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News

Sandvik steel grade selected for sour service heat exchangers

Sandvik Coromant UK : 22 June, 2004  (Company News)
Engineers India Ltd (EIL), India's state owned design and engineering company, has selected stainless steel heat exchanger tubes in grade UNS N08028 (Sandvik Sanicro 28) to be supplied by Sandvik Materials Technology, Sweden for the DCU package of Indian Oil Corporation Ltd's, Panipat Refinery, about 100km, north of Delhi.

Sandvik Materials Technology is supplying over 80000 meters of 20mm and 25mm outside diameter seamless tubes to the fabricator BHPV (Bharat Heavy Plate and Vessels Ltd), for ten heat exchangers, comprising an overhead condenser and overhead, product and interstage coolers.

Sandvik Sanicro 28 (UNS N08028) is a multipurpose, austenitic stainless steel alloy designed for service in highly corrosive conditions. In the Panipat oil refinery and petrochemical application, the shell side of the heat exchangers are exposed to sour service and the potential for hydrogen induced cracking. Shell side temperatures range from a minimum 40C to a maximum 88C with tube side cooling water between 33C and 45C.

Specially selected by Engineers India Ltd for its corrosion resistance, UNS NO8028 (Sandvik Sanicro 28) offers very high corrosion resistance in strong acids, very good resistance to stress and intergranular corrosion, pitting and crevice corrosion and has good weldability. It has good resistance to chloride and seawater and has found particular application in seawater cooled heat exchangers.

Sandvik Materials Technology produces Sandvik Sanicro 28 seamless tube and pipe in dimensions up to 260mm outside diameter and supplies a range of ANSI pipe and heat exchanger tubes from stock. The steel grade is also available in the form of fittings, welding wire, wire and covered electrodes, strip, bar, plate, sheet, forged and cast products.

Engineers India Ltd (EIL) was established in 1965 to provide engineering and related technical services for oil refineries and other industrial projects. In addition to refineries, EIL has diversified into other fields such as pipelines, petrochemicals, oil and gas processing, offshore platforms, fertilizers, metallurgy and power.

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