PPGI is pre-painted galvanised iron, also known as pre-coated steel, coil coated steel, color coated steel etc., typically with a hot dip zinc coated steel substrate. The term is an extension of GI which is a traditional abbreviation for Galvanised Iron. Today the term GI typically refers to essentially pure zinc (>99%) continuously hot dip coated...
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http://en.wikipedia.org/wiki/PPGI
Pre-painted galvanised iron, a common term for pre-painted hot dip galvanised steel - also known as organic coated sheet [OCS] or prepainted sheet
Found on
https://www.steelonthenet.com/files/glossary-5.html
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