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GB/T 19799.1-2026Non-destructive testing - Ultrasonic testing block - Part 1: Standard block No.1 (English PDF)

无损检测超声检测试块第1部分：1号标准试块

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 19799.1-2026 is the English-translated version of 无损检测超声检测试块第1部分：1号标准试块.

Ultrasonic inspection depends on reference blocks whose geometry and material are known, and this document deals with the first of those blocks, the standard block No.1, within the non-destructive testing series on ultrasonic testing blocks. It is Part 1 of a multi-part series and is a recommended national standard rather than a mandatory one. Calibration laboratories, block manufacturers, NDT service companies and quality departments that set up and check ultrasonic flaw detectors will find it relevant when they need a consistent reference artefact for instrument and probe checks.

Issued on 30 July 2026, the standard takes effect on 1 February 2027 and replaces GB/T 19799.1-2015. Anyone who purchases, produces or verifies this type of block for work in China should confirm which edition their contracts and procedures call up before the changeover date.

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Document preview — GB/T 19799.1-2026

National Standard of the People's Republic of China

ICS: 19.100
Classification: J04
Replacing: GB/T 19799.1-2015

Issued by: State Administration for Market Regulation; Standardization Administration of China

Foreword
1 Scope
2 Normative references
3 Terms and definitions

Foreword

GB/T 19799.1-2026 is a recommended national standard (GB/T) of the People's Republic of China, issued on 30 July 2026 by the State Administration for Market Regulation and the Standardization Administration of China, with effect from 1 February 2027.

This edition replaces GB/T 19799.1-2015.

The document adopts an international standard (ISO or IEC).

It is under the responsibility of the Standardization Administration of China.

Classification: ICS 19.100; CCS J04.

1 Scope

Remaining clauses in the full document

2 Normative references
3 Terms and definitions

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Cited by

Similar standards

GB/T 19799.4-2026|GB/T 19799.3-2025

Editions of GB/T 19799.1

Edition	Title	Revision	Status
GB/T 19799.1-2026	Non-destructive testing - Ultrasonic testing block - Part 1: Standard block No.1	current edition	Current
GB/T 19799.1-2015	Non-destructive testing - Ultrasonic testing - Specification for calibration block No.1	previous edition	In force until 1 February 2027

This page sells the current edition, GB/T 19799.1-2026. Earlier editions are listed for reference only.

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