In 2014, several heat exchangers at an Egyptian Propane Dehydrogenation plant failed unexpectedly and caused a production shutdown. In close cooperation, Sandvik and the licensor developed a solution. Within just ten weeks, Sandvik delivered 12 tons of super-duplex tubes (Sandvik SAF 2507) proving the effectiveness of its express delivery programme for duplex steels, made possible by the company’s expertise in producing and testing stainless steel tubes together with its high delivery flexibility and long-term relationship with the licensor.
Photo courtesy of Sandvik
The SAF 2507 super-duplex tubes, were all to a non-standard dimension, in accordance with the customer’s specification and with 3.2 inspections in several partial deliveries.
Sandvik SAF 2507 (EN 1.4410) is a high-alloyed stainless duplex steel specifically developed for operation in highly corrosive environments. Its austenitic-ferritic microstructure is carefully balanced (50:50) and guarantees high corrosion resistance with a Pitting Resistance Equivalent number of min. 42.5. Sandvik’s express delivery programme for duplex steels was launched in 2013. Its concept is to deliver duplex (Sandvik SAF 2205) and super-duplex (Sandvik SAF 2507) heat exchanger tubes within 6 to 8 weeks according to customer specification.
