I.D.  | 
    O.D.  | 
    W.P.  | 
    W.P.  | 
    MIN.B.P.  | 
    W.T.  | 
  ||||
Dash  | 
    In.  | 
    mm  | 
    mm  | 
    MPa  | 
    psi  | 
    MPa  | 
    psi  | 
    mm  | 
    g/m  | 
  
-4  | 
    1/4  | 
    6.3  | 
    12.7  | 
    27.5  | 
    3990  | 
    110  | 
    15960  | 
    40  | 
    360  | 
  
-5  | 
    5/16  | 
    7.9  | 
    14.3  | 
    25  | 
    3625  | 
    100  | 
    14500  | 
    40  | 
    430  | 
  
-6  | 
    3/8  | 
    9.5  | 
    18  | 
    22.5  | 
    3260  | 
    90  | 
    13040  | 
    50  | 
    480  | 
  
-8  | 
    1/2  | 
    12.7  | 
    19.8  | 
    18.5  | 
    2680  | 
    74  | 
    10720  | 
    70  | 
    620  |