AWS- A4.2M:2006 Calibrating Magnetic Instruments (ISO 8249:2000 MOD)

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Calibration procedures are specified for a number of commercial instruments that can then provide reproducible measurements of the ferrite content of austenitic stainless steel weld metals. Certain of these instruments can be further calibrated for measurements of the ferrite content of duplex ferritic-austenitic stainless steel weld metals. Calibration with primary standards (nonmagnetic coating thickness standards from the U.S. National Institute of Standards and Technology) is the preferred method for appropriate instruments. Alternatively, these and other instruments can be calibrated with weld-metal-like secondary standards.  Reproducibility of measurement after calibration is specified. Problems associated with accurate determination of ferrite content are described. ISBN 0-87171-044-7

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API-M:2008 Study Guide for API Standard 1104, Welding of Pipelines and Related Facilities contains information on the use of API Standard 1104, Twentieth Edition, which will assist the student in preparing for using the standard as well as preparing for code-related examinations. Material is provided for each of the 13 sections of the standard and both appendices. Exercise questions and answers are provided for each topic. ISBN 978-0-87171-160-1 

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