Mild Steel coils/strips are used as raw material fed to rolling mill where in at very initial stage trademark of "JPC" is embossed and it repeats per meter length. The consecutive squeezing rolls draws the strip into pipe thereafter high frequency induction welder having servo control does a smooth and uniform welding. Followed by these operations cooling, sizing, cutting into required length is done by automatic process. End facing machine removes the burr from pipes providing smooth finish at the edges thereafter threading is done by one of the best threading machines in its segment and coupler is attached at one end. The one end socket pipe is dipped in stove enameled black paint or any other color as per customer's requirements. Finally the painted pipes are labeled with stickers mentioning the "JPC" Trademark, outer diameter size of conduit pipe, ISI mark with CML no. The pipes then wrapped with plastic bag and packed with hessian cloth after which marking is done on each bundle with the help of stencils.
However, Galvanizing for conduits is done by the hot dip galvanizing process. The process starts with surface preparation likes degreasing (by hot alkali solution which removes dirt), pickling (by dilute solution of sulphuric acid which removes rust). & fluxing (immersing in zinc ammonium chloride solution), then dipping in molten zinc solution having temp of approx. 840oF (449oC) called galvanizing, and goes through final inspections. During galvanizing, there are metallurgical bonds between zinc and steel, which create a highly abrasion resistant zinc-iron alloy layer. The pipes withdrawn from galvanizing bath, excess zinc is removed by draining or vibrating. Coating/thickness and surface condition inspections complete the process. After the galvanizing process, the galvanized tubes are sent for threading followed by labeling, packing and marking.