Sierra INNOVA-MASS 240-VT, Инструкция по эксплуатации, Страница: 23 / 146

Chapter 2 Installation Sierra 240/241Series Instruction Manual
2-8 IM-240
Hot Tap Guidelines
Refer to a standard code for all pipe tapping operations. The following
tapping instructions are general in nature and intended for guideline pur-
poses only.
1.
Confirm that the installation site meets the minimum upstream and
downstream pipe diameter requirements.
2.
Weld a two inch mounting adapter on the pipe. Make sure the mount-
ing adapter is within ± 5° perpendicular to the pipe centerline (see
previous page). The pipe opening must be at least 1.875 inches in di-
ameter.
3.
Connect a two inch process connection on the mounting adapter.
4.
Connect an isolation valve on the process connection. The valve’s full
open bore must be at least 1.875 inches in diameter.
5.
Run a static pressure check on the welds. If pressure loss or leaks are
detected, repair the joint and re-test.
6.
Connect the hot tapping equipment to the isolation valve, open the
isolation valve and drill at least a 1.875 inch diameter hole.
7. Retract the drill, close the isolation valve, and remove the hot tapping
equipment.
8. Connect the flow meter to the isolation valve and open the isolation
valve.
9. Calculate the sensor probe insertion depth and insert the sensor probe
into the pipe as described on the following pages.
Warning!
Hot tapping must be
performed by a trained
professional. US. regulations
often require a hot tap permit.
The manufacturer of the hot
tap equipment and/or the
contractor performing the hot
tap is responsible for provid-
ing proof of such a permit.
Warning!
All flow meter connections,
isolation valves, and fittings
for hot tapping must have the
same or higher pressure
rating as the main pipeline
.