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Thermal Treatments (Heat-Treating):
Heat-treating is a term used to describe all of the controlled heating and cooling operations performed on a material in the solid state for the purpose of altering its microstructure and/or properties. The major objectives of the different kinds of thermal treatments are: Soften…
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WELDING SYMBOLS
Elements of Welding Symbols: The first concepts the Welding Inspector must understand very well, are the welding symbols and how to interpret them on drawings. The reference line of the welding symbol, as shown below, is used to designate the type of weld to be…
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Non destructive Testing (NDT)- Common Methods
Non destructive Testing (NDT)- Common Methods are: Visual Inspection – VT Liquid Penetrant Testing – LT Magnetic Particle Testing – MT Radiographic Testing – RT Ultrasonic Testing – UT 1. Visual Inspection – VT: Visual inspection after welding is very useful in evaluating quality, even if…
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Recommendations for Welding
We would see about Recommendations for Welding of Structural Steel as per AWS D1.1 , 2020 revision Groove Weld: (Clause 4.4.1) Weld Length : shall be the width of the parts joined , perpendicular to the direction of compressive or tensile stress, Weld Size: Thickness of thinner…
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NONDESTRUCTIVE TESTING – Visual Inspection (VT)
The NDT (nondestructive testing) methods are: Visual Inspection – VT Liquid Penetrant Testing – LT Magnetic Particle Testing – MT Radiographic Testing – RT Ultrasonic Testing – UT Eddy Current Testing – ET (not used in field inspection) Acoustic Emission Testing – AET (not…
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Equipments and materials for NDT lab set up
Equipments and materials for NDT lab set up Radiography Testing: 1) X-Ray tube head -450 kV capacity ( only if construction of a exposure room with approval from government is possible) 2) RT Films (D4 ) 3) lead screen 0.125mm, 0.25 mm 4) Film casettes 5) set of IQI -wire…
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Acceptance Criteria for Liquid Penetrant Testing -LPT
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…
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Cast Iron and Its Types
What is a cast iron? Cast iron are ferrous alloys with greater than 2% carbon. They also contain small amounts of other materials such as silicon, sulphur, manganese, & phosphorous. In general it consists alloys of carbon & iron. They are the least expensive of all metals and…
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