procurement of aluminium sheet roll for piping insulation, boiler fin, elbow and clinker protection rod for boiler of 1 x 500mw unit at sgtps, mppgcl, birsinghpur. procurement of aluminium sheet roll for piping insulation, boiler fin, elbow and clinker protection rod for boiler of 1 x 500mw unit at sgtps, mppgcl, birsinghpur. , aluminum sheet roll ( width 1000mm x thick 0.63mm ) , boiler fin ( 12.7mm x 6mm ) , boiler fin ( 63.5mm x 6mm ) , clinker protection rod plain ( dia. 10mm ) , elbow socket bend 90 deg. 15 nb , elbow socket bend 90 deg. 25 nb , elbow socket bend 90 deg. 40 nb , elbow socket tee 15 nb , elbow socket tee 25 nb , elbow socket tee 40 nb