Endress+Hauser Deltatop DP71B, Руководство по эксплуатации

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Deltatop DP71B, DP72B, DP73B Installation
Hauser 33
3.15 Basic instructions regarding drilling a hole in the pipe
without stopping the process (hot tapping)
3.15.1 Initial notice
• While drilling a hole in a pipe without stopping the process offers advantages to users, some risks
are associated with this procedure. Therefore take all the necessary safety measures before
operating.
• The following information only constitutes a general description. The steps to be followed can
vary between flowtap Deltatop versions.
• The following description does not explain how to use a hot tap drilling machine. Therefore, refer
to the manual of the hot tap drilling machine itself.
3.15.2 Procedure
1. The first step is to determine the wall thickness of the pipe (an ultrasonic thickness tester may
be used).
2. Mark the location where the Deltatop is to be mounted.
3. Position the welding socket over the center of the mark.
4. Tack-weld the welding socket into position by using the appropriate weld gap.
!
Note!
In the case of a flange, note the orientation of the flange. The bolt holes on the flange must be
at 45° angles (for four holes) or 22.5° angles (for eight holes) to the pipe axis.
P01-DP6xxxx-17-xx-xx-xx-003
5. Finish welding the welding socket to the pipe as per the applicable codes.
6. Install the access valve correctly.
7. Verify that the access valve is properly tightened because it will not be serviceable beyond this
point without depressurizing the line.
8. Attach an appropriate hot tap drilling machine to the access valve.
9. Follow the instructions given by the hot tap drilling machine.
10. Place the access valve in the full open position and drill a hole in the pipe.
11. Once the hole has been made, close the access valve and properly remove the hot tap drilling
machine. Follow the instructions given in the manual for the specific flowtap Deltatop model
that you have.
4
5°
22
,
5°