What is the advantage of API605 flange?

What "API605 flange" strengths? Let's learn more about below:
1, the reverse equilibrium with respect to the flange import / domestic thick forged flanges tower segments now use more wind turbines in terms of their production, processing and low cost, short cycle.
2, the new "API605 flange" node of sufficient strength, with a considerable safety margin.
3, simple structure, reasonable force, effectively improve the situation by force and tower flange weld and welding deformation.
4, hydraulic tensioning device can quickly and accurately applied pre-tension bolts, reverse balance flange mounting convenient and feasible.
5, good fatigue resistance new flange.
6, "API605 flange" the economy is good, the wind turbine can reduce unit manufacturing costs, better market space to develop.