Boiler tube failure

kareem.021181 · **Posted:** Tue Feb 23, 2010 11:46 am

The boiler bank tubes are facing external corrosion on the bends (Bends are enclosed by refractory).Its free from internal corrosion.
Tube specification:
Material -- SA 210 A1
Outside Dia. -- 63.5 mm
Thickness -- 5 mm

We tried to do RFET(Remote field eddy current) but it is less sensitive to small volumetric defects.

Please refer a NDT method (By internal inspection) for a defect detection of even 1 mm from external side.

leem817 · **Posted:** Fri Feb 26, 2010 9:44 pm

Try bobbin coil.

leem

lordsteel · **Joined:** Wed Aug 10, 2011 4:20 pm **Posts:** 16

The only way is do PT/RT on the bends

Boiler tube failure

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