ДСТУ Б EN 295-4:2012
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EN 295-4:1994 - -
^AЦ?IO^AЁ?Ь?^И?Й? VITRIFIED CLAY PIPES AND FITTINGS AND PIPE JOINTS FOR DRAINS AND SEWERS -
Part 10: Requirements for special fittings, adapters and compatible accessories
1 1 Scope
This Standard specifies the requirements for special fittings, adaptors and compatible accessories made from vitrified clay and/or other suitable materials for use with vitrified clay pipes and fittings in drainage and sewerage systems. It does not apply to items which are specified in other parts of EN 295. Any additional requirements for particular items are given in the annexes to this part of the standard.
Where this Standard provides for different systems of jointing dimensions, different lengths and different types of fittings, the specifiers/purchas- ers may select according to their requirements.
NOTE 1 - The wide diversity of ranges and numbers of special fittings, adaptors and compatible accessories offered by manufacturers and required by specifiers and purchasers throughout Europe cannot be fully listed within this standard. Manufacturers’ product range lists and specifications provide the necessary information.
NOTE 2 - Where reference is made to clauses in EN 295-1:1991, EN 295-2: 1991 or EN 295-3:1991 this is clearly stated.
2 ^ EN 295-1:1991 EN 295-2:1991 EN 295-3:1991 ISO/DIS 4633:1986 EN 10002-2:1992 3 3.1 ^ 3.2 2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. 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. Further details are given in normative annexes EN295-1:1991Vitrified clay pipes and fittings and pipe joints for drains and sewers: Part 1: Requirements.
EN 295-2:1991Vitrified clay pipes and fittings and pipe joints for drains and sewers: Part 2: Quality control and sampling.
EN 295-3:1991Vitrified clay pipes and fittings and pipe joints for drains and sewers: Part 3: Test methods.
ISO/DIS 4633: ISO/DIS 4633:1986 Rubber seals - Joint rings for water supply, drainage and sewerage pipelines - Specification for materials.
EN 10002-2 :1 EN 10002-2:1992 ensile testing of metallic materials - Part 2: verification of the force measuring system of the tensile testing machine.
3 Definitions
3.1 Special fittings
Any fittings made from vitrified clay and/or other suitable materials which are not covered by the fitting groups used in table 2 of EN 295-2:1991.
3.2 Adaptors
Special items, made from vitrified clay and/or other suitable materials, to join together vitrified clay pipes and fittings of different jointing systems permitted in EN 295-1 or to join them to items of other pipeline materials.
3.3 4 4.1 4.1.1 4.1.2 4.1.3 4.1.4 ^0 4.1.5 4.2 3.3 Compatible accessories
Accessories made from vitrified clay and/or other suitable materials designed to be incorporated into a system which includes pipes and/or fittings specified to any part of EN 295.
4 Requirements
4.1 Materials and manufacture
4.1.1 Vitrified clay
All vitrified clay elements of special fittings, adaptors and compatible accessories shall comply with 2.1 ofEN 295-1:1991.
4.1.2 Vulcanised rubber sealing materials
Vulcanised rubber sealing materials shall comply with ISO/DIS 4633:1986. Where vulcanised rubber sealing elements are permanently attached to vitrified clay components of adaptors, special fittings or compatible accessories they shall fulfill the additional requirement of 3.1.1 of EN 295-1:1991 when tested in accordance with clause 14 ofEN 295-3:1991.
4.1.3 Polyurethane sealing materials
Polyurethane sealing materials shall comply with the requirements of table 7 of EN 295-1:1991, when tested in accordance with clause 15 of EN 295-3:1991.
4.1.4 Other materials
All other materials used in special fittings, adaptors or compatible accessories shall comply with the material requirements of any relevant annex. Otherwise they shall comply with the pipe and fittings manufacturer’s declared specification, which shall include requirements for long term behavior.
4.1.5 Manufacture
Special fittings, adaptors and compatible accessories shall be free from such defects as would impair their function when in service.
4.2 Minimum bore
The minimum permissible bore of pipeline connections to pipes and fittings specified in EN 295-1:1991 shall be as specified in 2.2 of EN 295-1:1991.
4.3 4.4 4.5 4.6 4.7 C 4.8 4.9 X 4.9.1 E 4.3 Length
The nominal length of straight special fittings shall be specified by the manufacturer. The limits of tolerance on this length shall be -1 % and +4 % measured to the nearest whole mm, with a minimum of +10 mm.
4.4 Angles
Special fittings which include branches shall have preferred nominal angles of 45 4.5 Joint interchangeability
The dimensions of the jointing systems used to connect special fittings, adaptors or compatible accessories to vitrified clay pipelines shall conform to the requirements of 3.6 of EN295-l:1991.
4.6 Bond strength of adhesive for fixing fired vitrified clay parts together
When tested in accordance with clauses 7 and 20 of EN 295-3 :1991, the bond strength of the adhesive shall be as specified in 2.12 of EN 295-1:1991.
4.7 Water seal of special fittings
Trapped special fittings for drainage outside buildings and for sewerage shall provide a minimum water seal depth of 50 mm.
4.8 Impermeability of special fittings
Where applicable, when tested in accordance with clause 13 of EN 295-3:1991 either using an air or water test, the impermeability of special fittings shall be as specified in 2.18 of EN 295-1:1991.
4.9 Chemical Resistance
4.9.1 Vitrified clay
Elements of special fittings adaptors and compatible accessories specified in this standard made from vitrified clay are resistant to chemical attack. For special circumstances of application the chemical resistance of vitrified clay elements may be determined by the use of the test in clause 10 ofEN 295-3:1991.
4.9.2 ^0 4.10 4.10.1 4.10.2 4.10.2.1 4.10.2.2 5 4.9.2 Other Materials
The chemical resistance of elements made from other materials shall comply with the relevant specifications.
4.10 Joint assemblies
4.10.1 Vitrified clay pipeline systems
When tested in accordance with clauses 18, 20 and 21 of EN 295-3:1991, joint assemblies formed using the jointing systems permitted in 3.6 of EN 295-1:1991 shall where applicable satisfy the requirements of 3.2.1, 3.3, 3.4, 3.7.1, 3.8 and 3.9 of EN 295-1:1991 for water tightness, deflection, shear resistance and chemical and physical resistance to effluent and thermal stability.
4.10.2 Vitrified clay to pipelines of other materials
4.10.2.1 When tested in accordance with clauses 18, 20 and 21 of EN 295-3 :1991 joint assemblies connecting vitrified clay pipelines to pipelines of other materials which do not undergo significant diametral deflection under shear test load (e.g. concrete, cast iron, ductileiron, steel and fibre-cement) shall satisfy the requirements of 3.2.1, 3.3, 3.4, 3.7.1, 3.8 and 3.9 of EN 295-1:1991 for water tightness, deflection, shear resistance, chemical and physical resistance to effluent and thermal stability.
4.10.2.2 When tested in accordance with clauses 18 and 20 of EN 295-3:1991 joint assemblies connecting vitrified clay pipelines to pipelines of materials which undergo significant diametral deflection under shear test load (e.g. PVC-U, PE, PP and GRP) shall also satisfy the requirements of 3.2.1, 33, 3.4, and 3.7.1 of EN295-1:1991, with the exception that, for 3.4, when the shear load is applied to the flexible pipe, the applied load shall be that required to produce a diametral deflection of (3 + 0,5) % on the external diameter.
5 Sampling for Tests
Sampling for special fittings, adaptors and compatible accessories shall be in accordance with Table 1, where applicable. Sampling is specified in EN 295-2:1991, in which the specification clause numbers refer to EN 295-1:1991. Table 1 gives the cross-reference between the relevant EN 295-1:1991 Table 1 -Sampling
Vitrified clay 4.1.1 2.1 3.1 Minimum bore 4.2 2.2 3.5 Water seal 4.7 2.6 3.6 ^ Chemical resistance 4.9 2.15 3.7 Watertightness 4.10 3.2 3.13 Deflection 4.10 3.3 3.13 Shear resistance 4.10 3.4 3.13 X Thermal cycling stability 4.10 3.8 3.13.3 ^ac 7 7.1 - EN 295-4;
- - - - - - - ^0 - - 7.2 8 6 Designation
The following shall be used for the designation of special fittings, adaptors and compatible accessories.
Block 1 Description
Block 2 EN 295-4
Block 3 Individual item block
Block 3.1 Nominal size(s) applicable
Block 3.2 Jointing system, where appropriate.
7 Marking
7.1 All special fittings, adaptors, couplings and compatible accessories shall be marked with:
- EN 295
- CE marking (To be added after the relevant requirements have been met)
- identification symbol of the third party certification body
- manufacturer’s identification
- date of manufacturing
- nominal size (DN ...) or OD size range
- dimensional jointing system of EN 295 if appropriate
- other applicable pipeline system if appropriate
- type of coupling if appropriate (annex A)
- recommended assembly torque and assembly tool if appropiate (annex A)
This marking shall preferably be impressed before firing vitrified clay elements, or, if this is not possible, shall be indelibly done after firing. Marking on components made from other materials shall also be impressed or indelible.
7.2 Products shall be marked with the number of this standard only if certified in accordance with clause 8 by a third party certification body.
8 Quality control
Quality control shall be in accordance with EN 295-2:1991.
A.1.1 A.1.1.1 A.1.1.4 Annex A(normative)