BS/EN 1514-2-2014 pdf download.Flanges and their joints Gaskets for PN-designated flanges
Part 2: Spiral wound gaskets for use with steel flanges.
This part of EN 1514 specifies the dimensions and marking of spiral wound gaskets for use in conjunction with
flat face and raised face flanges complying with the requirements of EN 1092-1 for PN 10, PN 16, PN 25,
PN 40, PN 63, PN 100 and PN 160 and up to and including DN 1 000.
NOTE 1 Dimensions of other types of gaskets for use with flanges to EN 1092-1, EN 1092-2, EN 1092-3 and EN 10924 are given in EN 1514-1, EN 1514-3, EN 15144, EN 1514-6, EN 1514-7 and EN 1514-8.
NOTE 2 Annex A lists information to be supplied by the purchaser when ordering gaskets in circumstances where the choice of the gasket materials appropriate to the service is left to the manufacturer.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1333. Flanges and their joints – Pipework components – Definition and selection of PN
EN ISO 6708, Pipework components – Definition and selection of DN (nominal size) (ISO 6708)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ON
alphanumeric designation of size for components of a pipework system, which is used for reference purposes.
It comprises the letters DN followed by a dimensionless whole number which is indirectly related to the
physical size, in millimetres, of the bore or outside diameter of the end connections
Note I to entry: The number following the letters ON does not represent a measurable value and should not be used for calculation purposes except where specified in the relevant standard.
Note 2 to entry: In those standards which use the DN designation system, any relationship between ON and component dimensions should be given (e.g. DN/OO or DN!ID).
Note 3 to entry: The preferred DN values are:
e) PN63;
f) PN 100;
g) PN 160.
4.3 Range of DN (nominal sizes)
Gasket nominal sizes shall be designated in accordance with the ranges specified in Table 2.
4.4 Gasket types
Gasket types are shown in Clause 6 and illustrated in Figure 1.
4.5 Information to be supplied by the purchaser
Where the purchaser requires the manufacturer to specify the materials of the gasket, then the minimum information that shall be supplied to the manufacturer with the order is given in Annex A.
5 Gasket designs
Gaskets for which dimensions are specified shall be of one of the designs shown In Figure 1.
The clearance between the sealing element and the centring ring shall be as shown in Figure 2.
NOTE I Figure 1 shows a typical design of a metallbc spiral wound gasket and, for use with type A or type B flanges. NOTE 2 Type A and type B flange facings are illustrated in EN 1092-1.
NOTE 3 The pofile of the metal winding of the sealing element is at the option of the manufacturer. The materials of the gasket may be specified either by:
a) the purchaser; or
b) if required by the purchaser, by the manufacturer to suit the application operating conditions. In this case, the purchaser shall define the operating conditions in the enquiry and/or order (see Annex A).
The attention of the user is drawn to the load necessary to compress spiral wound gaskets and the available load with PN 10 flanges should be verified as adequate prior to using these gaskets.
6 Gasket types
Gaskets shall be either:
a) Type C/I having a sealing element with centring ring and inner ring; or
b) Type C/O having a sealing element with centring ring. All gaskets shall have a centring ring.
All PN 63, PN 100 and PN 160 gaskets shall have an inner ring. All gaskets containing PTFE filler material shall have an inner ring.
The use of an inner ring is recommended for all PN designations and the purchaser shall specify on the enquiry and/or order if an inner ring is required for PN 10, PN 16, PN 25 and PN 40 gaskets (see Annex A). The selection of gasket type should take into account the fluids, the operating conditions, the properties of the gasket materials, the type and surface finish of the flange facing and the flange bolt loading. It is recommended that selection of gaskets for any particular application is made in consultation with the gasket supplier (see Annex A).
7 Dimensions
The dimensions of spiral wound gaskets for Types A and B flange facings shall be as given in Table 2 and the overall thickness. including filler, shall be as given in Figure 2.BS/EN 1514-2-2014 pdf download.