SIST EN 12115:2021

SLOVENSKI STANDARD
oSIST prEN 12115:2019
01-november-2019
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: prEN 12115
ICS:
83.140.40 Gumene cevi Hoses
oSIST prEN 12115:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12115:2019

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oSIST prEN 12115:2019


DRAFT
EUROPEAN STANDARD
prEN 12115
NORME EUROPÉENNE

EUROPÄISCHE NORM

September 2019
ICS 23.040.70 Will supersede 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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 218.

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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12115:2019 E
worldwide for CEN national Members.

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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
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Annex G (informative) Environmental checklist . 45
Bibliography . 47

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European foreword
This document (prEN 12115:2019) 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 document is currently submitted to the CEN Enquiry.
This document will supersede 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.
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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.
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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
1)
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)
1 bar = 0,1 MPa.
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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 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 8031:2009, Rubber and plastics hoses and hose assemblies - Determination of electrical resistance
and conductivity (ISO 8031:2009)
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
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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 http://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 8031:2009, 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
9
exceeding 10 Ω;
— Grade Ω/T: electrically conductive and with an electrical resistance through the hose wall not
9
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.
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.
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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
bore diameter diameter b stability
mm mm mm radius
mm mm bar
mm
a cover
lining
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.
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Table 2 — Dimension requirements, Type SD hoses
Nominal Inside Tolerance Outside Tolerance Minimum Min. bend Resistance
bore diameter diameter thickness b to vacuum
mm mm radius
mm mm mm bar
mm
a cover
lining
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).
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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
200
3
4.1 black filled compound max —
mm
ISO 4649:2017
Method A
non-black filled compound,
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 Material for hose lining and typical applications Recommended colour coding on
Polymer
hose cover
reference
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.
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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 10088-3:2005, 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, either metal or plastics, 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)
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Property Unit Requirement Test method
EN ISO 7326, with
relative humidity
(55 ± 10) %,
ozone concentration
No cracking observed pphm a
(50 ± 5) ,
Ozone resistance —
under × 2 magnification
elongation 20 %.
0
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.
2
10 /assembly-M-grade
EN ISO 8031:2009,
6 Clause 4
10 /assembly-Ω-grade
Electrical properties Ω
9
EN ISO 8031:2009, 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
2
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”.
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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
6
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
9
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
are 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 8031:2009, 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
...