Manufacturing Process
At Shiddgiri Tubes, we follow a highly controlled and precise manufacturing process to deliver stainless steel pipes and tubes that meet global standards of quality, performance, and durability.
Seamless Pipe & Tube Manufacturing
The process begins with a mother hollow, which is coated with chemical and soap solutions to create a thin lubricating layer on the inner and outer surfaces of the tube. This coating ensures smooth drawing through tungsten carbide dies and plugs, achieving the required diameter and thickness. The tubes are then annealed, straightened, cut, deburred, pickled, and passivated to enhance surface finish and mechanical strength.
In another route, the mother hollow undergoes cold pilgering, where internal mandrels and external rolls reduce the size and thickness with high precision. The pilgered tubes are thoroughly degreased and cleaned to remove oil, grease, and impurities before undergoing annealing and finishing operations. Every tube is subjected to 100% hydro-testing, PMI testing, dimensional and visual inspections before being marked and carefully packed for dispatch.
Welded Pipe & Tube Manufacturing
Our welded pipe division is equipped with advanced Continuous Tube Mills featuring Multi-Torch TIG welding technology. High-quality stainless steel strips, inspected and edge-trimmed, are gradually formed into a tubular shape through a series of rollers. The edges are welded using TIG welding, and the internal weld bead is removed online for a smooth finish. The tubes are then cut to the required length and undergo heat treatment (annealing), straightening, and pickling to restore grain structure and eliminate surface scales.
Where final sizes cannot be directly produced, tubes are further processed through cold drawing. Before drawing, tubes are coated with oxalate and soap solution to act as lubricants, reducing friction. The drawing operation is carried out on precision draw benches using dies and plugs to achieve the exact finished dimensions. Post-drawing, the tubes are again annealed, cleaned, and passivated.
Finishing & Quality Assurance
All finished pipes and tubes are computerized inkjet marked with manufacturing standards, grade, size, heat number, and third-party inspection stamps for traceability. Each product undergoes stringent mechanical, chemical, and non-destructive tests before secure packaging and dispatch.
At Shiddgiri Tubes, our robust and efficient manufacturing process ensures the production of stainless steel pipes and tubes that deliver reliability, precision, and long-term performance across diverse industrial applications.
