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NDT applicable for tube to tubesheet weld joints
- Thread starter virjil
- Start date
The most strigent requirements that I have seen has specifed Helium Mass Spectrometry Leak Testing of Tube to Tubesheet welds.
The least strigent requireed an Bubble Test.
Though MT & Liquid Penetrant is widely used.
Vita sine litteris mors est.
The least strigent requireed an Bubble Test.
Though MT & Liquid Penetrant is widely used.
Vita sine litteris mors est.
Here the ways and means test the tube to tube sheet joint as well as verifying the roll.
Page 42 tube gauge. This catalogue has a lot of good information about installing Hx tubes.
Page 42 tube gauge. This catalogue has a lot of good information about installing Hx tubes.
You can use a lot of methods.
It´s necessary to know some details, like:
- Use: requeriments are different depending of the use. Power plant pipng has higer requeriments that water-treatment plant (pressures, tempratures......)
- kind of joint: For groove welds you only can aplly RT and UT testing (volumetrics). If don´t need a complete penetration, you can use MT or PT (surface).
- Material: In non ferrous material (aluminium or PE))you can not carry out MT testing. I imagine tube is manufactured in steel (maybe ASTM A-106)
- Thickness: With 0,32 inch. or less you can not use UT testing.
- Leak testing is indicated to asure watertightness
If that tube hasn´t high requeriments, PT is the best.
It´s necessary to know some details, like:
- Use: requeriments are different depending of the use. Power plant pipng has higer requeriments that water-treatment plant (pressures, tempratures......)
- kind of joint: For groove welds you only can aplly RT and UT testing (volumetrics). If don´t need a complete penetration, you can use MT or PT (surface).
- Material: In non ferrous material (aluminium or PE))you can not carry out MT testing. I imagine tube is manufactured in steel (maybe ASTM A-106)
- Thickness: With 0,32 inch. or less you can not use UT testing.
- Leak testing is indicated to asure watertightness
If that tube hasn´t high requeriments, PT is the best.
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