MAN Truck & Bus SE COMPANY STANDARD July 2024

Multi-purpose hoses with textile liners

Type N1 MAN 333
Dimensions in mm
All pressure values are relative pressures (excess pressures)

This English version is a translation. In case of doubt or conflict the valid German-language original will govern.

Contents
1 Scope and purpose
2 Release conditions
3 Dimensions, designation, pressures
4 Requirements
5 Item labelling
6 Storage

1 Scope and purpose

This standard contains dimensions and requirements as well as data for the ordering and marking of hoses
with one or two textile liner(s) for the low pressure range Type N1. Hoses of this type are used for
a continuous temperature of -40 to +100°C and a maximum temperature of 125°C as
- hose pipes in the compressed-air system (10 bar) of commercial vehicles
- hose pipes (return line) in hydraulic systems
- oil pipes on engines and transmissions.
Prolonged exposure to the maximum temperatures is likely to reduce service life.
These hoses are not suitable for applications where a flow medium passes through the hose continuously
(e.g. engine oil sump).
The multi-purpose hoses are in general supplied without wire coils. If hoses with wire coil liners are needed
to stabilise the cross section, this shall be stated in the standard designation (see Section 2). In suction
lines, i.e. at operating vacuums of up to 0,06 bar, a wire coil liner is required as from nominal diameter 32
(with “W” specified in the standard designation).
This standard does not apply to hose pipes in fuel systems on the basis of FAME (fatty acid methyl ester
according to DIN EN 14214), such as plant methyl ester (PME) and RME/diesel fuel mixtures with the
exception of filler hoses, ventilation hoses without constant contact with media at continuous temperatures
up to a maximum of 70°C (maximum temperature 80°C).

2 Release conditions
All parts of MAN 239 standards apply. In these standards the release conditions and procedures as well
as the general terms of delivery for purchased parts are laid down.
The MAN department EOMC at the Nuremberg works is responsible for the material inspection, material
release and for providing information.

Continued on Page 2 to 6

Technical responsibility: Standardization: Replaces: 2014-07

EHOS EHOS
Material group no.: N1 412 001

MAN Truck & Bus SE, Munich plant – Dept. Standardization (EHOS)  All rights reserved according to DIN ISO 16016.
Distribution and use of the contents are not allowed without written permission from MAN Truck & Bus SE.
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MAN 333 : 2024-07

3 Dimensions, designation, pressures

Internal layer Textile liner External layer

3.1 Designation
The complete designation shall be specified as follows in the given order:
Example Hose MAN 333 - N1 W - 32
Designation
Standard number
Hose type
Code letter for versions with wire coil
(only specify if the version with wire coil
is expressly desired!)
Nominal diameter according to Table 1

3.2 Hose dimensions

Table 1 Dimensions, tolerances, pressures

Min.
Permissi-
Smallest permissi- Test burst-
DN ble oper-
d1 d2 s1 ble bending radius pres- ing
(NW) ating
r min sure pres-
pressure
sure
Perm. Perm. without with wire
toler- toler- 2 bar bar bar
wire coil coil 4
ance ance

5 6 12 40
6 8 14 +0,8 3 0,4 25 40 75
50
8 9 15 -0,6

10 11 18 3,5 0,6 70
18 27 54
12 (13) 13 22 90
±0,5
15 3 15 24 ---
4,5 110 14 21 42
16 16 25 110
±1 1,0
18 1 18 27 120 ---
12 18 36
20 20 30 130
5
22 1 22 32 140 10 15 30
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MAN 333 : 2024-07

Min.
Permissi-
Smallest permissi- Test burst-
DN ble oper-
d1 d2 s1 ble bending radius pres- ing
(NW) ating
r min sure pres-
pressure
sure
Perm. Perm. without with wire
toler- toler- 2 bar bar bar
wire coil coil 4
ance ance
25 25 35,5 150 10 15 30
28 1 28 38,5 5,25 170 ---
8 12 24
32 32 ±0,5 42,5 ±1 180
35 1 35 46 5,5 200
1,0 6 10 20
40 40 51,5 240 210
5,75
50 50 61,5 300 230
60 +0,5
60 72 ±1,2 350 250 4,5 7 14
-0,6 6
70 1 70 82 500 275
1 These nominal diameters are not included in DIN EN ISO 6708 and shall be avoided in new designs.
2 Maximum permissible wall thickness difference in the vertical cross section.
3 For return lines DN 15, wall thickness 3,5 mm is permissible as an alternative.
4 The version with wire coil is only required for multi-purpose hoses as from nominal diameter 32 which are used in suction lines (i.e. with
an operating vacuum of up to 0,06 bar).

For multi-purpose hoses in hose pipes supplied by the manufacturer in ready-assembled condition, the following
additional (deviating) requirements apply:
- As from nominal diameter 12, the versions with or without wire coil are permissible as alternatives
- Where the requirements according to Section 3 of this standard are fulfilled, internal and external diameters or
wall thicknesses are permissible that deviate from the specifications in Table 1 by a maximum of 20% for d1, d2
and a maximum of 30% for s1.
- Permissible length deviation ±2%

4 Requirements

4.1 Requirements for the material properties of the internal and external layer
Internal layer according to MAN 302 – NBR 5-70, external layer according to MAN 304 – CR 7-70

4.2 Requirements for the textile liners

The material of the textile liners is at the manufacturer's discretion.
The type of textile liner is agreed in connection with the material and development release (e.g. fibre type, yarn
type, weave structure, structure of the braiding or knitted fabric) and is to be stated in the initial sample inspec-
tion report within the framework of the initial sample release according to CVS10.

4.3 Requirements for the hose

The hoses shall comply with the requirements according to Table 2.
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MAN 333 : 2024-07

Table 2 Test conditions, requirements

Test type Test to Requirements

True to dimension in accordance with MAN 333,

Dimension test DIN EN ISO 4671
Table 1
DIN EN ISO 10619-1, Flattening in the area of the bending zone by
Bending test
Method B a maximum of 10% of the external diameter

Leak-tight at test pressure in accordance with

MAN 333, Table 1, Permissible change in length at
static operating pressure of +2% to -4%; for hoses
Static pressure test DIN EN ISO 1402 with wire coil +10%
Leak-tight up to bursting pressure values in acc.
with MAN 333, Table 1
Wear behaviour of the with 2000 cycles and a test force of (25 ±5) N:
M 3717
outer layer Weight loss max. 1 g
e.g. for Type 2
Internal layer insert: up to DN 8 min. 1,5 N/mm
Separation resistance in DIN EN ISO 8033,
above DN 8 min. 2,5 N/mm
N/mm in delivery condition test type according to table
External layer liner: up to DN 8 min. 2,0 N/mm
above DN 8 min. 2,5 N/mm
Separation resistance after
ageing (based on ISO 188)
DIN EN ISO 8033,
Fill sample, sealed on one At least 60% of the separating force of the delivery
test type according
side, with oil IRM 902 condition
to delivery condition
and age for 168 h at
(70 ± 1)°C.
Crack formation level 0
DIN EN ISO 10619-2,
Cold behaviour at -40°C Leak-tight at test pressure in acc. with MAN 333,
Method B
Table 1
Duration = 72 h at temperature = (40 ± 2)°C,
Ozone resistance DIN EN ISO 7326,
ozone concentration = (50 ± 5 ) pphm;
of the external layer Method 4
crack formation level 0 (crack-free)

General conditions Internal and external surfaces not sticky, smooth

Viewed with normally
and free from cracks, bubbles and separation
Appearance sighted eye
of the intermediate layers

4.4 Requirements for the wire coil

Material and version (e.g. thickness of wire) of the wire coil at the manufacturer's discretion.
They are agreed in connection with the material and development release and are to be stated in initial sample
inspection report within the framework of the initial sample release according to CVS10.
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5 Item labelling
Item labelling of the hoses shall take place in accordance with MAN 312-1.
Hoses shall be marked continuously and permanently with the details in accordance with Section 4.4, Table 1 of
MAN 312-1 and additionally with the following information:
- Number of this MAN company standard “MAN 333”
- Hose type: N1 (without wire coil) or N1W (with wire coil)
- Nominal diameter in accordance with Table 1, e.g. 32
Spacing between the marking blocks is permitted. The marking block shall be present at least once on hose
assemblies.

6 Storage

6.1 Storage conditions

The guidelines in DIN EN ISO 8331 apply for the correct storage of hoses according to this standard.

6.2 Permissible storage periods

The maximum permissible storage times for hoses according to this standard are specified in VG 95924-2.
The hoses shall fully comply with the requirements according to Table 2 of this standard following the storage
periods laid down in VG 95924‑2.

Applicable documents
In MAN company standards, industry-wide standards are normally cited as national standards.
Nationally adopted international standards (e.g. DIN ISO, DIN EN ISO) are also available as international
editions (e.g. ISO) if other languages are required.
Nationally adopted European standards (e.g. DIN EN) can also be obtained as other nationally adopted versions
(e.g. BS EN, SS-EN) if required.
CVS10 TRATON customer requirements; Quality assurance agreement for purchased parts
& organisations
DIN EN 14214 Liquid petroleum products - Fatty acid methyl esters (FAME) for use in diesel engines
and heating applications - Requirements and test methods
DIN EN ISO 1402 Rubber and plastics hoses and hose assemblies - Hydrostatic testing
DIN EN ISO 4671 Rubber and plastics hoses and hose assemblies - Methods of measurement of the
dimensions of hoses and the lengths of hose assemblies
DIN EN ISO 6708 Pipework components - Definition and selection of DN (nominal size)
DIN EN ISO 7326 Rubber and plastics hoses - Assessment of ozone resistance under static conditions
DIN EN ISO 8033 Rubber and plastics hoses - Determination of adhesion between components
DIN EN ISO 8331 Rubber and plastic hoses and hose assemblies - Guidelines for selection, storage,
use and maintenance
DIN EN ISO 10619-1 Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness -
Part 1: Bending tests at ambient temperature
DIN EN ISO 10619-2 Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness -
Part 2: Bending tests at sub-ambient temperatures
ISO 188 Rubber, vulcanized or thermoplastic – Accelerated ageing and heat resistance tests
M 3717 Hydraulic hoses with reinforcement; determination of material loss (abrasion) of the
outer layer
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MAN 239 General Terms of Delivery for Purchased Parts

MAN 302 Elastomer base NBR; material delivery conditions
MAN 304 Elastomer base CR; material delivery conditions
MAN 312-1 Item labelling; requirements and execution
VG 95924-2 Hoses and hose assemblies – Part 2: For fluid systems, fuels, coolants and air - age
monitoring and preventive maintenance

Previous issues: M6.271-27/1976-04

MAN 333/1978-03, 1978-06, 1979-03, 1980-01, 1981-04, 1983-09, 1984-06, 1985-08,
1989-02, 2002-11, 2014-07

Changes: Compared to issue 2014-07 the following changes have been made:
- Section 3.1: Designation example revised
- Sections 4.2 and 4.4: Reference to MAN 239-2 deleted, replaced with reference
to CVS10
- Section 4.3, Table 2, test type for wear behaviour: DIN EN ISO 6945 replaced
by M 3717 with regard to wear behaviour, test force and number of cycles also
defined
- Section 4.3, Table 2, test type for separation resistance after ageing: reference
to DIN 53508 deleted, replaced with reference to ISO 188 including ageing
conditions
- Section for release conditions: updated and moved to Section 2
- Section 5, item labelling: adapted according to the requirements of MAN 312-1
- Section 6.1: Reference to DIN 7716 deleted, replaced with reference to
DIN EN ISO 8331
- “Applicable documents” section: Information text on international standards
added
- Editorial revisions