Hi,
I built a condessor 5 years ago using 3/4" Seamless pipe, My mistake was that I did not galvenized and after 5 years pipe rusted and system is down.

Now I have to re-build condenssor and thinking to use either seamless pipe or ERW. Cost of ERW is ofcourse lower.

Seamless pipe I used/plannning to use is of ASTM A-106 GR-B
ERW is of standard: API 5L & ASTM 53/BSS 1387

In practical real life, have someone used / experienced ERW condessor?

Would appriciate your input.