What are the recommended maintenance practices for piping and pipelines in hydrogen gas transport according to ASME B31.12?

Introduction

ASME B31.12 provides guidelines for the maintenance of piping and pipelines used in hydrogen gas transport. It emphasizes the importance of robust maintenance routines and corrosion control measures.

Answer

ASME B31.12 recommends the implementation of a comprehensive maintenance routine for piping and pipelines in hydrogen service. This includes both internal and external corrosion controls. The code suggests the use of welded joints to prevent leaks, and it highlights the need to maintain access to joints and fittings for inspection purposes. While no specific recommendations are given for repair in the context of hydrogen service, it is essential to follow approved procedures for replacement and repair to ensure the integrity of the system.