For the PP-lined Malleable Cast Iron Fittings with Epoxy Coating, they are made of black fittings and lined with PP via injection machine with outside epoxy coating, used to connect the PE-lined steel pipe with outer PE coating(Poly Steel Pipe) by thread.

This kind of fittings are also called as poly steel fittings in Malaysia.

The working pressure is up to 1.6Mpa and size available is from 1/2"(15mm) to 4"(100mm).

Specification: BS EN 10241:2000, BS EN10226-1:2004, BS EN10242, BS143&1256 
              JWWA K116:1987, JPF MP003-2003, JPF MP005-2004, CJ/T137-2008

The poly steel fittings are made of malleable cast iron fittings
and lined with propylene (PP) via injection machine with outside epoxy coating,
used to connect with poly steel pipe by thread.
The working pressure is up to 1.6Mpa and size available is from 1/2"(15mm) to 4"(100mm).
Specification: BS EN 10241:2000, BS EN10226-1:2004, BS EN10242, BS143&1256 
              JWWA K116:1987, JPF MP003-2003, JPF MP005-2004, CJ/T137-2008

Poly Steel Fittings, Lined G. I Fittings, Epoxy Coating Fittings, PP-lined Fittings, Polymer-cored pipe fittings, malleable iron threaded fittings of lining plastic