DL/T 820.4-2020
Technical regulations for ultrasonic testing of pipe welded joints Part 4: In-service testing (English Version)

Standard No.

DL/T 820.4-2020

Language

Chinese, Available in English version

Published By

Professional Standard - Electricity

Latest

DL/T 820.4-2020

DL/T 820.4-2020 history

• 1970 DL/T 820.4-2020 Technical regulations for ultrasonic testing of pipe welded joints Part 4: In-service testing