Vallourec validates its Cleanwell for hydrogen storage use

Vallourec developed a qualification protocol certifying its VAM® 21 connections’ tightness to hydrogen in 2021.

Vallourec has successfully tested and approved its dope-free solution CLEANWELL for hydrogen storage use, further increasing performance and reducing environmental impact.

Vallourec’s qualification protocol developed in 2021 included the study of VAM® 21’s behaviour to hydrogen, simulating conditions (pressure, temperature, mechanical loads) experienced during storage operations.

The first connection to be qualified was VAM® 21 9 5/8” for storage applications up to 560bar. Additional outside diameters (OD) were evaluated using a combination of physical tests and Finite Element Analysis (FEA). To provide customers with a more advanced offer, including higher running performances and minimal environmental impact, Vallourec tested the sealability in hydrogen applications of its dope-free solution CLEANWELL®.

The validated range now covers dimensions 6 5/8” to 13 5/8”, with different configurations (dope and CLEANWELL®), and will continue to expand according to the needs of our customers.

CLEANWELL® is a non-polluting, multi-functional coating which replaces both storage and running compounds and is applied directly on the surface of VAM® connections.

A thermoset lubricant applied on top of the electro-plated surface provides extreme repeatability and stability throughout make-up. Directly applied at the mill, CLEANWELL® is a zero-waste lubricant, offering an environmentally-friendly alternative to standard compounds.

CLEANWELL® is a very suitable coating for underground storage of gases: its track record of improved running performance and reduced environmental risk combined with VAM® 21’s certified tightness to hydrogen creates a comprehensive offer to ensure the integrity of future hydrogen storage wells. The VAM® 21 CLEANWELL® duo has already gained interest from operators looking to store hydrogen in salt caverns.


Zohaib Ali

Zohaib is the editor of H2 Bulletin. Please click on the email icon to contact me if you want to talk about a news.
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