主要海上应用结构钢锻件的制造（第一版

[中文适用范围]： 按照本规范制造的锻件旨在用于制造海上结构@海洋立管@TLP腱和管道@或用于永久海上结构应用的其他系统组件。本规范定义了碳钢和低合金钢锻件@的制造@测试@和检验的最低要求，包括挤压件和厚壁无缝管产品@等级345 N/mm2至586 N/mm2（50 ksi至85 ksi）用于初级钢铁应用。服务类别 A@ B@ 和 C（SCA@ SCB@ 和 SCC）反映了锻件几何形状和纳入整个系统@的方法，而不是关键级别。它们也可以由用户（购买者）指定，如 4.4 中所述，以反映适度不同但标准化的性能水平。 [外文原描述]： Forgings manufactured to this specification are intended for use in the fabrication of offshore structures, marine risers, TLP tendons and pipelines, or other system components intended for application on permanent offshore structures. This specification defines the minimum requirements for manufacture, testing, and inspection of carbon and low-alloy steel forgings, including extrusions and heavy-wall seamless tubular product, grades 345 N/mm2 to 586 N/mm2 (50 ksi to 85 ksi) for use in primary steel applications. Service categories A, B, and C (SCA, SCB, and SCC) reflect forging geometry and method of incorporation into the overall system, rather than levels of criticality. They may also be designated by the user (purchaser) to reflect moderately different but standardized levels of performance.