Electric Resistance Welded (ERW) Pipes are manufactured from Hot Rolled Coils / Slits. All the incoming coils are verified based on the test certificate received from steel mill for their chemistry and mechanical properties. ERW pipe is cold-formed into a cylindrical shape, not hot-formed. Instead of flame, electric current is used for heating edges of the strip for weld fusion. This welding process does not need any filler metal. Instead, the welding pressure causes some of the metal to be squeezed from the joint, forming a bead of metal on inside and outside of the tube. This bead or welding flash is trimmed or completely removed during the process. During production, online visual inspection is also carried out for surface defects, diameter accuracy, ovality and weld bead shape. Required sample rings as per specification are cut to carry out mechanical testing of weld and body e.g. flattening test, bend test
ZENITH STEEL PIPES & INDUSTRIES LIMITED is pioneers in the field of manufacturing of ERW & HOT DIP GALVANIZED pipes in India. Incorporated in 1960, our commercial production commenced in the year 1962. Till 1971, Zenith manufactured Steel Pipes by ERW process. Thereafter, the manufacturing Process was converted to the imported technology of High Frequency Induction Welding (HFIW) process. We are one of the largest suppliers of ERW Black & Galvanized pipes to the U.S.A market from India. We are certified for ISO 9001:2008, 14001:2001, OHSAS 18001:2007, UL 852 for Fire Sprinklers and CE certified. We also manufacture Spirally Welded Pipes (HSAW) from 18 inch to 100 inch OD (457 mm to 2540 mm OD) which is used in the bulk transportation of water. We have been awarded for Export Excellence by Government of India & are the largest exporters of ERW Galvanized pipes to the US market & also have presence of our products in 79 countries worldwide. Our products meets all major Indian standards (IS-1239, IS-3589, IS-1161 etc) and international standards of ASTM, DIN, EN etc. Our products are used for various applications like Fencing, fire fighting system, water transport distribution, sprinklers, scaffolding, energy power etc. We are registered with major Public sector companies of India and some of our prestigious customers includes BHEL, Reliance Industries Ltd, Larsen and Toubro Ltd , IOCL, BPCL,NTPC, GNVFC etc. We have executed several Domestic & International prestigious projects, to name a few: 1. Saudi Iraq Border Fencing projects 16100 Metric tons 2. Irrigation & Public Health Department, Himachal Pradesh 12650 Metric tons 3. L&T for Transmission of water in Tamilnadu TWAD 26000 M Tons 4. Burj Dubai Development – The Resident Phase –I,II,III 5. World Trade Centre, Dubai
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