oSIST prEN 10284:2022

SLOVENSKI STANDARD
oSIST prEN 10284:2022
01-junij-2022
Fitingi iz temprane litine s koničnimi priključki za polietilenske (PE) cevovode
Malleable cast iron fittings with compression ends for polyethylene (PE) piping systems
Tempergußfittings mit Klemmanschlüssen für Polyethylen(PE)-Rohrleitungssysteme
Raccords en fonte malléable avec extrémités à compression pour systèmes de
canalisation en polyéthylène (PE)
Ta slovenski standard je istoveten z: prEN 10284
ICS:
23.040.40 Kovinski fitingi Metal fittings
oSIST prEN 10284:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 10284:2022

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oSIST prEN 10284:2022


DRAFT
EUROPEAN STANDARD
prEN 10284
NORME EUROPÉENNE

EUROPÄISCHE NORM

April 2022
ICS 23.040.40 Will supersede EN 10284:2000
English Version

Malleable cast iron fittings with compression ends for
polyethylene (PE) piping systems
Raccords en fonte malléable avec extrémités à Tempergußfittings mit Klemmanschlüssen für
compression pour systèmes de canalisation en Polyethylen(PE)-Rohrleitungssysteme
polyéthylène (PE)
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 459/SC 10.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10284:2022 E
worldwide for CEN national Members.

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oSIST prEN 10284:2022
prEN 10284:2022 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Types of fittings . 9
5 Materials . 9
5.1 General . 9
5.2 Material of the fitting body . 9
5.2.1 Malleable cast iron . 9
5.3 Material of the fitting components . 9
5.4 Elastomers . 9
6 Corrosion protection.10
6.1 General .10
6.2 Hot dip galvanizing .10
6.2.1 General .10
6.2.2 Chemical composition of the hot dip zinc coating .10
6.2.3 Coating mass per surface unit and layer thickness.10
6.2.4 Surface conditions of the hot dip zinc coating .11
6.3 Non-metallic coating .11
6.4 Dangerous substances .11
6.4.1 General .11
6.4.2 Hot dip zinc coating .11
6.4.3 Despatch conditions of finished fittings .11
6.4.4 Non-metallic coating .11
7 Design .11
7.1 General .11
7.2 Geometrical characteristics .11
7.3 Minimum bore .12
7.4 Supporting sleeve .12
7.5 Pipe threads .13
7.6 Surfaces .13
7.7 Transition fittings .13
7.7.1 Transition with jointing thread .13
7.7.2 Transition for steel pipe .13
7.7.3 Transition for other pipes .13
7.8 Load transmission .13
8 Performance requirements .14
8.1 Yield strength .14
8.2 Tightness .14
8.2.1 Internal pressure strength .14
8.2.2 Leak tightness .14
8.3 Pressure and temperature limits .14
8.4 Dimensional tolerances .15
8.5 Reaction to fire .15
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8.6 Durability . 15
8.6.1 Durability of fittings . 15
8.6.2 Durability of elastomeric seals . 15
8.7 Dangerous substances . 15
9 Test requirements . 15
9.1 General . 15
9.2 Component test . 17
9.2.1 Testing of malleable cast iron . 17
9.2.2 Testing of plastic components . 17
9.2.3 Testing of sealing materials . 17
9.2.4 Testing of hot dip zinc coating . 18
9.2.5 Analysis of polycyclic aromatic hydrocarbons . 18
9.2.6 Testing of non-metallic coating . 18
9.2.7 Safety factors . 18
9.2.8 Visual inspection . 19
9.2.9 Geometrical characteristics . 19
9.2.10 Leak tightness of fitting body . 19
9.3 Assembly test . 19
9.3.1 General . 19
9.3.2 Leak tightness under internal pressure . 20
9.3.3 Long-term leak tightness under internal pressure . 20
9.3.4 Resistance to tensile loading at 23°C . 21
9.3.5 Resistance to pull out at 23 °C . 22
9.3.6 Resistance to pull out at 80 °C . 22
9.3.7 Leak tightness after temperature cycling (outside temperature) . 23
9.3.8 Leak tightness under internal pressure when subjected to bending . 24
9.3.9 Behaviour in case of negative pressure (Vacuum) . 24
9.3.10 Surface protection – testing by salt spray test . 24
10 Assessment of conformity . 25
11 Designation of fittings . 25
11.1 Elements of the designation for ordering . 25
11.2 Additional notes on designation of size . 25
11.3 Examples of designation . 25
12 Marking . 26
Annex A (normative) Surface protection - Salt spray test . 27
A.1 Requirements . 27
A.2 Testing . 27
Bibliography . 28

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oSIST prEN 10284:2022
prEN 10284:2022 (E)
European foreword
This document (prEN 10284:2022) has been prepared by Technical Committee CEN/TC 459 “ECISS -
1
European Committee for Iron and Steel Standardization” , the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 10284:2000.

1
Through its sub-committee CEN/TC 459/SC 10 “Steel tubes, and iron and steel fittings” (secretariat: UNI).
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1 Scope
This document specifies the requirements for the design, performance and testing of fittings made of
malleable cast iron (see also Clause 5 Materials) with compression ends for polyethylene piping systems.
This document applies to piping systems in polyethylene (PE) materials for different application fields,
such as water and gas supply, water distribution, irrigation, aqueous liquids, pressurized air and gaseous
fuel systems.
NOTE Products complying with this document used for water applications intended for human consumption
are expected to comply with the relevant national, regional or local regulatory provisions applicable in the place of
use. Due to the variety and dynamic of the requirements, it is advisable to check the compliance.
The malleable cast iron fittings specified in this standard are of compression end type for the connection
of PE pipes or of transition type with combined compression ends for pipes in different materials or with
combined compression and threaded ends in conformance with EN 10226-1. Their range of sizes covers
nominal outside diameters of PE pipes dn 16 mm to dn 110 mm (DN 10 to DN 100) and pipe thread sizes
⅜ to 4.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment
EN 681-1, Elastomeric seals - Materials requirements for pipe joint seals used in water and drainage
applications - Part 1: Vulcanized rubber
EN 682, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and
hydrocarbon fluids
EN 1555-2, Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 2: Pipes
EN 1562, Founding - Malleable cast irons
EN 10204, Metallic products - Types of inspection documents
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
EN 10226-3, Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by
means of limit gauges
EN 10344, Malleable cast iron fittings with compression ends for steel pipes
EN 12201-2, Plastics piping systems for water supply, and for drainage and sewerage under pressure -
Polyethylene (PE) - Part 2: Pipes
EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions,
tolerances and designation (ISO 228-1)
EN ISO 228-2, Pipe threads where pressure-tight joints are not made on the threads - Part 2: Verification by
means of limit gauges (ISO 228-2)
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EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination
of the resistance to internal pressure - Part 1: General method (ISO 1167-1)
EN ISO 1167-4, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination
of the resistance to internal pressure - Part 4: Preparation of assemblies (ISO 1167-4)
EN ISO 1460, Metallic coatings - Hot dip galvanized coatings on ferrous materials - Gravimetric
determination of the mass per unit area (ISO 1460)
EN ISO 2178, Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic
method (ISO 2178)
EN ISO 3458, Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method
for leaktightness under internal pressure (ISO 3458)
EN ISO 3459, Plastic piping systems - Mechanical joints between fittings and pressure pipes - Test method
for leaktightness under negative pressure (ISO 3459)
EN ISO 3501, Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method
for resistance to pull-out under constant longitudinal force (ISO 3501)
EN ISO 3503, Plastics piping systems - Mechanical joints between fittings and pressure pipes - Test method
for leaktightness under internal pressure of assemblies subjected to bending (ISO 3503)
EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-
1)
EN ISO 15875-2, Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE-
X) - Part 2: Pipes (ISO 15875-2)
EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227)
ISO 13951, Plastics piping systems — Test method for the resistance of plastic pipe/pipe or pipe/fitting
assemblies to tensile loading
ISO 19899, Plastics piping systems — Polyolefin pipes and mechanical fitting assemblies — Test method for
the resistance to end load (AREL test)
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
fitting
connecting piece for pipes and other piping accessories, consisting of one or more parts
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3.2
compression fitting
connecting piece for pipes and other piping accessories, equipped with minimum one compression end,
sealing by elastomeric gaskets
3.3
transition fitting
fitting jointing different types of pipe and/or comprising different types of outlet
3.4
end-load resistant joint
joint which can resist axial loads without additional external mechanical support
3.5
non-end-load resistant joint
joint which cannot resist axial loads without additional external mechanical support
3.6
fitting size
size designation of the nominal outside diameter, dn, of the connecting PE pipe or of the size of the jointing
thread
3.7
fitting body
main pressure-bearing part of a fitting
3.8
outlet
end of a fitting for the purpose of connection with a pipe or other piping accessories
3.9
run
two principal axially aligned outlets of a tee
3.10
branch
side outlet of a tee
3.11
compression end
end in which a mechanical joint is formed by the tightening of a nut to compress a ring or sleeve onto the
outside wall of the tube, or clamp a flared portion of the tube to the body of a fitting
Note 1 to entry: The assembled joint should be understood as being demountable.
Note 2 to entry: The purpose of a compression end is to connect pipe and fitting body using a compression
system, consisting of a body and a nut or flange, by using common tools.
3.12
supporting sleeve
insert stiffener
cylindrical device providing a permanent support for the pipe to prevent creep in the pipe wall under
radial compressive forces
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3.13
grip
locking ring
ring that holds the pipes in place and prevents pull out from the joint
3.14
minimum bore
smallest internal diameter of a fitting measured at any cross-section
3.15
smooth wall
smooth pipe surface in the seal and clamping area which is unshaped, undamaged and untreated
Note 1 to entry: Cleaning and deburring is not regarded as treatment.
3.16
dismountability
ability of a fitting to disconnect and re-assemble the joint without destroying the fitting body and the pipe,
except the components of the jointing system, such as the sealing and grip or locking rings
3.17
jointing thread
thread complying with EN 10226-1
3.18
fastening thread
thread complying with EN ISO 228-1
3.19
component test
test to verify the performance of a fitting carried out on the non-assembled fitting or fitting parts
3.20
assembly test
test to verify the fitness for purpose of an assembled fitting connected with the pipe(s)
3.21
resistance to pull-out
ability of the joint to withstand axial forces, applied mechanically or through internal pressure, while
remaining leak-tight
3.22
allowable operating pressure
PFA
maximum operating pressure of the connected pipe joint(s) in continuous function
3.23
allowable operating temperature
TFA
maximum operating temperature of the connected pipe joint(s) in continuous function
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4 Types of fittings
Types and shapes of fittings are to the discretion of the manufacturer and therefore not standardized or
limited regarding measurements.
5 Materials
5.1 General
All materials of fitting body and components shall be resistant against the medium of the respective
application. In case of potable water, national hygienic requirements apply.
5.2 Material of the fitting body
5.2.1 Malleable cast iron
The material used for the fitting body shall be malleable cast iron conforming to EN 1562. The grade of
material used shall be selected from the following grades:
— Grade EN-GJMW-400-5 for fittings in white heart malleable iron.
— Grade EN-GJMB-350-10 for fittings in black heart malleable iron.
Fittings shall be designated by material symbol according to the selected material mentioned above and
as given in Table 1.
Table 1 — Material symbols
Material symbol Material grade
EN-GJMW-400-5 or
A
EN-GJMB-350-10
5.3 Material of the fitting components
Materials of the internal parts of the fittings in contact with PE pipe shall not adversely affect pipe
performance, e.g. by initiation of stress cracking. If a lubricant (detergent, grease, etc.) is used for
assembling it shall have no detrimental effect on the properties of the pipe and shall not cause the
assembly to fail the functional and hygienic requirements.
5.4 Elastomers
The material of elastomeric sealing rings used in fittings shall be chosen for drinking water application
from EN 681-1 and for gas supply from EN 682, and/or EN 549, depending on the specific application and
shall conform to the appropriate class or type.
NOTE For the choice of elastomeric materials, it is advisable to comply with national regulations.
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6 Corrosion protection
6.1 General
In applications where materials are susceptible to corrosion, the components shall be adequately
protected as follows.
NOTE For the choice of corrosion protection, it is advisable to comply with national regulations.
6.2 Hot dip galvanizing
6.2.1 General
Where a protection by zinc coating is required, the zinc coating shall be applied by the hot dip galvanizing
process and shall meet the following requirements.
Additional permanent coatings on top of the hot dip zinc coating do not fall under the category of hot dip
galvanizing in terms of use in the potable water application. The suitability of additional permanent
coatings for potable water applications should be demonstrated by testing.
6.2.2 Chemical composition of the hot dip zinc coating
The content by mass of the accompanying elements in the finished zinc coating shall not exceed the
following maximum values:
— antimony (Sb) 0,01 %
— arsenic (As) 0,02 %
— bismuth (Bi) 0,01 %
— cadmium (Cd) 0,01 %
— lead (Pb) 0,1 %
NOTE The chemical composition is restricted with regard to the limitation of dangerous substances also in
respect to drinking water applications. When fittings are used in potable water applications, relevant national
hygienic regulations apply.
6.2.3 Coating mass per surface unit and layer thickness
2
The surface related mass of the zinc coating shall not be less than 500 g/m , which equals to a layer
thickness of 70 μm. These limits refer to the average of 5 fittings with 10 measurements each, statistically
distributed across the fitting. The layer mass/thickness measured on an individual sample shall not be
2
less than 450 g/m (63 μm).
The medium layer thickness s of the zinc coating in µm shall be calculated by using the approximation
formula:
m
A
s=
72,
where
2
m is the surface related mass of the zinc coating in g/m .
A
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6.2.4 Surface conditions of the hot dip zinc coating
The zinc coating on the internal surface of the fitting shall be continuous with the exception of machined
surfaces. In the special case of larger material cross-sections, the iron-zinc alloy phases may grow
through. The internal zinc coating shall be free from zinc blisters, zinc burrs, non-metallic remainders.
6.3 Non-metallic coating
Depending on external and internal conditions of use, also non-metallic coating may be used, if they are
requested by the purchaser.
NOTE If the non-metallic coating is used in drinking water applications, relevant national regulations apply.
6.4 Dangerous substances
6.4.1 General
For the use of fittings produced in accordance with this document, it is advisable to comply with national
regulations with regard to the release of dangerous substances.
6.4.2 Hot dip zinc coating
The chemical composition of the hot dip zinc coating shall not exceed the limits given in 6.2.2.
6.4.3 Despatch conditions of finished fittings
The surface of the fitting shall be free of polycyclic aromatic hydrocarbons.
6.4.4 Non-m
...