Tube to tube sheet welding Code issues

[Metallurgistrbi]

Hello there,

We are doing a TTS WPS PQR for cladded Tube sheet(8mm SS with Carbon steel 122mm- Welding on cladded side partial groove in tubesheet 1.5 mm depth only) & SS tube(2.1mm thick) . The client specifies that "All TTS to be tested as per QW 193". so QW288, QW250 requirements kick in. My question is when does the requirement in QW-217 is mandatory. Because if the PQR is Tested with QW 193 requirements then is it mandatory to do Mechanical testing & Bend test as mentioned in Method A of QW-217.

If in case , The TTS weld considered as seal weld is QW-217 mandatory too?...

Thanks in advance for your replies and information.

 

[EdStainless]

I have never seen mechanical testing on seal welds, but I can't tell you how that is handled in the Code.

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