SH/T 0066-2002 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| SH/T 0066-2002 | English | 230 |
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Standard test method for foaming tendencies of engine coolants in glassware
| Valid |
| SH/T 0066-1991 | English | 199 |
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2 days
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(Toru engine coolant bubble to assay (glassware Act))
| Obsolete |
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SH/T 0066-2002: Standard test method for foaming tendencies of engine coolants in glassware---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/SHT0066-2002
SH
PETROCHEMICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 75.080
E 49
SH/T 0066-2022
Replacing SH/T 0066-1991
Standard Test Method for Foaming Tendencies of Engine
Coolants in Glassware
ISSUED ON: MAY 31, 2002
IMPLEMENTED ON: JULY 1, 2002
Issued by: State Economic and Trade Commission
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms ... 5
4 Overview of Method ... 6
5 Meaning and Usage ... 6
6 Instruments ... 6
7 Reagents and Materials ... 8
8 Test Solution ... 8
9 Test Conditions ... 8
10 Test Procedures ... 9
11 Report ... 9
Appendix A (Standard) Specification of Thermometer ... 11
Standard Test Method for Foaming Tendencies of Engine
Coolants in Glassware
1 Scope
1.1 This Standard specifies the method for determining the foaming tendencies of engine
coolants using glassware under certain temperature and ventilation conditions controlled in the
laboratory.
1.2 This Standard involves some hazardous materials, operations and equipment, but it does
not intend to make recommendations on all safety issues related to this. Therefore, users shall
establish appropriate safety and protection measures and determine applicable management
systems before using the standard.
2 Normative References
The following standards include provisions that constitute part of this Standard by reference.
Unless otherwise specified in the standard, the following referenced standards shall be the
currently valid standards.
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 12579 Determination of foaming characteristics of lubricating oils
SH/T 0065 Engine coolant for rust preventive agent test sample taking and preparation of
aqueous solution
ASMT D 3585 Standard specification for ASTM reference fluid for coolant tests
3 Terms
For the purposes of this Standard, the follow terms apply.
3.1 Break time
The time from gas stop to foam bursting and until an "eye" appears on the liquid surface.
3.2 Eye
The bubble-free area surrounded by the foam attached to the wall of the measuring cylinder on
the liquid surface.
4 Overview of Method
The mixed solution of coolant and water was kept at a constant temperature of 88°C ± 1°C;
ventilated with a constant air flow for 5 min; and measure its foam volume and break time.
5 Meaning and Usage
In practice, this method is usually used to distinguish coolants with excessive foaming tendency
in order to select coolants suitable for further analysis to determine their performance.
NOTE: During the use of the coolant, as time goes by or the coolant is contaminated, its foaming
tendency shall increase. A certain pressure shall be maintained to inhibit the formation of foam in the
coolant.
6 Instruments
6.1 Container: 500mL graduated heat-resistant glass cylinder, the minimum scale is 5mL, the
diameter is 45mm ~ 50mm, and the length is 380mm.
6.2 Water bath: 4000mL glass container, which can at least immerse the 350mL scale line of
the 500mL measuring cylinder below the liquid surface.
6.3 Heater: An electric heater that can keep the bath temperature at 88°C±1°C.
6.4 Gas diffusion head: 25.4mm in outer diameter; a sand core ball made of sintered crystalline
alumina. The following conditions shall be met when measuring according to the Appendix A
of GB/T 12579:
Maximum pore size/μm: no more than 80
Permeability at 2.45kPa pressure/(mL/min): 3000~6400
6.5 Thermometer 1] meet the requirements of Appendix A, or use a common thermometer with
a temperature range of 0°C~100°C and a graduation value of 1°C.
6.6 Air source: A clean and dry air source that is free of grease and other pollution and can
ensure the specified gas flow rate through the diffusion head.
6.7 Stopwatch: Graduation value 0.2s.
1] The thermometer specification in ASTM D 1881-97 is given in the Appendix A of this Standard; and add the
provision to use domestic common thermometer.
7 Reagents and Materials
7.1 Purity of water: Unless otherwise specified, the water used in the standard is the Grade-2
water specified in GB/T 6682.
7.2 Acetone: Analytically pure, rinse and dry the test instrument.
WARNING: Acetone is highly flammable.
7.3 Reference coolant: Unless otherwise specified, the reference coolant refers to the coolant
without defoaming agent specified in ASTM D 3585.
7.4 Cleaning solution: refers to the acidic or alkaline cleaning solution used to clean glass
containers between tests. It is selected according to the specific situation. For example, chromic
acid cleaning solution and sodium (potassium) hydroxide alcohol solution are commonly used
acidic and alkaline cleaning solutions, respectively.
WARNING: The cleaning solution is a strong oxidant or strong acid or alkali. Avoid contact with skin,
eyes, and clothing. Do not inhale steam. It is best to operate in a ventilated cabinet.
8 Test Solution
8.1 Prepare a 33% (V/V) aqueous solution from the reference coolant concentrate.
8.2 Use the glass beaker used to prepare the reference coolant to prepare an aqueous solution
containing 33% (V/V) concentrate from the coolant to be tested. Rinse the glass beaker with
water before preparing the solution. Dilute the additive concentrate with water to the
recommended concentration. Sampling and specimen preparation are carried out in accordance
with SH/T 0065 to ensure that the prepared specimen contains all insoluble substances and is
representative.
9 Test Conditions
9.1 Test temperature: During the test, the constant temperature water bath liquid level is
maintained at the 350mL~375mL scale position of the measuring cylinder; and the test solution
temperature is maintained at 88°C ±1°C, which is suitable for both high-boiling point and low-
boiling point coolants.
9.2 Air flow: Maintained at 1000mL/min ± 25mL/min.
9.3 Number of tests: The reference coolant is used to determine whether the used glassware and
test instruments have residual defoaming agent. If the foam volume of the measured reference
coolant is greater than 250mL and the break time is greater than 8s, pour out the reference
coolant in the glassware, rinse it with water, and prepare for the test.
Each sample is repeatedly tested for three times, and each time a new specimen prepared
according to the requirements of Subclause 8.2 is used. The used measuring cylinder and gas
diffusion head shall be thoroughly cleaned before each test. The measuring cylinder is cleaned
with tap water, cleaning fluid, and water in turn. The gas diffusion head is immersed in acetone
and water in turn; and is repeatedly cleaned by suction and compressed air. All test instruments
are fully rinsed with water before the test.
NOTE: Before each test, wipe the glass measuring cylinder, ventilation pipe and gas diffusion head to
remove the residual defoaming agent and glass cleaning fluid from the previous test, because these
residues shall affect the reproducibility of the test.
10 Test Procedures
10.1 Place the measuring cylinder containing 145mL of specimen in a constant temperature
bath; heat the specimen to 88°C ±1°C; immerse the gas diffusion head in the specimen; make
the gas diffusion head just touch the bottom of the measuring cylinder and be located in the
center of the measuring cylinder (see Figure 1). When the specimen temperature in the
measuring cylinder reaches the test temperature 1], read the initial volume of the specimen,
accurate to 5mL.
10.2 Connect the air source, rotate the three-way valve to allow the gas to flow to the ventilation
pipe; and use a gas flow meter or other suitable instrument that can accurately measure the air
flow to adjust the air flow to 1000mL/min±25mL/min.
10.3 If the specimen evaporates before ventilation and the volume decreases, water shall be
added to the initial volume and the specimen temperature shall be brought to the specified
temperature.
10.4 When the first bubble appears in the specimen, start timing and ventilate for 5min.
10.5 At the end of 5 min, immediately read the volume of the rising foam, accurate to 5mL;
minus the initial volume of the liquid after immersion of the gas diffusion head as the foam
volume (mL).
10.6 Rotate the three-way valve to close the air source; and put the air inlet of the ventilation
pipe in a venting state; and record the time from stopping the air supply to the gradual break of
the foam until the "eye" appears on the liquid surface, as the break time (s), accurate to ±0.2s.
11 Report
Take the arithmetic mean of the three results as the measurement result. The test results can be
expressed in the following form.
1] The ASTM D 1881-97 standard does not describe the location of the gas diffusion head and the reached test
temperature. This Standard still adopts the relevant description in the SH/T 0066-91 standard.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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