Normal Standard Pipes In the Market
Nominal OD	Nominal OD	Mean OD		Wall Thickness
(Inch)	(mm)	Min	Max	Min	Max
3"	82	82	82.3	1.6	1.8
4"	110	110	110.3	1.6	1.8
6"	160	160	160.4	2.0	2.2
8"	200	200	200.5	3.0	3.2
10"	250	250	250.5	3.0	3.2