Transformer Tanks By Bharat Bijlee Limited

TANKS OF BELL-TYPE OR CONVENTIONAL CONSTRUCTION - ARE FABRICATED FROM LOW-CARBON MILD STEEL PLATES BY WELDERS QUALIFIED UNDER ASME SECTION IX, AND DESIGNED TO WITHSTAND VACUUM AND PRESSURE ACCORDING TO CBIP GUIDELINES. THEY ARE SHOT-BLASTED TO ACHIEVE A SURFACE PROFILE OF SA 2.5, AND DYE-PENETRATION TESTS AR PERFORMED ON WELDS OF LOAD-BEARING MEMBERS SUCH AS LIFTING LUGS AND JACKING PADS. EXTERNAL SURFACES ARE PAINTED INITIALLY WITH EPOXY PRIMER, FOLLOWED ENAMEL, EPOXY OR POLYURETHANE PAINT DEPENDING ON THE ENVIRONMENTAL CONDITIONS AT SITE. OTHER SURFACE-COATING TREATMENT SUCH AS SPRAY GALVANIZING ARE ALSO AVAILABLE OIL-RESISTANT PAINT IS USED FOR INTERNAL SURFACES. THE TRANSFORMER IS READIED FOR FINAL INSPECTION AFTER ASSEMBLING THE BUSHINGS, CONSERVATOR, RADIATORS AND OTHER ACCESSORIES, AND SPECIAL ACRE IS TAKEN TO ELIMINATE LEAKAGE AND SURFACE CORROSION. PRESSURE AND VACUUM DEFLECTION TESTS COMPLYING WITH CBIP NORMS ARE PERFORMED AS ROUTING PROCESS TESTS.