ASME B31.3 Internal press. of pipe 2

[europipe]

ASME B31.3
Maybe I didn't read the code entirely,
but can someone explain what units to use in Part2 304.1.2

PD
Formula t= --------
2(SE+PY)

What units do I use for P,D?

 

[DSB123]

europipe,
P in psi, D in Inches, S in psi will give t in inches.

or
P in N/mm^2 , D in mm, S in N/mm^2 will give t in mm.

 

[JohnBreen]

..........and Y is dimensionless. E, the weld joint efficiency coefficient is dimensionless and will be 1.0 or less.

 

[europipe]

Thanks, DSB and John, most obliged