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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 .. 16 Repairs .. 18 Stamping of Welds .. 19 Safety .. 19 Welding Hazards .. 20 Welding Lens Shades.

Certified Pipe Welding Bureau Welding Procedures Specifications (WPSs). This document is divided into two sections: Mandatory Practices and Recommended Practices. The “Mandatory Practices” are in addition to the instructions provided on the WPS and are considered part

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