St37/St52 Large Diameter Seamless Pipe.png

Max OD up to 1300mm, Formed by Hot Expansion Process – St37/St52 Large Diameter Seamless Pipe

DIN 1629 is the German industrial standard specification for seamless circular tubes of non-alloy steels, suitable for chemical plant construction, pressure vessels, piping systems, and general mechanical and engineering purposes. Its main steel grades, St37 and St52, represent typical applications of general-purpose carbon steel and high-strength carbon steel respectively. Our product series achieves full coverage from 1/2 inch (21.3mm) small diameter to 1300mm super large diameter, utilizing various processes including hot rolling, cold drawing, and hot expansion to meet pipeline requirements under different conditions.

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