Cryogenic valves

Microfinish cryogenic line is available in trunnion mounted valve type up to 24 inch
(DN 600) and floating ball type up to 10 inch (DN 250). The various configurations are available in reduced bore and full bore designs, and pressure classes from ASME 150 to 2500 (size dependent). The valve must function properly at temperatures as low as -269°C/-450°F, precise tolerances are set for those parts to be subjected to thermal shock and shrinkage. Furthermore, some cryogens such as LOX and LNG are flammable; so the valve must be designed to be fire safe as specified in API 607, API 6FA, and ISO 10497 standards. Microfinish cleaning procedures for the cryogenic line is in full compliance with the following international standards and corporate specifications: CGA G-4.1, ASTM A380/A380M; EIGA 33.06; Linde standard LS 141-47 part 1 and 2; Linde standard
LS 031-6X7; Praxair standard GS-38 and GS-40; and Reliance standard
spec No.100080-1-SS-PP-004-Part IV App. B and E. 

Applicable standards

Design standard ASME B16.34, ISO 17292, API 608, API 6D 
Cryogenic design BS 6364, EN 1626, EN 28921-1 (optional)
Testing standard BS 6364, API 598, EN 12266-1
Fugitive emission TA-Luft, ISO 15848-1, API 641
Cleaning standard CGA G-4.1, ASTM A380/A380M, EIGA 33.06, Linde LS 141-47 part 1 and 2, Linde LS 031-6X7, Praxair GS-38, and GS-40.
Flange standard ASME B16.5
Weld ends ASME B16.25
Fire safe testing API 607, API 6FA, ISO 10497
Documentation EN 10204 type 2.2 (default) / 3.1 / 3.2

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