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Measurement of the root height layer/ tact weld imperfection

Root height layer/tact weld imperfection - the amount of penetration of the base metal when welding the root layer of a multi-pass seam. 

  • Set the welding gauge at the zero position. 
  • Pull the fillet arm 2 out of the main gauge plate 1, matching the mark with a value corresponding to the diameter of the pipe being monitored. 
  • Fix and lock the stop position by tightening the fillet arm rivet 6. Position the welding gauge on the test object. 
  • After rearranging the pivots in the groove located on the right side of the welding gauge, adjust them until they come into contact with the inspected object. 
  • Lock the pivots in this position as shown by the illustration

˟ красным цветом выделен параметр, подлежащий измерению

  • Adjust the linear member 3 so that the taper gauge 5 is above the point of measurement.
  • Lower the top High-Lo arm 4 until the taper gauge 5 makes contact with the surface of the inspected object at the point of measurement. 
  • Take the value of the parameter w from the horizontal scale W, and subsequently for the parameter h – take the readings from on the vertical scale H. 
  • To obtain the desired parameter sk : - use a calculator to calculate the value of h ' - measure the difference between the values of the nominal thickness s and h '

Using  a calculator, you can determine the desired value of the from the measured parameters