Nominal

Outside Dia

Structural Diamter

Size

Do

d

T

1/2″

30.5

16

1/2″

3/4″

38

22

3/4″

1″

44

28

1″

1-1/4″

54

35

1-1/4″

1-1/2″

60

43

1-1/2″

2″

73

54

2″