Nondestructive Testing service providers

  Levels of Certification AWS 1:2003 There are three levels of qualifications for welding inspector personnel. These levels are: AWI  – Associate Welding Inspector; WI  – Welding Inspector; SWI  – Senior Welding Inspector. 1.1)      Associate Welding Inspector (AWI): Shall be a  high school graduate , or hold a state or military  approved high school equivalency  diploma. Shall have a  minimum of two years’ experience  in an occupational function with a direct relationship to weldments fabricated to national or international standards and directly involved in one or more of the areas. 1.2)      Welding Inspector (WI):   Shall be a  high school graduate , or hold a state or military  approved high school  equivalency diploma. Shall have a  minimum of 5 years’ experience  in an occupational function with a direct relationship to welded assemblies fabricated to natio...

  Painting Inspection, Adhesion Test, QC Training, QC Course X Cut Test (This Document) Cross Cut Tape Test Method A  – X Cut Tape Test An X-Cut is made on the Dry Paint until the bare substrate , a pressure sensitive adhesion tape is applied over  the X cut and removed , the adhesion test is assessed between a scale of 0 to 5 . Instruments used: Sharp Razor Blade / Knife (The cutting edge to be in a good condition, Cutting Guide -Any scale to guide the knife to make straight cut Brush to clean after cut Adhesion Tape- Semi Transparent of Width 25mm or 1 inch. Rubber Eraser – on end of the pencil Torch Light or Lamp Test Procedure: Select an clean and defect free area for test (note: do not carry out test in extreme humidity and temperature) Make Two cross cuts of 40mm length with intersecting angle of 30 to 45 ° and the line should intersect in the middle, refer the image above , Use a torch light/ lamp to ensure that the cut has penetrated until the metal substrate, if ...

  Most field welding machines are portable, that is, they are on a truck and can be moved around. The welding equipment is usually a generator driven by a gasoline-powered engine and puts a DC current that may be reversed by changing the leads. The  welding machine  must contain a gauge or some means of determining the amperage output along with some method of increasing or decreasing the amperage as desired. The leads shall be in good condition with cleaned connections at both ends. Good quality electrodes are a must. Welding manufacturers produce good quality electrodes that conform to the AWS test requirements, however, this does not ensure their good quality when delivered to the job site. The welder should discard any damaged electrodes. When using low hydrogen electrodes, he/she must furnish them from undamaged hermetically-sealed containers and have an oven for maintaining their dryness. The welder’s cleaning tools should consist of a chipping hammer and a wire bru...

   Classification of welding electrodes consists of a prefix letter “E” specifying an electrode, a group of two or three digits specifying weld metal strength in ksi in the ‘as-weld’ or stress relieved condition, and a final two digits specifying type of covering, weld position and current characteristics. 1.  Nomenclature of electrode specification: E60xx – 60ksi (420MPa) E70xx – 70ksi (490 MPa) E80xx – 80ksi (560 MPa) E90xx – 90ksi (630 MPa) E100xx – 100 ksi (700 MPa) Exx10 – Cellulosic covering for the use with DC reversed polarity (E6010) – Deep penetration and all positions electrode for general purpose. Exx11 – Cellulosic covering for AC or DC., all position. (E6011) – Deep Penetration and thin slag, X-ray quality weld. Exx12 – Rutile covering AC or DC, all positions. (E6012) – Medium penetration, good choice for fit-up work. Exx13 – Rutile electrode, AC or DC, all position. (E6013) – Good performance in sheet metal welding. Exx14 – Iron powder rutile same character...