Flowserve BK 37 - Manual (Page 11)

Installation
– continued –
Attention
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Only qualified welders certified e. g. according to DIN EN 287 may weld the steam trap
into pressurized lines.
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Do not insulate the steam trap.
After welding the steam trap in place a heat treatment of the welds is required (stress-relief annealing
to DIN EN 00529). The heat treatment must be restricted to the immediate area of the welds. Remove
the regulator as described under Maintenance 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.
3. Consider space required for opening trap. When the trap is installed a minimum space of
80 mm is
required for removing the cover A.
4. Remove plastic plugs. They are only used as transit protection.
5. Clean butt-weld ends.
6. Arc-weld trap (welding process and 4 in accordance with ISO 4063) or use gas-welding
process (welding process 3 in accordance with ISO 4063).
Butt-weld design
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Spanner A.F. 24 mm, DIN 33, form B
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