EN 12115:2021
(Main)Rubber and thermoplastics hoses and hose assemblies for liquid or gaseous chemicals - Specification
Rubber and thermoplastics hoses and hose assemblies for liquid or gaseous chemicals - Specification
This document specifies requirements for two types of hose assemblies (Types D and SD) and four grades based on electrical properties with hoses made of rubber or thermoplastics and hose fittings made of metal designed to convey liquid or gaseous chemical substances, hereinafter termed the "chemicals conveyed".
The hose assemblies are intended for use with chemicals conveyed in the temperature range of -20 °C to +65 °C at a working pressure ≤ 10 bar1.
NOTE 1 This document sets out requirements for these hose assemblies to ensure that users are not exposed to danger from fire or explosion and that the environment is protected against contamination or damage.
NOTE 2 Other temperatures and working pressures than those given above can be agreed with the manufacturer, provided that the marking on the hose (see 14.1) states this and the requirements of Table 5 and all the other requirements are met.
NOTE 3 Other diameters than those given in this document can be agreed with the manufacturer.
NOTE 4 This document also provides guidance on the storage of hose assemblies (Clause 15).
NOTE 5 The attention of users is drawn to Annex F concerning the selection of lining material related to the chemical(s) to be conveyed by the hoses and/or hose assemblies.
This document does not apply to hose assemblies for:
- aircraft refuelling (EN ISO 1825);
- fuel dispensing (EN 1360);
- oil burners (EN ISO 6806);
- refrigerant circuits;
- fuel truck delivery (EN 1761);
- liquid petroleum gases (LPG) (EN 1762, EN 16436-2);
- fire-fighting (EN ISO 14557);
- oil suction and discharge (EN 1765);
- rotary drilling (EN ISO 6807);
- fuel dispensing with vapour recovery systems (EN 13483);
- anhydrous ammonia (EN ISO 5771).
This document does not apply to multilayer hose assemblies (EN 13765 and EN 13766).
Gummi- und Kunststoffschläuche und -schlauchleitungen für flüssige oder gasförmige Chemikalien - Anforderungen
Dieses Dokument legt Anforderungen fest für zwei Typen (Typ D und Typ SD) und, auf Grundlage ihrer elektrischen Eigenschaften, vier Klassen von Schlauchleitungen mit Schläuchen aus Gummi oder Thermoplasten und Schlaucharmaturen aus Metall zum Fördern von flüssigen oder gasförmigen Stoffen; diese werden im Folgenden „geförderte Chemikalien“ genannt.
Die Schlauchleitungen sind für den Einsatz mit den geförderten Chemikalien im Temperaturbereich von −20 °C bis +65 °C bei einem Betriebsdruck von ≤ 10 bar1 vorgesehen.
ANMERKUNG 1 Dieses Dokument legt Sicherheitsanforderungen für diese Schlauchleitungen fest, damit Anwender keinen Gefahren durch Brand oder Explosionen ausgesetzt werden und damit die Umwelt vor Verunreinigungen oder Schäden geschützt ist.
ANMERKUNG 2 Andere Temperaturen und Betriebsdrücke als die oben genannten können mit dem Hersteller vereinbart werden, vorausgesetzt, dass die Kennzeichnung auf dem Schlauch dies angibt (siehe 14.1) und die Anforderungen der Tabelle 5 sowie alle anderen Anforderungen eingehalten werden.
ANMERKUNG 3 Andere Durchmesser als die in diesem Dokument genannten können mit dem Hersteller vereinbart werden.
ANMERKUNG 4 Dieses Dokument gibt auch Hinweise für die Lagerung von Schlauchleitungen (siehe Abschnitt 15).
ANMERKUNG 5 Der Anwender wird auf Anhang F hingewiesen hinsichtlich der Auswahl des Werkstoffes für die Innenschicht, bezogen auf die mit dem Schlauch und/oder der Schlauchleitung zu fördernde(n) Chemikalie(n).
Dieses Dokument gilt nicht für Schlauchleitungen für:
- Flugzeugbetankung (EN ISO 1825);
- Kraftstoffabgabe (EN 1360);
- Ölbrenner (EN ISO 6806);
- Kältemittelkreisläufe;
- Tankwagen für Kraftstoffe (EN 1761);
- Flüssiggase (LPG) (EN 1762, EN 16436 2);
- Feuerwehren (EN ISO 14557);
- Ansaugen und Fördern von Öl (EN 1765);
- Rotary Bohren (EN ISO 6807);
- Kraftstoffabgabe mit Gasrückführung (EN 13483);
- wasserfreies Ammoniak (EN ISO 5771).
Dieses Dokument gilt nicht für mehrlagige Schlauchleitungen (EN 13765 und EN 13766).
Tuyaux et assemblages flexibles en caoutchouc et en matériaux thermoplastiques pour substances chimiques liquides ou gazeuses - Spécifications
Le présent document spécifie les exigences relatives à deux types d’assemblages flexibles (Types D et SD)
et quatre classes basées sur les propriétés électriques, constitués de tuyaux en caoutchouc ou en
matériaux thermoplastiques et d'embouts métalliques conçus pour véhiculer des substances chimiques
liquides ou gazeuses, ci-après désignés « produits chimiques véhiculés ».
Les assemblages flexibles sont destinés à être utilisés avec des produits chimiques véhiculés dans une
plage de température de -20 °C à +65 °C à une pression de service 10 bar1.
NOTE 1 Le présent document établit des exigences pour ces assemblages flexibles afin de s’assurer que les
utilisateurs ne sont pas exposés à des risques dus à un incendie ou à une explosion et que l’environnement est
protégé contre tout dommage ou pollution.
NOTE 2 D’autres températures et pressions de service que celles données ci-dessus peuvent faire l’objet d’un
accord avec le fabricant, à condition que le marquage apposé sur le tuyau (voir 14.1) fasse état de ces informations
et que les exigences du Tableau 5 et toutes les autres exigences soient atteintes.
NOTE 3 D’autres diamètres que ceux donnés dans le présent document peuvent faire l’objet d’un accord avec le
fabricant.
NOTE 4 Le présent document fournit également des indications concernant le stockage des assemblages flexibles
(Article 15).
NOTE 5 L’attention des utilisateurs est attirée sur l’Annexe F concernant le choix du matériau du tube intérieur
en fonction du(des) produit(s) chimique(s) à véhiculer par les tuyaux et/ou les assemblages flexibles.
Le présent document ne s’applique pas aux assemblages flexibles utilisés pour :
- le ravitaillement des avions (EN ISO 1825) ;
- la distribution de carburant (EN 1360) ;
- les brûleurs à huile (EN ISO 6806) ;
- les circuits réfrigérants ;
- la livraison de carburant par camion (EN 1761) ;
- le gaz de pétrole liquéfié (GPL) (EN 1762, EN 16436-2) ;
- la lutte contre les incendies (EN ISO 14557) ;
- le chargement et le déchargement de produits pétroliers (EN 1765) ;
- le forage rotatif (EN ISO 6807) ;
- la distribution de carburants avec système de récupération de vapeur (EN 13483) ;
- l’ammoniac anhydre (EN ISO 5771).
Le présent document ne s'applique pas aux assemblages flexibles multicouches (EN 13765 et EN 13766).
Gumene in plastomerne cevi ter cevni priključki za tekoče in plinaste kemikalije - Specifikacija
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2021
Nadomešča:
SIST EN 12115:2011
Gumene in plastomerne cevi ter cevni priključki za tekoče in plinaste kemikalije -
Specifikacija
Rubber and thermoplastics hoses and hose assemblies for liquid or gaseous chemicals -
Specification
Gummi- und Kunststoffschläuche und -schlauchleitungen für flüssige oder gasförmige
Chemikalien - Anforderungen
Tuyaux et assemblages flexibles en caoutchouc et en matériaux thermoplastiques pour
substances chimiques liquides ou gazeuses - Spécifications
Ta slovenski standard je istoveten z: EN 12115:2021
ICS:
83.140.40 Gumene cevi Hoses
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12115
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2021
EUROPÄISCHE NORM
ICS 23.040.70 Supersedes EN 12115:2011
English Version
Rubber and thermoplastics hoses and hose assemblies for
liquid or gaseous chemicals - Specification
Tuyaux et assemblages flexibles en caoutchouc et en Gummi- und Kunststoffschläuche und -
matériaux thermoplastiques pour substances schlauchleitungen für flüssige oder gasförmige
chimiques liquides ou gazeuses - Spécifications Chemikalien - Anforderungen
This European Standard was approved by CEN on 13 December 2020.
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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12115:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Classification . 8
5 Couplings and end fittings . 8
6 Materials and construction . 8
6.1 General . 8
6.2 Lining . 8
6.3 Cover . 9
6.4 Reinforcement . 9
6.5 Helical wires . 9
7 Dimensions and tolerances, typical masses . 9
7.1 Diameters, thickness, vacuum stability, bend radii and resistance to vacuum . 9
7.2 Concentricity . 10
7.3 Length of hose assemblies . 10
8 Physical properties of materials used for hoses . 10
8.1 General . 10
8.2 Materials used for the lining . 11
8.3 Material of the helix . 12
8.4 Materials of the end fittings and couplings . 12
9 Performance requirements of hoses and hose assemblies . 12
10 Electrical properties . 13
11 Frequency of testing . 14
12 Type tests . 14
13 Test report . 14
14 Marking . 15
14.1 Hoses . 15
14.2 Hose fittings . 15
14.3 Identification of hose assemblies . 15
15 Storage and admissible storage time . 16
Annex A (normative) Test frequency for type tests and routine tests . 17
Annex B (informative) Production acceptance tests . 18
Annex C (informative) Couplings and fittings . 19
Annex D (normative) Crush recovery test (for SD hoses only) . 20
Annex E (normative) Flammability test . 22
Annex F (informative) Resistance to chemicals conveyed . 24
Annex G (informative) Environmental checklist . 44
Bibliography . 46
European foreword
This document (EN 12115:2021) has been prepared by Technical Committee CEN/TC 218 “Rubber and
plastics hoses and hose assemblies”, the secretariat of which is held by BSI.
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 July 2021, and conflicting national standards shall be
withdrawn at the latest by July 2021.
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 12115:2011.
In comparison with EN 12115:2011 the following changes have been made:
— the scope now excludes hose assemblies for anhydrous ammonia (EN ISO 5771);
— the normative references have been updated;
— in subclause 14.3, “Identification of hose assemblies”, a permission has been added that bands may
be replaced by permanently adhered labelling bearing the same information, e.g. coloured labels at
the coupling;
— a warning has been added at the beginning of informative Annex F, “Resistance to chemicals
conveyed” to explicitly point out that the Annex has not been changed compared to
EN 12115:2011;
— an environmental checklist (informative Annex G) has been added;
— the document has been editorially revised.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Turkey and the
United Kingdom.
Introduction
This document has been prepared to provide minimum acceptable requirements for the satisfactory
performance of flexible rubber and thermoplastics hoses and hose assemblies with unspecified
reinforcement and linings of different types of synthetic rubbers and thermoplastics, for each chemical
substance conveyed.
A list of hose lining material resistant to specific chemical substances, identified by CAS number, is
given as Annex F (informative). This list is for informational purposes only.
1 Scope
This document specifies requirements for two types of hose assemblies (Types D and SD) and four
grades based on electrical properties with hoses made of rubber or thermoplastics and hose fittings
made of metal designed to convey liquid or gaseous chemical substances, hereinafter termed the
“chemicals conveyed”.
The hose assemblies are intended for use with chemicals conveyed in the temperature range of –20 °C
to +65 °C at a working pressure ≤ 10 bar .
NOTE 1 This document sets out requirements for these hose assemblies to ensure that users are not exposed to
danger from fire or explosion and that the environment is protected against contamination or damage.
NOTE 2 Other temperatures and working pressures than those given above can be agreed with the
manufacturer, provided that the marking on the hose (see 14.1) states this and the requirements of Table 5 and all
the other requirements are met.
NOTE 3 Other diameters than those given in this document can be agreed with the manufacturer.
NOTE 4 This document also provides guidance on the storage of hose assemblies (Clause 15).
NOTE 5 The attention of users is drawn to Annex F concerning the selection of lining material related to the
chemical(s) to be conveyed by the hoses and/or hose assemblies.
This document does not apply to hose assemblies for:
— aircraft refuelling (EN ISO 1825);
— fuel dispensing (EN 1360);
— oil burners (EN ISO 6806);
— refrigerant circuits;
— fuel truck delivery (EN 1761);
— liquid petroleum gases (LPG) (EN 1762, EN 16436-2);
— fire-fighting (EN ISO 14557);
— oil suction and discharge (EN 1765);
— rotary drilling (EN ISO 6807);
— fuel dispensing with vapour recovery systems (EN 13483);
— anhydrous ammonia (EN ISO 5771).
This document does not apply to multilayer hose assemblies (EN 13765 and EN 13766).
1 bar = 0,1 MPa.
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 10244-2, Steel wire and wire products - Non-ferrous metallic coatings on steel wire - Part 2: Zinc or
zinc alloy coatings
EN 10270-1, Steel wire for mechanical springs - Part 1: Patented cold drawn unalloyed spring steel wire
EN 10270-2, Steel wire for mechanical springs - Part 2: Oil hardened and tempered spring steel wire
EN ISO 1402, Rubber and plastics hoses and hose assemblies - Hydrostatic testing (ISO 1402)
EN 10088-3:2014, Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars,
rods, wire, sections and bright products of corrosion resisting steels for general purposes
EN ISO 4671, Rubber and plastics hoses and hose assemblies - Methods of measurement of the dimensions
of hoses and the lengths of hose assemblies (ISO 4671)
EN ISO 7233, Rubber and plastics hoses and hose assemblies - Determination of resistance to vacuum (ISO
7233)
EN ISO 7326, Rubber and plastics hoses - Assessment of ozone resistance under static conditions (ISO
7326)
EN ISO 8031:2020, Rubber and plastics hoses and hose assemblies - Determination of electrical resistance
and conductivity (ISO 8031:2020)
EN ISO 8033, Rubber and plastics hoses - Determination of adhesion between components (ISO 8033)
EN ISO 8330:2014, Rubber and plastics hoses and hose assemblies - Vocabulary (ISO 8330:2014)
EN ISO 10619-1, Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness - Part 1:
Bending tests at ambient temperature (ISO 10619-1)
EN ISO 10619-2:2018, Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness -
Part 2: Bending tests at sub-ambient temperatures (ISO 10619-2:2017)
ISO 37, Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties
ISO 188, Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests
ISO 1817, Rubber, vulcanized or thermoplastic - Determination of the effect of liquids
ISO 4649:2017, Rubber, vulcanized or thermoplastic - Determination of abrasion resistance using a
rotating cylindrical drum device
BS 3592-1:1986, Steel wire for hose reinforcement - Specification for coated round and flat steel wire for
rubber hose reinforcement
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 8330:2014 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
NOTE In this document the word “fitting” has been used; this is, in some cases, interchangeable with the
word “coupling”.
4 Classification
Hoses and hose assemblies for this application shall be divided into two types, according to their duty
requirements:
— Type D: hoses and hose assemblies for delivery duty only;
— Type SD: hoses and hose assemblies for suction and delivery duty.
Hoses and hose assemblies for this application shall be divided into four grades:
— Grade M: electrically bonded;
— Grade Ω: electrically conductive; see EN ISO 8031:2020, Annex A for new recommended marking to
indicate conductive lining, conductive cover or conductive lining and cover;
— Grade M/T: electrically bonded and with an electrical resistance through the hose wall not
exceeding 10 Ω;
— Grade Ω/T: electrically conductive and with an electrical resistance through the hose wall not
exceeding 10 Ω.
5 Couplings and end fittings
Hoses shall be fitted with end fittings and couplings to form hose assemblies. Examples are given in
Annex C.
6 Materials and construction
6.1 General
Hose Type D shall consist of a lining, reinforcement and a cover.
Hose Type SD shall consist of a lining, reinforcement and a cover, and in addition incorporate one or
more helixes.
An environmental checklist is given in Annex G.
6.2 Lining
The lining shall be resistant to the chemical substances conveyed. The lining shall be uniform in quality
and thickness and shall be free from porosity, air holes, foreign inclusions and other defects which
could impair the expected use.
6.3 Cover
The cover shall be resistant to mechanical damage, wear and environmental effects due to weather and
short-term chemical exposure.
6.4 Reinforcement
The reinforcement shall consist of a textile material which is resistant to the medium conveyed.
6.5 Helical wires
The helix or helixes shall be fully embedded into the hose wall so that contact with the medium
conveyed is avoided.
7 Dimensions and tolerances, typical masses
7.1 Diameters, thickness, vacuum stability, bend radii and resistance to vacuum
The inside and outside diameters of the hoses, the minimum thickness of lining and cover and the
minimum bend radius shall conform to the values given in Table 1 or Table 2 (depending on the type).
The Type D hoses shall be able to withstand an internal vacuum as specified in Table 1 (vacuum
stability) without collapse or changes in diameter and length in excess of the values specified in Table 5.
Table 1 — Dimension requirements, Type D hoses
Nominal Inside Tolerance Outside Tolerance Minimum thickness Min. bend Vacuum
b
bore diameter diameter radius stability
mm mm mm
mm mm mm bar
a
lining cover
13 13,0 23,0 90
–0,5
19 19,0 31,0 125
25 25,0 ±0,5 37,0 ±1,0 2,0 1,6 150
32 32,0 44,0 175 –0,4
38 38,0 51,0 225
50 50,0 66,0 275
±0,7 –0,3
51 51,0 67,0 275
63 63,0 79,0 ±1,2 300
c
75 75,0 91,0 2,0 2,0 350
c
76 76,0 ±0,8 92,0 350 —
c
100 100,0 116,0 450
±1,6
c
101,5 101,5 118,0 450
a
The dimensions for the minimum lining thickness do not apply to hoses made from materials PE-X/UPE and fluoro-plastics.
The thickness for these materials shall be 0,4 mm.
b
The bend radii specified do not apply to hoses made from PE-X/UPE and fluoro-plastics where the value shall be 1,5 × the
values shown above.
c
Only applies to operation at not less than 1 bar, otherwise the hose will kink.
The Type SD hoses shall be able to withstand an internal vacuum as specified in Table 2 (resistance to
vacuum) and shall conform to the requirements specified in Table 5.
Table 2 — Dimension requirements, Type SD hoses
Nominal Inside Tolerance Outside Tolerance Minimum Min. bend Resistance
b
bore diameter diameter thickness radius to vacuum
mm mm
mm mm mm mm bar
a
lining cover
19 19,0 31,0 125
25 25,0 37,0 150
±0,5 ±1,0 1,6 1,6
32 32,0 44,0 175
38 38,0 51,0 225
50 50,0 66,0 275
±0,7 ±1,2 1,7 1,7
51 51,0 67,0 275 –0,8
63 63,0 79,0 300
75 75,0 91,0 ±1,2 1,7 350
76 76,0 ±0,8 92,0 1,8 350
100 100,0 116,0 450
±1,6 2,0
101,5 101,5 118,0 450
a
The dimensions for the minimum lining thickness do not apply to hoses made from materials PE-X/UPE and
fluoro-plastics. The thickness for these materials shall be 0,4 mm.
b
The bend radii specified do not apply to hoses made from PE-X/UPE and fluoro-plastics where the value shall
be 1,5 × the values shown above.
7.2 Concentricity
When determined in accordance with EN ISO 4671, the concentricity, based on a total indicator reading
between the internal diameter and the outside surface of the cover, shall be ≤ 1,0 mm for hoses ≤ 51
nominal bore and ≤ 1,5 mm for hoses > 51 nominal bore.
7.3 Length of hose assemblies
The length of the hose assembly shall be the intended installed length measured from sealing surfaces
of the end fittings.
+15
For hose assembly lengths ≤ 1 000 mm the tolerance shall be mm.
−10
+1,5
For hose assembly lengths > 1 000 mm the tolerance shall be %.
−10,
8 Physical properties of materials used for hoses
8.1 General
The physical properties of the materials used for the lining and cover shall conform to the values given
in Table 3, when tested in accordance with the methods listed in Table 3. Tests shall be carried out
either on samples taken from the hose or from separately vulcanized sheets (to the same degree as the
hose).
The cover is not intended to be in contact with the chemical conveyed. Whenever such contact occurs
the cover of the hose should be examined for harmful effects.
Table 3 — Physical properties of materials
Item Property Unit Requirement Test method
lining cover
ISO 37
1 Tensile strength min. MPa 8,0 8,0
(dumbbell test pieces)
2 Elongation at break
2.1 Fluro-rubber (FKM) 150 150
ISO 37
min. %
(dumbbell test pieces)
2.2 Other materials, see Table 4 250 250
3 Ageing
3.1 Tensile strength change — 15
% from the ISO 188 (air oven method)
max.
un-aged value 7 days at (70 ± 1) °C
3.2 Elongation at break change — 20
4 Abrasion resistance
4.1 black filled compound — 200
ISO 4649:2017
max.
mm
non-black filled compound,
Method A
4.2 — 350
coloured
8.2 Materials used for the lining
The lining shall be made from the range of materials given in Table 4.
NOTE The characteristics within a material group can vary, e.g. dependent upon the type of polymer, ratio of
the mixture and vulcanization method.
Table 4 — Material groups for hose lining
a
Polymer Material for hose lining and typical applications Recommended colour coding on
reference hose cover
Hoses for mineral oil products of all
NBR 1 Yellow
types less than 50 % aromatic
Acrylonitrile butadiene
Hoses for aromatic and chlorinated
NBR 2 rubbers Blue
hydrocarbons and solvents
NBR 3 Hoses for oily foodstuffs White
NR Isoprene rubber (natural rubber), e.g. for potable alcohol No recommended colour
IIR Isobutene/Isoprene rubber (butyl rubber)
Lilac
Terpolymers made from ethylene, propylene and a diene with an
EPDM
unsaturated part portion of the diene in the side chain
CSM Chlorosulfonated polyethylene Green
Rubbers with fluoro, fluoroalkyl or fluoroalkoxy groups on the polymer
FKM Green and white
chain (fluoro-rubber)
PE-X/UPE Cross-linked polyethylene/ultra-high molecular polyethylene Blue and white
b
Fluoro-plastics (e.g. PTFE, PFA, FEP…) Blue and white and a third colour
a
For alphabetic abbreviations, see ISO 1629.
b
No reference is given. Details of materials and their resistance against the chemical conveyed shall be agreed from
manufacturer's information, see Annex F.
Other materials may be agreed between the manufacturers and user, but all requirements of this
document shall be met.
8.3 Material of the helix
The helix or helixes shall consist of galvanized hard or mild steel wire, in accordance with EN 10270-1
or EN 10270-2 (galvanized to EN 10244-2), or to BS 3592-1:1986. Alternatively, the helix or helixes
may, when required, consist of stainless steel wire, in accordance with EN 10088-3:2014, steel numbers
1.4306, 1.4401, 1.4404 or 1.4436.
8.4 Materials of the end fittings and couplings
The material of end fittings and couplings shall be chemically resistant to the substance conveyed.
Information concerning suitability of various metals is given in Annex F.
9 Performance requirements of hoses and hose assemblies
The physical properties of the finished hose and hose assemblies shall conform to the values given in
Table 5, when tested in accordance with the appropriate methods given in Table 5.
Table 5 — Performance requirements of hoses and hose assemblies
Property Unit Requirement Test method
No leakage or other signs
Proof test pressure — of weakness at 1,5 × the EN ISO 1402
working pressure
Change in length
maximum allowed:
— at proof test pressure Type D 0 to +8
% EN ISO 1402
Type SD 0 to +10
— at −0,8 respectively −0,9 bar
Type SD −2 %
vacuum
Twist at proof test pressure °/m maximum 8 EN ISO 1402
Resistance to vacuum; No failure, no collapse, no
Vacuum according to Table 2 — blisters or delamination of EN ISO 7233
for 10 min lining (Type SD)
Vacuum stability; No changes in diameter
Vacuum according to Table 1 for % and/or length > –2 % EN ISO 7233
10 min (Type D)
Burst pressure minimum four times the
bar EN ISO 1402
working pressure
Adhesion between components,
N/mm minimum 2,4 EN ISO 8033
dry
Crush recovery, Type SD only
% maximum 3 Annex D
(peak compressive strength test)
Property Unit Requirement Test method
EN ISO 7326, with
relative humidity
(55 ± 10) %,
ozone concentration
a
No cracking observed
(50 ± 5) pphm ,
Ozone resistance —
under × 2 magnification
elongation 20 %.
Test duration: ( 72 ) h.
−2
Test temperature:
(40 ± 2) °C
a) Burning with a naked
flame to cease within
20 s of removal of the
burner;
Flammability test — b) No further glowing Annex E
visible 2 min after
removal of the burner;
c) Hose shall show no
sign of leakage.
10 /assembly-M-grade
EN ISO 8031:2020,
6 Clause 4
10 /assembly-Ω-grade
Electrical properties Ω
EN ISO 8031:2020, 4.9
10 /hose wall-T-grade
Deformation of the external hose
diameter during bending test (at
min. bending radius with, for % 10 EN ISO 10619-1
Type D only, an internal pressure
of 0,7 bar)
No permanent
EN ISO 10619-2:2018,
Flexibility at –20 °C — deformation or visible
Method B
structural damage
a
The rubber industry expresses ozone concentration as parts per hundred million parts of air (pphm), a
−6
dimensionless quantity equivalent to 1× 10 % .
10 Electrical properties
The electrical resistance of hoses and hose assemblies can be obtained by two methods:
a) Incorporating two low resistance bonding wires into the hose construction. These shall be spirally
applied and shall be positioned in such a way to cross uniformly.
When attaching fittings to these hoses, the bonding wires shall be folded into the hose bore,
securely positioned between the lining and the fitting tail, and extended a minimum of one third of
the length of the fitting tail into the bore.
When tested in accordance with EN ISO 8031, the resistance along the bonding wires, in the case of
hoses, or the resistance between fittings, in the case of hose assemblies, shall not exceed 10 Ω per
length. When obtaining electrical continuity by this method the hose shall be marked with the
symbol “M”.
b) Incorporating electrically conducting materials in the hose construction. When attaching fittings to
these hoses, an adequate connection between the end-fittings and the conductive layer shall be
made. Conductive layers can be either lining, cover or both lining and cover.
When tested in accordance with EN ISO 8031, the resistance along the conductive layer in the case
of hoses, or the resistance between the fittings in the case of hose assemblies, shall not exceed
10 Ω per length. When obtaining electrical resistance by this method the hose shall be marked
with the symbol “Ω “.
c) When there is a need for hose assemblies of a) or b) with an electrical resistance through the hose
wall of not more than 10 Ω these hoses shall be marked with an additional symbol “/T”, e.g. “M/T”
or “Ω/T”. Such hose assemblies are required in situations where dissipation of electrostatic charges
is a safety requirement (i.e. in explosive environments).
The test procedure to determine the electrical resistance through the hose wall is given in
EN ISO 8031:2020, 4.9. This test will only give representative results when it is conducted on a hose
assembly of identical construction and materials, with the same type of fittings and materials as the
production hose which is intended for this service.
During and after subjection to the hydrostatic tests as given in EN ISO 1402, electrical continuity of each
hose shall be maintained from end to end and electrical continuity of each hose assembly shall be
maintained from one fitting to the other.
Electrical conductivity in Type SD shall not be obtained by only connecting the fittings to the helixes.
The properties required in c) shall be verified for each design during type testing only.
11 Frequency of testing
The minimum frequency of testing shall conform to the schedule given in Annex A.
Type tests are tests to verify that the hose or hose assembly conforms to all requirements of this
document.
Routine tests are tests on each length of finished hose or hose assembly.
Production acceptance tests are those tests carried out per batch or 10 batches, see the schedule given
in Annex B, Table B.1 (this is for guidance only).
12 Type tests
Type tests shall be carried out in order to confirm that all the material, construction and test
requirements of this document have been met by the method of manufacture and hose design.
Type tests shall be repeated at a minimum of every five years or whenever there is a change in design,
method of manufacture or materials.
Type tests shall be performed on at least a reference diameter of a hose e.g. 50 mm inner diameter (I.D.)
of each design in the manufacturer's range for each type.
13 Test report
When requested by the purchaser, the manufacturer or supplier shall provide a test report with each
length or batch of hoses or hose assemblies supplied to the purchaser.
In this report all hoses, or hose assemblies, shall be positively identified by batch or serial number, and
all test results shall be recorded.
14 Marking
14.1 Hoses
All hoses shall be continuously marked by relief embossing or branding which is clearly legible and
durable, in medium spaced lettering, with a letter height of at least 5 mm.
Unless otherwise agreed, the length of the identification according to the identification example shall
not exceed 500 mm.
The hoses shall be colour-coded in accordance with Table 4.
The following information, at least, shall be marked:
a) manufacturer’s name or identification, e.g. XXXX.;
b) number and date of this document, i.e. EN 12115:2021;
c) material of hose lining, e.g. IIR, EPDM…;
d) hose type, D or SD;
e) nominal bore, e.g. 38;
f) maximum working pressure, in bar, e.g. 10 bar;
g) operating temperature range, e.g. –20 °C to +65 °C;
h) symbol to identify electrical conductivity, e.g. Ω, respectively Ω/T;
i) quarter and year of manufacture, e.g. 3Q20.
EXAMPLE XXXX — EN 12115:2021 — EPDM — D — 38 — 10 bar — –20 °C to +65 °C — Ω — 3Q20.
14.2 Hose fittings
The fittings shall be permanently marked, at least, with the following information:
— manufacturer's name or trademark;
— type and nominal size;
— material;
— maximum working pressure of the fitting.
It is the responsibility of the user to verify that the maximum working pressure of the hose assembly is
suitable for safe use at the operating pressure in the user's system. This maximum working pressure of
the assembly may be lower than the maximum working pressure marked on the hose.
For further information, see ISO/TR 17784.
14.3 Identification of hose assemblies
Before they are used for the first time, hose assemblies in accordance with this document shall have two
stainless steel identification bands (see below) in addition to the marking specified in 14.1 and 14.2.
These bands shall be fixed by the assembler onto the hose assembly near the fitting. Identification
details shall be marked clearly, legibly and durably, for example, by engraving.
Band 1 shall remain permanently in position on the hose assembly.
Each time hose assemblies are routinely tested, Band 2 shall be removed and replaced by the operator
with a new band bearing the new identification details given for Band 2 below.
Alternatively, bands may be replaced by permanently adhered labelling bearing the same information,
e.g. coloured labels at the coupling.
Band 1
a) operator registration number (to identify the hose assembly), assembler no. (e.g. building counter
number);
b) admissible operating pressure p , e.g. −0,8 bar to +10 bar;
adm
c) admissible operating temperature range t (only when this deviates from the temperature range
adm
−20 °C to +65 °C);
d) symbol to identify electrical conductivity, e.g. Ω; respectively Ω/T; Ω–L, Ω–C, Ω–CL or M, M/T;
e) date of assembly, e.g. month and year.
EXAMPLE No. XXX 0123 — padm (−0,8 bar to +10 bar) — tadm (−30 °C to +80 °C) — Ω — 10/20.
Band 2
f) test laboratory (only if this cannot be ascertained with a documentation registration number);
g) the date of end fitting re-test, e.g. 10/20;
2)
h) the date the next test is due, month and year, e.g. 06/21 .
EXAMPLE NNNN — fitted (tested) on 10/20 — next test due 06/21.
15 Storage and admissible storage time
The recommendations for storing hoses and hose assemblies are given in EN ISO 8331.
Once hoses and hose assemblies have been stored for three years with effect from the date of
manufacture or from the last test, they should be subjected to a further routine testing in accordance
with Table A.1 before use.
2) Test period will be given by the user.
Annex A
(normative)
Test frequency for type tests and routine tests
The minimum frequency of test for type tests and routine tests shall be as specified in Table A.1.
Table A.1 — Test frequency for type tests and routine tests
Property Type tests Routine tests
Material tests
Tensile strength and elongation X N/A
Tensile strength and elongation after ageing X N/A
Abrasion resistance X N/A
Resistance to chemicals X N/A
Hose tests
Adhesion between components, dry X N/A
Ozone resistance X N/A
Bending test X N/A
Measurement of inside and outside diameters X X
Measurement of thickness (lining and cover) X X
Measurement of concentricity X X
Proof pressure X X
Burst pressure X N/A
Resistance to vacuum X N/A
Electrical properties for M- and Ω-grades X X
Electrical properties for T-grade (M/T or Ω/T) X N/A
Flexibility at –20 °C X N/A
Crush recovery test X N/A
Flammability test X N/A
Hose assembly tests
Proof pressure X X
Change in length and twist at proof of pressure X N/A
Resistance to vacuum (Type SD only) X N/A
Vacuum stability (Type D only) X N/A
Burst pressure X N/A
Electrical properties between fittings (for all grades) X X
X = test required
N/A = not applicable
Annex B
(informative)
Production acceptance tests
The frequency of test for production acceptance tests should be as specified in Table B.1.
Table B.1 — Production acceptance tests
Property Production acceptance tests
a a
per batch per 10 batches
Material tests
Tensile strength and elongation X N/A
Tensile strength and elongation after ageing N/A X
Abrasion resistance N/A N/A
Resistance to chemicals N/A N/A
Hose tests
Adhesion between components, dry X N/A
Ozone resistance N/A X
Bending test N/A X
Measurement of inside and outside diameters N/A N/A
Measurement of thickness (lining and cover) N/A N/A
Measurement of concentricity N/A N/A
Proof pressure N/A N/A
Burst pressure N/A X
Resistance to vacuum N/A X
Electrical properties N/A N/A
Flexibility at –20 °C N/A X
Crush recovery test N/A X
Flammability test N/A N/A
Hose assembly tests
— N/A N/A
X = test required
N/A = not applicable
a
A batch is defined as either 1 000 m hose or 2 000 kg of lining and/or cover compound.
Annex C
(informative)
Couplings and fittings
Hoses can be fitted with the following coupling types to form hose assemblies.
— Built-in (special cases only):
— clamped;
— swaged or crimped.
— The end fitting can be of the following connection type:
— quick release/quick acting;
— screw thread;
— flanged;
— union;
— special types (e.g. camlock, Storz, claw type, etc.).
Preference should be given to fittings and couplings as described in EN 14420-1 to EN 14420-8.
Guidance on coupling types is given in ISO/TR 17784.
Annex D
(normative)
Crush recovery test (for SD hoses only)
Place a test piece of length l ≥ 350 mm on a rigid, flat base plate so that it is not taut.
Place a 100 mm square 10 mm thick test plate with the edge rounded off to R = 0,5 mm centrally on the
test piece. Measure the distance between two plates, the original outside diameter, ( d ), (see
Figure D.1).
Apply test force, F, (see Table D.1) to the test plate for a period of 3 min.
The hose outside diameter can be reduced ≤ 15 % at this stage.
Remove the test force, and after 5 min remeasure the distance between the two plates ( d ).
Calculate the reduction as a percentage.
dd−
1 2
d × 100
d
Table D.1 — Test force
Nominal bore Test force
F
N
≤ 50 1 500 ± 10
> 50 2 000 ± 10
∆=
Dimensions in millimetres
Key
1 test force, F
2 test plate
3 test piece
4 base plate
Figure D.1 — Arrangement for crush recovery test
Annex E
(normative)
Flammability test
E.1 Test pieces
Hose assembly with both ends capped.
E.2 Apparatus
E.2.1 Bunsen burner.
E.2.2 Stopwatch.
E.2.3 Clamps, suitable to hold test assembly.
E.3 Test method
The hose test piece shall be bent into a U-shape of radius according to Figure E.1. The test piece shall be
filled with liquid F according to ISO 1817. The test piece shall be exposed to a naked flame from a
Bunsen burner of 10 mm pipe diameter for a period of 3 min, with the airflow to the burner shut off.
The distance between the burner and test piece shall be according to Figure E.1. The hose sample shall
be deemed to be non-flammable if:
— it ceases to burn with a naked flame within 20 s on removal the burner; and
— there is no further glowing visible 2 min after removing the burner flame.
On completion of the test, the hose test piece shall show no sign of leakage with the test fluids.
Dimensions in millimetres
Key
1 cap
2 bend radius = 10 to 15 times the outside diameter
3 hose assembly
4 liquid F in accordance with ISO 1817
5 propane (LPG) approximately 50 mbar
X position of the burner detail
a
X cross section of detail
Figure E.1 — Arrangement for flammability test
Annex F
(informative)
Resistance to chemicals conveyed
F.1 General
WARNING —This Annex has not been subject to change during this revision of EN 12115 and is
reproduced here without any modifications compared to the previous issue EN 12115:2011. Particular
emphasis is placed on its informative character. As such, it provides additional information intended to
assist the understanding or use of the document. It is the responsibility of the user, in consultation with
the manufacturer, to ensure that the lining of the hoses or hose assemblies is suitable to be resistant to
the chemicals to be conveyed.
Table F.2 gives guidance values for the chemical resistance of hose linings of various materials and
compounds, as well as end fitting materials, to the chemicals listed by their CAS numbers.
CAS number = Chemical Abstracts Service Registry Number
The names of the chemical substances listed by their CAS numbers can be found on the website of the
US organization Chemical Abstracts Service (CAS), http://www.cas.org .
In Table F.2 guide values for the resistance of hose and hose assemblies to the chemicals conveyed,
identified by their CAS-No, are given. They are primarily based on laboratory tests conducted by the
hose manufacturer, generally carried out on tests plates at ambient temperature, obtained from
literature, and experience. If the test temperature deviated from the ambient temperature the relevant
value is given in the appropriate column of Table F.2.
Four suitability groups (A, B, C and H) according to Table F.1 are distinguished.
F.2 Suitability of hose
The suitability of a hose is indicated by the resistance of its lining to the chemical conveyed.
Adequate resistance also means that there is no limit to resistance and retention of the original
properties of the hose, when used correctly. The effect and diffusion capacity of many of the chemicals
conveyed can cause swelling and shrinkage of the hose material, as well as chemical reactions impairing
the properties of the hose and the chemicals conveyed (routine tests at the operators work could
therefore be required to determine operational safety).
These processes occur more quickly and severely with increased operating temperature and pressure,
and affect the end of the service life.
The hose properties as well as the service life of the hose can also be affected by flow rate, wear,
duration and frequency of the effect and by impurities in the chemicals conveyed.
F.3 Resistance of end fitting materials
The details given are guide values. They are based on experience and are taken from relevant literature.
In individual cases, even a slight difference in concentration and admixtures to the chemicals conveyed
or, an increase in temperature, can substantially reduce the resistance to pressure of the metal end-
fitting.
If no relevant experience is available, end-fitting materials shall be individually tested. It should be
noted that pairing of couplings of different material groups (e.g. aluminium and brass) should be
avoide
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