9781605257938_ch18.pdf - This sample chapter is for review purposes only Copyright \u00a9 The Goodheart-Willcox Co Inc All rights reserved Chapter Weld

9781605257938_ch18.pdf - This sample chapter is for review...

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Objectives After completing this chapter, you will be able to: Identify areas that should be inspected by a GTAW welder. Recall the various types of nondestructive tests and their advantages and disadvantages. Recall the various types of destructive tests. Recall the tests used in weld integrity inspections. Identify the conditions that require dimensional repairs and the techniques used to make these repairs. Identify various types of surface defects and explain corrective actions for each type. Recall procedures for finding and repairing internal defects. Recall the preparation needed prior to making repairs. Summarize proper welding practices for repairs. Explain the need for postweld inspection and repair review. Key Terms bend tests corrosion tests cross section tests defect destructive tests discontinuity dye penetrant test ferrite test flaw fluorescent penetrant test gamma rays hardness tests hydrostatic test image quality indicator (IQI) macrotest magnetic particle test (MT) microhardness test microtest nick-break tests nondestructive examination (NDE) notch-toughness tests penetrameters penetrant test (PT) pressure tests quality control radiographic test (RT) temper beads tensile tests ultrasonic testing (UT) visual test (VT) X-rays Introduction Quality control is used throughout the welding industry to monitor the quality of the items produced. All manufactured items are made to specifications. Inspections must be made during and after the manufac- turing cycle to ensure that parts meet the requirements of the specifications. The American Welding Society has increased the requirements for a CWI (certified welding inspector) certificate to ensure that certificate recipients are capable of performing quality control. Quality control is not only important to ensure quality parts but also to ensure that the correct procedures are performed as efficiently as possible. The use of proper quality control measures help make a company as strong as possible in an increasingly competitive industry. 265 Chapter Weld Inspection and Repair This sample chapter is for review purposes only. Copyright © The Goodheart-Willcox Co., Inc. All rights reserved.
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266 Gas Tungsten Arc Welding Handbook Inspection Areas GTAW welders need to ensure that all aspects of the operation are performed correctly. At a minimum, welders should check the following areas: Base material is as specified. Joint design is as specified and within required tolerances. Filler metal type and size are correct. Required welding equipment is available and operating satisfactorily. Tooling has been adequately tested to determine that it will properly support the operation. Parts have been properly cleaned. Welder training or certification is sufficient for the weld operation.
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