Manual

Ellipse® Pitot Tube Meter, AHL Annular High Pressure Hot Tap Meter
Page 4 April 2014
PIPE ORIENTATION AND SENSOR MOUNTING
Gas or Liquid
with Proper
Bleeding
10° 10°
FLOW
Field Weld
H L
SCH/WALL
MOD/
β
DIA/ID
CAP
DP
TAG
FLOW METERS
W/O
SCH/WALL
MOD/β
DIA/ID
CAP
DP
TAG
FLOW METERS
W/O
Liquid
10° 10°
FLOW
Field Weld
H L
SCH/WALL
MOD/β
DIA/ID
CAP
DP
TAG
FLOW METERS
W/O
SCH/WALL
MOD/β
DIA/ID
CAP
DP
TAG
FLOW METERS
W/O
Figure 2: Horizontal pipe installation
INSTALLATION INSTRUCTIONS, SINGLE SUPPORT
1. Choose the proper location to install the AHL Annular High Pressure Hot Tap Meter using AGA/ASME standards (or
equivalent). See Figure 2, Figure 5 and Figure 6.
2. Grind the surface of the pipe where the AHL Annular High Pressure Hot Tap Meter is to be inserted to provide a clean area
for welding.
3. Weld the supplied thread-o-let to the pipe using standard codes for your application (1/16 in. weld gap recommended).
Take care to protect the threads during the welding process.
4. Thread the close nipple into the weld connector. Install the supplied 3-piece isolating ball valve.
5. Mount the high pressure drilling machine onto the ball valve. Open the ball valve. Drill a hole through the pipe wall
according to Table 2.
Model/Sensor Weld Connector Drill Bit
AHL (7/8 in.) 1-1/4 in. 1-1/8 in.
AHL (1-1/4 in.) 1-1/2 in. 1-3/8 in.
Table 2: Single support drill bit size
OTE:N There is no need for a drilling machine if it is not a hot tap installation or if the system is not pressurized.
6. Withdraw the drill bit through the isolating ball valve, close the ball valve and dismantle the drilling machine. Make sure
there is no leakage at the valve and close nipple connections. The ball valve is to remain completely closed until step 9.
7. Install the cage nipple assembly and packing gland with the threaded rods assembly by threading it into the isolating ball
valve. Align the arrow on the sensor head with the direction of ow. See Figure 4 and Figure 5.