This line of MARZOLF™ Two-Piece Backing Rings is designed to reinforce molded fiberglass flanges. These split flanges provide the ability to use greater bolt torque and increase the pressure capability of fiberglass piping. Available in a variety of protective coatings, including electro-zinc plating and e-coat epoxy coating.

Size (in inches) Part No Inside Diameter I.D. Outside Diameter O.D. Thickness T. Bolt Circle B.C Holes H.D. No. Holes H.D. Dia Weight Each Lbs.
1” 357-SFP 2.07” 4-1/4” 9/16” 3-1/8” 4 5/8” 1
1-1/2” 359-SFP 2.94” 5” 9/16” 3-7/8” 4 5/8” 2
2” 268-SFP 3.46” 6” 9/16” 4-3/4” 4 3/4” 3
2-1/2” 182-SFP TBD 7” 9/16” 5-1/2” 4 3/4” 4
3” 172-SFP 4.65” 7-1/2” 9/16” 6” 4 3/4” 5
4” 149-SFP 5.94” 9” 9/16” 7-1/2” 8 3/4” 6
6” 126-SFP 7.82” 11” 9/16” 9-1/2” 8 7/8” 8
8” 144-SFP 10.15” 13-1/2” 9/16” 11-3/4” 8 7/8” 12
10” 150-SFP 12.55” 16” 9/16” 14-1/4” 12 1” 15
12” 152-SFP 14.71” 19” 9/16” 17” 12 1” 23
14” 184-SFP TBD 21” 9/16” 18-3/4” 12 1-1/8” 26