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. Also available in T-304L stainless steel.

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” 3572-SFP 2.07” 4-1/4” 9/16” 3-1/8” 4 5/8” 1
1-1/2” 3592-SFP 2.94” 5” 9/16” 3-7/8” 4 5/8” 2
2” 2682-SFP 3.46” 6” 9/16” 4-3/4” 4 3/4” 3
2-1/2” 1822-SFP TBD 7” 9/16” 5-1/2” 4 3/4” 4
3” 1722-SFP 4.65” 7-1/2” 9/16” 6” 4 3/4” 5
4” 1492-SFP 5.94” 9” 9/16” 7-1/2” 8 3/4” 6
6” 1262-SFP 7.82” 11” 9/16” 9-1/2” 8 7/8” 8
8” 1442-SFP 10.15” 13-1/2” 9/16” 11-3/4” 8 7/8” 12
10” 1502-SFP 12.55” 16” 9/16” 14-1/4” 12 1” 15
12” 1522-SFP 14.71” 19” 9/16” 17” 12 1” 23
14” 1842-SFP TBD 21” 9/16” 18-3/4” 12 1-1/8” 26