Mcneil Instruments is a trusted manufacturer, supplier and exporter of Stainless Steel 347 Pipe Fittings, serving customers across the USA, Turkey and Nigeria. SS 347 fittings are stabilized with niobium, providing excellent resistance to intergranular corrosion and reliable performance at elevated temperatures. Our fittings are suitable for demanding applications in chemical processing, petrochemical plants, refineries, power generation, heat exchangers and high-temperature piping systems. We supply quality-tested Stainless Steel 347 fittings in various sizes, schedules and configurations, with dimensional accuracy, material traceability and export-ready packaging for international projects.