3112 is just the beginning. Industry committees are already working on revisions to include: