EN 764-2-2012 pdf download.Pressure equipment-Part 2 : Quantities , symbols and units.
This EN 764-2 specifies the basic quantities, symbols and units to be used for pressure equipment and assemblies addressed by the European Directive 97123/EC.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references the latest edition of the referenced document (including any amendments) applies.
ISO 80000-1, Quantities and units — Part 1: General
ISO 80000-2. Quantities and units — Part 2: Mathematical signs and symbols to be used in the natural sciences and technology
ISO 80000-3. Quantities and units — Part 3: Space and time
ISO 80000-4, Quantities and units — Part 4: Mechanics
ISO 80000-5. Quantities and units Part 5: Thermodynamics
ISO 80000-11, Quantities and units — Part 11: Characteristic numbers
3 General
3.1 All units used for pressure equipment shall be derived from the base units of the international system of
Units (SI) in accordance with ISO 80000.1, ISO 80000-2. ISO 80000-3, ISO 80000-4. ISO 80000-5, and
ISO 80000-11 unless otherwise prescribed in the European Directive 97/23/EC.
3.2 The choice of the appropriate multiple (decimal multiple or sub-multiple) of unit is governed by convenience, the multiple chosen for a particular application being one which would lead to numerical values within a practical range. Therefore when indicating quantities it is recommended to choose decimal multiple or sub multiple quantities such that the resulting values are easy to handle, e.g. between 0.1 and 1 000.
4 Quantities, symbols and units
Symbols and units for the quantities used in pressure equipment shall be in accordance with Tables 1 and 2, otherwise according to ISO 80000 series for other quantities and in particular ISO 80000-5 for thermodynamic quantities.EN 764-2-2012 pdf download.

Share on Facebook

Post on X

Follow us

Save