The equal cross is one kind of the pipe cross, just like a equal tee, the equal cross means all the 4 ends of the cross are in same diameter. Materials Carbon steel: ASTM/ASME A234 WPB-WPC Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911 Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N ASTM/ASME