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Pipe markers comply with IIAR Bulletin 114, which modifies the color scheme from yellow to orange to meet ANSI's A13.1 (2007) revised standard. IIAR pipe markers should include: the marker body (AMMONIA), physical state, pressure level, directional arrows, and an ammonia piping abbreviation Style I wrap-around pipe markers fit pipes with outside diameter of 1-1/2 in. to 2-3/8 in. B-689 coiled pipemarkers are designed for marking rusty, dirty, wet or rough pipes where pressure sensitive labels cannot be used Pipe marker includes directional arrows