Fixed cast steel ball valve with full welding structure                            
                        
                         Design Standard :GB/T 12237  GB/T 19672 API 6D
 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
Test&Inspection:JB/T 9092  GB/T 19672 API 598  API 6D