HEAT EXCHANGER IS PART OF A WELL TEST PRODUCT LINE AND IS USED TO PROVIDE MAXIMUM VERSATILITY IN WELL FLOW TEMPERATURE CONTROL PRIOR TO THE SEPARATING PROCESS. THE HEAT EXCHANGERS USED IN WELL TESTING APPLICATIONS ARE PRIMARILY USED TO HEAT EFFLUENTS PRIOR TO THE SEPARATION PROCESS. THE HEAT EXCHANGERS HAVE INTEGRAL VALVING TO ENABLE BYPASSING OF THE COILS AND AN IN-LINE CHOKE FOR FLOW CONTROL OF THE WELL WHICH ALLOWS PRESSURE STEPPING AND ALTERING THE PRESSURE AND TEMPERATURES OF THE FLUIDS PRODUCED. THE EXCHANGE HEATERS COME AS DIRECT OR IN-DIRECT HEATERS (FIRED & WATER BATHS). THE WATER BATH UNIT CONSIST OF LOW PRESSURE VESSEL CONTAINING WATER/GLYCOL WHICH IS HEATED BY STEAM COILS. THE WELL FLUIDS PASS THROUGH THE HIGH PRESSURE COILS INSTALLED WITHIN THE VESSEL WHICH PROVIDES A LARGE SURFACE AREA FOR THE HEAT TRANSFER. THE FIRE UNITS CONSIST OF A FIRE TUBE, DIESEL OR GAS IS BURNED DOWN THE TUBE WHICH HEATS UP THE PROCESS COILS. DIRECT UNITS HAVE A HIGHER WORKING PRESSURE VESSEL WHICH CONTAINS THE STEAM MEDIUM WHICH ALLOWS THE WELL FLUID COILS TO BE EXPOSED DIRECTLY TO HEAT SOURCE.

CLASSIFICATION HAS BEEN DETERMINED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETATIVE RULES (GIR)S GIR 1 HAS BEEN USED TO CLASSIFY THIS PRODUCT BY THE TERMS OF HEADING 8419 - MACHINERY, PLANT OR LABORATORY EQUIPMENT, WHETHER OR NOT ELECTRICALLY HEATED (EXCLUDING FURNACES, OVENS AND OTHER EQUIPMENT OF HEADING 8514), FOR THE TREATMENT OF MATERIALS BY A PROCESS INVOLVING A CHANGE OF TEMPERATURE SUCH AS HEATING, COOKING, ROASTING, DISTILLING, RECTIFYING, STERILISING, PASTEURISING, STEAMING, DRYING, EVAPORATING, VAPORISING, CONDENSING OR COOLING, OTHER THAN MACHINERY OR PLANT OF A KIND USED FOR DOMESTIC PURPOSES; INSTANTANEOUS OR STORAGE WATER HEATERS, NON-ELECTRIC. GIR6 HAS BEEN USED TO CLASSIFY THE GOODS TO SUBHEADING LEVEL 841950 - HEAT-EXCHANGE UNITS TARIC CODE 8419818090 - OTHER THAN FOR USE IN CIVIL AIRCRAFT