CWI实操 VIW.ppt

VISUAL INSPECTION WORKSHOP Introduction Review Slides - Introduction Review AWS B1.10, B1.11, and VIW Manual Examine Metal Weld Samples Review AWS Part B Specification Review Plastic Weld Replicas Practice Use of Hand Tools Practice Exercise and Review Practical Exam and Review VISUAL INSPECTION WORKSHOP Introduction Visual Inspection (VT) is the Basic Element of any Quality Control System. It must be done, however, by Trained Personnel. VISUAL INSPECTION WORKSHOP Introduction “It has been shown repeatedly that an effective program of Visual Inspection (VT), conducted by properly trained personnel, will result in the discovery of the vast majority of those defects which would otherwise be discovered later by some more expensive nondestructive test method.” VISUAL INSPECTION WORKSHOP Introduction While VT is limited to the visible, external surfaces only, it should be recognized that the external surfaces of the components most often see the highest stresses in service, and are most often the more critical portions of the components. VISUAL INSPECTION WORKSHOP Introduction VT Is Very Cost Effective …. Relatively Simple To Perform Minimal Equipment Required Problems Found As They Occur Early Repairs Easier To Accomplish VISUAL INSPECTION WORKSHOP Introduction For Welding Inspection, VT Must Be Applied: Before Welding During Welding After Welding VISUAL INSPECTION WORKSHOP Introduction Organizing The Inspection Effort …. Become Familiar w/ Welding Requirements Specify Timing for Inspections Develop Appropriate ‘Hold Points’ Develop Applicable VT Techniques Develop Repair/Re-Inspection Procedures Develop Procedure for Reports and Maintenance of Records VISUAL INSPECTION WORKSHOP Introduction Hold Points - Points in the Fabrication Sequence where Inspection must be Performed Before Fabrication can continue. VISUAL INSPECTION WORKSHOP Introduction Applying The Inspection Effort ‘Before’…. Welding Equipment - Type, Suitability Filler Metals - Type, S