Welding joint fixed forging steel ball valve
Design Standard:GB/T 12237 GB/T 19672 API 6D
Structure length Face to Face:GB/T 12221 API 6D ASME B16.10
FIanged Size:GB/T 9113 JB/T 79 ASME B16.5 ASME B16.47
Inspection and test st & it: B / T 9092 GB/T 19672 API 598 API 6D