Endress+Hauser Proline Prowirl 73 - Appendix; Permitted Limit Values for Molar Fractions of Individual Constituent Parts

Appendix Proline Prowirl 73
182 Endress+Hauser
13 Appendix
13.1 Permitted limit values for molar fractions of individual
constituent parts
Constituent part Standard molar fraction Extended application (reduced
accuracy)
Methane Min. 70% Min. 50%
Nitrogen Max. 20% Max. 50%
Carbon dioxide Max. 20% Max. 30%
Ethane Max. 10% Max. 20%
Propane Max. 3.5% Max. 5%
Butane Max. 1.5% Max. 1.5%
Pentane Max. 0.5% Max. 0.5%
Hexane Max. 0.1% Max. 0.1%
Heptane Max. 0.05% Max. 0.05%
Octane and above Max. 0.05% Max. 0.05%
Hydrogen Max. 10% Max. 10%
Carbon monoxide Max. 3% Max. 3%
Helium Max. 0.5% Max. 0.5%
Water Max. 0.015% Max. 0.015%
Secondary constituents and trace elements
Ethylene Max. 0.1% Max. 0.1%
Benzene Max. 0.05% Max. 0.05%
Toluene Max. 0.02% Max. 0.02%
Argon Max. 0.02% Max. 0.02%
Hydrogen sulfide Max. 0.02% Max. 0.02%
Oxygen Max. 0.02% Max. 0.02%
Non-specified constituents Max. 0.01% Max. 0.01%
Specific weight/ relative density 0.55 to 0.80 0.55 to 0.90
Gross calorific value 30 to 45 MJ/m3 20 to 48 MJ/m3
Pressure Max. 120 bar abs
Max. 120 bar abs
(AGA8-DC92 and ISO 12213-2:
max. 650 bar abs)
Temperature 263 to 338 K
263 to 338 K
(AGA8-DC92 and ISO 12213-2: 225 to
350 K)