Nondestructive Testing service providers

  Weld crack   1.1. Cracking: If a weld crack is found, it must be removed and magnetic-particle inspection performed to ensure every point has been removed before re-welding. Weld Crack can occur on top of a weld bead, within the weld, or in the base metal. GMAW electrode wires are low hydrogen in content and have no flux coating to attract moisture, can help avoid cracking in the weld and heat-affected zones, if kept clean and dry. Spools or reels must be free of moisture both while being used and when being stored. A crack can easily occur on welding of aluminum, due to metal contraction as the weld pool cools, while the base metal remains hot. Cracks may be more numerous with aluminum, but they may also occur in stainless steel and galvanized materials. Cracks may occur if excess heat input is used for the particular thickness of material being welded, or steels with high carbon content, over 30 %, are likely to crack due to their hardness. Spatter: If there is a lot of sp...

  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...

  TASKS DURING WELDING OPERATIONS Welding inspection during welding operations should include all the audit parameters to verify that the welding is performed to the procedures. Such tasks may include the following: Quality Assurance Establish a quality assurance and quality control team with the welding organization. Quality control items to assess: Welder is responsible for quality craftsmanship of weldments. Welder meets qualification requirements Welder understands welding procedure and requirements for the work. Special training and mock-up weldments performed if required. Welder understands the inspection hold-points. Potential inspector actions: Review welder performance with welding organization as below Welding Parameters and Techniques Confirm welding parameters and techniques are supported by the WPS and WPQ. Quality control items to assess: 1.Essential variables are being met during welding. Filler material, fluxes, and inert gas composition/flow rate. Purge technique, ...