TS ISO 1219-2

TS ISO 1219-2 is the standard that sets out how hydraulic and pneumatic circuit diagrams for fluid power systems are to be arranged. Rather than defining the symbols themselves, this part focuses on the consistent and readable presentation of those symbols and line connections so that system function, flow paths, and component relationships can be understood at a glance.

How the diagramming rules work

The standard is built on graphical symbols drawn in accordance with ISO 1219-1. In practice, that means there is a common symbol language for items such as valves, pumps, cylinders, compressors, filters, and related components, while this part provides the main rules for combining those symbols into circuit diagrams. In general technical use, disciplined schematic layout is important for maintenance, troubleshooting, design review, and equipment documentation.

Application areas covered

The scope is not limited to conventional hydraulic and pneumatic circuits. It also applies to circuit diagrams for cooling systems, lubrication systems, cooling lubricant systems, and technical gas systems used together with fluid power applications. This broader coverage helps related auxiliary systems be documented within the same engineering drawing discipline. The standard also includes example circuit diagrams, which provide practical illustrations of how the rules can be applied.

From a general technical standpoint, standards of this kind help different manufacturers and design teams read the same equipment in a comparable way. The result is a schematic language that makes functional relationships clearer, independently of the physical arrangement of the machine, and helps complex fluid power systems remain understandable.