Influence of Banded Structure on the Properties of Petroleum Pipe Steel and its Rating Analysis Method

The influence of banded structure on the performance of petroleum pipe was introduced firstly, and the characteristics and application scope of different rating methods of banded structure studied, and the banded structure in different specimens rated using this standards/methods. The banded structure rating of petroleum pipe steel requires proper and reasonable standards/methods for different microstructures. The current standards/methods could not integrate standard diagram comparison with calculation, and can not cover the banded structure rating for all pipeline steel microstructures. Therefore, in order to satisfy the inspection needs of petroleum pipe steel, a new rating standard is required to be established.