Equipment category calculator according to CU TR 032/2013

How to use «Equipment Category Calculator»:
Step 1. Define equipment type
VESSEL – the hermetically sealed container (permanently installed or mobile) designed to conduct chemical, thermal and other processes, as well as for storage and transport of gaseous, liquid and other substances;
BOILER – a device designed for water heating or generating steam at a pressure exceeding atmospheric pressure and used outside of this device;
PIPELINE – a set of parts and assembly units of pipes with elements, which are their components (tees, cones, L-bones, valves), which are designed for transportation of medium from the source to the consumers.
Step 2. Define working mediums group
GROUP 1 includes working mediums consisted from flammable, oxidizable, combustible, explosive, toxic and high-toxic gasses, liquids and vapors in the single-phase state and also their mixtures;
GROUP 2 includes all other working mediums, which do not refer to group 1.
Step 3. Indicate volume (capacity) or nominal size (DN)
VOLUME/CAPACITY (for vessels and boilers) – the volume of the internal cavity of the equipment, determined according to nominal sizes from the drawings
OR
NOMINAL DIAMETER, NOMINAL INSIDE DIAMETER (for pipelines and valves) – a numerical designation of size equal to the rounded value of the inner diameter, which is indicated for all components of the equipment except components indicated by the outer diameter or the size of the thread.
Step 4. Indicate design pressure
DESIGN PRESSURE – maximum pressure, on which the equipment optimized, calculated by manufacturer.

NOTE:

1. Category of equipment with different cavities is the highest category defined for each cavity separately.

2. The group of media mixture is determined by the most hazardous media.

3. Equipment elements (assembly units) and their components that withstand pressure, indicating and safety devices, safety devices and instruments are classified in category 4. If they are manufactured (produced) for specific equipment, they may be classified in the same category as the equipment for which they are manufactured (produced).

4. If the equipment is intended for different working medias of the same group or for working environments of different groups, it is classified according to the category of the largest group defined for each working media.

5. Attention! According to Appendix 1 of CU TR 032/2013 equipment category is increased by 1 (except for category 4), if it is intended for operation with a design wall temperature of:

380°C and more – for carbon and low-alloy manganese and silicon-manganese steels;

450°C and more – for low-alloy chromium-molybdenum and chromium-molybdenum-vanadium steels;

525°C and more – for alloyed high-chromium martensitic and austenitic steels;

575°C and more – for iron-nickel-based alloys;

600°C and more – for nickel-based alloys