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Daniel 3818 LNG Liquid Ultrasonic Meter Installation Manual Section 2: Mechanical installation
3-9000-771Rev A May 2012
Mounting requirements in Liquefied Natural Gas pipelines 31
2.6 Mounting requirements in Liquefied Natural Gas
pipelines
The ambient operating temperature of the Daniel 3818 LNG Liquid Ultrasonic Flow Meter
electronics (i.e. Flameproof enclosure and Intrinsically safe base enclosure) is -40
o
C (-40
o
F) to
+60
o
C (+140
o
F). The 3818 LNG Liquid Ultrasonic Flow meter electronics are remote mounted
on a vertical or horizontal two (2) inch pipe which is securely installed and rigid.
install sufficient insulation over the meter assembly, shrouds and adjoining upstream and
downstream piping. The thickness and type of insulation used is to be determined by the
customer for the ambient conditions. For accurate flow meter operation the liquefied natural
gas fluid flowing within the meter must be liquid without any gas pockets or bubbles. The
insulation installed must be adequate to insure bubble free liquid flow is achieved at all flow
rates and ambient conditions.