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DRAFT UGANDA STANDARD
DUS 2159-1
First Edition 2019-mm-dd
Reference number DUS nnnn-n: yyyy
© UNBS yyyy
Hydraulic Fluid — Performance Classifications — Part 1: General
DUS 2159-1: 2019
ii © UNBS 2019 – All rights reserved
Compliance with this standard does not, of itself confer immunity from legal obligations
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are responsible for its correct application
© UNBS yyyy
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written permission from UNBS.
Requests for permission to reproduce this document should be addressed to
The Executive Director Uganda National Bureau of Standards P.O. Box 6329 Kampala Uganda Tel: +256 414 333 250/1/2/3 Fax: +256 414 286 123 E-mail: [email protected] Web: www.unbs.go.ug
DUS 2159-1:2019
© UNBS 2019 – All rights reserved iii
Contents Page
Foreword ............................................................................................................................................................ iv
1 Scope ...................................................................................................................................................... 1
2 Normative references ............................................................................................................................ 1
3 Terms and definitions ........................................................................................................................... 1
4 Base Oil .................................................................................................................................................. 2 4.1 Group I .................................................................................................................................................... 2 4.2 Group II ................................................................................................................................................... 2 4.3 Group III .................................................................................................................................................. 2 4.4 Group IV ................................................................................................................................................. 2 4.5 Group V .................................................................................................................................................. 2
5 General classification ........................................................................................................................... 2 5.1 Viscosity ................................................................................................................................................. 2 5.2 Performance ........................................................................................................................................... 2
Bibliography ........................................................................................................................................................ 5
.
DUS 2159-1: 2019
iv © UNBS 2019 – All rights reserved
Foreword
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and Cooperatives established under Cap 327, of the Laws of Uganda, as amended. UNBS is mandated to co-ordinate the elaboration of standards and is
(a) a member of International Organisation for Standardisation (ISO) and
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and
(c) the National Enquiry Point on TBT Agreement of the World Trade Organisation (WTO).
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical Committee is established to deliberate on standards in a given field or area and consists of key stakeholders including government, academia, consumer groups, private sector and other interested parties.
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the general public for comments. The committee reviews the comments before recommending the draft standards for approval and declaration as Uganda Standards by the National Standards Council.
The committee responsible for this document is Technical Committee UNBS/TC 16, Petroleum, Subcommittee SC 1, Petroleum and Petrochemical.
DUS 2159 consists of the following parts, under the general title Hydraulic Lubricating Fluid — Performance Classifications:
Part 1: General
Part 2: Specifications for categories HH, HL, HM, HV and HG
Part 3: Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU
Part 4: Specifications for hydraulic fluids in categories HETG, HEPG, HEES and HEPR
DUS 2159-1:2019
© UNBS 2019 – All rights reserved v
Introduction
The choice of suitable hydraulic fluids is critical for the lifetime, operational safety and efficiency of hydrostatic components and gears.
The selection of the appropriate hydraulic fluid for a specific application can be made only when the different features of the lubricants and the task and conditions under which the machine is to operate are taken into consideration.
This draft standard outlines the current performance classifications as applicable to ISO classification. Current hydraulic oil categories that may be deemed obsolete by the ISO classification system during the course of the application of this standard shall be considered obsolete as well.
DRAFT UGANDA STANDARD DUS 2159-1: 2019
© UNBS yyyy – All rights reserved 1
Hydraulic fluid — Performance Classifications — Part 1: General
1 Scope
This Draft Uganda Standard covers classification of hydraulic fluids used in hydraulic systems.
This classification system does not include automotive brake fluids or aircraft hydraulic fluids
NOTE The consumer should refer to the owner’s or operator’s manual for recommended category of hydraulic fluids
to be used in a specific hydraulic systems.
This specification defines only new hydraulic fluids before they are installed in the hydraulic system.
This specification defines specific types of hydraulic fluids. It does not include all hydraulic fluids. Some oils that are not included may be satisfactory for certain hydraulic applications.
2 Normative references
The following referenced documents 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.
ISO 3448, Industrial liquid lubricants — ISO viscosity classification
DUS 2159-2:2019 Hydraulic lubricating fluid — Performance Classifications — Part 2 Specifications for categories HH, HL, HM, HV and HGISO 12922, Lubricants, industrial oils and related products (class L) — Family H (Hydraulic systems) —
DUS 2159-3:2019 Hydraulic lubricating fluid — Performance Classifications — Part 3 Specifications for hydraulic fluids in categories HFAE, HFAS, HFB, HFC, HFDR and HFDU
DUS 2159-4:2019 Hydraulic lubricating fluid — Performance Classifications — Part 4 Specifications for categories HETG, HEPG, HEES and HEPR
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
DUS 2159-1: 2019
2 © UNBS yyyy – All rights reserved
4 Base Oil
Fully formulated hydraulic fluids shall consist of a blend of a base fluid and an additive package. These base fluids shall be categorized into five groups types; API groups I, II, III, IV and V
4.1 Group I
Group I base oils classified as being less than 90 percent saturates, greater than 0.03 percent sulfur and with a viscosity-index range of 80 to 120.
4.2 Group II
Group II base oils classified as being more than 90 percent saturates less than 0.03 percent sulfur and with a viscosity index of 80 to 120.
4.3 Group III
Group III base oils classified as being greater than 90 percent saturates, less than 0.03 percent sulfur and have a viscosity index above 120..
4.4 Group IV
Group IV base oils classified as polyalphaolefins (PAOs). These synthetic base oils are made through a process called synthesizing.
4.5 Group V
Group V base oils classified as all other base oils, including silicone, phosphate ester, polyalkylene glycol (PAG), polyolester, biolubes, etc. These base oils are at times mixed with other base stocks to enhance the oil’s properties.
5 General classification
Hydraulic fluid shall be classified according to viscosity grade and performance.
5.1 Viscosity
The viscosity of the hydraulic fluid shall be classified basing on the ISO viscosity classification, as per designations indicated in DUS ISO 3448.
5.2 Performance
Hydraulic fluid shall be classified according to performance based on the classification as indicated in the table below.
DUS 2159-1: 2019
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Table 1 — Classification of hydraulic fluids
Code
letter
General
applications
Particular
applications
More specific
applications
Composition and
properties
Symbol
ISO-L
Typical
applications
Remarks
International
Standard
H Hydraulic
Systems Hydrostatic Non-inhibited
refined mineral
oils
HH
DUS 2159-
2:2019
Refined
mineral oils with improved
anti- rust and anti-oxidation
properties
HL
Oils of HL type with improved
anti-wear
properties
HM
General
hydraulic systems
which include highly loaded
compo- nents
Oils of HM type with
improved viscosity/
temperature
proper- ties
HV
Construction and marine
equipment
Applications where
environmen- tally
acceptable
fluids
are requested
Triglycerides HETG General hydraulic
systems
DUS 2159-
4:2019
Polyglycols HEPG
Synthetic
esters
HEES
Polyalphaolefin
and other synthetic
hydro- carbons
HEPR
Hydraulic slideway
systems
Oils of HM
type with anti-
stick/slip
properties
HG
Machines with
combined hydraulic and
plain bearing way
lubrication systems
where vibration or
intermittent sliding (stick/
slip) at low speed is to be
minimised
These fluids are
intended
to be
multi-func-
tional but they do
not function
success- fully
under all hydrau-
lic applica-
tions
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2:2019
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4 © UNBS yyyy – All rights reserved
Applications
where
fire-resistant
fluids
are required
Oil in water
emulsions
HFAE
Typically
more than 95
% mass fraction
of water.
DUS 2159-
3:2019
Chemical solutions in
water
HFAS
Typically
more than 95
% mass fraction
of water.
Water in oil
emulsions
HFB
Typically more
than 40 % mass
fraction
of water.
Water polymer
solutions
HFC
Typically more
than 35 % mass
fraction
of water.
Synthetic fluids
containing no water and
consisting phosphate
esters
HFDR
Synthetic fluids
containing no water and of
other
composition
HFDU
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Bibliography
[1] ISO 6743-99, Lubricants, industrial oils and related products (class L) — Classification —
Part 99: General
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Certification marking
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards (UNBS) Certification Mark shown in the figure below.
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made thereunder. This mark can be used only by those licensed under the certification mark scheme operated by the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The presence of this mark on a product or in relation to a product is an assurance that the goods comply with the requirements of that standard under a system of supervision, control and testing in accordance with the certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are continually checked by UNBS for conformity to that standard.
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda National Bureau of Standards.
DUS 2159-1: 2019
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