
Methods of ultrasonic inspection and result classification of circumferential butt welds in steel pipes and tubes
NORMA vydána dne 13.12.1995
    
        Designation standards: GB/T 15830-1995
                
                
                
                Note:    NEPLATNÁ
               
                Publication date standards:  13.12.1995
                Country:          Chinese technical standard
        Kategorie:  Technické normy GB