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Plain End-Square cut or bevelled Black, self-colored/uncoated Mill protective oil coating; for both round, square and rectangular tubes, black varnish for outside surface of round tubes. Borusan Mannesmann Galvanized Pipes are manufactured using hot-dip galvanized coating method. In hot-dipping galvanization process, the point most critical to the galvanization quality is the suitability of the pipe material to galvanized coating. The ability of steel to receive galvanized coating is depends on its P (Phosphorus) and particularly, Si (Silicon) content. Finishing Operations • Outside protective coating (black or red vanished), temporary oil application (Other colors are available upon request.) • Hot dip galvanizing • PE, PP Coating