TB/T 1632.1-2014 PDF English
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Welding of rails - Part 1: General
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The rail welding - Part 1: General technical conditions
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(Rail welded joint technical conditions)
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TB/T 1632.1-2014: Welding of rails - Part 1: General---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/TBT1632.1-2014
TB
RAILWAY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 45.120
S 17
Replacing TB/T 1632.1-2005
Welding of rails - Part 1.General specification
Issued on. OCTOBER 30, 2014
Implemented on. MAY 01, 2015
Issued by. Ministry of Railway of PRC
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Requirements for rails for welding... 8
5 Requirements for flaw detection of welded joints... 8
6 Requirements for straightness and surface quality of welded joints... 9
7 Inspection methods for straightness and surface quality of welded joints... 11
8 Flaw detection method... 12
9 Drop weight test method... 12
10 Static bending test method... 12
11 Fatigue test method... 13
12 Tensile test method... 14
13 Impact test method... 15
Appendix A (Normative) Technical specification for ultrasonic flaw detection of rail
welded joints... 17
Appendix B (Normative) Rail drop weight testing machine... 24
Appendix C (Normative) Rail static bending test machine... 25
Appendix D (Normative) Fatigue testing machine... 27
Foreword
TB/T 1632 "Welding of rails" is divided into four parts.
- Part 1.General specification;
- Part 2.Flash butt welding;
- Part 3.Thermit welding;
- Part 4.Gas pressure welding.
This Part is Part 1 of TB/T 1632.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces TB/T 1632.1-2005 "Welding of rails - Part 1.General specification".
Compared with TB/T 1632.1-2005, the main technical changes are as follows.
- MODIFY the terms and definitions (see Chapter 3; Chapter 3 of the 2005 edition);
- MODIFY the requirements for ultrasonic flaw detection (see Chapter 5; Chapter 5
of the 2005 edition);
- MODIFY the requirements for straightness of welded joints and inspection
methods for straightness (see 6.1 and 7.1; 6.1 and 7.1 of the 2005 edition);
- MODIFY the requirements and test methods for surface roughness of welded joints
(see 6.2.1 and 7.2.2; 6.2.1 and 7.2.2 of the 2005 edition);
- MODIFY the sampling position of heat-treated rail tensile test (see 12.1; 11.1 of
the 2005 edition);
- MODIFY the sampling position of the impact test (see 13.1; 12.1 of the 2005
edition);
- MODIFY the Appendix A "Technical specification for ultrasonic flaw detection of
rail welded joints" (see Appendix A; Appendix A of the 2005 edition).
This part was proposed by AND shall be under the jurisdiction of the Institute of
Standards and Metrology of the Ministry of Railways.
Drafting organizations of this Part. Institute of Metals and Chemistry of China Academy
of Railway Sciences, Institute of Standards and Metrology of Ministry of Railways.
The main drafters of this section. Gao Wenhui, Gao Donghai, Zhou Qingyue, Zhu Mei.
Participating drafters of this section. Li Lianxiu, Li Li, Wang Shuqing, Tu Zhankuan.
This standard replaces the standard previously issued as follows.
- TB/T 1632-1991;
- TB/T 1632.2-1997;
- TB/T 1632.1-2005.
Welding of rails - Part 1.General specification
1 Scope
This Part of TB/T 1632 specifies the terms and definitions, requirements for welding
rails, flaw detection requirements for welded joints, straightness and surface quality
requirements for welded joints of railway rail welding; inspection methods for
straightness and surface quality for welded joints, flaw detection inspection methods,
drop weight, static bending, fatigue, tensile, impact test methods.
This Part is applicable to new steel rails of 50 kg/m ~ 75 kg/m, which is welded by
methods such as flash welding, thermite welding, gas pressure welding.
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 reference
documents, the latest version (including all amendments) applies to this document.
GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1.Method of test at room
temperature
GB/T 229-2007 Metallic materials - Charpy pendulum impact test method
GB/T 2650-2008 Impact test methods on welded joints
GB/T 2651-2008 Tensile test method on welded joints
JB/T 10061-1999 Commonly used specification for A-mode ultrasonic flaw detector
using pulse echo technique
JB/T 10062-1999 Testing methods for performance of probes used in ultrasonic flaw
detection
TB/T 2344-2012 Technical specifications for the procurement of 43 kg/m ~ 75 kg/m
as rolled rails
TB/T 3276-2011 Rails for high speed railway
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Stationary flash-butt welding
Use the flash welder to weld the rails, at the welding station of the base or workshop
rail welding line, wherein the welding power supply is supplied by the power grid
through the distribution transformer.
3.2
Mobile flash-butt welding
Use the flash welder to weld the rails on the work site, wherein the welder and its
supporting equipment is powered by an independent vehicle-mounted generator set.
3.3
Gas pressure welding
A welding method, in which a steel rail is heated with a gas flame and a firm joint
is obtained under pressure.
4 Requirements for rails for welding
The hot-rolled rails or on-line heat-treated rails used for welding shall comply with the
requirements of TB/T 2344-2012.
5 Requirements for flaw detection of welded joints
5.1 Qualification requirements for flaw detection personnel
Flaw detectors shall have technical qualifications of level II or above for non-
destructive testing in the railway industry, AND have passed technical training on flaw
detection of rail welded joints.
5.2 Ultrasonic flaw detection requirements
5.2.7 During flaw detection, the flaw detection sensitivity can be increased by 4 dB ~ 6
dB for scanning.
5.2.8 When using the 0° probe to detect the thermite welded joint, if the bottom wave
is 16 dB or more lower than the normal welded joint OR if the welded joint has the
following defects, the welded joint shall be rejected.
5.2.9 See Appendix A for other requirements of ultrasonic flaw detection.
5.3 Requirements for surface flaw detection requirements
It should use surface flaw detection methods, such as magnetic particle, penetration,
eddy current, to detect cracks on the surface of joints.
6 Requirements for straightness and surface quality of welded joints
6.1 Straightness requirements
See Table 1 for the straightness requirements of the 1 m length of the rail head working
face of the rail welding joint; no low joints shall appear.
6.2 Surface quality requirements
6.2.1 After the shape finishing of the welded joint is finished, within 1 m of the weld
seam as the center, the surface roughness of the top surface of the rail shall meet the
following requirements. no more than 0.2 mm in any 200 mm section; when the design
speed v > 160 km/h, it should not be greater than 0.1 mm in any 100 mm section. (There
is no surface roughness requirement for the pits in the unground area of the base metal
surface).
6.2.2 There shall be no cracks, obvious indentations, scratches, bruises, electrode burns,
grinding burns, or other damages on the welded joints and the surface of the nearby
rails. The grinding depth of base metal should be less than 0.5 mm.
7 Inspection methods for straightness and surface quality of welded joints
7.1 Straightness inspection method
7.1.1 The measurement positions for the straightness of welded joints are respectively.
the longitudinal centerline of the top surface of the rail, the longitudinal line at 16 mm
from the rail surface of the rail on the working edge of the side of the rail head; the
measurement shall be at the rail surface at 500 mm positions on both sides of the
centerline of the weld as the reference point; the measurement length is 1 m; the weld
is centered.
7.2 Surface quality inspection method
7.2.1 Visual inspection for surface defects.
7.2.2 The inspection of surface roughness is divided into the following two methods.
8 Flaw detection method
The method of flaw detection shall be carried out, in accordance with the provisions in
Appendix A.
9 Drop weight test method
9.1 Test piece
9.1.1 The straightness and surface quality of the test piece shall comply with the
provisions in Chapter 6.
9.2 Test temperature
The temperature of the test piece is 10 °C ~ 50 °C. When the test environment
temperature is lower than 10 °C, the temperature of the test piece shall be close to 50 °C.
9.3 Drop weight testing machine
The requirements for the drop weight testing machine shall comply with the provisions
in Appendix B.
TB/T 1632.1-2014
TB
RAILWAY INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 45.120
S 17
Replacing TB/T 1632.1-2005
Welding of rails - Part 1.General specification
Issued on. OCTOBER 30, 2014
Implemented on. MAY 01, 2015
Issued by. Ministry of Railway of PRC
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Requirements for rails for welding... 8
5 Requirements for flaw detection of welded joints... 8
6 Requirements for straightness and surface quality of welded joints... 9
7 Inspection methods for straightness and surface quality of welded joints... 11
8 Flaw detection method... 12
9 Drop weight test method... 12
10 Static bending test method... 12
11 Fatigue test method... 13
12 Tensile test method... 14
13 Impact test method... 15
Appendix A (Normative) Technical specification for ultrasonic flaw detection of rail
welded joints... 17
Appendix B (Normative) Rail drop weight testing machine... 24
Appendix C (Normative) Rail static bending test machine... 25
Appendix D (Normative) Fatigue testing machine... 27
Foreword
TB/T 1632 "Welding of rails" is divided into four parts.
- Part 1.General specification;
- Part 2.Flash butt welding;
- Part 3.Thermit welding;
- Part 4.Gas pressure welding.
This Part is Part 1 of TB/T 1632.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces TB/T 1632.1-2005 "Welding of rails - Part 1.General specification".
Compared with TB/T 1632.1-2005, the main technical changes are as follows.
- MODIFY the terms and definitions (see Chapter 3; Chapter 3 of the 2005 edition);
- MODIFY the requirements for ultrasonic flaw detection (see Chapter 5; Chapter 5
of the 2005 edition);
- MODIFY the requirements for straightness of welded joints and inspection
methods for straightness (see 6.1 and 7.1; 6.1 and 7.1 of the 2005 edition);
- MODIFY the requirements and test methods for surface roughness of welded joints
(see 6.2.1 and 7.2.2; 6.2.1 and 7.2.2 of the 2005 edition);
- MODIFY the sampling position of heat-treated rail tensile test (see 12.1; 11.1 of
the 2005 edition);
- MODIFY the sampling position of the impact test (see 13.1; 12.1 of the 2005
edition);
- MODIFY the Appendix A "Technical specification for ultrasonic flaw detection of
rail welded joints" (see Appendix A; Appendix A of the 2005 edition).
This part was proposed by AND shall be under the jurisdiction of the Institute of
Standards and Metrology of the Ministry of Railways.
Drafting organizations of this Part. Institute of Metals and Chemistry of China Academy
of Railway Sciences, Institute of Standards and Metrology of Ministry of Railways.
The main drafters of this section. Gao Wenhui, Gao Donghai, Zhou Qingyue, Zhu Mei.
Participating drafters of this section. Li Lianxiu, Li Li, Wang Shuqing, Tu Zhankuan.
This standard replaces the standard previously issued as follows.
- TB/T 1632-1991;
- TB/T 1632.2-1997;
- TB/T 1632.1-2005.
Welding of rails - Part 1.General specification
1 Scope
This Part of TB/T 1632 specifies the terms and definitions, requirements for welding
rails, flaw detection requirements for welded joints, straightness and surface quality
requirements for welded joints of railway rail welding; inspection methods for
straightness and surface quality for welded joints, flaw detection inspection methods,
drop weight, static bending, fatigue, tensile, impact test methods.
This Part is applicable to new steel rails of 50 kg/m ~ 75 kg/m, which is welded by
methods such as flash welding, thermite welding, gas pressure welding.
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 reference
documents, the latest version (including all amendments) applies to this document.
GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1.Method of test at room
temperature
GB/T 229-2007 Metallic materials - Charpy pendulum impact test method
GB/T 2650-2008 Impact test methods on welded joints
GB/T 2651-2008 Tensile test method on welded joints
JB/T 10061-1999 Commonly used specification for A-mode ultrasonic flaw detector
using pulse echo technique
JB/T 10062-1999 Testing methods for performance of probes used in ultrasonic flaw
detection
TB/T 2344-2012 Technical specifications for the procurement of 43 kg/m ~ 75 kg/m
as rolled rails
TB/T 3276-2011 Rails for high speed railway
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Stationary flash-butt welding
Use the flash welder to weld the rails, at the welding station of the base or workshop
rail welding line, wherein the welding power supply is supplied by the power grid
through the distribution transformer.
3.2
Mobile flash-butt welding
Use the flash welder to weld the rails on the work site, wherein the welder and its
supporting equipment is powered by an independent vehicle-mounted generator set.
3.3
Gas pressure welding
A welding method, in which a steel rail is heated with a gas flame and a firm joint
is obtained under pressure.
4 Requirements for rails for welding
The hot-rolled rails or on-line heat-treated rails used for welding shall comply with the
requirements of TB/T 2344-2012.
5 Requirements for flaw detection of welded joints
5.1 Qualification requirements for flaw detection personnel
Flaw detectors shall have technical qualifications of level II or above for non-
destructive testing in the railway industry, AND have passed technical training on flaw
detection of rail welded joints.
5.2 Ultrasonic flaw detection requirements
5.2.7 During flaw detection, the flaw detection sensitivity can be increased by 4 dB ~ 6
dB for scanning.
5.2.8 When using the 0° probe to detect the thermite welded joint, if the bottom wave
is 16 dB or more lower than the normal welded joint OR if the welded joint has the
following defects, the welded joint shall be rejected.
5.2.9 See Appendix A for other requirements of ultrasonic flaw detection.
5.3 Requirements for surface flaw detection requirements
It should use surface flaw detection methods, such as magnetic particle, penetration,
eddy current, to detect cracks on the surface of joints.
6 Requirements for straightness and surface quality of welded joints
6.1 Straightness requirements
See Table 1 for the straightness requirements of the 1 m length of the rail head working
face of the rail welding joint; no low joints shall appear.
6.2 Surface quality requirements
6.2.1 After the shape finishing of the welded joint is finished, within 1 m of the weld
seam as the center, the surface roughness of the top surface of the rail shall meet the
following requirements. no more than 0.2 mm in any 200 mm section; when the design
speed v > 160 km/h, it should not be greater than 0.1 mm in any 100 mm section. (There
is no surface roughness requirement for the pits in the unground area of the base metal
surface).
6.2.2 There shall be no cracks, obvious indentations, scratches, bruises, electrode burns,
grinding burns, or other damages on the welded joints and the surface of the nearby
rails. The grinding depth of base metal should be less than 0.5 mm.
7 Inspection methods for straightness and surface quality of welded joints
7.1 Straightness inspection method
7.1.1 The measurement positions for the straightness of welded joints are respectively.
the longitudinal centerline of the top surface of the rail, the longitudinal line at 16 mm
from the rail surface of the rail on the working edge of the side of the rail head; the
measurement shall be at the rail surface at 500 mm positions on both sides of the
centerline of the weld as the reference point; the measurement length is 1 m; the weld
is centered.
7.2 Surface quality inspection method
7.2.1 Visual inspection for surface defects.
7.2.2 The inspection of surface roughness is divided into the following two methods.
8 Flaw detection method
The method of flaw detection shall be carried out, in accordance with the provisions in
Appendix A.
9 Drop weight test method
9.1 Test piece
9.1.1 The straightness and surface quality of the test piece shall comply with the
provisions in Chapter 6.
9.2 Test temperature
The temperature of the test piece is 10 °C ~ 50 °C. When the test environment
temperature is lower than 10 °C, the temperature of the test piece shall be close to 50 °C.
9.3 Drop weight testing machine
The requirements for the drop weight testing machine shall comply with the provisions
in Appendix B.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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