M.J. Patel [india] limited offers boiler tubes. M.J. Patel [india] limited manufactures seamless carbon/alloy steel pipes and tubes, erw boiler tubes, air pre-heater tubes including corten steel tubes, steam pipes and fittings, boiler components. It is an iso 9002 company. This product is used for pressure vessels and reaction vessels. The tube ends into tube sheets are expanded. Tube sheets are made out of mild steel, alloy steel or stainless steel.