FIELD: heating systems.
SUBSTANCE: inventions can be used when manufacturing blocks for block-and-sectional devices intended for utilising the plant exit gas heat, and namely for heating the air by exhaust combustion products coming from gas turbine plant compressor of gas-compressor unit at gas main pipeline compressor stations. At process stations there manufactured are frame members of blocks, members of heated medium supply and discharge header casing as well as tubes and tube plates with holes meant for the tubes. The latter are bent with a tube-bending machine thus producing multi-pass tubes. There mounted is heat exchange block frame and headers whereinto tube plates are welded. Multi-row tube bundle is put together in a block. At least a number of tubes of the multi-row bundle is arranged with a various pitch.
EFFECT: invention improves manufacturing efficiency of heat exchangers and blocks being a part of heat exchangers.
27 cl, 20 dwg
