VP instruments Hot tap drill, Руководство пользователя

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Hot tap drill 8
© 2016 Van Putten Instruments BV | MAN-VP-ADRL-UK | Revision:1601 | Date:03-11-2016
6 Installation of a hot tap saddle
Check your hot tap saddle user manual for all the right details! This chapter provides
general rules only. Hot tap saddles need to be installed very carefully and on a
complete dry, oil free, smooth surface for a correct and safe installation. Always
pressure test the saddle before drilling a hole
Check if the outer diameter of the pipe matches the diameter range on the label of the hot tap
saddle (see table 1).
Make sure that the pipe where you want to install the hot tap saddle, is clean and has a smooth
surface; paint or coatings will not be a problem as long as the surface is clean, smooth and not
damaged. If necessary, use sandpaper, a brush or means, to clean and smoothen the surface.
Remove the nuts and rings from the saddle and remove the bracket.
Place the saddle on the pipe. Make sure that the rubber fits well with the pipe.
Place back the bracket on the saddle. The thread-ends go through the saddle, on which the rings
and nuts need to be mounted back. Both sides need to tightened equally.
Tighten the saddle by tightening the nuts equally. Tighten both sides up to 8Nm.
Perform a pressure test according to the Pressure Equipment Directive, or applicable local
legislation on pressure testing BEFORE drilling the hole.
Use gently the centre point of the hot tap drill kit and a hammer to centre the drill head in the 1”
fitting of the saddle.
Mount a 1” full bore ball valve on the hot tap saddle. Use 10 bar approved, liquid sealant to seal
the thread.