1 This unification applies, as a rule, to steel tubes with a circular section, having an external diameter less than or equal to 400 mm and a thickness less than or equal to 15% of the external diameter. 2 For particular cases, the applicability of this unification can be specified, with regards to the maximum diameter and thickness, by the specification relating to the product.
UNI 5468-1965 history
1965UNI 5468-1965 Mechanical testing of metal materials. Steel pipe extrusion test