GB/T 43320-2023 Active National standards

GB/T 43320-2023 Non-destructive testing of welds—Ultrasonic testing—Use of automated phased array technology for thin-walled steel components

Publish Date: 2023-11-27 Implement Date: 2024-06-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 43320-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Welding and cutting

ICS Name: \nWelding joints

Publish Date: 2023-11-27

Implement Date: 2024-06-01

Pages: 21 pages

Scope

This document describes the semi-automatic or fully automatic phased array ultrasonic testing of welded joints in steel components with a wall thickness of 3.2 mm to 8.0 mm. This thickness range is the typical thickness range where this testing technology is primarily applied to boiler tube walls. When using detection grade D, the wall thickness can exceed the minimum or maximum thickness specified in this document. This document applies to fully penetrated welded joints of simple geometries in plates, pipes, and containers, where both the welding material and the base material are low-alloy steel and/or fine-grained steel.
Note: "Semi-automatic detection" includes fixed scanning devices (scanning frames and rulers, etc.) and manually moving one or more probes, with the probe position obtained by position sensors. "Fully automatic detection" also includes mechanized scanning devices.
The acoustic parameters of materials specified in this document are based on a longitudinal wave speed of (5,920±50) m/s and a transverse wave speed of (3,255±30) m/s for steel. When detecting materials with different sound velocities, the impact of sound velocity changes should be considered.
This document provides guidance on the capabilities and limitations of phased array detection technology for detecting, locating, quantifying, and characterizing discontinuities in welded joints. In manufacturing and pre-service inspections, phased array technology can be used as a standalone technique or in combination with other non-destructive testing (NDT) methods or technologies.
This document specifies the following two detection grades:
——Detection grade C, applicable to general cases;
——Detection grade D, applicable to special cases/special applications.
This document evaluates the acceptability of discontinuities based on the following:
——Height and length;
——Amplitude (equivalent size) and length;
——Determination of acceptance/r