WIKA: Safety for users of sour gas applications
Pressure measuring instruments tested successfully 

In sour gas applications, sudden damage caused by sulfur-induced stress corrosion cracking and chlorine-induced pitting presents a risk that cannot be ignored. Through intensive dialogue with users and metallurgy experts WIKA has developed a solution to this problem. 

Tests on the corrosion-resistant alloys used in their products, carried out in cooperation with a renowned University of Applied Sciences and in accordance with EN ISO 15156/ NACE MR 0175 test criteria, confirm the stability of these materials. 

These extensive tests were performed taking into account the make-up of the process medium; the pH value, the temperature and the H₂S partial pressure. In addition the metallurgical condition of the measuring instruments, which is known to have an influence on the behaviour in environments containing H₂S, was taken into consideration. This includes the chemical composition of the alloy, the manufacturing process, the product’s design, the stability, the hardness as well as the final heat treatment of the assembly. 

These materials have proven their suitability over several years of practical use in the field and now also in the laboratory under the metallurgical, mechanical and ambient conditions mentioned above. WIKA offers pressure measuring instruments according to EN ISO 15156/ NACE MR 0175 and can also provide the associated documentation required. 

For more information please contact:

WIKA Alexander Wiegand GmbH & Co. KG
E-Mail: sales@wika.de - Internet: www.wika.de  

Posted: May 23, 2006

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