For the Hot-rolled Grooved Fittings, they are UL/FM listed. The outside is galvanized ductile iron grooved fittings, inside is PE powder coating by hot-rolled. As an option, the outside ductile iron grooved fittings can be painted or epoxy. And the inside PE can be of gray, white or red color. And also, as a choice, the inside can be epoxy coating.
Generally they are used to connect the PE or UPVC-lined Galvanized Steel Pipe with size over 65mm.
Since the lining covering the interior and ends of the fittings, they are also used for abrasive and corrosive service applications.
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