Nondestructive Testing service providers

  Fillet Weld Positions The advantage of the fillet-welded joint is that it’s unnecessary to prepare the edges of the plates or sheets for welding. Double fillet-welded joints are an improvement over single-fillet joints because they can withstand loads from more than one direction. Three of the five basic types of joints –  the lap, the T-joint and the corner joint  – can be joined with fillet welds. Flat Fillet Weld Position – 1F The axis of the flat position fillet weld is either horizontal or inclined not more than 15° to the horizontal. The surfaces of the plates are each inclined at about 45° to the horizontal. The face of the weld is on top. The typical flat-position fillet weld is similar to the flat-position groove weld. The difference is in the positions of the plates forming the joint. Horizontal Fillet Weld Position – 2F In this position, both the axis of the weld and the lower plate of the joint assembly are horizontal. For the  T-joints and inside corne...

  Standards for Welding Positions : It is very important for the Weld Inspector  to know the position , or location of a joint relative to the horizon, because it may determine what welding process, methods, and techniques can be used. Welding is usually easiest when the welder can work on a joint located on a flat, horizontal surface, such as on a table or bench. However, joints in the field may be located in a variety of positions relative to the welder and to the horizon, as shown below.  1)  Welding positions – AWS D1.1, European Welding Standard EN 287 – 1, ASME IX: 2) Welding Positions – Butt, Fillet and Piping Welds: Flat Butt Weld Position – 1G In this position, the axis line of the weld must  not incline more than 15°  from the horizon and the face of the weld must be on top. Welders often refer to the flat-position welding by the nonstandard term  downhand welding. Horizontal Butt Weld Position – 2G In this position, both plates are perpendic...

  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 type and hole type, ASTM standards and ISO standard, 6) Lead letters , alphabets and numbers 7) RT weld Film viewers (with intensity control ) 8) Set of developed films 9) Film Densitometer 10 ) Dark room set up for developing, with seperate tenks for Developer, Stoper, Fixer & Rinsing ( only if required) Computed Radiography: Phosphor plate with lead screens and casette CR Scanner and Computer Digital Radiography: Requires a Fixed Digital Radiography Machine Inbuilt X-Ray tube of capacity 150kV upto 400 kV Inbuilt sample positioning system Flat panel detector External control console Computer. ( There are local manufacturers for Digital XRay machine ) Magnetic Particle Testing (MPI): 1) MPI Electromagnetic ...

  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...

  The below are the brief of the QC Course Content for Engineers and mechanical Engineers. The program is additional course for Mechanical Engineers which prepare them for expertise in field of mechanical engineering , and quality control and quality assurance department. The  QC Course Content are:- Introduction to Quality Assurance and Quality Control Knowledge of Standards for Welding Engineering Fabrication Drawing Welding Process and Welding Equipments Weld Symbols Weld Inspection Process Non Destructive Testing – NDT Destructive Testing / Mechanical Testing Types of Steels and Metals Welding Electrodes Selection Welding Failures Welding Procedure Specification – WPS Welder Qualification or Welder Certification Leak Testing (Hydro Test / Pneumatic Test/ Vacuum test, Helium Leak test, etc.) Tanks, Pressure Vessels, Heat Exchanger, Valves , Pressure Relieving Devices and Piping, ISO Documents and Advanced Quality Management Systems Safety Surface Preparation and Painting In...

  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 is found plentiful resource than next to aluminium. What makes cast iron an important material? It is a cheap metallurgical substance. Good mechanical rigidity and good strength under compression. Easy castablility. Good machinability can be achieved when a suitable composition is selected. Composition : Carbon – 3.0 to 4.0% Silicon – 1.0 to 3.0% Manganese – 0.5 to 1.0% Sulphur – upto 0.1% Phosphorus – upto 1.0% Influence of cooling rate on the properties :   Types : Grey (General purpose) White (Hard & Wear resistant) Malleable (Heat treated for ductility) Spheroidal Graphite (Some ductility) Grey Cast Iron: It is the least expensive & the most common type of cast iron. It is an alloy o...

  Quality Assurance Glossary This blog gives you the abbreviations and definitions of terms used in quality Assurance department. Abbreviations The following abbreviations apply to this Project Quality Plan: BOM                         Bill of Material CAV                          Characteristic Accountability and               Verification CAR                          Corrective Action Request CAPA                       Corrective Action ...