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SH/T 0682-1999 (SH/T0682-1999)

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SH/T 0682-1999: PDF in English (SHT 0682-1999)
SH/T 0682-1999
PETROCHEMICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 75.100
Standard test method for oil separation from
lubricating grease during storage
ISSUED ON: SEPTEMBER 01, 1999
IMPLEMENTED ON: APRIL 01, 2000
Issued by: National Petroleum and Chemical Industry Bureau
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms ... 4 
4 Method summary ... 5 
5 Significance and use ... 5 
6 Instruments and materials ... 5 
7 Sample ... 7 
8 Preparation ... 8 
9 Test steps ... 8 
10 Calculation ... 8 
11 Precision ... 9 
12 Report ... 9 
_______________________________________________________________________
1 Scope
1.1 This Standard specifies the test method for oil separation from lubricating
grease during storage. This method is only applicable to the lubricating grease
of which the consistency is greater than 0.
1.2 This standard does not address all safety issues that may be related to the
use of this method. Before use, an appropriate safety and health operation
procedure shall be established and the scope of use shall be determined.
2 Normative references
The following referenced documents are indispensable for the application 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.
SH 005, Solvent Oil for Paint Industry
GB/T 6003.1, Test sieves of metal wire cloth
3 Terms
For the purposes of this document, the following terms apply.
3.1 lubricating grease
Semi-fluid with thickener added to liquid lubricant to solid product.
3.2 thickener in lubricating grease
Constructional material that has good physical dispersion, is dispersed in base
oil to form product structure.
3.3 oil separation
The phenomenon of separating the liquid part from the lubricating component.
Standard test method for oil separation
from lubricating grease during storage
4 Method summary
4.1 Install the lubricating grease on a 75µm strainer. At 25°C±1°C, under
1.72kPa±0.07kPa air pressure, after continuous test for 24h, weigh the mass of
oil that is separated and added into the oil containing dish.
5 Significance and use
5.1 The lubricating grease has oil separation. The consistency of remaining
components increases, which shall affect product performance.
5.2 The test results of this methods are directly related to the oil separation of
the lubricating grease that is stored in the 15.88kg barrel.
5.3 This method does not describe the stability of lubricating grease under
dynamic working conditions.
6 Instruments and materials
6.1 Instruments
6.1.1 The test instrument is composed of the following components: tightly
matched cups and lids, strainers, funnels and oil dishes. Figure 1 is the split
photo of type A pressure oil separation test instrument. Figure 2 is the detailed
structure diagram of type A test instrument, where:
Cover: equipped with an air inlet to introduce compressed air;
Cup: there is a hole in the side to prevent back pressure;
Funnel: hold the strainer and collect the separated oil;
Strainer: 75µm (No. 200) stainless-steel strainer, marked as Φ104.8×12.7-
0.075/0.053-GB/T 6003.1-1997, in accordance with the
requirements of GB/T 6003.1.
Oil containing dish: glass dish that contains the separated oil, 20mL.
6.1.2 Pressure system: supply and regulate air pressure, equipped with
pressure gauge or other suitable pressure indicating instrument and pressure
reducing valve to prevent pressure fluctuation. Compressed air shall be purified
to be oil-free and water-free.
6.2 Materials
8 Preparation
8.1 Use solvent oil to carefully clean the strainer, funnel and oil containing dish.
Dry with air.
8.2 Check whether the strainer shall affect the passage of the separated oil
before installation. The strainer must be smooth and free of any irregularities
on the surface (such as wrinkles, bumps, breaks). Once found, it must be
replaced.
8.3 The funnel must be clean, otherwise the residue shall affect the flow of the
separated oil.
8.4 Check the covers and cups. Any unevenness or distortion shall affect the
tight sealing of the combined surface between the parts.
8.5 When the O-ring is worn out, it must be replaced in time.
9 Test steps
9.1 Place the strainer on top of the funnel. Weigh the combined piece (m1), to
the nearest of 0.05g. Use a spatula to completely fill the space in the strainer
with lubricating grease. The depth of filled lubricating grease is 12.7±0.3mm.
Avoid unnecessary work to prevent mixing of air. Use the straight edge of the
spatula to scrape off excess lubricating grease and smooth the surface. Avoid
applying the lubricating grease over the strainer. Weigh the combined piece
after sample loading (m2), to the nearest of 0.05g.
9.2 Weigh the cleaned and dry oil containing dish (m3), to the nearest of 0.05g.
Place the oil containing dish on the receiving tray in the center of the cup. And
equip the instrument as shown in Figure 1. Use a rubber tube of appropriate
length to connect the compressed air to the air inlet on the cover.
9.3 Before the test, place the instrument and sample at 25°C±1°C. Regulate
the air pressure at 1.72kPa±0.07kPa. Continue testing 24h at this temperature
and pressure.
9.4 After test, weigh the oil containing dish (m4), to the nearest of 0.05g.
10 Calculation
The oil separation amount of lubricating grease, x, % (m/m), is calculated
according to formula (1):
......
 
(Above excerpt was released on 2020-05-16, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/SHT0682-1999