procurement of exchanger tubes 5 items - 1 common description shall apply for all the below items ( quotes implied for the below items as specified in annexure – 2 & 4 ) 2 tube seamless for e1602-2 ( k1602 i stage inter cooler ) tube size : outside dia 19.00 mm minimum wall thickness : 1.65 mm length : 6000 mm material : austenitic alloy steel as per astm a 213 tp 304 annealed at 1040 deg.c or higher temperature n n 3 tube seamless for e1601-1a & 1b n ( k1601 i stage inter cooler ) ntube size : outside dia 19.00mm nminimum wall thickness : 2.11 mm nlength : 4040 mm nmaterial : low carbon steel as per astm a 179 nannealed at 650 deg.c or higher temperature n n n n 4 tube seamless for e1601-2a & 2b n ( k1601 ii stage inter cooler ) ntube size : outside dia 19.00mm nminimum wall thickness : 2.11 mm nlength : 4640 mm nmaterial : low carbon steel as per astm a 179 nannealed at 650 deg.c or higher temperature n 5 tube seamless for e1602-4 n ( k1602 iii stage inter cooler ) ntube size : outside dia 19.00mm nminimum wall thickness : 2.11 mm nlength : 6010 mm nmaterial : low carbon steel as per astm a 179 annealed at 650 deg.c or higher temperature n n n 6 tube seamless for e1602-3 n ( k1602 ii stage inter cooler ) ntube size : outside dia 19.05mm nminimum wall thickness : 1.65 mm nlength : 6106 mm nmaterial : austenitic alloy steel as per astm a 213 tp 304 nannealed at 1040 deg.c or higher temperature n n n n n