Welding types

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NDT on Shafts

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  Non Destructive Testing,NDT on Shafts is considered essential , because the shafts are mostly made as load bearing structures, any defects such as cracks will propagate more during acting of load and eventually will cause failure. The most possible defects in shafts are Cracks and Pipes , which is shown below The Non Destructive methods preferred for defect detection on raw material shafts are Ultrasonic Testing, Magnetic Particle testing / Eddy Current Testing / Magnetic Flux Leakage method. We have not discussed about other NDT methods such as Liquid Penetrant testing & Radiographic testing because for raw material inspection. These methods will be cost effective for raw material testing  ( i.e. most costly and labor intensive, also there is possibility of missing out the cracks in radiography testing due to orientation of crack ) The Defect wise identification method is given as below  , Internal Defect ( Piping ) – Ultrasonic Testing Surface Defects  (C rac...
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Fillet Weld Types

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  Fillet Weld Types: The  single-fillet-welded T-joints  are indicated from both the arrow side and the other side. The symbol for a  double fillet-welded T-joint  is also Note that the assembly of two T-joints welded pieces involves  four fillet welds  represented by  two double-fillet-weld  symbols. 2. Fillet Combined  The most common fillet weld in conjunction with a bevel- or J-groove weld. The fillet weld types can be added if the bevel- or J-groove weld is on a corner or a T-joint. 3. Fillet Weld Root Penetration.  Weld penetration beyond the depth of the groove is indicated below. The first dimension gives the depth of penetration into the groove; the second dimension gives the additional penetration into the joint. 4. Dimensioning Fillet Weld Symbols.  Take pattern on the desired sizes of fillet welds, because welders usually can’t determine the dimensions of the parts to be The drawings of the welded joints are shown o...
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Types of Weld Joints

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  Here we are going to see about two types of weld Joints Groove Welds Fillet Welds Dimensions 1.1.  Groove Welds: In the following figures, the perspective drawings of types of weld joints are shown at the left, looking at each joint from the arrow side. The illustrations cover only a small number of all possible symbols.  The symbols shown here are those of the most common manufacturing application. 1.2 Fillet Welds Dimensions: Dimensions of fillet welds must be shown on the same side of the reference line as the weld symbol. When fillet welds are indicated on both sides of a joint and no general note governing the dimensions of the welds appears on the drawing. OBS.:  If the dimensions of one or both welds differ from the dimensions given in the general note, both welds must be dimensioned. The size the fillet weld with unequal legs must be shown in parentheses to left of the weld symbol. 2. The length of a fillet weld, when indicated on the welding symbol, must b...
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