技术规范 Technical specification
1.设计制造按：ASME B16.34(Class 150为缩径设计)
Design and production according to ASME B16.34(reduced bore design about the products of Class 150)
2.法兰端尺寸按：ASME B16.5、GB/T9113.6
The sizes of flange ends according to ASME B16.5、GB/T9113.6
3.检验标准：API 598
Inspecting standard: API 598
注：国标PN2.0、PN5.0MPa Y型平底放料阀技术规范同上述各项。
Notes: The technical specification of GB PN2.0、PN5.0MPaY-type flat bottom dumping vavles are the same as the above