I’m having some trouble finding a good pipe/tube for our injector barrel. I’d appreciate guidance from anyone who has built one especially if you have sourced in US.
The issue I am having is that the steel pipe I can find all is welded. I have found galvanized and aluminum pipe that is seamless, but would those work? As I understand, galvanized steel does not weld well unless you grind off the outer layer.
I have found 1-1/4″ OD, 1″ ID steel tubing or 1-1/2″ OD, 1-1/4″ ID steel tubing, but these do not have the NPT threads on them. It is nice in the standard design to be able to use standard NPT fittings, so I was hoping to go that way. And, another question I have is if I were to use the 1-1/4″ OD, 1″ ID steel tubing, then I presume that a 1″ diameter steel rod would be too snug to properly slide for the injector. From what I have been able to find, most recommend about 1mm difference between the tube/pipe ID and the rod OD.
Please share what has worked for you.