scope:

This standard describes manual, semiautomatic, and automatic field welding by the metal arc-welding processes for steel water pipe manufactured in accordance with ANSI*/AWWA C200, Steel Water Pipe-6 In. (150 mm) and Larger. This standard describes field-performed full circumferential welding of three types of pipe joints: (1) lap joints, (2) butt joints, and (3) butt-strap joints. This standard also applies to other welding required in field fabrication and installation of specials and appurtenances. However, when possible, pipe fabrications and fittings should be performed by the manufacturer at a manufacturing facility. The design of field-welded joints is not covered within this standard.

This standard recognizes AWS^† D1.1 as the supporting document. ANSI/AWWA C206 references subclauses within the AWS D1.1 clauses on Prequalification of WPSs, Qualification, Fabrication, Inspection, and Tubular Structures. When ANSI/AWWA C206 is silent regarding a requirement listed in AWS D1.1, such requirement is not required in ANSI/AWWA C206. Although AWS D1.1 supports ANSI/AWWA C206 in many sections, when there is a conflict between these documents then ANSI/AWWA C206 shall govern.

Welding of gasketed joints may require modification to the parameters of this welding standard.

Purpose

The purpose of this standard is to provide minimum requirements for field welding and inspection of steel water pipe.

^* American National Standards Institute, 25 West 43rd Street, Fourth Floor, New York, NY 10036.

^† American Welding Society, 8669 NW 36 Street, No. 130 Miami, FL 33166.