Dish Radius is equal to 150% of Diameter
Knuckle Radius ranges from 3/4" - 3" (depending on diameter)
Diameter
Dish Radius Knuckle Radius Max. Straight Flange Material Thickness
12" - 24" 150% of Diameter 3/4", 1-3/8", 2" 1/2"
12 gauge - 3/16" Plate
25" - 33" 150% of Diameter 3/4", 1-3/8", 2" 1" 12 gauge - 1/4" Plate
34" - 60" 150% of Diameter 3" 1" 12 gauge - 5/16" Plate

General Notes:

All heads manufactured from Stainless Steel, Hastelloy™, and other Nickel Alloys
All available polished ID/OD from 80 Grit to 400 Grit (less than 5 RA.)
Heads manufactured as ID, OD and any other dimension between whole numbers
Weld Preps include: Square Edge, ID or OD Bevel, ID/OD Bevel, ID or OD Bevel with land, ID/OD Bevel with Land, ID or OD Tapers with Bevel and Land