If you ' re using carbon steel pipe , then it ' s not going to carry media that ' s significantly corrosive . E . g . Fresh water with low dissolved oxygen content . In that case back purging isn ' t going to do much for you . Corrosion resistance isn ' t much of a concern . <| sep |> She is such an idiot . <| sep |> To make up a story is bad enough but to even consider spitting in someone ' s face she must be bloody deranged <| sep |> Same thing to me . I cant change the word now . <| sep |> I think if Sjin had not cheated this game would have gone to Lewis . He rolled over Mark and Duncan and if Sjin was playing like his regular self and we remove the Scythia exploit then I don ' t think anyone could have stopped him . That ' s just ifs and buts though , at the end of the day Sjin won the first game of Civ 6 . Hopefully in future , balanced games he can do so by his own superior skill because that would be good to see .