GB/T 40791-2021Non-destructive testing of steel tubes - Radiographic testing of the weld seam of welded steel tubes for the detection of imperfections (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for

Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.

This Document equivalently adopted ISO 10893-6:2019 Non-Destructive Testing of Steel Tubes

- Part 6: Radiographic Testing of the Weld Seam of Welded Steel Tubes for the Detection of

Imperfections.

The Chinese documents that have consistent correspondence with the international standard

documents normatively cited in this document are as follows:

--- GB/T 3323.1-2019 Non-destructive testing of welds - Radiographic testing - Part 1: X-

and gamma-ray techniques with film (ISO 17636-1:2013, MOD);

--- GB/T 9445-2015 Non-destructive testing - Qualification and certification of NDT

personnel (ISO 9712:2012, IDT);

--- GB/T 12604.2-2005 Non-destructive testing - Terminology - Terms used in radiographic

testing (ISO 5576:1997, IDT);

--- GB/T 19348.1-2014 Non-destructive testing - Industrial radiographic film - Part 1:

Classification of film systems for industrial radiography (ISO 11699-1:2008, MOD);

--- GB/T 19802-2005 Non-destructive testing - Industrial radiographic illuminators -

Minimum requirements (ISO 5580:1985, IDT);

--- GB/T 19943-2005 Non-destructive testing - Industrial radiographic illuminators -

Minimum requirements (ISO 5579:1998, IDT);

--- GB/T 23901.1-2019 Non-destructive testing - Image quality of radiographs - Part 1:

Determination of the image quality value using wire-type image quality indicators (ISO

19232-1:2013, IDT);

--- GB/T 23901.2-2019 Non-destructive testing - Image quality of radiographs - Part 2:

Determination of the image quality value using step/hole-type image quality indicators

(ISO 19232-2:2013, IDT);

--- GB/T 40385-2021 Non-destructive testing of steel tubes - Digital radiographic testing of

the weld seam of welded steel tubes for the detection of imperfections (ISO 10893-

7:2019, IDT).

The following minimal editorial changes have been made to this Document:

--- In order to harmonize with existing standards, change the name of the standard into Non-

Destructive Testing of Steel Tubes - Radiographic Testing of the Weld Seam of Welded

Steel Tubes for the Detection of Imperfections.

Please note some contents of this Document may involve patents. The issuing agency of this

Document shall not assume the responsibility to identify these patents.

This Document was proposed by China Iron & Steel Association.

This Document shall be under the jurisdiction of National Technical Committee on Steel of

Standardization Administration of China (SAC/TC 183).

Drafting organizations of this Document: Baoji Petroleum Steel Pipe Co., Ltd. (Chinese

National Engineering Research Center for Petroleum and Natural Gas Tubular Goods); Jiangsu

Wujin Stainless Steel Pipe Group Co., Ltd.; Zhejiang Kingland Pipe Industry Co., Ltd.; Pabo

Testing Technology Service Co., Ltd.; CNPC Tubular Goods Research Institute; and China

Metallurgical Information and Standardization Institute.

Chief drafting staffs of this Document: Wen Hongwei, Fu Hongqiang, Zhu Xiaobin, Fan

Hailong, Zhang Rongsheng, Dong Li, Huang Lei, Zhang Yi, Chen Zemin, Zhang Xiaoming,

Shen Zaofeng, Xue Leihong, and Zhao Lihua.

Non-Destructive Testing of Steel Tubes - Radiographic

Testing of the Weld Seam of Welded Steel Tubes for the

Detection of Imperfections

1 Scope

This Document specifies requirements for film-based radiographic X-ray testing of the

longitudinal or helical weld seams of automated fusion arc-welded steel tubes for the detection

of imperfections.

This Document can also be applicable to the testing of circular hollow sections.

NOTE 1: As an alternative, see ISO 10893-7 for digital radiographic testing.

NOTE 2: Radiographic inspection of butt weld seam can be performed by reference.

2 Normative References

The provisions in following documents become the essential provisions of this Document

through reference in this Document. For the dated documents, only the versions with the dates

indicated are applicable to this Document; for the undated documents, only the latest version

(including all the amendments) is applicable to this Document.

ISO 5576 Non-Destructive Testing - Industrial X-Ray and Gamma-Ray Radiology -

Vocabulary

ISO 5579 Non-Destructive Testing - Radiographic Testing of Metallic Materials Using

Film and X- or Gamma rays - Basic Rules

ISO 5580 Non-Destructive Testing - Industrial Radiographic Illuminators - Minimum

Requirements

ISO 9712 Non-Destructive Testing - Qualification and Certification of NDT Personnel

ISO 10893-7 Non-Destructive Testing of Steel Tubes - Part 7: Digital Radiographic

Testing of the Weld Seam of Welded Steel Tubes for the Detection of Imperfections

ISO 11484 Steel Products - Employer's Qualification System for Non-Destructive Testing

(NDT) Personnel

ISO 11699-1 Non-Destructive Testing - Industrial Radiographic Film - Part 1:

Classification of Film Systems for Industrial Radiography

ISO 17636-1 Non-Destructive Testing of Welds - Radiographic Testing - Part 1: X- and

Gamma-Ray Techniques with Film

ISO 19232-1 Non-Destructive Testing - Image Quality of Radiographs - Part 1:

Determination of the Image Quality Value Using Wire-Type Image Quality Indicators

ISO 19232-2 Non-Destructive Testing - Image Quality of Radiographs - Part 2:

Determination of the Image Quality Value Using Step/Hole-Type Image Quality Indicators

3 Terms and Definitions

For the purposes of this Document, the terms and definitions given in ISO 5576, ISO 11484

and the following apply.

4 General Requirements