It would simplify installation of a new brake pipe if it was in two pieces, with a connector in the middle. I'm fine using proper flared connectors, and have a decent Sykes Pickavant flaring tool.
I see you can buy male-male and female-female connectors, metric and imperial, but that means going hunting.
Is there any reason not to use, say an ordinary female brake union, with a female flared pipe, connecting to a male flare held in with a male union fitting?
Kevin