GB/T 38912-2020 English PDF (GB/T38912-2020)

GB/T 38912-2020: Test method for closed-end burst of zirconium tubes at room temperature
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GB/T 38912-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
H 22
Test method for closed-end burst of zirconium tubes
at room temperature
ISSUED ON: JUNE 02, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Principle ... 5 
5 Instruments and apparatuses ... 5 
6 Sample ... 6 
7 Test procedure ... 7 
8 Test report ... 9 
Test method for closed-end burst of zirconium tubes
at room temperature
1 Scope
This Standard specifies the test method for closed-end internal pressure burst
of zirconium tubes at room temperature of 10 °C ~ 35 °C.
This Standard applies to the closed-end internal pressure burst test of
zirconium tubes at room temperature of 10 °C ~ 35 °C, and is used for the
determination of bursting strength and percent total circumferential elongation
at the crevasse of zirconium tubes at room temperature.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 8170, Rules of rounding off for numerical values and expression and
judgment of limiting values
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1 Maximum fluid pressure
The maximum pressure value of the fluid acting on the end of the sample,
during the entire loading process of the test.
3.2 Bursting strength
The maximum stress value that is measured when the sample suddenly bursts,
when the tube sample is subject to a burst test and a pressure is continuously
applied through a liquid or other medium.
5.2.3 The pumping system shall be rigid, and its energy storage shall be as low
as possible according to the actual situation. There shall be no pressure
fluctuations in each stroke of the pump.
5.3 Valve
The various valves in the testing machine shall have the functions of controlling
and adjusting the pressure, and shall be able to ensure the safety of the test.
5.4 Pressure transmitter
5.4.1 The pressure transmitter shall have sufficient capacity to monitor the
pressure of the system, and to ensure that the test software records the
maximum fluid pressure reached during the test.
5.4.2 The measurement accuracy of the pressure transmitter shall be level-0.5
or better; the verification period shall not exceed 12 months.
5.4.3 The data collection location of the pressure transmitter shall be as close
as possible to the sample.
5.5 Dimension measuring tools
5.5.1 Use an outside micrometer or other measuring tools of equivalent
accuracy for the outer diameter measurement; the accuracy of the measuring
tool shall not be less than 0.005 mm.
5.5.2 Use a micrometer for measuring pipe wall thicknesses or other measuring
tools of equivalent accuracy for the wall thickness measurement; the accuracy
of the measuring tool shall not be less than 0.005 mm.
5.5.3 Use a vernier caliper or other measuring tools of equivalent accuracy to
measure the circumference after breaking; the accuracy of the measuring tool
shall not be less than 0.05 mm.
6 Sample
6.1 General requirements
6.1.1 The sample cutting location and quantity shall be implemented in
accordance with the relevant product technical requirements. The cut can be
chamfered and deburred, but there shall be no deformation.
6.1.2 The sample cutting length shall be able to ensure that the unsupported
length is not less than 10 times the nominal outer diameter of the sample.
6.2 Sample preparation
GB/T 38912-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.040.10
H 22
Test method for closed-end burst of zirconium tubes
at room temperature
ISSUED ON: JUNE 02, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Principle ... 5 
5 Instruments and apparatuses ... 5 
6 Sample ... 6 
7 Test procedure ... 7 
8 Test report ... 9 
Test method for closed-end burst of zirconium tubes
at room temperature
1 Scope
This Standard specifies the test method for closed-end internal pressure burst
of zirconium tubes at room temperature of 10 °C ~ 35 °C.
This Standard applies to the closed-end internal pressure burst test of
zirconium tubes at room temperature of 10 °C ~ 35 °C, and is used for the
determination of bursting strength and percent total circumferential elongation
at the crevasse of zirconium tubes at room temperature.
2 Normative references
The following documents are indispensable for the application of this document.
For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
document.
GB/T 8170, Rules of rounding off for numerical values and expression and
judgment of limiting values
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1 Maximum fluid pressure
The maximum pressure value of the fluid acting on the end of the sample,
during the entire loading process of the test.
3.2 Bursting strength
The maximum stress value that is measured when the sample suddenly bursts,
when the tube sample is subject to a burst test and a pressure is continuously
applied through a liquid or other medium.
5.2.3 The pumping system shall be rigid, and its energy storage shall be as low
as possible according to the actual situation. There shall be no pressure
fluctuations in each stroke of the pump.
5.3 Valve
The various valves in the testing machine shall have the functions of controlling
and adjusting the pressure, and shall be able to ensure the safety of the test.
5.4 Pressure transmitter
5.4.1 The pressure transmitter shall have sufficient capacity to monitor the
pressure of the system, and to ensure that the test software records the
maximum fluid pressure reached during the test.
5.4.2 The measurement accuracy of the pressure transmitter shall be level-0.5
or better; the verification period shall not exceed 12 months.
5.4.3 The data collection location of the pressure transmitter shall be as close
as possible to the sample.
5.5 Dimension measuring tools
5.5.1 Use an outside micrometer or other measuring tools of equivalent
accuracy for the outer diameter measurement; the accuracy of the measuring
tool shall not be less than 0.005 mm.
5.5.2 Use a micrometer for measuring pipe wall thicknesses or other measuring
tools of equivalent accuracy for the wall thickness measurement; the accuracy
of the measuring tool shall not be less than 0.005 mm.
5.5.3 Use a vernier caliper or other measuring tools of equivalent accuracy to
measure the circumference after breaking; the accuracy of the measuring tool
shall not be less than 0.05 mm.
6 Sample
6.1 General requirements
6.1.1 The sample cutting location and quantity shall be implemented in
accordance with the relevant product technical requirements. The cut can be
chamfered and deburred, but there shall be no deformation.
6.1.2 The sample cutting length shall be able to ensure that the unsupported
length is not less than 10 times the nominal outer diameter of the sample.
6.2 Sample preparation