Welding types

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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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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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Discontinuities in Ultrasonic Testing in NDT

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 This blog will discuss types of discontinuities that can be evaluated with the ultrasonic testing in NDT method. Discontinuities can be divided into three general categories inherent, processing and service Inherent discontinuities are usually formed when the metal is molten. Inherent wrought discontinuities relate to the melting and solidification of the original ingot before it is formed into slabs, blooms and billets. Inherent cast discontinuities relates to the melting, casting and solidification of a cast article. Usually caused by inherent variables such as inadequate feeding, gating, excessive pouring temperature or entrapped gases. Processing discontinuities are usually related to the various manufacturing process such as machining, forming, extruding, rolling, welding, heat treating and plating. Service discontinuities are related to the various service conditions such as stress, corrosion, fatigue and erosion. During the manufacturing process, many d...
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