Page 121 - Praxair - Specialty Gases and Equipment Reference Guide

Methane

Balance (M)SDS (M)SDS Regulator Page
Gases Range Recommendations
Air 1 ppm - 2.5% P-18-0101 Single Stage PRS40023331-CGA E •245
Argon 0.1 ppm - 10% P-18-0097-B Two Stage PRS40123331-CGA E •244
10.1 - 50% P-18-0128-A Line PRS40052001-000 E •246
Helium 1 ppm - 10.1% P-18-0098-A
10.2 - 49.9% P-18-0129-A
Hydrogen 1 ppm - 50% P-18-0116
Nitrogen 0.1 ppm - 14.3% P-18-0110-B
14.31 - 49.9% P-18-0506

Balance Concentration CGA Praxair Grades* Cylinder Pressure Contents
Gas Range E N M P C U Style psig ft 3 m 3
Air 0.1 ppm - 2.5% (1)(2) 590 • • • • • • AS 2000 146 4.10
• • • • • • AQ 2200 84 2.40
• • • • • • A3 2200 32 0.90
• • • • • • K 2000 215 6.09
• • • • • • Q 2000 72 2.04
L.E.L. 5% • • • • • • G 2000 36 1.02
Argon 0.1 ppm - 50% 350 • • • AS 2000 153 4.33
(1)
• • • AQ 2200 89 2.52
• • • A3 2200 33 0.93
• • • K 2000 226 6.40
• • • Q 2000 75 2.12
• • • G 2000 38 1.08
Helium 0.1 ppm - 50% 350 • • • AS 2000 135 3.82
(1)
• • • AQ 2200 78 2.21
• • • A3 2200 29 0.82
• • • K 2000 199 5.64
• • • Q 2000 67 1.90
• • • G 2000 34 0.96
Hydrogen 0.1 ppm - 50% 350 • • • AS 2000 133 4.10
(1)
• • • AQ 2200 77 2.40
• • • A3 2200 29 0.90
• • • K 2000 196 5.55
• • • Q 2000 65 1.84
• • • G 2000 33 0.94
Nitrogen 0.1 ppm - 50% (1)(2) 350 • • • • • • AS 2000 142 4.02
• • • • • • AQ 2200 82 2.32
• • • • • • A3 2200 31 0.88
• • • • • • K 2000 209 5.92
• • • • • • Q 2000 70 1.98
• • • • • • G 2000 36 1.02
(1) For concentrations above 50%, the (M)SDS for the inverse mixture applies (i.e. Argon in Methane).
(2) Available concentrations for NIST traceable mixtures to be determined by available reference materials.
* Key for Praxair Mixture Grades (Refer to page C •92 for complete specification details.)
EPA (E), Primary Master (PM), Certified Master (CM), Primary Standard (P),
Section C – Mixtures
Certified Standard (C), Non-Certified Standard (U)

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