Due to the large tonnage of equipment required for the stainless steel three-way hydraulic expansion process, it is currently mainly used in the manufacture of stainless steel three-pass with a standard wall thickness smaller than DN400. Its suitable forming materials are low carbon steel, low alloy steel, and stainless steel with relatively low hardening tendency, including some non-ferrous metal materials such as copper, aluminum, titanium, etc..
Divided into national standards, electric standards, water standards, US standards, German standards, Japanese standards, Russian standards, etc., as follows: GB/T12459, GB/T13401, ASME B16 .9, SH3408, SH3409, HG/T21635, DL/T 695, SY/T 0510, DIN 2615.
