Home / Catalog / FM Approved Interlocking Flanges / HDPE IPS Flange Adapters & Stub Ends HDPE IPS Flange Adapters & Stub Ends Carbon Steel Fm Approved IPS Flange Adapters & HDPE Stub End Flange (11) Stainless Steel Fm Approved IPS Flange Adapters & HDPE Stub End Flange (11) Request Information