The main tasks of the DIN Standards Committee for Process and Plant Technology (NAPA) are consensus-oriented standardization work, combined with the extensive coordination of its specialist areas with other standards committees. This is mainly done with the DIN Standards Committee Water Practice (NAW), Iron and Steel (FES), Valves (NAA), Welding and allied processes (NAS) and Food and Agricultural Products (NAL).

The NAPA is responsible for national, European and international standardization in the field of process and plant engineering, in particular for:

• plants and plant components
• pipelines, pipeline components and connections (such as flanges, pipe fittings, gaskets, fittings, pipe screw connections, metal hose lines and expansion joints)
• Apparatus and piping made of glass
• tanks and apparatus made of glass fiber reinforced plastic
• steam boiler systems
• process plants
• beverage dispensing systems
• thermal energy storage systems for commercial and industrial applications

The standards in NAPA's area of responsibility include:

• terminology
• rules for design and calculation
• selection of materials
• requirements for planning, design, manufacture and execution, testing and documentation
• requirements for dimensions
• connection dimensions for pipe connection systems such as flange and socket connections, threaded and soldered connections, hose couplings, pipe fittings and welded connections
• requirements and design examples for welding technology
• requirements for surface protection (including enameling)
• application-related specifications, e. g. piping for pigging systems, cement mortar linings and coatings
• procurement guidelines for power plant equipment
• parameters for the comparability of thermal energy storage systems

Parts and components made of concrete and fiber cement as well as the technical design of thermal energy storage systems are outside the scope of responsibility.