Chinese pipe fitting manufacturing processes - GIFs

[Floradawg]

I'm a little confused. Apparently those are a straight pipe thread, NPS, and not a tapered NPT. They are tapping straight through with the tap being dropped to the bottom. Correct me if I am wrong. Are pipe couplers tapered from both ends? Or are these a coupler of a different type? thanks.
LaVern

I was thinking instead of being for pipe containing fluids it may be couplers for electrical conduit. I don't know if conduit couplers have parallel threads or not. But those do look like schedule 80.