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GB/T 29459.1-2012Small punch test methods of metallic materials for in-service pressure equipment - Part 1: General requirements (English PDF)

在役承压设备金属材料小冲杆试验方法第1部分总则

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Issued by

General Administration of Quality Supervision, Inspection and Quarantine

Level / Type

National · Recommended

Issue date

December 31, 2012

Implementation date

July 1, 2013

Scope

GB/T 29459.1-2012 is the English-translated version of 在役承压设备金属材料小冲杆试验方法第1部分总则.

GB/T 29459.1-2012 — This Part of GB/T 29459 specifies general requirements for small punch test methods of metallic materials for in-service pressure equipment. This Part is applicable to metallic materials for pressure equipment.

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Document preview — GB/T 29459.1-2012

National Standard of the People's Republic of China

ICS: 77.040.10
Classification: H 22

Issued by: General Administration of Quality Supervision, Inspection and Quarantine

Foreword...3
Introduction...4
1 Scope...5
2 Normative references...5
3 Terms, definitions and symbols...5
4 Specimen...8
5 Test device...9
6 Test report...10

Foreword

GB/T 29459 Small punch test methods of metallic materials for in-service

pressure equipments consists of the following two parts.

- Part 1. General requirements;

- Part 2. Method of test for tensile properties at room temperature.

This Part is the first part of GB/T 29459.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part mainly referred to relative technical content of CWA 15627 Small

punch test methods of metallic materials and was formulated based on the

combination of the actual situation of China and research results.

This Part was proposed by and shall be shall be under the jurisdiction of

National Technical Committee on Boiler and Pressure Vessel of Standardization

Administration of China (SAC/TC 262).

The drafting organizations of this Part. China Special Equipment Inspection and

Research Institute, East China University of Science and Technology, Nanjing

University of Technology, Nanjing University of Technology, Jiangsu Special

Equipment Safety Supervision and Inspection Institute.

Main drafters of this Part. Xu Tong, Sun Liang, Jia Guodong, Guan Kaishu,

Wang Zhiwen, Ling Xiang, Yuan Biao, Qian Gong, Zhang Xian, Li Liqun, Ding

Keqin.

Small punch test methods of metallic materials

for in-service pressure equipments –

Part 1. General requirements

1 Scope

This Part of GB/T 29459 specifies general requirements for small punch test

methods of metallic materials for in-service pressure equipment.

This Part is applicable to metallic materials for pressure equipment.

2 Normative references

The following referenced documents are indispensable for the application of

this document. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any

amendments) applies.

GB/T 16825.1-2008, Verification of static uniaxial testing machines - Part 1.

Tension/compression testing machines - Verification and calibration of the

force-measuring system

3 Terms, definitions and symbols

3.1 Terms and definitions

The following terms and definitions apply to this document.

3.1.1 small punch test; SPT

a test method for mechanical properties which takes micro-sheet sample as test

object; this method fixes the edge of the sheet specimen; the center of the

specimen is loaded with a spherical punch at the top of the punch in a

mechanically loading manner; the mechanical properties of the composites are

determined by experimental data association. The schematic diagram of the

test device is shown in Figure 1.

3.1.2 load; F

the mechanical force exerted by the plunger on the specimen

3.1.9 sample

a sheet of material removed from the equipment

3.1.10 specimen

the sheet material which meets small punch test requirements

3.2 Symbols

d1 - specimen diameter, in millimeters (mm);

d2 - lower fixture aperture, in millimeters (mm);

E - elastic modulus, in megapascals (MPa);

F - load, in newtons (N);

h - specimen thickness, in millimeters (mm);

r - radius of the punch or ball, in millimeters (mm);

T - test temperature, in Celsius degrees (°C);

t - test time, in seconds (s);

u - punch displacement, in millimeters (mm);

V - test speed (movement speed of punch under pressure), in millimeters per

second (mm/s).

4 Specimen

4.1 Sampling

4.1.1 General requirements

Sampling should prevent overheating and work hardening which shall affect the

mechanical properties of the specimen. The specimen shall not contain any

cracks and other macroscopic defects. And it should ensure that the cut pieces

have integrity.

4.1.2 Sampling position

The cutting of test piece should avoid the corrosion layer (as shown in Figure

3).

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 10 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 16825.1-2008Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system

Cited by

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