SIST EN 10311:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Joints for the connection of steel tubes and fittings for the conveyance of water and other aqueous liquidsWHNRþLQAssemblages pour le raccordement de tubes en acier et raccords pour le transport d'eau et d'autres liquides aqueuxVerbindungen für Stahlrohre und Fittings für den Transport von Wasser und anderen wässrigen FlüssigkeitenTa slovenski standard je istoveten z:EN 10311:2005SIST EN 10311:2005en23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and jointsICS:SLOVENSKI
STANDARDSIST EN 10311:200501-september-2005

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10311May 2005ICS 23.040.60English versionJoints for the connection of steel tubes and fittings for theconveyance of water and other aqueous liquidsAssemblages pour le raccordement de tubes en acier etraccords pour le transport d'eau at d'autres liquides aqueuxVerbindungen für Stahlrohre und Fittings für den Transportvon Wasser und anderen wässrigen FlüssigkeitenThis European Standard was approved by CEN on 25 March 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10311:2005: E

Clauses of this European Standard addressing the provisions of the EU Construction Products Directive.22 Bibliography.27

Introduction This European Standard applies to joints for use with non-alloy steel tubular products for use with all types of aqueous liquids. In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) This European Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) It should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. Standards EN 1123-1 'Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water systems — Part 1: Requirements, testing, quality control' and EN 1123-2 'Pipes and fittings of longitudinally welded hot-dip galvanized steel pipes with spigot and socket for waste water system — Part 2: Dimensions' are also available for waste water systems which require galvanized tubes.

1 Scope This European Standard specifies a range of jointing methods for connecting low alloy steel tubes and steel tubes and fittings for use with aqueous liquids. The following specific joint types are covered by this document: butt welded joints, welded spigot and socket (or sleeve joints), welding collars, flange joints, threaded joints, spigot and socket joints with seal and mechanical couplings. This European Standard specifies requirements for the strength and integrity of the joints and the testing of the joints. This European Standard does not specify the requirements for the tubes or the fittings. This European Standard is suitable for joints intended for the conveyance of water for human consumption, after an appropriate coating has been applied. This European Standard is not intended for use in heating networks where elevated temperature properties are required. Flexible joints which permit significant angular deflection, both during and after installation and which can accept slight offset of the centre line, are not covered by this European Standard. 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 681-1, Elastomeric seals — Material requirements for pipe joint seals used in water and drainage applications — Part 1: Vulcanized rubber EN 1011-2, Welding — Recommendations for welding of metallic materials — Part 2: Arc welding of ferritic steels EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN designated — Part 1: Steel flanges EN 1591-1, Flanges and their joints — Design rules for gasketed circular flange connections — Part 1: Calculation method EN 1759-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, Class designated — Part 1: Steel flanges, NPS 1/2 to 24 EN 10224, Non-alloy steel tubes and fittings for the conveyance of aqueous liquids including water for human consumption - Technical delivery conditions EN 10226-1, Pipe threads where pressure tight joints are made on the threads — Part 1: Taper external threads and parallel internal threads - Dimensions, tolerances and designation prEN 10226-2, Pipe threads where pressure tight joints are made on the threads — Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation EN 10266:2003, Steel tubes, fittings and structural hollow sections — Symbols and definitions of terms for use in product standards

for each 25 mm on length of socket) NOTE All dimensions are in millimetres. 75 a
150 + 2Tb75 TTcc c) Type 2 (collar sleeve) NOTE All dimensions are in millimetres. Key
a For outside diameters ≤ 168,3 mm, the length indicated shall be ≤ 50 mm b For outside diameters ≤ 168,3 mm, the length indicated shall be 100 + 2T min c Workshop fabrication weld Figure 1 — Welded spigot and socket joints (these figures are idealised and do not take account of tolerances or site assembly conditions) 4.3 Welded collars An example of a welding collar is shown in Figure 2. Welding collars shall be at least equal in thickness to the adjoining components; the length of sleeve shall be not less than 250 mm.

12 a) Plate flange 122 b) Loose flange 122 c) Welded neck flange Key 1
Seal 2
Weld Figure 3 — Flange joints 4.5 Threaded joints The threads of threaded joints shall be in accordance with EN 10226-1 or prEN 10226-2. The manufacturer or supplier of the threaded joints shall obtain information at the time of enquiry and order confirming the appropriate part of EN 10226 required. NOTE 1 Threaded joints are normally made between tubes in accordance with EN 10255 and fittings in accordance with EN 10241 (steel) and/or EN 10242 (malleable cast iron). NOTE 2 An appropriate sealing material should be applied to the threads before making the joint.

As these types of joint can differ in detail from one manufacturer to another, the manufacturer shall define the principal dimensions at the time of enquiry and order. These dimensions shall be measured, using appropriate equipment, and values shall be as stated, subject to the manufacturers stipulated tolerances.
NOTE 1 The spigot and socket joint with seal shown in Figure 4 is a general form.
Details of other versions can be found in international and national publications.
NOTE 2
The connection is produced by inserting the spigot end into the socket end that contains a rubber seal. By inserting the spigot end into the socket, the rubber seal is deformed in an axial direction and seals the connection by the resilience present in the rubber seal. NOTE 3 The insertion depth of the spigot into the socket is critical to ensure good sealing.
Joint details can differ from one manufacturer to another and the insertion depth is normally specific to the particular make of joint used. NOTE 4 To absorb axial forces in the connection, special rubber rings can be required.
1 Key 1 Seal Figure 4 — Spigot and socket joints with seal (general form) 4.7 Seals Where joints utilise elastomeric seals (seals) these shall be in accordance with EN 681-1. 4.8 Couplings (slip-on type couplings) 4.8.1 Sleeve couplings A general form of sleeve coupling for use with plain end tube or fittings is given in Figure 5.
As the lengths S and L can vary from one manufacturer to another, the manufacturer shall define these principal dimensions at the time of enquiry and order.
These dimensions shall be measured, using appropriate equipment, and values shall be as states, subject to the manufacturer’s stipulated tolerances. NOTE 1 The sleeve length and tolerance at the end of the tube or fitting is specific to the particular make of coupling used.
NOTE 2 This type of coupling can be used for the connection of different diameters and/or different materials.

Figure 5 — Slip-on type couplings (general form) 4.8.2 Grooved and shoulder couplings A general form of a mechanical coupling for the axial alignment of tubes, or tubes and fittings, is given in Figure 6.
Each groove and coupling shall have a designated allowable operating pressure.
As these types of joint can differ in detail from one manufacturer to another, the manufacturer shall define the principal dimensions at the time of enquiry and order.
These dimensions shall be measured, using appropriate equipment, and values shall be as stated, subject to the manufacturers stipulated tolerances.
Figure 6 — Grooved and shouldered couplings (general form) 5 Classification 5.1 General Joints shall be classified as non-restrained (see 5.2) or restrained (see 5.3) and either rigid (see 5.4) or adjustable, (see 5.5).

1) 1 bar = 100 kN/m2 = 100 kPa.
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