Low alloy steel Golden joint root NDT

[Karuppa Samy]

Dear All,

How can we do root NDT for low alloy (HS service) steel golden, while doing continuous preheat ( 300°C) and can you recommend suitable NDT methods.

Regards

K. Karuppasamy,

[sridhar cn]

Dear Mr. Kuppasamy,

At high temperatures, you can use UT (using specialized high temperature transducers and couplants 

for internal defects), Eddy Current Test (for surface & subsurface cracks), RT, MPT (with specially 

formulated high-temp inspection mediums for surface and subsurface) and PT ( high temp. penetrants are 

available  for use at 300 deg. C) for surface detections.

The selection  of the NDT method depends on factors like material type, weld configuration, inspection 

accessibility.

Sridhar.

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[yamuna ramesh]

You can select dry method dry powder MPO.