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MLTI Private Limited (Moonlight Tube Industries) manufactures ERW and seamless pipes and tubes in materials like stainless steel, duplex steel, and Hastelloy in Gujarat, India, and supplies them across a range of industrial applications. Grade selection changes with the service. Grades 304 and 316L cover many general process applications, while duplex S32205, 904L, and nickel alloys such as Hastelloy C276 are selected for more demanding chloride, acid, and corrosive service.
Exhaust systems, fuel lines, and structural sections in vehicle assembly use austenitic stainless steel tubing. Grade 304 withstands the thermal cycling of downpipes and silencers, while square and rectangular sections form roll cages, seat frames and chassis brackets.
Hydraulic, fuel, and instrumentation lines in aerospace fabrication use stainless tubing. These pressure-bearing systems use grades like 304L and 316L when their qualities fulfil design requirements for wall thickness, bore size, and dimensional tolerances.
Heat exchanger tubes are used in food and dairy processing for heating, cooling and evaporation. In sugar processing, they support juice heating, evaporation, and condensation, where corrosion resistance and reliable heat transfer are important.
Textile mills use stainless tubes on dyeing vessels, bleaching lines and steam distribution to finishing ranges. Dye liquor carries chlorides and acidic auxiliaries at temperature, conditions that pit carbon steel, so 316L is specified across wet processing circuits.
Digesters, black liquor lines and bleach plant washers in pulp mills operate in chlorine dioxide and sulphate chemistry. Duplex S31803 pipe and 316L pipe resist that environment, and the duplex grade adds resistance to chloride stress corrosion cracking.
Shell and tube exchangers transfer heat through the tube wall, so 316L and duplex tubes are used for suitable services, while Hastelloy tubes are selected where the process fluid presents more aggressive corrosion conditions.
Refinery service covers crude distillation overheads, hydrotreater circuits, and sour gas lines. Grade 321 pipe resists sensitisation between 425 and 815°C, which suits reformer and high-temperature process services. While 316L pipe handles the wet chloride side of overhead systems.
Boiler feed lines, condenser tube bundles and cooling water headers make up most of the power station's demand. The condenser tube in 304 and 316 handles circulating water, and IBR-approved pipe is required where the line falls under boiler regulation.
Chemical plants move acids, solvents and process intermediates through 316L and 904L pipe. High nickel and molybdenum in 904L give resistance to dilute sulphuric acid, and reactor jackets, transfer lines and vent headers are run in stainless pipe.
Upstream and midstream work calls for duplex S32205 pipe on separator piping, produced water lines and offshore utility circuits. The duplex structure carries a higher yield strength than austenitic grades and withstands chloride pitting in seawater service.
General engineering and fabrication shops use stainless steel square and rectangular sections for machine frames, guarding and conveyor structures. Cement plants also use stainless steel pipes and tubes in equipment and process areas exposed to moisture, abrasion, and corrosive conditions where material durability matters.
Pharmaceutical facilities run purified water loops, WFI distribution, and clean steam lines in 316L tubes. The low carbon content reduces the risk of chromium-carbide precipitation during welding, while controlled internal finishes support hygienic service