Pankaj Fabricators outlines supplier checks for transformer tanks and core parts

Pankaj Fabricators has released sourcing guidance for transformer makers, saying mismatched tolerances across tanks, clamps and rods can delay final assembly. The Jaipur manufacturer says four pre-purchase checks can help OEMs avoid fitment problems and dispatch delays.

Why it matters: - Transformer assembly can stall when separately sourced parts do not fit together at final build. - The issue can create dispatch delays even when each component passes its own inspection. - The guidance is aimed at OEMs sourcing tanks, tie rods, core bolts and core clamps from multiple suppliers.

What happened: - Pankaj Fabricators issued sourcing guidance for transformer manufacturers appointing suppliers for transformer tanks and accessories. - The company is ISO 9001:2015 certified and has operated since 1978. - The guidance says a recurring delay problem comes from parts that are individually correct but incompatible as a set. - The company says a tank may come from one fabricator, core clamps from another, tie rods from a third and the cable box from a fourth. - The parts can pass separate inspections and still fail to assemble on the customer’s floor.

The details: - The company says welding distortion is usually the root cause, not poor workmanship. - Transformer tanks are large welded structures, and plate movement during cooling changes dimensions. - Fabricators manage that movement through welding sequence, jigs and, where required, stress relief. - Those allowances vary by shop, and each shop measures from its own datum. - The guidance says mismatch becomes visible only at final assembly, after painting and machining are complete. - Pankaj Fabricators says manufacturers should check four things before appointing a supplier: - One check is whether the supplier performs cutting, forming, welding, blasting and painting in-house or sub-contracts some steps. - A fabricator that completes all of those operations on one site carries the cumulative tolerance itself. - Another check is how the tank is tested before dispatch and what the supplier confirms in writing. - A third check is whether the supplier can make clamps and tie rods to the same dimensions as the tank, and who reconciles differences if not. - A fourth check is the documented limits of the supplier’s machinery. - The company says a supplier that publishes what its equipment cannot do is generally reliable on what it can do. - Mukund Totla said Pankaj Fabricators prefers to build the full set rather than quote only one piece. - Totla said making the tank, clamps and rods agree with one another is the difficult part. - Totla said building the full set on one shop floor avoids finger-pointing between vendors. - Pankaj Fabricators makes distribution and power transformer tanks in plain and corrugated, sealed and conventional construction. - The company also makes tank covers and conservator tanks. - Tanks are leakage tested, shot blasted and finished in epoxy paint before dispatch. - The company produces transformer tank accessories and associated steel, including tie rods, core bolts, core clamps and core frames. - Core frames are pressed and welded to supplied core dimensions. - HT and LT cable boxes are built to the required terminal arrangement. - Pankaj Fabricators also makes marshalling boxes, meter boxes, electrical enclosures and racking systems. - Fabrication is done at a single site. - The site uses CNC fiber laser cutting with nesting across the full sheet to reduce offcut. - Heavier plate is profiled on CNC plasma. - Sections are formed on press brakes. - Assemblies are jig-built and welded on MIG and ARC equipment. - Shot blasting, epoxy painting and powder coating are completed in the same works. - The same equipment is also used for custom laser cutting job work for panel builders, machine builders, equipment manufacturers and other fabricators.

Between the lines: - The guidance is also a sales message for integrated sourcing, not just a technical note. - Pankaj Fabricators is positioning single-site production as a way to reduce coordination risk between suppliers. - The checks favor buyers that want clearer accountability before releasing purchase orders. - The focus on documented machinery limits and written test confirmation suggests a shift from informal vendor selection to process-based qualification.

What's next: - Pankaj Fabricators says it supplies transformer manufacturers and industrial customers across India. - The company is also accepting enquiries from transformer OEMs and electrical equipment manufacturers in other markets. - More information is available in the company’s product pages: Transformer tanks, Tie rods and core bolts, Core frames, HT and LT cable boxes and all products.

The bottom line: - Pankaj Fabricators is arguing that transformer buyers should evaluate fit-up risk, not just part quality, before choosing suppliers.