Home / Catalog / FM Approved Interlocking Split Flanges / HDPE DIPS Flange Adapters / Page 2 HDPE DIPS Flange Adapters Showing 21–22 of 22 results Compare 24″ Factory Mutual (FM) Approved Carbon Steel Two-Piece Backing Ring to Fit High Density Polyethylene (HDPE) DIPS Pipe Read more Compare 24″ Factory Mutual (FM) Approved T-316L Stainless Steel Two-Piece Backing Ring to Fit High Density Polyethylene (HDPE) DIPS Pipe Read more ← 1 2 Request Information