Shurjoint grooved-end reducing tees are made of ductile iron per ASTM A536 Gr. 65-45-12 and or ASTM A395 Gr. 65-45-15. C-E dimensions are manufacturer's standard.
For sizes larger than 14” (350 mm) are fabricated from standard weight (0.375” or 9.5 mm) carbon steel pipe to ASTM A234 GR. WPB or segmentally welded with carbon steel of the same or equivalent grade. C-E & C-B dimensions conform to ANSI B16.9.