Flexible PWHT Ceramic Pad (FCP) heater is made by multi-strand quality 80/20 Nichrome heating wire through passages within interlocking ceramic beads, complete with two electrically insulated camlock, which is protected from being heated by cold pure nickle wire that connects the heating wire. The PWHT alumina ceramic beads are made of sintered 95% Alumina Ceramics. It enjoys high temperature resistance, excellent insulating property, and efficient thermal conductivity, which provides PWHT ceramic pad heaters with exceptional electrical insulating,and thermal shock resistance and thermal condutivity qualities when Post Weld Heat Treatment.