SIST EN 10284:2026

SLOVENSKI STANDARD
01-februar-2026
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: EN 10284:2025
ICS:
23.040.40 Kovinski fitingi Metal fittings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 10284
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2025
EUROPÄISCHE NORM
ICS 23.040.40 Supersedes 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 European Standard was approved by CEN on 17 November 2025.

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, 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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10284:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Types of fittings .10
5 Materials .10
5.1 General .10
5.2 Material of the fitting body .10
5.3 Material of the fitting components .10
5.4 Elastomers .10
6 Corrosion protection.11
6.1 General .11
6.2 Hot dip galvanizing .11
6.2.1 General .11
6.2.2 Chemical composition of the hot dip zinc coating .11
6.2.3 Coating mass per surface unit and layer thickness.11
6.2.4 Surface conditions of the hot dip zinc coating .12
6.3 Non-metallic coating .12
6.4 Dangerous substances .12
6.4.1 General .12
6.4.2 Hot dip zinc coating .12
6.4.3 Dispatch conditions of finished fittings .12
6.4.4 Non-metallic coating .12
7 Design .12
7.1 General .12
7.2 Geometrical characteristics .12
7.3 Minimum bore .13
7.4 Supporting sleeve .13
7.5 Pipe threads .14
7.6 Surfaces .14
7.7 Transition fittings .14
7.7.1 Transition with jointing thread .14
7.7.2 Transition for steel pipe .14
7.7.3 Transition for other pipes .14
7.8 Load transmission .14
8 Performance requirements .15
8.1 Yield strength .15
8.2 Tightness .15
8.2.1 Internal pressure strength .15
8.2.2 Leak tightness .15
8.3 Pressure and temperature limits .15
8.4 Dimensional tolerances .16
8.5 Reaction to fire .16
8.6 Durability .16
8.6.1 Durability of fittings . 16
8.6.2 Durability of elastomeric seals . 16
8.7 Dangerous substances . 16
9 Test requirements . 16
9.1 General . 16
9.2 Component test . 19
9.2.1 Testing of malleable cast iron . 19
9.2.2 Testing of plastic components . 19
9.2.3 Testing of sealing materials . 19
9.2.4 Testing of hot dip zinc coating . 19
9.2.5 Analysis of polycyclic aromatic hydrocarbons . 19
9.2.6 Testing of non-metallic coating . 19
9.2.7 Visual inspection . 19
9.2.8 Geometrical characteristics . 19
9.2.9 Leak tightness of fitting body . 20
9.3 Assembly test . 20
9.3.1 General . 20
9.3.2 Leak tightness under internal pressure . 20
9.3.3 Long-term leak tightness under internal pressure . 21
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 end load 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) . 25
9.3.10 Surface protection – testing by salt spray test . 25
10 Manufacture . 25
11 Designation of fittings . 25
11.1 Elements of the designation for ordering . 25
11.2 Additional notes on designation of size . 26
11.3 Examples of designation . 26
12 Marking . 26
Annex A (normative) Surface protection – Salt spray test . 27
A.1 Requirements . 27
A.2 Testing . 27
Bibliography . 28
European foreword
This document (EN 10284:2025) has been prepared by Technical Committee CEN/TC 459 “ECISS -
European Committee for Iron and Steel Standardization” , the Secretariat of which is held by AFNOR.
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 June 2026 and conflicting national standards shall be
withdrawn at the latest by June 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 10284:2000.
This document includes the following significant technical changes with respect to EN 10284:2000:
— aqueous liquids and pressurized air have been added for possible applications;
— the range of pipe sizes covered and pipe thread sizes have been changed;
— clauses for dangerous substances have been added;
— notes have been added for awareness of possible national regulations for potable water application;
— Clause 2 “Normative references” has been updated;
— Clause 3 “Terms and definitions” has been revised;
— Clause 5 “Materials” has been updated; specifically, material symbol B has been removed;
— requirements for hot dip galvanizing have been revised;
— Clause 7 “Design” has been revised;
— Clause 8 “Performance requirements” has been revised and extended;
— Clause 9 “Test requirements” has been completely revised;
— Clause 11 “Designation of fittings” has been revised; specifically, examples of designation;
— Annex A “Examples of design” has been removed;
— Annex B “Quality assurance system” has been removed and replaced by references to EN ISO 9001;
— new annex has been added for “surface protection – salt spray test”.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.

Through its sub-committee CEN/TC 459/SC 10 “Steel tubes, and iron and steel fittings” (secretariat: UNI).
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, 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, Türkiye and the United
Kingdom.
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 supply and distribution of gas, water for general purposes (irrigation, etc.) as well as for human
consumption, aqueous liquids and pressurized air.
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 document 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 d 16 mm to d 110 mm (DN 10 to DN 100) and pipe thread sizes
n n
3/8 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 drains and sewers 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)
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 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227)
EN ISO 15875-2, Plastics piping systems for hot and cold water installations — Crosslinked polyethylene
(PE-X) — Part 2: Pipes (ISO 15875-2)
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
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)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology 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
3.2
compression fitting
connecting piece for pipes and other piping accessories, equipped with minimum one compression end,
sealing by elastomeric gaskets on a smooth walled pipe end
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 pipe support
3.5
non-end-load resistant joint
joint which cannot resist axial loads without additional external mechanical pipe support
3.6
fitting size
size designation of the nominal outside diameter, d , of the connecting PE pipe or of the size of the jointing
n
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 by a compression end or other threaded 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 tightening of a nut or fastening of a flange to compress a
grip or locking ring onto the outside wall of the tube to create a pressure tight connection
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 appropriate 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
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
demountability
characteristic 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
pipe threads where pressure-tight joints are made on threads
Note 1 to entry: Pipe threads in this instance are according to EN 10226-1.
3.18
fastening thread
pipe threads where pressure-tight joints are not made on threads
Note 1 to entry: The pressure-tight joint is made by compressing two sealing surfaces outside the thread,
optionally by using an appropriate seal.
Note 2 to entry: Pipe threads in this instance are according to 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
characteristic 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
4 Types of fittings
Types and shapes of fittings are to the discretion of the manufacturer and therefore not standardized or
limited regarding measurements.
NOTE Spigot ends of fittings and valves are also not covered by this document.
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
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.
5.3 Material of the fitting components
Materials of the internal parts of the fittings, either made of metal or plastic in contact with PE pipe shall
not adversely affect pipe performance, e.g. by initiation of stress cracking. If a lubricant 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 depending on the specific
application. For drinking water application, it shall be in accordance with EN 681-1 and for gas supply
according to EN 682, and/or EN 549 and shall conform to the appropriate class and type.
NOTE For the choice of elastomeric materials, national regulations can apply.
6 Corrosion protection
6.1 General
In applications where corrosion protection is required, the components shall be adequately protected as
follows.
NOTE For the choice of corrosion protection, national regulations can apply.
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 shall 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 can apply.
6.2.3 Coating mass per surface unit and layer thickness
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
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
m is the surface related mass of the zinc coating in g/m .
A
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 and non-metallic remainders.
6.3 Non-metallic coating
Depending on the specific application, appropriate non-metallic coatings may be used for both internal
and external corrosion protection, if agreed with the purchaser.
NOTE If the non
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