EN 12560-6 PDF

Find the most up-to-date version of DS/EN at Engineering BS EN Flanges and their joints. Gaskets for class-designated flanges. Covered serrated metal gaskets for use with steel flanges. DIN EN Flanges and their joints – Gaskets for class-designated flanges – Part 6: Covered serrated metal gaskets for use with steel.

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A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users 125560-6 responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document 1256-06 when the document was last issued. Amendments issued since publication Amd.

Grooved Gaskets EN

Date Comments Li ce ns ed C op y: Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member.

A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Juneand conflicting national standards shall be withdrawn at the latest by June The annex A is informative and contains “Information to be supplied by the purchaser”.

The annex B is informative and contains “The use of metric bolting with class designated covered serrated metal gaskets”.

EN – European Standards

This document includes a Bibliography. EN consists of 7 parts: Non-metallic flat gaskets with or without inserts Part 2: Spiral wound gaskets for use with steel flanges Part 3: Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges Part 5: Metallic ring joint gaskets for use with steel flanges Part 6: Covered serrated metal gaskets for use with steel flanges Part 7: This document does not extend to serrated covered metal based heat exchanger gaskets with pass bars or large vessel gaskets but, in the lack of a dedicated document for such gaskets, the principles set down can be applied to them.

NOTE 2 Annex A lists information that should 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 supplier. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision.

For undated references the latest edition of the publication referred to applies including amendments. The sealing element consists of a metal core with serrated top and lower surfaces and a conformable sealing material adhered to each serrated surface.

The serrations into metal core have the function of creating regions of high surface pressure on the conformable sealing material to ensure the required level of tightness in service. The density of the sealing material in the serrations during service should also be high enough to ensure that secondary sealing is provided by the impermeable nature of the material between the tips of the serrations.

In service the thickness of the sealing material over the serrations is minimal, often about 0,1 mm. The widths of the tips of the serrations should also be of the order of 0,1 mm 3. The general principles described in this standard shall also be applied to gaskets outside of the range specified in Table 1 by agreement between supplier and customer.


Sealing element without any location ring. Sealing element with integral location ring. Sealing element with loose location ring. It is recommended that selection of a gasket for any particular application is made in consultation with the gasket supplier who will advise on the materials required for a particular service see annex A. Figure 2 shows a typical covered serrated metal gasket for use with type A and type B flanges, the Type A and B flange facings are specified in prEN The core thickness measured over the tips of the serrations shall be a minimum of three times the depth of the serrations.

The number of welds shall not be more than two.

The pitch of the serration and the width of the serration shall be arranged so that the width of the tips is 0,1 mm. The first and last tips of the serrated core should be as near as possible to the respective edges of the core.

Proprietary forms of serrations and core profiles may be used by agreement between the purchaser and manufacturer. To reduce the possibility of vibration induced cracking of the core, the radius at the bottom of the grooves shall be as large as possible. The location ring shall be undercut on at least one side to protect the sealing element in the event of thermal expansion induced interference between the location ring and the bolts of the flange.

When installed the ring shall be sufficiently loose in the location slot in the core so that thermal expansion effects never cause the ring to become tight in the location slot.

The location ring may be made in sections and assembled around the core. The sections of the assembled ring shall be either welded together or otherwise securely held together. The material of the loose location ring may be carbon steel.

Suitable materials range from very soft, rubber bound, sheet material to metal foils.

The facing material may be cut from sheet to the appropriate size, applied in the form of texturised tape or by any other means that meets the other requirements of this standard. The weight per unit area shall be 125600-6 that metal to metal contact between the tips of the serrations and the flange surface is avoided. Ignoring the effects of the thickness of any adhesive and the grooving of the flange surfaces, the target weight per unit area of facing can be estimated from the following: At joins the facing material shall be overlapped or the two parts chamfered 125606- where a butt joint is used, 12650-6 join may be overlapped with a thin layer of the tape.

The sealing face shall also be free of surface blemishes, defects and damage that would impair the sealing performance of the gasket. It is recommended that selection of gasket type of any particular application is in consultation with the gasket supplier see annex A.


Sealing element with no locating ring b Type IR: Sealing element with integral locating ring c Type LR: Sealing element with loose locating ring Figure 1 — Covered serrated metal gasket types with sealing facings Li ce ns ed C op y: The relevant colours that shall be used are shown in Table 2.

Where the thickness of the location ring is sufficient a continuous colour around the outer location ring shall identify the metallic sealing element core. Intermittent strips around the outer location ring shall identify the soft gasket covering layers. For sizes below NPS 1.

For sizes above NPS 1. Where the thicknesses do not allow the clear marking of the edge of the ring or the core then the marking shall be on the upper and lower surfaces of the location ring. Large diameter gaskets shall be securely mounted on a carrier board or within a protective framework. In this case it is recommended 125660-6 a colour code be agreed between the two parties.

This selection should take account of the fluid, the properties of the gasket materials, the service temperature and the flange type and flange materials. The following information should be supplied by the purchaser when ordering gaskets: EN b gasket type c nominal size — DN see Table 1 d class designation see Table 1 e required gasket materials or expected operating conditions for applications where the gasket manufacturer is required to select gasket materials f type, thickness and density of facing material g type of metal for core and, where appropriate, for the locating ring.


If using metric bolts in 1250-6 of imperial then the guidance notes on gasket assembly in B. Users should note that the centring of an inside bolt circle gasket in an assembled Class designated flange joint will be affected when using metric bolting. It 122560-6 essential therefore that great care be taken to ensure that gaskets are centred properly. However, with care, and dependent on the tolerances which have been used, it should be possible to fit the normal imperial dimensioned gasket when using metric bolting in existing imperial holes.

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BS EN 12560-6:2003

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This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. BS EN Flanges and their joints – Gaskets for Class-designated flanges – Corrugated, flat or grooved metallic and filled metallic gaskets for use with steel flanges.

BS EN Flanges and their joints – Gaskets for class-designated flanges – Covered metal jacketed gaskets for use with steel flanges.