Flowserve BK 27N - Manual (Page 10)

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Installation
continued
Attention
n
Only qualified welders certified e. g. according to DIN EN 287 may weld the steam trap
into pressurized lines.
n
Do not insulate the steam trap.
A subsequent heat treatment of the welds is not required provided that the pipe is made from a
material similar to that used for the steam trap.
If, however, heat treatment is necessary, make sure that the treatment is limited to the area
immediately around the weld. Should this not be possible remove the bimetallic regulator before
carrying out the heat treatment.
Heat treatment of welds
. Take care of correct position of installation.
2. Take care of flow direction. The flow arrow is on the trap body.
. Consider space required for opening trap. When the trap is installed a minimum space of
100 mm
is required for removing the cover C.
4. Remove plastic plugs. They are only used as transit protection.
5. Clean butt-weld ends.
6. Arc-weld trap only manually (welding process  and 4 in accordance with DIN EN 2406)
or use gas-welding process (welding process  in accordance with DIN EN 2406).
Butt-weld design