I cannot help with sch 80 pipe, but we crimp flanges on high pressure metric tubing (see Voss). You can also bend this tubing and it is much cleaner than black pipe.
I am in the hydraulic industry. Please help me determine the min. thread engagement for a 10-24 socket head cap screw grade 8. I am using 4 of these screws to mount a size D03 hydraulic valve on an aluminum manifold. My maximum pressure is 3,000 psi.
Thanks for your help.