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General Welding Guidelines - MCAA

General WeldingGuidelinesNational Certified Pipe Welding BureauGeneral Welding Guidelines National Certified Pipe Welding Bureau Revision date: April 2, 2013 2013 National Certified Pipe Welding Bureau 1385 Piccard Drive Rockville, MD 20850 301-869-5800 Fax: 301-990-9690 The National Certified Pipe Welding Bureau (NCPWB) gratefully acknowledges the permission from ASTM to use their data on copper tube sizes in this publication. CONTENTS MANDATORY PRACTICES General .. 3 Joints .. 3 Filler Metal .. 3 Postweld Heat Treatment .. 4 RECOMMENDED PRACTICES General .. 5 Joints .. 5 Electrodes and Filler Metals .. 8 Preheating and Interpass Temperature .. 9 Shielding and Backing Gas .. 10 Cleaning .. 13 Environmental Requirements .. 14 Welding Technique .. 14 Welding From Two Sides .. 15 Visual Examination.

backing ring or strip, or it shall be weld metal deposited by ... End preparations shall be in accordance with the details provided in the construction drawing(s), or as provided on ... root gap spacing given in the WPS. The inside surfaces shall be …

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