DIN 1630 ST37.4 seamless steel tubes/pipes are predominantly used in the construction of chemical plants, vessels, pipework and for general mechanical engineering purpose. The St37.4 steel tubes of DIN1630 are designed to meet high performance requirements. Normally , there are no limiting values for the maximum permission working pressure of DIN 1630 ST37.4 seamless steel tubes. The permissible working pressure shall not exceed 300°C.(The upper yield stress values for tubes at temperature up to 300°C are specified in below sheet.

DIN1630 St 37.4 seamless steel pipe upper yield stress for a design temperature