API 578

Quiz

1. Describe the definition of Alloy material.Answer: any material including welding filler materials that contain alloying elements such as Cr, Ni or Mo that are intentionally added to enhance mechanical or physical properties.

2. Mill test report can be considered a substitute for a PMI test.

A. True B. FalseAnswer: B

3. Material verification programme shall not include any construction weld joints since they are not the original pipe component.

A. True B. FalseAnswer: B

4. It is very important to identify the material by visual stamps/markings, so it is considered as one important component of an overall quality assurance program.

A. True B. FalseAnswer: A

5. List out several primary PMI test methods.Answer: Portable X-ray fluorescence, Portable optical emission spectrometry, Chemical laboratory chemical analysis

6. Can portable X-ray fluorescence method detect carbon content? Answer: No

7. During plant turnaround, a section of pipe needs to be confirmed for its C content, which is the most suitable PMI test method?

A. Portable X-ray FluorescenceB. Portable Optical Emission SpectrometryC. Chemical Laboratory Chemical AnalysisAnswer: B

8. One weldment which joining A106 and A312 type 316L pipe spool together, was tested by portable X-ray fluorescence method. The result showed only 9% of Cr content, shall we reject this weld joint?

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Answer: We shall reject this weld joint since the Cr content is less than 12% which will not provide the corrosion resistance feature by comparing with the base metal.

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