cooled stringer tube support system 221 extend from the economizer inlet header 180 up through the economizer inlet intermediate and outlet banks 120 130 140 through the clear space existing between the tubes of the economizer as is known in the art the economizer banks are comprised of continuous sections 70 see fig7 of tubes arranged side by side at a predetermined side spacing through which the flue gas passes in the present invention these water cooled tube supports 221 are provided with supports 510 see fig8 between each row of tubes 160 preferably tie rounds 520 surround two adjacent sections 70 and these tied sections rest upon castings 530 welded to the water cooled stringer tubes 221 as illustrated in fig7 and 8 a water cooled stringer support tube 221 is provided for a pair of adjacent sections 70 by welding the casting 530 to the water cooled stringer tubes 221 the castings are also water cooled which allows for the use of lower grade materials the present invention achieves several benefits the largest of which is the ability to provide an economical economizer arrangement which can be retrofitted to an existing steam generator these supports eliminate the need for expensive high alloy based mechanical support systems this economizer design has the ability to give the same economizer performance as the existing economizer with multiple coals without having to move any pieces of equipment inside the convection pass i e the inlet or intermediate headers it also helps with maintenance concerns by increasing the reliability of the economizer and decreasing ash build up due the increased spacing of the economizer while specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention it will.