Valid

TB 10118-2006Code for design for applications of geosynthetics on subgrade of railway (English PDF)

Preview PDF

Also coversTB10118-2006

This is a limited preview

Buy now to download the full PDF (15 pages)

Need quotation for your management?

Get a formal quotation for TB 10118-2006 in 30 minutes.

Issued by

Ministry of Railway of PRC

Level / Type

National · Mandatory

Issue date

October 30, 2014

Implementation date

May 1, 2015

Scope

TB 10118-2006 (Code for design for applications of geosynthetics on subgrade of railway) is available as an English-translated PDF.

TB 10118-2006 — 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.

Found what you need?

Document preview — TB 10118-2006

National Standard of the People's Republic of China

ICS: 45.120
Classification: S 17

Issued by: Ministry of Railway of PRC

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

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.

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

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