Condensation　heat　transfer　in　tube　is　widely　applied　in　industrial　production,　and　the　heat　transfer　process　is　often　weakened　by　non-condensable　gas　(NCG)　in　actual　production.　Enhancing　condensation　heat　transfer　is　beneficial　to　improve　production　efficiency,　which　has　always　been　a　hot　topic　in　current　research.　Foam　metal　material　with　large　specific　surface　area　and　good　thermal　conductivity　is　an　ideal　material　to　enhance　heat　transfer.　In　order　to　study　enhancement　heat　transfer　effect　and　optimize　structure　of　foam　metal,　this　paper　investigated　condensation　heat　transfer　in　tube　strengthened　by　foam　metal　in　presence　of　NCG　experimentally.　Section　shape　of　foam　metal　is　annular,　and　the　pores　per　inch　(PPI)　of　foam　metals　is　10,　15,　20　respectively.　The　effects　of　PPI　value,　steam/air　mixture　mass　flow,　and　NCG　mass　fraction　on　heat　transfer　coefficient　(HTC)　and　flow　resistance　are　studied.　The　results　reveal　the　following:　(1)　Compared　with　smooth　tube,　the　foam　metal　enhances　heat　transfer　significantly,　and　HTC　increases　by　1.5-2.3　times.　(2)　At　same　steam/air　mixture　mass　flow,　10PPI　foam　metal　tube　has　the　highest　HTC　compared　to　others.　(3)　With　increase　of　NCG　mass　fraction　and　PPI　value,　pressure　drop　increases　and　the　HTC　decreases.　Based　on　experimental　data,　pressure　drop　and　HTC　correlations　are　developed.　This　paper　provides　an　important　technical　basis　for　foam　metal　material　application　in　enhancement　heat　transfer　area.　©　2024　Institute　of　Physics　Publishing.　All　rights　reserved.