Symbols for indicating pipe dimensions
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This post was last edited by sxtblo on 2010-9-14 at 15:16. Center mark CL EL +XX.XXX, Top mark height TOP EL +XX.XXX, Bottom mark height BOP EL +XX.XXX, Working point height WOP EL +XX.XXX. Use a “+” sign for values above baseline 0; it can also be omitted. It must be included for values below baseline 0“-”
It doesn’t seem to be as you said; which standard is it based on? As far as I know, it is generally as follows: EL××.××× POS EL××.××× TOS EL××.××× COP EL××.××× BOP EL××.××× TOP EL××.××× WP EL××.××× WP BOP EL××.××× WP TOP EL××.×××