The tank shall be a single wall construction conforming to ASTM A240, type 304 stainless steel or carbon steel. Welding will be in accordance with AWS D1.1 to provide a watertight tank that will not warp or deform under load. Pipe connections to the exterior shall be as follows:
Pipe Connections
All connections 3″ and smaller are FNPT couplings. All connections 4″ and larger are raised face flanges with ANSI 150 pound standard bolt circle. Use flanged piping connections that conform to ANSI B16.5.