hi guys

i am from portugal, and i am try to build a k20 sidewinder manifold, but i dont know wich wall thickness i have to buy to fabricate stainless steel manifold

someone can help me, i have done my research, but here in portugal we dont work with schedule, my supliers dont know wath it is

thanks

 

I going to guess 1.5" sch40 0.145in (3.683mm)

from http://en.wikipedia.org/wiki/Nominal_Pipe_Size