BS EN 12351:2010 pdf free download Industrial valves — Protective caps for valves with flanged connections
This European Standard specifies protective caps for flanged valves with and without internal coating.
The use of protective caps according to this European Standard is limited to the protection during transport andstorage to prevent:
the entry of dirt;
the damage of the connecting surfaces.
The protective caps do not protect against the consequences of improper handling.
This European Standard does not apply to protective caps for valves and pipe .fitings with welded and threadedends.
NOTE lt is possible to use these protective caps with flanged components other than valves.
Normative references
The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies. For undated references,the latest edition of the referenceddocument (including any amendments) applies.
EN ISO 1043-1,Plastics — Symbols and abbreviated terms —- Part 1: Basic polymers and their specialcharacteristics (lSO 1043-1:2001)
ISO 1629,Rubbers and latices — Nomenclature
3Requirements
3.1The protective caps shall completely cover the port and the sealing surface of the flange and shall preventdamage.
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.
3.2The protective caps shall fit so tightly that no foreign matter and coarse dirt can penetrate which wouldimpede the correct function of the protected part.
Caps shall not be watertight or airtight.
3.3The protective caps shall be designed in such a way that the installation of the valve without removal ofthe protective cap shall be impossible.
3.4lt is recommended that bright signal colours be used, preferably yellow or red. lf a particular colour isrequired it shall be indicated in the order.
4Design
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 material of the valve and shall not cause contamination or corrosion of the valve.
NOTE
In the range of DN 10 to DN 300 plastic or rubber materials 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 DN 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 pressure (PN) range instead of one particular nominal pressure (PN).