Manual

User Manual
Page 5 April 2014
8. Install the instrument valves (optional) at the pressure connections on the AHL Annular High Pressure Hot Tap Meter
sensor head. Make sure the valves are fully closed before proceeding.
9. Open the isolating ball valve. Insert the AHL Annular High Pressure Hot Tap Meter sensor into the pipe. Use a wrench to
turn the threaded insertion rods clockwise until the sensor reaches the opposite pipe wall.
10. Connect the instrument lines to the sensor head valves, then to a gage or transmitter.
SCH/WALL
FLOW METERS
W/O
H L
FLOW
Field Weld
H L
SCH/WALL
MOD/
β
DIA/ID
CAP
DP
TAG
FLOW METERS
W/O
FLOW
Figure 3: Sensor alignment
INSTALLATION INSTRUCTIONS, DOUBLE SUPPORT
1. Follow steps 1 through 6 in “Installation Instructions, Single Support” on page 4. At 180° from and on the same plane
as the previously drilled hole, grind the surface of the pipe to provide a clean area for welding. Drill a hole and de-burr,
especially on the inside of the pipe. The hole used for the double support should be sized according to Table 3.
Model/Sensor Weld Connector Drill Bit
AHL (7/8 in.) 1/8 in. 3/8 in.
AHL (1-1/4 in.) 1 in. 7/8 in.
Table 3: Double support drill bit size
2. Weld the double support thread-o-let, making sure that it is centered with the drilled hole (1/16 in. weld
gap recommended).
3. Install the AHL Annular High Pressure Hot Tap Meter sensor through the two holes. Make sure that the double support pin
passes through the guide ring. See Figure 4.