NPS DN ASTM JIS DIN JIS DIN SCH5s SCH10s SCH10 SCH20 SHC30 SCH40s STD SCH40 SCH60 SCH80s XS SCH80 SCH100 SCH120 SCH140 SCH160 XXS 1/8 6 10.3 - - - - - 1.24 - - - 1.73 1.7 1.73 - 2.41 2.41 2.41 - - - - - 1/4 8 13.7 - - - - - 1.65 - - - 2.24 2.2 2.24 - 3.02 3.02 3.02 - - - - - 3/8 10 17.1 - - - - - 1.65 - - - 2.31 2.3 2.31 - 3.2 3.2 3.2 - - - - - 1/2 15 21.3 21.7 21.3 2.8 2.0 1.65 2.11 - - - 2.7