SIST EN 16397-2:2015
(Main)Flexible couplings - Part 2: Characteristics and testing for metal banded flexible couplings, adaptors and bushes
Flexible couplings - Part 2: Characteristics and testing for metal banded flexible couplings, adaptors and bushes
This Standard specifies the materials and dimensions for metal banded flexible couplings, bushes and adaptors for use with pipes and fittings in drainage and sewerage systems, normally operated under gravity, both above and below ground and intended to connect different pipes for:
- Repair of damaged pipelines,
- Connecting pipes of different materials and/or diameters,
- Jointing short/cut lengths of pipe,
- Jointing specific pipe systems,
- Jointing post-inserted preformed junctions.
The coupling consists of a moulded or extruded rubber sleeve with two stainless steel clamping bands with or without a stainless steel shear band. The clamping bands enable the sleeve to form a seal with the pipes to be joined. The shear band gives resistance to shear forces. Connections may be made between pipes which cannot be satisfactorily joined by a coupling alone, of dissimilar sizes or material, by using an appropriate bush or bushes with the coupling.
Flexible Kupplungen - Teil 2: Eigenschaften und Prüfung von flexiblen Kupplungen, Übergangsbauteilen und Ausgleichsringen mit Metallband
Die vorliegende Europäische Norm legt die Werkstoffe und Maße für flexible Kupplungen, Ausgleichsringe und Übergangsbauteile mit Metallband für die Verwendung mit Rohren und Zubehör fest, die üblicherweise als Schwerkraftentwässerungssysteme oberirdisch und erdverlegt betrieben werden und für den Anschluss unterschied¬licher Rohrleitungen für folgende Zwecke vorgesehen sind:
- die Reparatur von beschädigten Rohrleitungen;
- den Anschluss von Rohrleitungen aus unterschiedlichen Werkstoffen und/oder Durchmessern;
- die Verbindung kurzer/geschnittener Rohrleitungslängen;
- die Verbindung spezifischer Rohrsysteme;
- die Verbindung nachträglich eingebauter vorgefertigter Abzweigungen.
Üblicherweise besteht eine Kupplung aus einem Manschetten-Formteil oder einem extrudierten Teil mit zwei Spannbändern aus nichtrostendem Stahl mit oder ohne Scherband aus nichtrostendem Stahl. Durch die Spannbänder bildet die Manschette eine Abdichtung mit den zu verbindenden Rohren. Das Scherband bietet Widerstand gegen Scherkräfte. Anschlüsse können zwischen Rohren hergestellt werden, die nicht zufriedenstellend allein durch eine Kupplung verbunden werden können, mit ungleichen Weiten oder Werkstoffen unter Verwendung eines geeigneten Ausgleichsrings oder Ausgleichsringen mit einer Kupplung.
Raccords flexibles - Partie 2: Caractéristiques et essais des raccords flexibles équipés de bandes métalliques, des raccords d’adaptation et des bagues
La présente Norme européenne spécifie le matériau et les dimensions des raccords flexibles équipés de bandes métalliques, des bagues et des raccords d’adaptation utilisés pour les tuyaux et installations des réseaux d’évacuation et d’assainissement, normalement de type gravitaire, en surface ou souterrains, destinés à relier différents tuyaux pour :
- la réparation des canalisations endommagées ;
- le raccordement des tuyaux en matériaux différents et/ou de diamètres différents ;
- l’assemblage des tronçons de tuyaux ;
- l’assemblage des systèmes de canalisation spécifiques ;
- l’assemblage des pièces de jonction préfabriquées post-insérées.
Le raccord est composé d’un manchon en caoutchouc moulé ou extrudé ayant deux colliers de serrage en acier inoxydable avec ou sans bande de cisaillement en acier inoxydable. Les colliers de serrage du manchon permettent d’assembler les tuyaux de façon étanche. La bande de cisaillement confère une résistance aux efforts de cisaillement. L’utilisation d’une ou plusieurs bagues appropriées avec le raccord permet de raccorder des tuyaux de tailles différentes ou constitués de matériaux différents, qui ne peuvent pas être assemblés de manière satisfaisante avec un seul raccord.
Prožne spojke - 2. del: Lastnosti in preskušanje prožnih spojk s kovinskim trakom, adaptorjev in puš
Ta standard določa materiale in mere za prožne spojke s kovinskim trakom, puše in adapterje za uporabo s cevmi in spojniki v drenažnih in kanalizacijskih sistemih, ki običajno delujejo s pomočjo gravitacije nad in pod zemljo ter so namenjeni priključitvi različnih cevi za:
– popravilo poškodovanih cevovodov;
– priključitev cevi iz različnih materialov in/ali premerov;
– spajanje kratkih kosov/rezanih dolžin cevi;
– spajanje določenih cevnih sistemov;
– spajanje predoblikovanih spojev, ki so vstavljeni naknadno.
Spojka je sestavljena iz ulite ali ekstrudirane gumijaste obojke, ki vključuje dva vpenjalna trakova iz nerjavnega jekla s strižnim trakom iz nerjavnega jekla ali brez njega. Vpenjalna trakova omogočata zatesnitev obojke s cevema, ki ju je treba združiti. Strižni trak zagotavlja odpornost na strižne sile. Z uporabo ustrezne puše oziroma puš skupaj s spojko se lahko povežejo cevi različnih velikosti ali iz različnih materialov, ki jih ni mogoče zadostno povezati le s spojko.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prožne spojke - 2. del: Lastnosti in preskušanje prožnih spojk s kovinskim trakom, adaptorjev in pušFlexible Kupplungen - Teil 2: Eigenschaften und Prüfung von flexiblen Kupplungen, Übergangsbauteilen und Ausgleichsringen mit MetallbandRaccords flexibles - Partie 2: Caractéristiques et essais des raccords flexibles équipés de bandes métalliques, des raccords d’adaptation et des baguesFlexible couplings - Part 2: Characteristics and testing for metal banded flexible couplings, adaptors and bushes23.040.60Prirobnice, oglavki in spojni elementiFlanges, couplings and jointsICS:Ta slovenski standard je istoveten z:EN 16397-2:2014SIST EN 16397-2:2015en,fr,de01-februar-2015SIST EN 16397-2:2015SLOVENSKI
STANDARD
SIST EN 16397-2:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16397-2
November 2014 ICS 23.040.60 English Version
Flexible couplings - Part 2: Characteristics and testing for metal banded flexible couplings, adaptors and bushes
Raccords flexibles - Partie 2: Caractéristiques et essais des raccords flexibles équipés de bandes métalliques, des raccords d'adaptation et des bagues
Flexible Kupplungen - Teil 2: Eigenschaften und Prüfung von flexiblen Kupplungen, Übergangsbauteilen und Ausgleichsringen mit Metallband This European Standard was approved by CEN on 30 August 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16397-2:2014 ESIST EN 16397-2:2015
EN 16397-2:2014 (E) 2 Contents Page Foreword .3 1 Scope .4 2 Normative references .4 3 Terms and definitions .4 4 Characteristics .8 4.1 General .8 4.2 Materials .8 4.2.1 Stainless steel .8 4.2.2 Rubber .8 4.3 Product characteristics .9 4.3.1 Dimensional tolerances .9 4.3.2 Tightness of joint assemblies . 10 4.3.3 Strength of clamping and shear bands . 10 4.3.4 Reaction to fire . 11 4.3.5 Durability . 11 4.3.6 Dangerous substances . 11 5 Test methods . 11 5.1 Clamping band assembly torque tests . 11 5.1.1 Apparatus . 11 5.1.2 Procedure . 11 5.2 Clamping and shear band fixing strength test . 11 5.2.1 Apparatus . 11 5.2.2 Procedure . 11 6 Assessment and verification of constancy of performance - AVCP . 12 6.1 General . 12 6.2 Type testing . 12 6.2.1 General . 12 6.2.2 Test samples, testing and compliance criteria . 14 6.2.3 Test reports . 15 6.3 Factory production control (FPC) . 15 6.3.1 General . 15 6.3.2 Requirements . 15 6.3.3 Product specific requirements . 18 6.3.4 Procedure for modifications . 19 7 Marking, labelling and packaging . 19 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Construction Products Regulations . 21 Bibliography . 31
SIST EN 16397-2:2015
EN 16397-2:2014 (E) 3 Foreword This document (EN 16397-2:2014) has been prepared by Technical Committee CEN/TC 165 “Wastewater engineering”, the secretariat of which is held by DIN. 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 May 2015 and conflicting national standards shall be withdrawn at the latest by August 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. EN 16397, Flexible couplings, contains the following parts: — Part 1: Performance requirements; — Part 2: Characteristics and testing for metal banded flexible couplings, adaptors and bushes. This standard takes into account the requirements of EN 476. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16397-2:2015
EN 16397-2:2014 (E) 4 1 Scope This European Standard specifies the materials and dimensions for metal banded flexible couplings and adaptors and bushes for use with pipes and fittings in drain and sewer systems, usually operated under gravity and periodic hydraulic surcharge, both above and below ground inside or outside buildings and intended to connect pipes for: — repair of damaged pipelines; — connecting pipes of different materials and/or diameters; — jointing short/cut lengths of pipe; — jointing specific pipe systems; — jointing post-inserted preformed junctions. The coupling consists of a moulded or extruded rubber sleeve with two stainless steel clamping bands with or without a stainless steel shear band. The clamping bands enable the sleeve to form a seal with the pipes to be joined. The shear band gives resistance to shear forces. Connections may be made between pipes which cannot be satisfactorily joined by a coupling alone, of dissimilar sizes or material, by using an appropriate bush or bushes with the coupling or by using an appropriate adaptor. 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 681-1, Elastomeric seals - Materials requirements for pipe joint seals used in water and drainage applications - Part 1: Vulcanized rubber EN 10088-1:2014, Stainless steels — Part 1: List of stainless steels EN 10088-2, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10151:2002, Stainless steel strip for springs - Technical delivery conditions EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests EN 16397-1:2014, Flexible couplings — Part 1: Performance requirements EN ISO 7500-1, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification and calibration of the force-measuring system (ISO 7500-1) EN ISO 9445-1:2010, Continuously cold-rolled stainless steel - Tolerances on dimensions and form - Part 1: Narrow strip and cut lengths (ISO 9445-1:2009) ISO 3302-1:2014, Rubber — Tolerances for products — Part 1: Dimensional tolerances 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. SIST EN 16397-2:2015
EN 16397-2:2014 (E) 5 3.1 metal banded flexible coupling moulded or extruded and joined rubber sleeve, with or without bushes or shear band, with adjustable stainless steel clamping bands by which it is secured to the pipe ends 3.1.1 Type 1 coupling (without shear band) moulded or extruded and joined rubber sleeves with adjustable stainless steel clamping bands by which it is secured to the pipe ends without shear band Note 1 to entry: An example of a typical Type 1 coupling is shown in Figure 1.
Key 1 pipe 1 2 clamping band with drive unit 3 sleeve 4 pipe 2 b width of sleeve d3 outside diameter NOTE More than one drive unit could be used where required. Figure 1 — Example of Type 1 coupling (without shear band) 3.1.2 Type 2 coupling (with shear band) moulded or extruded and joined rubber sleeve with adjustable stainless steel clamping bands by which it is secured to the pipe ends and a shear band to give resistance to shear loads Note 1 to entry: An example of a typical Type 2 coupling is shown in Figure 2 and Figure 3.
SIST EN 16397-2:2015
EN 16397-2:2014 (E) 6
Key 1 pipe 1 2 pipe 2 3 drive unit 4 adjustor unit 5 shear band 6 sleeve 7 clamping band b width of sleeve d3 outside diameter NOTE More than one drive unit could be used where required. Figure 2 — Example of Type 2 coupling (with shear band)
Key 1 shear band adjustors Figure 3 — Example of elevation showing shear band adjustors SIST EN 16397-2:2015
EN 16397-2:2014 (E) 7 3.2 metal banded adaptor moulded stepped rubber sleeve with adjustable stainless steel clamping bands by which it is secured to pipes of different outside diameters Note 1 to entry: Adaptors may incorporate an abrupt change of section. An example of a metal banded adaptor is shown in Figure 4.
Key 1 pipe 1 2 pipe 2 3 moulded rubber 4 drive unit 5 clamping band b width of sleeve d3 outside diameter NOTE More than one drive unit could be used where required. Figure 4 — Example of metal banded adaptor 3.3 bush moulded or extruded and joined rubber section only used with couplings having shear bands to compensate for variations between the outside diameters of pipes which cannot be satisfactorily joined by a coupling alone 3.4 nominal size of a flexible coupling and an adaptor maximum outside diameter of the pipes with which a flexible coupling or adaptor can be used SIST EN 16397-2:2015
EN 16397-2:2014 (E) 8 3.5 shear band component for bearing of shear loads after installation 3.6 clamping band means of clamping the flexible coupling to a pipe using a specified force 3.7 adjustor strip shear band fixing means of clamping the shear band to the flexible coupling using a specified force 4 Characteristics 4.1 General Metal banded flexible couplings and adaptors and bushes shall be free from such defects as would impair their function when in service. Coupling, adapter and bush size is defined by the range of pipe outside diameter (OD) with which it will meet the performance requirements of this European Standard. 4.2 Materials 4.2.1 Stainless steel Stainless steels used for clamping bands, shear band clamps and adjustor units shall be either 1.4307, 1.4301, 1.4404, 1.4401, 1.4571, 1.4303 or 1.4567 listed in EN 10088-1:2014, Table 4 or have equivalent or greater corrosion resistance. The components formed from strip material shall be manufactured from tempered rolled steel to the above specification with a tensile strength level of +C850 according to EN 10088-2 or hardness HV (300 ± 25) according to EN 10151:2002. All stainless steel parts shall be edge dressed and free from sharp edges to prevent injury to the installer and damage to the rubber sleeve. The worm drive units used for shear bands shall be of the same design and specification as those for the clamping bands. 4.2.2 Rubber 4.2.2.1 General Rubber used in coupling and adaptor bodies and bushes shall comply with EN 681-1. 4.2.2.2 Joining rubber sections Where it is necessary to join rubber sections this shall be using the vulcanisation process. SIST EN 16397-2:2015
EN 16397-2:2014 (E) 9 4.3 Product characteristics 4.3.1 Dimensional tolerances 4.3.1.1 General Only minimum dimensions are specified in Table 1 and Table 2. Manufacturers can use dimensions greater than these to suit the specific application. 4.3.1.2 Rubber components The tolerances on the manufactured dimensions of moulded and fabricated rubber components shall comply with ISO 3302-1:2014, Class M3. 4.3.1.3 Extruded rubber The tolerances on the manufactured dimensions of extruded rubber strip shall comply with ISO 3302-1:2014, Class E3. 4.3.1.4 Adaptors and Type 1 couplings Dimensions of rubber and metal components shall be in accordance with the manufacturers declared specifications. 4.3.1.5 Type 2 couplings Minimum dimensions of the rubber and metal components shall comply with Table 1 for Type 2A couplings or Table 2 for Type 2B couplings. Tolerances on stainless steel thicknesses shall comply with EN ISO 9445-1:2010, Table 1, normal grade. Type 2A couplings can be used where the jointed pipes are of the same outside diameter to tight tolerances. In addition the pipe ends shall be square, for example to the tolerance specified in EN 295-1:2013, 5.4, and with a maximum separation of 10 mm. For larger separations and tolerances on squareness of ends and other applications, Type 2B couplings are required. Table 1 — Minimum dimensions of Type 2A couplings Dimensions in millimetres Nominal coupling sizea Width of sleeve Thickness under clamping band Width of shear band Thickness of shear band Width of clamping band Thickness of clamping band Up to 400 102 3,0 32 0,4 12 0,6 401–1000 160 3,5 32 0,5 12 0,6 a maximum outside diameter of the pipe which can be used with a metal banded flexible coupling or adaptor.
SIST EN 16397-2:2015
EN 16397-2:2014 (E) 10 Table 2 — Minimum dimensions of Type 2B couplings Dimensions in millimetres Nominal coupling sizea Width of sleeve Thickness under clamping band Width of shear band Thickness of shear band Width of clamping band Thickness of clamping band Up to 200 120 7,0 54 0,35 12 0,6 201–300 150 7,5 78 0,35 12 0,6 > 301 185 9,0 97 0,75 12 0,6 a maximum outside diameter of the pipe which can be used with a metal banded flexible coupling or adaptor. The minimum thickness of rubber under the shear band shall be 4 mm. 4.3.2 Tightness of joint assemblies Metal banded flexible couplings and adaptors and bushes shall be tested and declared in accordance with EN 16397-1:2014, 5.4. 4.3.3 Strength of clamping and shear bands 4.3.3.1 Testing of clamping band assemblies 4.3.3.1.1 General Metal banded flexible couplings and adaptors and bushes shall be tested and declared in accordance with 4.3.3. Unless features are in place to prevent accidental over tightening, the clamping band assembly for nominal coupling sizes of < 600 mm shall stand the minimum torque of 17 Nm when tested in accordance with the test method in 5.1 where a lever device such as a ratchet spanner is required or recommended for tightening. For nominal coupling sizes of 600 mm to 1 000 mm the minimum torque shall be 17 Nm or 1,25 times the manufacturer's recommended torque, whichever is the greater. Where a lever device is not required or recommended for tightening for couplings of less than 300 mm nominal size, the clamping band assembly shall stand a minimum torque of 10 Nm when tested in accordance with the test method in 5.1. 4.3.3.1.2 Visual testing When subjected to the test specified in 5.1, clamping band and shear band assemblies including adjustors and their means of fixing shall not exhibit any obvious signs of physical distress or degradation. 4.3.3.2 Testing of means of fixing clamping and shear band adjustor strips 4.3.3.2.1 General The means of fixing adjustor strips to clamping or shear bands shall be stronger than the parent material as demonstrated by the failure of the parent material rather than the means of fixing when tested in accordance with 5.2. The assembly shall withstand a minimum force of 6 000 N. 4.3.3.2.2 Visual testing When subjected to the test specified in 5.2, the test piece shall remain joined. SIST EN 16397-2:2015
EN 16397-2:2014 (E) 11 4.3.4 Reaction to fire Metal banded flexible couplings and adaptors and bushes shall be tested and declared in accordance with EN 16397-1:2014, 5.6. 4.3.5 Durability Metal banded flexible couplings and adaptors and bushes shall be tested and declared in accordance with EN 16397-1:2014, 5.7. 4.3.6 Dangerous substances Metal banded flexible couplings and adaptors and bushes shall be tested and declared in accordance with EN 16397-1:2014, 5.8. 5 Test methods 5.1 Clamping band assembly torque tests 5.1.1 Apparatus The apparatus consists of a cylindrical former of the appropriate outside diameter which will not distort under the applied load from the bands. A torque wrench that complies with the accuracy requirement for testing machines given in EN ISO 7500-1 capable of applying a torque of at least 17 Nm or, where applicable, 1,25 times the manufacturer's recommended torque if greater than 17 Nm. Where a lever device is not recommended for tightening the recommended application tool shall be attached to a torque wrench which shall comply with the accuracy requirement for testing machines given in EN ISO 7500-1 and shall be capable of applying a torque of at least 10 Nm. 5.1.2 Procedure The clamping band assembly shall be placed on the former. The adjustor units shall be tightened with the aid of the recommended application tool until the appropriate torque specified in 4.3.3.1 is achieved. The clamping band shall be left for a minimum of 30 min and then loosened. The above procedure shall be repeated and the clamping band assemblies visually inspected for damage or distortion. 5.2 Clamping and shear band fixing strength test 5.2.1 Apparatus Tensile testing machine that complies with the accuracy requirement for grade 1,0 testing machines given in EN ISO 7500-1. 5.2.2 Procedure The sample shall be prepared by welding, clinching or other method a nominal 100 mm length of unperforated adjustor band strip to a section of clamping or shear band strip nominally 100 mm long with a minimum overlap at the fixing of 30 mm as shown in Figure 4. SIST EN 16397-2:2015
EN 16397-2:2014 (E) 12 The fixing equipment, the fixing conditions and the pattern of fixing shall be identical to that used in normal production of shear band components. Extend the sample at a cross-head separation rate of 3 mm/min until fixing failure, and record the maximum tensile force. Dimensions in millimetres
Key 1 clamping band or shear strip 2 example of fixing 3 adjustor band strip 4 overlap (minimum 30 mm) Figure 5 — Arrangement for fixing test 6 Assessment and verification of constancy of performance - AVCP 6.1 General The compliance of metal banded flexible couplings with the requirements of this standard and with the performances declared by the manufacturer in the DoP shall be demonstrated by: — determination of the product-type on the basis of type testing; — factory production control by the manufacturer, including product assessment. The manufacturer shall always retain the overall control and shall have the necessary means to take responsibility for the conformity of the product with its declared performance(s). 6.2 Type testing 6.2.1 General All performances related to characteristics included in this standard shall be determined when the manufacturer intends to declare the respective performances unless the standard gives provisions for declaring them without performing tests (e.g. use of previously existing data, CWFT and conventionally accepted performance). SIST EN 16397-2:2015
EN 16397-2:2014 (E) 13 Assessment previously performed in accordance with the provisions of this standard, may be taken into account provided that they were made to the same or a more rigorous test method, under the same AVCP system on the same product or products of similar design, construction and functionality, such that the results are applicable to the product in question. NOTE 1 Same AVCP system means testing by an independent third party under the responsibility of a notified product certification body. For the purposes of assessment, the manufacturer's products may be grouped into families, where it is considered that the results for one or more characteristics from any one product within the family are representative for that same characteristics for all products within that same family. NOTE 2 Products may be grouped in different families for different characteristics. Products for testing shall be chosen to be representative of the size ranges in Table 3. For factory production control the chosen sizes shall be successively rotated through each range. Table 3 — Nominal coupling size group Nominal coupling size Up to 200 201 to 300 301 to 600 > 600 For all tests on couplings which form joint assemblies, EN 16397-1:2014, 5.4.3, 5.4.4 and 5.4.5, the test modes set out in Table 4 shall be applied. Table 4 — Matrix of test modes Test mode Restrained pipe Unrestrained pipe Test combination A Rigid Rigid Pressure and shear Pressure and deflection B Rigid Flexible Pressure and diameter deformation Pressure and deflection Vacuum and diameter deformation Vacuum and deflection C Flexible Flexible Pressure and diameter deformation Pressure and deflection Vacuum and diameter deformation Vacuum and deflection Reference to the assessment method standards should be made to allow the selection of a suitable representative sample. In addition, the determination of the product-type shall be performed for all characteristics included in the standard for which the manufacturer declares the performance: SIST EN 16397-2:2015
EN 16397-2:2014 (E) 14 — at the beginning of the production of a new or modified metal banded flexible couplings (unless a member of the same product range); or — at the beginning of a new or modified method of production (where this may affect the stated properties); or — they shall be repeated for the appropriate characteristic(s), whenever a change occurs in the metal banded flexible couplings design, in the raw material or in the supplier of the components, or in the method of production (subject to the definition of a family), which would affect significantly one or more of the characteristics. Where components are used whose characteristics have already been determined, by the component manufacturer, on the basis of assessment methods of other product standards, these characteristics need not be re-assessed. The specifications of these components shall be documented. Products bearing regulatory marking in accordance with appropriate harmonized European specifications may be presumed to have the performances declared in the DoP, although this does not replace the responsibility on the metal banded flexible coupling manufacturer to ensure that the metal banded flexible coupling as a whole is correctly manufactured and its component products have the declared performance values. 6.2.2 Test samples, testing and compliance criteria The number of samples of metal banded flexible couplings to be tested/assessed shall be in accordance with Table 5. Table 5 — Number of samples to be tested and compliance criteria metal banded flexible couplings Characteristic Requirement according to Test method according to Number of units Compliance criteria
according to Materials 4.2 Visual inspection 3 samples of each nominal size group “Pass” 4.2 Manufacture 4.1 and EN 16397-1:2014, 5.1 Visual inspection 3 samples of each nominal size group “Pass” 4.1 and EN 16397-1:2014, 5.1 Dimensional tolerances 4.3.1 Measurement against dimensions 3 samples of each nominal size group 4.3.1 within tolerance Tightness: Water and vacuum EN 16397-1:2014, 5.4 EN 16397-1:2014, 6.1 1 sample of each nominal size group and test mode in Table 3 EN 16397-1:2014, 5.4 tightness Strength of bands 4.3.3 5.1 and 5.2 3 samples of each nominal size group 4.3.3 strength Durability of tightness EN 16397-1:2014, 5.7.2 EN 16397-1:2014, 6.1 1 sample of each nominal size group EN 16397-1:2014, 5.7.2 tightness Reaction to fire EN 16397-1:2014, 5.6 EN 16397-1:2014, 5.6 1 sample of each material used EN 13501–1 classification SIST EN 16397-2:2015
EN 16397-2:2014 (E) 15 6.2.3 Test reports The results of the determination of the product-type shall be documented in test reports. All test reports shall be retained by the manufacturer for at least 10 years after the last date of production of the metal banded flexible couplings to which they relate. 6.3 Factory production control (FPC) 6.3.1 General The manufacturer shall establish, document and maintain an FPC system to ensure that the products placed on the market comply with the declared performance of the essential characteristics. The FPC system shall consist of procedures, regular inspections and tests and/or assessments and the use of the results to control raw and other incoming materials or components, equipment, the production process and the product. All the elements,
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