IIS Group provides a wide range of integrated services in the field of railway vehicles and components and generally in the railroad industry. A brief description is given below, together with some references on main works performed by IIS.

Structural Integrity and Design

  • Design assessment (static and fatigue) of railway components and welded joints
    (see case history)
  • Optimization of structural welded details
    (see case history)
  • Fatigue testing procedures of typical welded structural details of railway components (e.g. resistance spot welds)
    (see case history)
  • Revision of technical specifications according to AWS Codes (AWS D1.1, D1.2, D.3, D1.6, D15.1, etc..) and / or EN 15085 standard for all the different aspects involved in the fabrication and erection of carbon steel / stainless steel / aluminium alloy structures (design, qualification, fabrication and inspection). Comparative studies between EN Standards and AWS Codes.
    (see case history)

Laboratory tests

  • Fatigue tests for the evaluation of the fatigue strength of welded joints
  • Chemical and mechanical tests for the material characterization. 


  • Verification and optimization of UT procedures on rolling stock components by means of a simulation software
  • Definition of most suitable NDE techniques in order to assess the structural integrity of railway car components.
    (see case history)

Technical Assistance

  • Preparation of welding and repair procedures on railway components with defects induced by service
    (see case history)
  • Supervision of welding and NDE operations during repair activities.

Coating and Painting
Technical assistance for preparation of painting/coating procedures.

  • Coating/Painting inspection by lev. 2 and 3 NACE and FROSIO inspectors
  • Second/Third party inspection
  • Laboratory test on coating and coatin/painting procedures approval.


  • Certification of welding fabrication process for railway rolling stock (EN 15085)
  • Evaluation of CE conformity of products according to Directive 2008/57/EC on the interoperability of the Trans-European Railway System: the notification covers the following subsystems: Rolling Stock, Infrastructure, Control, Command and Signalling onboard and trackside, Maintenance and Telematics Applications (Passengers and Goods Wagons). The notification is extended to the entire Trans-European Railway System: High Speed Transportazion System and Conventional Transportation System.   



The testing machines in the Italian Institute of Welding Group’s Laboratory allow to carry out the following  tests for the charcterization of... >

The Italian Institute of Welding Group is able to carry out tests for characterizing the fatigue strength of materials,... >

IIS CERT provides assessment services in the field of the European rail interoperability directive (2008/57 / EC) and in the... >

IIS Group boasts a longstanding experience in Welding Inspection activities.

IIS SERVICE, through its Engineering Department, is involved in assessments of fatigue life in the field of structures and structural components... >

IIS SERVICE operates in field carrying our surface and volumetric non destructive testing, through its... >

IIS SERVICE provides technical and scientific advice for design, fabrication, inspection issues.

In addition to the traditional chemical and physical tests, the Italian Institute of Welding Group Laboratory is able to... >

In the field of the welding fabrication of railway vehicles, the standard EN 15085 without any doubt has a fundamental... >