Division 3.2.1 Provisions regarding the approval of hydrogen valves Original text. Later amendments are not shown. 3.2.1.1Division 3.2.1.1 3.2.1.2Division 3.2.1.2 3.2.1.3Design temperatures 3.2.1.4Division 3.2.1.4 ← Division 3.2 Division 3.2.1 Division 3.2.1.1 →