1. diversity of size 2. F316, F51,35CrMo, 36CrNiMo4 and so on 3. Heat treatment 4. detailed record cards of process 1)output flange, input flange, plane flange, high-pressure flange2)Description of product: manufactured and inspected according to the national standards or ASTM, such as GB/T6402-91, JB4730-2000, JB4726-2000,JB4727-2000, JB4728-2000, and JB/75000.8.19983)dimensions≤2,000mm, per ...