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Issued by
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Level / Type
National · Mandatory
Issue date
December 5, 2011
Implementation date
June 1, 2012
Scope
GB 11120-2011 (Lubricating oils for turbines) is available as an English-translated PDF.
GB 11120-2011 — This standard specifies the product variety and marking, requirements and test methods, inspection rules turbine oils, marking, packaging, transportation and storage. This standard applies to refined mineral oil or synthetic oil-based raw materials, adding antioxidants, corrosion inhibitors and anti-wear additives, etc. Made in the power plant turbine lubrication and control systems, including steam turbine, turbine, gas turbine and having a common lubrication system - Turbine oil steam turbine combined cycle use. Also suitable for other industrial purposes or ship turbine drive lubricating system Turbine oils used. This standard does not apply to fire-resistant turbine oils and turbine oils have special requirements.
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Document preview — GB 11120-2011
National Standard of the People's Republic of China
- ICS
- 75.100
- Classification
- E 34
- Replacing
- GB 11120-1989
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 product variety and mark
- 3.1 product variety
- 3.2 Product marking
- 4 requirements and test methods
- 4.1 General Requirements
- 4.2 Technical Requirements
- 5 Inspection Rules
- 5.1 Inspection Classification and test items
- 5.2 Batch
- 5.3 Sampling
- 5.4 determine the rules
- 5.5 reinspection rules
- 6 signs, packaging, transportation and storage
- 168 ± 2 1000 ± 2
Foreword
The standard 3.2 and Chapter 4 are mandatory, the rest are recommended.
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB 11120-1989 "L-TSA turbine oil."
This standard compared with GB 11120-1989 main changes are as follows.
--- Increasing the L-TSE, L-TGA, L-TGE, L-TGSB and L-TGSE varieties;
--- Increased compatibility with rubber index and its assessment (see Appendix A);
--- Increasing the product classification and labeling (see Chapter 3);
--- Increased inspection rules chapter (see Chapter 5);
--- L-TSA main technical differences between classes and GB 11120-1989 See Appendix B.
The standard reference method using redrafted ISO 8068.2006 "Lubricants, industrial oils and related products (L class) - turbine
(T group) - turbine lubricant specifications "(in English) establishment, and ISO 8068.2006 is equivalent to the degree of non-uniformity.
This standard by the National Standardization Technical Committee of petroleum products lubricants oil and lubricants and fuels Technical Committee (SAC /
TC280/SC1) centralized.
This standard was drafted. China Research Institute of Petroleum Corp. Petrochemical, China National Petroleum Corp.
Oil company, oil company China Petroleum & Chemical Corporation, Xi'an Thermal Power Research Institute Co., Ltd.
Drafters of this standard. dragon Li, Meng Yuchan, Wang Hui, Yi Mei Rong, Li Xinhua.
This standard was first published in 1989, this is the first revision.
Turbine oil
Warning. If you do not observe proper precautions, this product may be hazardous to your standard in the production, storage and use of the process.
This standard is not intended to present all of the safety issues related to the product recommendations. Before using this standard has the responsibility to establish appropriate safety
Full and preventive measures, and determine the applicability of regulatory limitations related.
1 Scope
This standard specifies the product variety and marking, requirements and test methods, inspection rules turbine oils, marking, packaging, transportation and storage.
This standard applies to refined mineral oil or synthetic oil-based raw materials, adding antioxidants, corrosion inhibitors and anti-wear additives, etc.
Made in the power plant turbine lubrication and control systems, including steam turbine, turbine, gas turbine and having a common lubrication system -
Turbine oil steam turbine combined cycle use. Also suitable for other industrial purposes or ship turbine drive lubricating system
Turbine oils used.
This standard does not apply to fire-resistant turbine oils and turbine oils have special requirements.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 261 Flash Point by Pensky - Martens closed cup method
GB/T 265 Petroleum products - Determination of kinematic viscosity and calculation of dynamic viscosity
GB/T 1884 crude oil and liquid petroleum products - Laboratory determination of density (density meter method)
GB/T 1885 Petroleum Measurement Tables
GB/T 1995 Petroleum products - Calculation of viscosity index
GB/T 2541 Petroleum products viscosity index Sheets
GB/T 3141 Industrial liquid lubricants - ISO viscosity classification
GB/T 3535 Petroleum products - Determination of pour point
GB/T 3536 Petroleum products - Determination of flash point and ignition point Cleveland open cup method
GB/T 4756 petroleum liquids hand sampling method
GB/T 4945 Petroleum products and lubricants - Determination of acid and base number (Color Indicator Method)
GB/T 5096 petroleum products copper corrosion test
GB/T 6540 Petroleum products - Determination of color
GB/T 7304 Petroleum products and lubricants - Determination of acid (potentiometric titration)
GB/T 7305 water separability of petroleum oils and synthetic liquid assay
GB/T 7600 in transformer oil and turbine oil Determination of water content (coulometry)
GB/T 11133 Liquid petroleum products - Determination of water (Karl Fischer method)
GB/T 11143 inhibited mineral oil in the presence of water rust resistance test method
GB/T 12579 Determination of foaming characteristics lubricants
Determination of oxidation characteristics GB/T 12581 Inhibited mineral oils
GB/T 14039 Hydraulic fluid level of contamination by solid particles
GB/T 14832 standard elastomeric material and hydraulic fluid compatibility test
GB/T 18854 Hydraulic fluid automatic particle counter calibration
GB/T 19936.1 gear FZG test procedures - Part 1. FZG scuffing load capacity relative to oil Test Method
A/8.3/90
GJB563 light aviation lubricants corrosion and oxidation stability assays (metal sheet method)
DL/T 432 Power in oil particle pollution measurement methods
SH/T 0163 Petroleum products - Determination of total acid (Semi-micro color indicator titration)
SH0164 petroleum product packaging, storage and delivery acceptance rules
SH/T 0193 Determination of oxidation stability of lubricants
SH/T 0207 insulating water content determination (Karl Fischer method)
SH/T 0306 Determination of carrying capacity lubricant (CL-100 Gear machine method)
SH/T 0308 Determination of lubricating air release value
Sludge trend SH/T 0565 Inhibited mineral oil assay
SH/T 0604 crude oil and petroleum products densitometry (U-tube vibration method)
SH/T 0805 lube filtration assays
ASTMD4636 hydraulic oil, aviation turbine engine lubricants and other refined lubricating oil corrosion and oxidation stability assays
(Standardtestmethodforcorrosivenessandoxidationstabilityofhydraulicoils, aircraftturbine
enginelubricants, andotherhighlyrefinedoils)
3 product variety and mark
3.1 product variety
3.1.1 L-TSA and L-TSE turbine oil
L-TSA as a refined mineral oil turbine oil containing a suitable antioxidant and corrosion inhibitors; L-TSE for gear lubrication system
While representing an increase of L-TSA turbine oil extreme pressure requirements. Suitable for steam turbine.
3.1.2 L-TGA and L-TGE Gas Turbine oil
L-TGA is refined mineral oil-based turbine oil containing appropriate antioxidants and corrosion inhibitors; L-TGE is lubricated gear train
L-TGA system while representing an increase of extreme pressure turbine oil requirements. It applies to gas turbines.
3.1.3 L-TGSB and L-TGSE fuel/oil turbine
L-TGSB of refined mineral oil-based fuel containing a suitable antioxidant and corrosion inhibitor/turbine oil, compared with L-TSA and L-TGA increase
Plus the high temperature oxidation stability and thermal stability. L-TGSE having extreme pressure requirements for high temperature oxidation stability and high thermal stability
Qualitative fuel/turbine oil. Mainly applicable to common lubricating system of gas - steam combined cycle turbine. Also available separately for steam turbine
Or gas turbines.
3.2 Product marking
Turbine oil products labeled as. viscosity grade product variety Code Name Standard No.
Example. L-TSA32 turbine oil (A grade) GB 11120;
L-TGA32 turbine oil GB 11120;
L-TGSB32 fuel/oil turbine GB 11120.
4 requirements and test methods
4.1 General Requirements
At room temperature under visible appearance should be clear and transparent delivery of oil, does not contain any visible particulate matter.
Turbine oils contain viscosity index improvers.
4.2 Technical Requirements
Turbine oils technical requirements and test methods are shown in Table 1 to Table 3. Turbine oil and rubber sealing material compatibility compatibility index table
Shown, assessment methods and acceptable limits in accordance with Appendix A of.
Table 1 L-TSA turbine oil and L-TSE technical requirements
project
Viscosity grade (GB/T 3141)
Quality Index
A Grade B Grade
324,668,324,668,100
experiment method
Visual Appearance Transparent Transparent
Chroma/No Report GB/T 6540
Kinematic viscosity (40 °C)/(mm2/s)
28.8 ~
35.2
41.4 ~
50.6
61.2 ~
74.8
28.8 ~
35.2
41.4 ~
50.6
61.2 ~
74.8
90.0 ~
110.0
GB/T 265
Viscosity index of not less than 90 85 GB/T 1995a
Pour point b/°C no higher than -6 -6 GB/T 3535
Density (20 °C) / (kg/m3) Report
GB/T 1884 and
GB/T 1885c
Flash point (open)/°C no less than 186 195 186 195 GB/T 3536
Acid value (in dollars KOH)/(mg/g) is not greater than 0.2 0.2 GB/T 4945d
Moisture (mass fraction) /% <= 0.02 0.02 GB/T 11133e
Foaming (foam orientation/foam stability) f/(mL/mL)
no greater than
Program I (24 °C)
Program II (93.5 °C)
Program III (after 24 °C)
GB/T 12579
Air release value (50 °C)/min is not more than 5 6 5 6 8 - SH/T 0308
Copper Corrosion (100 °C, 3h)/level not greater than 1 1 GB/T 5096
Liquid rust (24h) no rust no rust
GB/T 11143
(B method)
Anti-emulsion (emulsion reached 3mL time)/min
no greater than
54 °C
82 °C
GB/T 7305
Rotating bomb g/min Report SH/T 0193
Table 1 (continued)
project
Viscosity grade (GB/T 3141)
Quality Index
A Grade B Grade
324,668,324,668,100
experiment method
Oxidation Stability
1000h after total acid number (in dollars KOH)/(mg/g)
no greater than
When the total acid value of 2.0 (in dollars KOH)/(mg/g) of
Room/h is not less than
Sludge/mg 1000h after no more than
0.3
0.3
0.3
report
report
report
report
report
report
GB/T 12581
GB/T 12581
SH/T 0565
Carrying capacity h
Gear machine test/fail grade of not less than
8 9 10 - GB/T 19936.1
Filtration
Dry /% not less than
Wet
by
report
report
SH/T 0805
Cleanliness i/level not greater than -/18/15 Report of GB/T 14039
Note. L-TSA class points A and B grades, class B does not apply to class L-TSE.
a measuring method also includes GB/T 2541, disputed results in GB/T 1995 for the arbitration method.
b can negotiate with suppliers lower temperatures.
c assay method also includes SH/T 0604.
d measurement method also includes the GB/T 7304 and SH/T 0163, disputed results in GB/T 4945 for the arbitration method.
e measurement method also includes the GB/T 7600 and SH/T 0207, results of dispute, GB/T 11133 for the arbitration method.
f procedures for program I and III, foam stability in the 300s when recording for a program II, recorded at the time of 60s.
g The value for use in monitoring the oil is useful. Less than 250min is not normal.
h only for TSE. The method also includes the determination of SH/T 0306, disputed results in GB/T 19936.1 arbitration method.
i according to GB/T 18854 automatic particle counter calibration. (Recommended DL/T 432 method of calculation and measurement of particles).
Table 2 L-TGA and L-TGE technical requirements of gas turbine oils
project
Viscosity grade (GB/T 3141)
Quality Index
L-TGA L-TGE
324668324668
experiment method
Visual Appearance Transparent Transparent
Chroma/No Report GB/T 6540
Kinematic viscosity (40 °C)/(mm2/s)
28.8
~ 35.2
41.4
~ 50.6
61.2
~ 74.8
28.8
~ 35.2
41.4
~ 50.6
61.2
~ 74.8
GB/T 265
Viscosity index of not less than 90 90 GB/T 1995a
Pour point b/°C no higher than -6 -6 GB/T 3535
Density (20 °C) / (kg/m3) Report
GB/T 1884 and
GB/T 1885c
TABLE 2 (cont.)
project
Viscosity grade (GB/T 3141)
Quality Index
L-TGA L-TGE
324668324668
experiment method
Flash point/°C no less than
Opening
Closed
GB/T 3536
GB/T 261
Acid value (in dollars KOH)/(mg/g) is not greater than 0.2 0.2 GB/T 4945d
Moisture (mass fraction) /% <= 0.02 0.02 GB/T 11133e
Foaming (foam orientation/foam stability) f/(mL/mL) is not greater than
Program I (24 °C)
Program II (93.5 °C)
Program III (after 24 °C)
GB/T 12579
Air release value (50 °C)/min is not more than 5 6 5 6 SH/T 0308
Copper Corrosion (100 °C, 3h)/level not greater than 1 1 GB/T 5096
Liquid rust (24h) no rust no rust
GB/T 11143
(B method)
Rotating bomb g/min Report SH/T 0193
Oxidation Stability
1000h after total acid number (in dollars KOH)/(mg/g) is not greater than
Total acid value of 2.0 (in dollars KOH)/(mg/g) Time/h
not less than
Sludge/mg 1000h after no more than
0.3
0.3
0.3
0.3
0.3
0.3
GB/T 12581
GB/T 12581
SH/T 0565
Carrying capacity
Gear machine test/fail grade of not less than
- 8 9 10 GB/T 19936.1h
Filtration
Dry /% not less than
Wet
by
by
SH/T 0805
Cleanliness i is not greater than -/17/14 -/17/14 GB/T 14039
a measuring method also includes GB/T 2541, disputed results in GB/T 1995 for the arbitration method.
b can negotiate with suppliers lower temperatures.
c assay method also includes SH/T 0604.
d measurement method also includes the GB/T 7304 and SH/T 0163, disputed results in GB/T 4945 for the arbitration method.
e measurement method also includes the GB/T 7600 and SH/T 0207, results of dispute, GB/T 11133 for the arbitration method.
f procedures for program I and III, foam stability in the 300s when recording for a program II, recorded at the time of 60s.
g The value for use in monitoring the oil is useful. Less than 250min is not normal.
h measuring method also includes SH/T 0306, disputed results in GB/T 19936.1 arbitration method.
i according to GB/T 18854 automatic particle counter calibration. (Recommended DL/T 432 method of calculation and measurement of particles).
Table 3 L-TGSB and L-TGSE fuel/oil turbine technical requirements
project
Viscosity grade (GB/T 3141)
Quality Index
L-TGSB L-TGSE
324668324668
experiment method
Visual Appearance Transparent Transparent
Chroma/No Report GB/T 6540
Kinematic viscosity (40 °C)/(mm2/s)
28.8 ~
35.2
41.4 ~
50.6
61.2 ~
74.8
28.8 ~
35.2
41.4 ~
50.6
61.2 ~
74.8
GB/T 265
Viscosity index of not less than 90 90 GB/T 1995a
Pour point b/°C no higher than -6 -6 GB/T 3535
Density (20 °C) / (kg/m3) Report
GB/T 1884 and
GB/T 1885c
Flash point/°C no less than
Opening
Closed
GB/T 3536
GB/T 261
Acid value (in dollars KOH)/(mg/g) is not greater than 0.2 0.2 GB/T 4945d
Moisture (mass fraction) /% <= 0.02 0.02 GB/T 11133e
Foaming (foam orientation/foam stability) f/(mL/mL)
no greater than
Program I (24 °C)
Program II (93.5 °C)
Program III (after 24 °C)
GB/T 12579
Air release value (50 °C)/min is not more than 5 5 6 5 5 6 SH/T 0308
Copper corrosion (3h, 100 °C)/level not greater than 1 1 GB/T 5096
Liquid rust (24h) no rust no rust
GB/T 11143
(B method)
Anti-emulsion (54 °C, emulsion time to reach 3mL)/min
Not more than 30 30 GB
/ T 7305
Rotating bomb/min is not less than 750 750 SH/T 0193
Improved rotating bomb g /% not less than 85 85 SH/T 0193
Oxidation Stability
Total acid value of 2.0 (in dollars KOH)/(mg/g) Time/h
Not less than 3500 3000 2500 3500 3000 2500 GB/T 12581
High temperature oxidation stability (175 °C, 72h)
Viscosity changes /%
Change in acid value (in dollars KOH)/(mg/g)
Metal weight change/(mg/cm2)
report
report
± 0.250
± 0.250
± 0.250
± 0.250
± 0.250
report
report
± 0.250
± 0.250
± 0.250
± 0.250
± 0.250
ASTMD4636h
Table 3 (Continued)
project
Viscosity grade (GB/T 3141)
Quality Index
L-TGSB L-TGSE
324668324668
experiment method
Carrying capacity
Gear machine test/fail grade of not less than
- 8 9 10 GB/T 19936.1i
Filtration
Dry /% not less than
Wet
by
by
SH/T 0805
Cleanliness j is not greater than -/17/14 -/17/14 GB/T 14039
a measuring method also includes GB/T 2541, disputed results in GB/T 1995 for the arbitration method.
b can negotiate with suppliers lower temperatures.
c assay method also includes SH/T 0604.
d measurement method also includes the GB/T 7304 and SH/T 0163, disputed results in GB/T 4945 for the arbitration method.
e measurement method also includes the GB/T 7600 and SH/T 0207, results of dispute, GB/T 11133 for the arbitration method.
f procedures for program I and III, foam stability in the 300s when recording for a program II, recorded at the time of 60s.
g 300mL oil sample taken at 121 °C, with 3L/h speed through into a clean, dry nitrogen, after 48h, according to SH/T 0193 test,
Results obtained with the percentage of the sample results obtained with untreated ratio of representation.
h measuring method also includes GJB563, results of dispute, ASTMD4636 arbitration method.
i measuring method also includes SH/T 0306, disputed results in GB/T 19936.1 arbitration method.
j according to GB/T 18854 automatic particle counter calibration. (Recommended DL/T 432 method of calculation and measurement of particles).
5 Inspection Rules
5.1 Inspection Classification and test items
5.1.1 factory inspection
Batches of the factory inspection items include. appearance, color, kinematic viscosity, viscosity index, density, flash point, acid value, water, foam, air release
Values, anti-emulsification, copper corrosion, liquid rust, rotating bomb and cleanliness.
In raw materials, production process is not likely to affect the quality of the product changes, the factory periodic inspection items include. filtration, carrying capacity
Strength and high-temperature oxidation stability was measured at least once a year.
5.1.2 Type inspection
Type test items specified in 4.2 for all test items.
Type tested under the following conditions.
a) production of new products or appraisement time;
b) raw materials, production processes and other large changes that may affect product quality time;
c) the factory inspection results are quite different and the last type test results.
5.2 Batch
In the raw materials and the production process under the same conditions, each producing a pot or kettle batch.
5.3 Sampling
According to GB/T 4756 were, taken as a test sample 3L and retention samples.
5.4 determine the rules
Factory inspection and type test results all in compliance with the technical requirements of Chapter 4, it is determined that batch of qualified products.
5.5 reinspection rules
Such as factory inspection and type test results do not meet the technical requirements set out in Chapter 4 when, according to the provisions of GB/T 4756 from the same batch of products
Double the amount of re-extract samples of the failed project reinspection, the reinspection results as not meet the technical requirements, then determine whether the product is not
qualified.
6 signs, packaging, transportation and storage
Signs, packaging, transportation, storage and delivery acceptance SH0164 performed.
Appendix A
(Normative)
Rubber compatibility index
Turbine oil rubber compatibility index, type of rubber depending on conditions of oil may come into contact listed in Table A.1, using GB/T 14832
The method of measurement for rubber negotiated by the user and turbine oil supply side. Table A.2 gives acceptable performance indicators of change instructive.
Also by the end user depending on the purpose and the actual use of other conditions specified limits. In addition, turbine oils and lubrication systems should all
Constituent material compatibility.
Table A.1 rubber compatibility test conditions index according to GB/T 14832 Determination
Variety codes apply liquid rubber test temperature/°C test cycle a/h
mineral oil
TSA, TGA
TSE, TGE
TGSB
TGSE
NBR1,2 (nitrile rubber) 100 ± 1
HNBR1 (hydrogenated nitrile rubber) 130 ± 1
FKM2 (FKM) 150 ± 1
168 ± 2 1000 ± 2
a long period using a liquid rubber will change, the proposed assessment 1000h rubber compatibility.
Table A.2 in accordance with GB/T 14832 method of assessment, acceptable performance range
Immersion time/h
Maximum volume expansion
/%
The maximum volume shrinkage
/%
Hardness change
/ IRHD
Maximum tensile strength
The rate of change /%
The maximum elongation at break
The rate of change /%
168 15 4 ± 8 -20 -20
1000 20 5 ± 10 -50 -50
Appendix B
(Informative)
Compared with GB 11120-1989 major changes in this standard TSA varieties
This standard TSA varieties major changes compared with the GB 11120-1989 Table B.1.
Compared with GB 11120-1989 Table B.1 major changes in this standard TSA varieties
The project GB 11120-1989 standard TSA varieties
Quality rating excellent grade, first grade and qualified for points A and B grade
32,46,68,100 viscosity grade
A Grade. 32,46,68
Grade B. 32,46,68,100
Viscosity Index
Indicators 90, footnote. 1) of intermediate base crude oil production
Turbine oil, L-TSA qualified products do not allow low viscosity index
At 70; a viscosity index products allow not less than 80. root
According to the actual production and use, in consultation with the user, can not be
The standard limit.
A Grade. 90
Grade B. 85
Flash point
Opening. 180,180,195,195
Closed. -
A Grade. opening 186,186,195
Class B. opening 186,186,195,195
Acid value
Excellent grade, first grade. report
Qualified. 0.3
0.2
No moisture 0.02
Foaming
Excellent grade, first grade. 450/0,100/0,450/0
Qualified. 600/0,100/0,600/0
A Grade. 450/0,50/0,450/0
Level B. 450/0,100/0,450/0
Air release value
Excellent grade, first grade. 5,6,8,10
Footnotes. air release of a product based on the production and value
Practical, in consultation with the user, this standard can not be restricted.
Qualified. -
A Grade. 5,5,6
Grade B. 5,6,8, -
Rotating bomb - report
Filterability (dry) -
A Grade. 85
Class B. report
Filtration (wet) -
Class A. The
Class B. report
1000h after total acid number -
A Grade. 0.3,0.3,0.3
Class B. report, report, report -
The total acid number (in dollars KOH)
Up 2mgKOH/g time
Grade product. 3000,3000,2000,2000
First Grade.2000,2000,1500,1500
Qualified. 1500,1500,1000,1000
A Grade. 3500,3000,2500
Grade B.2000,2000,1500,1000
1000h sludge -
A Grade.200,200,200
Class B. report, report, report -
Table B.1 (continued)
The project GB 11120-1989 standard TSA varieties
Sludge total oxidation products
Excellent grade, first grade. report
Excellent grade, first grade. report
Qualified. -
Cleanliness/level -
Class A. -/18/15
Class B. report
END: Draft Version (GB 11120-2011)
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 261Determination of flash point - Pensky-Martens closed cup method
- GB/T 265Petroleum products--Determination of kinematic viscosity and calculation of dynamic viscosity
- GB/T 2541Petroleum products--Computation table for viscosity indices
- GB/T 5096Test method for corrosiveness to copper from petroleum products by copper strip test
- GB/T 6540Determination for colour of petroleum products
- GB/T 7600Determination of water content in transformer oils and turbine oils in service by coulometric method
GB/T 1884 · GB/T 1885 · GB/T 1995 · GB/T 3141 · GB/T 3535 · GB/T 3536 · GB/T 4756 · GB/T 4945 · GB/T 7304 · GB/T 7305 · GB/T 12579 · GB/T 12581 · GB/T 14039 · GB/T 14832 · GB/T 18854 · GB/T 19936.1
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- GB/T 8564-2023Technical specification for installation of hydraulic turbine-generator unit
- GB/T 21718-2021Fundamental technical requirements for small hydraulic turbines
- GB/T 39644-2021Plain bearings—Technical specifications for Tin-based alloy plain bearings of rotating machinery
- GB/T 6165-2021Test method of the performance of high efficiency particulate air filter—Efficiency and resistance
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Related Standards
GB/T 11133-2015 — Standard test method for determination of water in petroleum products, lubricating oils and additives - Coulometric Karl Fischer titration method
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