NDT applicable for tube to tubesheet weld joints

[virjil]

What is the industry-accepted NDT for a finished strength welded tube to tubesheet weld joint?

 

[metengr]

Industry-accepted really refers to user or engineering firm nondestructive testing criteria. Either wet fluorescent MT or Liquid Penetrant test methods, depending on base materials and weld metal

 

[eyec]

is this for inservice or fab shop?

fab shop could use vacuum testing.

 

[sk10009]

We applied RT to tube to tube sheet weld metal.
the position of RT source is tube inside and
film specially manufacted is locatited in tube edge.

 

[Rich2001]

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.

 

[unclesyd]

Here the ways and means test the tube to tube sheet joint as well as verifying the roll.

http://www.expansionseal.com/html/hepg7.htm

http://www.hpro.com/products/hproof.html

Page 42 tube gauge. This catalogue has a lot of good information about installing Hx tubes.

http://www.elliotttool.com/E-100.pdf

 

[SERJI]

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.