TS 12740-2

TS 12740-2 is a terminology standard focused on the nomenclature of parts used in railway vehicles. Standards of this kind help prevent different names from being used for the same component, improve clarity in technical communication, and establish a common language for design, maintenance, operations, and documentation.

Why part nomenclature matters in railway engineering

Railway vehicles are made up of many subassemblies, including the body, running gear, braking system, doors, interior fittings, and numerous connecting elements. Terminology standards define how these parts are systematically named and reduce the risk of confusing components that may look similar but perform different functions. That is especially important in drawings, technical specifications, spare-part catalogues, and fault records.

The scope of this standard is the naming of parts used in railway vehicles. Read together with TS 12740-1, it forms part of a broader terminology framework; as with other terminology standards, the emphasis is on consistent use of terms rather than on physical dimensions or performance requirements. In practice, this kind of approach supports mutual understanding across manufacturers and railway operators.

Practical value of terminology standards

• Reduces the use of different names for the same part in drawings and catalogues.
• Makes maintenance and repair records more consistent.
• Helps avoid confusion in procurement, storage, and spare-parts management.
• Supports a shared technical language across engineering teams.

Because this is a nomenclature standard, its main value lies in how parts are named consistently, not in defining the parts themselves. In railway technology, well-organized terminology makes complex systems easier to manage and helps keep documentation aligned.