This recommended practice (RP) API RP 934-C:2019(R2024) outlines the essential materials and fabrication standards necessary for the construction of new heavy wall pressure vessels and heat exchangers made from 11/4Cr-1/2Mo steel, specifically designed for use in high-temperature and high-pressure hydrogen environments.

The document provides comprehensive guidelines that ensure the integrity and reliability of these critical components, which are vital in various industrial applications involving hydrogen. By specifying the appropriate materials, the RP aims to enhance the performance and safety of pressure vessels and heat exchangers under demanding operational conditions.

In addition to material specifications, this RP also addresses the fabrication processes required to achieve optimal performance and durability. It emphasizes the importance of adhering to industry best practices during manufacturing to prevent potential failures and ensure the longevity of the equipment.

Furthermore, the recommended practice serves as a valuable resource for engineers and manufacturers involved in the design and production of pressure vessels and heat exchangers. By following these guidelines, stakeholders can ensure that their equipment meets the rigorous demands of high-temperature and high-pressure hydrogen service, ultimately contributing to safer and more efficient operations in the field.