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3. ASME (AMERICAN SOCIETY OF MATERIAL ENGINEERING) ASME B 16.20. Material gaskets for pipes, flanges, ring Joint, Spiral Wounded & Jacketed.
4. ASTM (AMERICAN SOCIETY FOR TESTING AND MATERIALS) ASTM A 516/A 516/M Grade B ASTM A 106, Grade B ASTM a 333 ASTM a 234, Grade WPB ASTM a 105, Grade LF2 ASTM a 350, Grade LF2.
5. Ballaguet JP, et al. Direct H2S removal from high pressure natural gas with the sulfint HP redox process, presented at Sulfur 99, Calgary, Alberta, Canada.