High Temperature Hydrogen Attack Services

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Full inspection approach as per API 941 and API RP 586 Section 2

Page last modified

November 23 2023

Within some Industrial processes the presence of Hydrogen, when occurring at high temperature and pressure, makes plant and systems susceptible to damage caused by the onset of a phenomena known as High Temperature Hydrogen Attack (HTHA).

TUV Rheinland Sonovation has a full inspection approach available as per API 941 and guiding principles of the new forthcoming API RP 586 (Section 2). Determine inspection scope based on FFS approach + inspection of welds and parent material, taking replicas and boat samples. Assessment of inspection results based on API 579. The new pioneering technique will enable on-stream high temperature monitoring of HTHA defects in-service without a need to shutdown the plant.

Pro/con

Total inspection approach based on API941

Cost effective

Reliable and reproducible

Large experience

Service globally available

Unpredictability of the damage phenomena

Specification

Areas of Application Assets in Hydrogen related environment

Capabilities FFS calculations to determine inspection scope and results. Replicas: Intergranular cracking Weld/parent material: > 10% of wall thickness affected and macro cracking.

Compliance API 941 and API 579 and API RP 586 Section 2

Temperature Ambient, however monitoring at high temp is possible at size of macro cracking