Welding types

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Acceptance Criteria for Liquid Penetrant Testing -LPT

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  Acceptance Criteria for Liquid Penetrant Testing -LPT as per ASME , AWS and API standards Liquid penetrant testing  simply called as PT. Sometimes Dye Penetrant Testing is a surface defect detection NDT  method and is more sensitive to all kind of surface defects, such as cracks , porosity, hot tears, laps, etc. The NDT methods are trained by NDT Training Institutes with their NDT courses, and the LPT is one among the basic Non Destructive Testing Methods. Various international standards for Liquid Penetrant Testing are as below ASME Boiler and Pressure Vessel Code BPVC- Section V – Article 6 and Article 24 ASTM E-1417 (ASTM Standard) ASTM E-165 (Penetrant Testing Standard for general Industry ASTM Standard) ISO 3452-1 (ISO Standard) SAE AMS 2644 (Aerospace Standard) AS 2062 (Australian Standard ) DIN EN 571 The Indications are evaluated as per Clients Acceptance Criteria or the Product Standard in conformance with the clients acknowledgement . Few examples of product s...
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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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