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.
![](https://cdn-ru.bitrix24.ru/b7836503/landing/e67/e67a3db59c49374582e97ca6ffe4cf2b/pustota_1x.png)
![](https://cdn-ru.bitrix24.ru/b7836503/landing/d55/d552541f22c4eba2887a641761379157/prikhvatka_4_2x_1x.png)
![](https://cdn-ru.bitrix24.ru/b7836503/landing/155/155c417073feeb3cdfe075e0f73a11dd/Snimok_1x.jpg)
![](https://cdn-ru.bitrix24.ru/b7836503/landing/dee/dee04f40ea89ad58026fd278d729caf2/pustota_1x.png)
![](https://cdn-ru.bitrix24.ru/b7836503/landing/482/482c6d53ddbc36a7839f8d6fdad09002/00xxkhx_v.2_15_1x.png)
positioning the welding gauge
- 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
![](https://cdn-ru.bitrix24.ru/b7836503/landing/8ac/8ac2a1e2539edcf1dc298ff5bb5f481c/30_1x.jpg)
˟ красным цветом выделен параметр, подлежащий измерению
measurement taking
- 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 '