Worksheet A.80.2
Ultrasonic Flowmeter:
The USM GT-400 is generally applicable and designed for the use with hydrogenous natural gas up to 30 mole% hydrogen. For custody transfer measurements, the USM GT-400 is suitable and approved for the use with natural gas up to a maximum hydrogen content of 30 mole% in accordance with the German TR-G19. The reason for this general restriction in the TR-G19 is that there are currently no officially approved test rigs in Germany for calibrating meters with hydrogenous gases.
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