The tea industry uses the term orange pekoe to describe a basic, medium-grade black tea consisting of many whole tea leaves of a specific size;[3] however, it is popular in some regions (such as North America) to use the term as a description of any generic black tea (though it is often described to the consumer as a specific variety of black tea).
https://en.wikipedia.org/wiki/Tea_leaf_grading
Orange Pekoe is used in the tea industry to describe a basic medium grade black tea consisting of many single whole tea leaves of a specific size; however, it is usually used in popular Western culture to describe any generic black tea.
http://www.tarladalal.com/glossary-orange-pekoe-123i
"オレンジペコー"という名称はグレードとは関係なく好き勝手に使われているってこった