CONTENTS

1 Introduction
2 Scope
3 Selection of rails to be welded
4 Execution of joints at site.
5 Operations subsequent to welding
6 Acceptance tests
7 Sample test joint
8 Other requirements
9 Precautions
10 Defects in A.T. welding
Annexure-1    Status of A.T. welding techniques
Annexure-2 List of Equipments for Alumino thermic welding of rail joints by short preheating process     per welding team
Annexure-3  Composition of thermit welding team (Compressor tank wise)
Annexure-4   List of approved suppliers of Rail  profile weld grinder & Weld trimmer
Annexure-5 Proforma for THERMIT WELD REGISTER
Annexure-6 Procedure for painting of weld collar  for thermit welded rail joints to protect against normal corrosion
Annexure-7 Procedure for painting of weld collar  for thermit welded rail joints to protect against severe corrosion
Annexure-8 Procedure for Ultrasonic testing of  Alumino-thermic rail joints
Annexure-9 Extracts from IRST-19-1994, Clause 4.2  on Mechanical & Metallurgical tests on test welds and Retests
Annexure-10 Major defects in A.T. welding because of improper weld execution
Figure 3.1(a) Tolerance on the End bends in the Vertical-plane
Figure 3.1(b) & (c) Tolerance on the End bends in the Horizontal plane
Figure 4.7.1.1 (a) & (b  Tolerance for Lateral alignment at the time of welding
Figure 4.7.1.2  Tolerance for Vertical alignment at the time of welding
Figure 5.1 Details of Insulation hood
Figure 5.4.2 Tolerances on finished welds