2500 Automatic Tank Gauge
52 Installation and Operations Manual
Inspection Hatch and Manhole Cover
Varec recommends the installation of a manhole or inspection hatch, if there is not already
one located within arm’s reach of the tape pipe location.
Inspection Hatch
1. Remove the cover to a safe welding location.
2. Cut a rectangular hole 6.00 inches x 15.75 inches (152 mm x 400 mm) in the cover.
3. Cut a 2.50-inch (63.5 mm) diameter hole in the cover to carry the tape drop pipe.
4. Cut two 1.75-inch (44.5 mm) diameter holes in the cover to carry the top guide cable
anchors.
5. Disassemble the inspection cover and gasket from the frame.
6. Weld the inspection cover frame to the manhole cover.
7. Weld the guide cable anchor nipples and the tape drop pipe coupling in place. Make cer-
tain that they are vertical and correctly centered.
8. Carry the modified cover assembly back to the tank site. Orient the modified manhole
cover as shown, and reinstall.
9. Refer to the appropriate tank configuration figure to check the tank configuration and
install the tape piping and gauge head.
Manhole Cover
This section gives instructions to install 226 20-inch and 24-Inch Manhole Covers with API
Drilling.
Install 226 20 inch (Part Number BM3443) and 24 inch (Part Number BM3607) manhole covers
with API drilling.
1. Remove the existing manhole cover.
2. Separate the 226 cover in two by removing the bolts.
3. Install the cover half with the pipe coupling to the top of the tank.
4. Refer to the appropriate tank configuration figure to check the tank configuration and
install the tape piping and gauge head.
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