bids are invited for custom bid for services - so for exchanger jobs - production block-floating head cover type exchanger overhauling , bids are invited for custom bid for services - so for exchanger jobs - production block-repairs and testing of heat exchangers without bundle pull out upto 20 shell id overhauling, repairs and testing of exchangers upto 20 shell id with bundle pull out repairs and testing of he without bundle pull out - above 20 upto 35 shell id overhauling, repairs and testing of he with bundle pull out - above 20 upto 35 shell id repairs and testing of he without bundle pull out - above 35 upto 45 shell id overhauling, repairs and testing of he with bundle pull out - above 35 upto 45 shell id repairs and testing of he without bundle pull out - above 45 shell id overhauling, repairs and testing of he with bundle pull out - above 45 shell idrepairs and testing of u-tube type he without bundle pull out - up to 35 overhauling, repairs and testing of u-tube type he with bundle pull out - upto 35 repairs and testing of u-tube type he without bundle pull out - above 35 upto 45 shell id overhauling, repairs and testing of u-tube type he with bundle pull out - above 35 upto 45 shell id overhauling, repairs and testing of u-tube type he without bundle pull out -above 45 shell id overhauling, repairs and testing of u-tube type he with bundle pull out - above 45 shell idrepairs and testing of fixed tube sheet he - above 20 upto 35 shell id repairs and testing of fixed tube sheet he - above 35 upto 45 shell id repairs and testing of fixed tube sheet he - above 45 shell idrepairs to o/h condensers n coolers (except 12e7a/b, 42e61a/b, 4e75) without bundle pull out upto 20 repairs to o/h condensers n coolers (except 12e7a/b, 42e61a/b, 4e75) with bundle pull out upto 20 repairs to o/h condensers n coolers (except 12e7a/b, 42e61a/b, 4e75) without bundle pull out from 20 upto 45 diameter repairs to o/h condensers n coolers (except 12e7a/b, 42e61a/b, 4e75) with bundle pull out from 20 upto 45 diameter repairs to o/h condensers n coolers (except 12e7a/b, 42e61a/b, 4e75) without bundle pull out above 45 diameter repairs to o/h condensers n coolers (except 12e7a/b, 42e61a/b, 4e75) with bundle pull out above 45 diameterrepairs and testing of preheat heat exchanger in cdu-iii without bundle pull out - above 35 upto 45 shell id this item rate is applicable for carrying out repair and testing jobs on 42-e-02a/b,42-e-04a/b,42-e-15a/b, 42-e-23a/b,42-e-54a/b,42-e-05,42-e-10,42-e-13, 42-e-22, 42-e-25, 42-e-26 & 42-e-03. overhauling, repairs and testing of preheat heat exchanger in cdu-iii/ vbu with bundle pull out - above 35 upto 45 shell id this item rate is applicable for carrying out overhauling, repair and testing jobs on 42-e-02a/b,42-e-04a/b,42-e-15a/b, 42-e-23a/b,42-e-54a/b,42-e-05,42-e-10,42-e-13, 42-e-22, 42-e-25, 42-e-26 & 42-e-03. repairs and testing of preheat heat exchanger in cdu-iii/vbu without bundle pull out - above 45 shell id this item rate is applicable for carrying out repair and testing jobs on 42-e-24a/b/c/d,42-e-28a/b,46-e-01a-h, 42-e-06,42-e-16,42-e-17 & 42-e-27. overhauling, repairs and testing of preheat heat exchangers in cdu-iii/vbu with bundle pull out - above 45 shell id this item rate is applicable for carrying out overhauling, repair and testing jobs on 42-e-24a/b/c/d,42-e-28a/b,46-e-01a-h, 42-e-06,42-e-16,42-e-17 & 42-e-27. etc