BS EN 12351-2010 pdf download.Industrial valves Protective caps for valves with flanged connections.
This BS EN 12351 does not apply to protective caps for valves and pipe fittings with welded and threaded ends.
NOTE It is possible 10 use these protective caps with flanged components other than valves.
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.
EN ISO 1043-1, Plastics — Symbols arid abbreviated terms — Part 1: Basic polymers and their special characteristics (ISO 1043-1:2001)
ISO 1629, Rubbers and latices — Nomenclature
3 Requirements
3.1 The protective caps shall completely cover the port and the sealing surface of the flange and shall prevent damage.
The design of caps shall be such that when fitted to flanges, they remain attached during normal handling, transport and storage until they are removed before installation of the valve.
3.2 The protective caps shall fit so tightly that no foreign matter and coarse dirt can penetrate which would impede the correct function of the protected part.
Caps shall not be watertight or airtight.
3.3 The protective caps shall be designed in such a way that the installation of the valve without removal of the protective cap shall be impossible.
3.4 It is recommended that bright signal colours be used, preferably yellow or red. If a particular colour is required it shall be indicated in the order.
4 Design
The design may be at the option of the manufacturer and shall comply with the requirements of Clause 3. Examples of protective caps are shown in Annex A and are provided for information only.
5 Materials
Materials shall be compatible with the matenal of the valve and shall not cause contamination or corrosion of the valve,
NOTE In the range of ON 10 to DN 300 plastic or rubber matenals are preferred.
6 Marking
Caps which are intended to be re-used shall be marked as follows:
reference to this European Standard, i.e. EN 12351:
either ON or NPS:
either PN or Class;
material (for recycline purposes) according to EN ISO 1043-1 and ISO 1629.
NOTE Protective caps which are used at different nominal pressures (PN) can be marked with the nominal presswe (PN) range instead of one particular nominal pressure (PN).BS EN 12351-2010 pdf download.