公称通径
Nominal Pipe
Size
外径
Outside
Diameter
公称壁厚 T
Norminal Wall Thickness
NPS BN D SCH5s SCH10s SCH10 SCH20 SHC30 SCH40s STD SCH40 SCH60 SCH80s XS SCH80 SCH100 SCH120 SCH104 SCH160 XXS
1/8
1/4
3/8
6
8
10
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1/2
3/4
1
15
20
25
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