MT 76-2002 Emulsified oil, concentrate and high water content hydraulic fluid for hydraulic support (column)
Some standard content:
ICS73.100.99
Registration No.: 10306-2002
Coal Industry Standard of the People's Republic of China
MT76—2002
Emulsifying oil, concentrate and high-water content hydraulic fluid usedfor powered supportandpropPublished on April 8, 2002
National Economic and Trade Commission
Implementation on September 1, 2002
MT76—2002
Sections 5.1.2, 5.1.3, 5.1.5, 5.3.2, 5.3.3, 5.3.4, 5.3.5, 5.3-6 and 5.3-7 of this standard are mandatory, and the rest are recommended.
This standard is a revision of MT76-1983 "Emulsified Oil for Hydraulic Supports". The standard name, scope of application, technical content and writing structure have all changed:
-The standard name has been changed to "Emulsified Oil, Concentrates and Highly Aqueous Hydraulic Fluids for Hydraulic Supports (Columns)"; -The scope of application includes two types of highly aqueous hydraulic fluids for hydraulic supports and pillars, emulsified (HFAE) and solution (HFAS), and emulsified oils and concentrates for preparing the hydraulic fluids
-The product brand has been changed to classification and specification; the technical content has been increased to "lubricity" requirements. Appendices A and B of this standard are appendices to the standard. Appendices C and D of this standard are prompt appendices. This standard It will replace MT76-1983 from the date of implementation. This standard is proposed by the China Coal Industry Association. This standard is under the jurisdiction of the Coal Industry Coal Mine Special Equipment Standardization Technical Committee. This standard was drafted by the Testing Center of the China Coal Research Institute. The main drafters of this standard are Han Guoqiang, Jia Dajun, Wang Ping, Han Yong, and Xu Haikuang. This standard is entrusted to the Testing Center of the China Coal Research Institute for interpretation. 1 Scope
Coal Industry Standard of the People's Republic of China
Emulsifying oil, concentrate and high-water content hydraulic fluid used for powered supports (columns)
Emulsifying oil, concentrate and high-water content hydraulic fluid used for powered supports (columns) supportandpropMT76-2002
ReplacesMT76--1983
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of emulsified (HFAE and solution (HFAS) high-water hydraulic fluids and emulsified oils and concentrates used to prepare the hydraulic fluids. This standard applies to high-water hydraulic fluids used in hydraulic supports and external injection-type single hydraulic props and emulsified oils and concentrates used to prepare these hydraulic fluids. Concentrates include liquid concentrates and solid powder concentrates. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is released, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T265-1988 Determination of kinematic viscosity and calculation of dynamic viscosity of petroleum products GB/T267-1988
Flash point and Determination of fire point (open cup method) GB/T510-1983 Determination of freezing point of petroleum products GB/T1690-1992 Test method for liquid resistance of vulcanized rubber GB/T3142-1982 Determination of load-bearing capacity of lubricants (four-ball method) GB/T4756-1998 Manual sampling method for petroleum liquids GB/T11143-1989 Test method for rust prevention of mineral oil with inhibitors in the presence of water HG4-1567-1985 Rubber compound for rubber parts of comprehensive mechanized equipment for coal mining SH 0004-1990
Solvent oil for rubber industry
SH0164—1992
Rules for packaging, storage, transportation and delivery acceptance of petroleum products SH0229-1992 Sampling method for solid and semi-solid petroleum products 3 Definitions
This standard adopts the following definitions
High-water content hydraulic fluid used for powered support and prop
Refers to a water-in-oil emulsion composed of emulsified oil and more than 90% (mass ratio) water, or a solution-type diluent composed of a concentrate and more than 90% (mass ratio) water.
4 Product Classification
4.1 Product Varieties
Approved by the State Economic and Trade Commission on April 8, 2002, implemented on September 1, 2002
MT76-2002
Products are divided into two categories according to the type of high-water content hydraulic fluid: emulsion type and solution type. Each type of product is divided into 5 grades according to the maximum hardness of the water quality applicable during use, with grade values of 5, 10, 15, 20, and 25 respectively. 4.2 Product model
The product model consists of English letters and Arabic numerals, and the arrangement is as follows: Usage concentration code
Applicable water hardness code
High water content hydraulic fluid type code
Industry code
“Industry code\ uses the capital letter M to represent the coal industry; “High water content hydraulic fluid type code” is represented by capital letters, E represents emulsified type, and S represents solution type; “Applicable water hardness code” uses one or two Arabic numerals to represent the water hardness grade applicable to the product; “Use concentration code” uses Arabic numerals to represent the mass percentage of the product’s specified use concentration. 4.3 Product marking
Products are marked in the order of product name, product model, and product standard number. 4.4 Marking example
Emulsified oil ME15-5MT××X× indicates emulsified oil for hydraulic supports and external injection type single hydraulic props, which can be used for emulsions with a concentration of 5% (mass ratio) in water with a hardness grade of less than 15. 5 Technical requirements
5.1 Emulsified oil, liquid concentrate
5.1.1 Appearance: When the temperature is 10-35℃, the product is a transparent and uniform fluid. 5.1.2 Kinematic viscosity (40℃): not more than 100mm/s5.1.3 Flash point is not less than 110℃.
5.1.4 Doubtful point: not higher than -5℃.
5.1.5 Freeze-thaw resistance: After the product is frozen at -16~～-21℃ and melted at room temperature of 10~35℃ for 5 cycles, the appearance should return to its original state.
5.1.6 Dispersibility in water: The product should be evenly dispersed when dropped into water. 5.2 Solid powder concentrate
5.2.1 Appearance: uniform, without hard lumps, and without moisture absorption. 5.2.2 Dispersibility in water: The product should be evenly dispersed when added to water. 5.3 High-water hydraulic fluid (emulsion, diluent) 5.3.1 The water quality used by the user in preparing high-water hydraulic fluid should meet the following requirements: The water quality should be colorless, odorless, free of suspended matter and mechanical impurities; the pH value range is 6~9, the chloride ion content in the water should not exceed 200mg/L, and the sulfate ion content in the water should not exceed 400mg/L. Artificial hard water for inspection should be prepared according to Appendix A (Appendix of the standard). 5.3.2 pH value: The pH value of the test solution formed by emulsified oil or concentrate and distilled water at the specified concentration should be 7.5-9. 5.3.3 Stability;
a) Thermal stability and room temperature stability: Emulsified oil or concentrate and artificial hard water of corresponding hardness are prepared into test solution at the specified concentration. The above test solution is left to stand for 168 hours at (70±2)℃ and 10-35℃ respectively. It shall not be separated, separated, flocculent or precipitated. The amount of oil soap precipitation shall not be greater than 0.1% (volume ratio). b) Oscillation stability: Emulsified oil and artificial hard water of corresponding hardness are prepared into test solution at 60% of the specified concentration. After oscillation at an overflow of 10-35℃, no oil soap shall be precipitated. 2
MT76-2002
5.3.4 Rust resistance: Emulsified oil or concentrate is mixed with artificial hard water of corresponding hardness according to the prescribed concentration to form a test solution. At a temperature of 10~35℃, a drop test is performed on the cast iron surface. After 24 hours, there should be no rust or color change. 5.3.5 Corrosion resistance: Emulsified oil or concentrate is mixed with 0.05mol/L sodium chloride solution at 40% of the prescribed concentration to form a test solution. A No. 15 steel rod is immersed in the above test solution at a temperature of (60±2)℃. After 24 hours, there should be no rust; a No. 62 brass rod is immersed in the above test solution at (60±2)℃. After 24 hours, there should be no color change or corrosion. 5.3.6 Compatibility of sealing materials: Emulsified oil or concentrate is mixed with distilled water to form a test solution with a specified concentration. The rubber test piece is immersed in the above test solution at a temperature of (70 ± 2) ° C. After 168 hours, its volume expansion rate should not be greater than 6%, and shrinkage is not allowed. 5.3.7 Lubricity: Emulsified oil or concentrate is mixed with artificial hard water of corresponding hardness to form a test solution according to the specified concentration. The load-bearing capacity is measured according to GB/T3142 (four-ball method). The maximum non-seizure load P: value should not be less than 392N (40kgf). 5.3.8 The high-water hydraulic fluid formed by emulsified oil or concentrate and water meeting the requirements of 5.3.1 should have no irritating odor, no damage to human skin, no toxic substances, and have defoaming and mildew resistance that does not hinder use. 6 Test method
6.1 Product appearance
Under the condition of 10～35℃, inject 100mL of the tested emulsified oil or liquid concentrate into a 100mL colorless transparent stoppered measuring cylinder with a diameter of 30mm, and point the measuring cylinder to a bright place (natural light). The scale line on the back of the measuring cylinder should be clearly visible. Turn the measuring cylinder upside down, and the film formed on the wall of the measuring cylinder should be uniform.
6.2 Product kinematic viscosity
The kinematic viscosity of emulsified oil and liquid concentrate shall be carried out in accordance with GB/T265-1988, but the provisions of 4.1 shall not be implemented. 6.3 Product flash point
The flash point of emulsified oil and liquid concentrate shall be carried out in accordance with GB/T267-1988, but the provisions of 5.1 shall not be implemented. If foaming occurs during the heating process, the heating speed can be slowed down (or heating can be stopped), and the normal heating speed can be resumed after the foam disappears. 6.4 Product Condensation Point
The condensation point of emulsified oil and liquid concentrate shall be determined in accordance with GB/T510-1983, but the provisions of 4.2 shall not be implemented. 6.5 Product Freeze-Thaw Resistance Test
Pour the emulsified oil or liquid concentrate into a 100mL round-bottom colorimetric tube with a diameter of 30mm to the 100mL mark, plug it tightly with a stopper, put it in a refrigeration device at a temperature of -21 to -16.℃ for 8h, then take it out and place it at room temperature of 10 to 35℃ for 16h, as a freeze-thaw process. Repeat 5 cycles and inspect the appearance. 6.6 Water Dispersibility Test
In a 100mL stoppered measuring cylinder, pour 10 to 35℃ distilled water to the 100mL mark, then use a dropper to add 2 drops of emulsified oil or liquid concentrate, or add 0.2g of solid powder concentrate, plug the measuring cylinder tightly, and invert it 4 times continuously to inspect the dispersion of the sample. 6.7 pH value
Prepare the emulsified oil or concentrate with distilled water according to the specified concentration to form a test solution. Use a pH 1-14 wide test paper and immerse it in the above test solution. Take it out after 0.5s and compare it with the colorimetric plate to determine its pH value. 6.8 Stability test
6.8.1 Thermal stability and room temperature stability test First clean the graduated narrow-necked flask (flask specifications see Appendix B (Standard Appendix), then soak it in chromic acid cleaning solution for 2h, then rinse it with clean water, and finally wash it three times with distilled water and dry it for use. Prepare the test solution according to the provisions of 5.3.3a), inject the prepared test solution into the above-treated narrow-necked flask to the 100mL scale, plug the bottle, and place it at (70±2)℃ and room temperature 10-35℃ for 168h to check whether there is stratification, water separation, floccules or precipitation, and whether there is oil soap precipitation. If so, record the type and volume of the precipitate. 6.8.2 Oscillation stability test
Prepare the stoppered measuring cylinder according to the method of 6.8.1, prepare the test solution according to the provisions of 5.3.3b), inject the above test solution into the treated 3
MT76-2002
100mL stoppered measuring cylinder to the 50mL scale, plug the measuring cylinder, and oscillate for 1min at a temperature of 10~35℃, an amplitude of 20~30cm, and a frequency of 100~120 times/min. After standing, wait for the foam to disappear and check the precipitation of oil soap. 6.9 Rust resistance test
Prepare the test solution according to the provisions of 5.3.4. The standard cast iron test piece is thoroughly derusted and polished to a smooth and bright state with a test piece grinding and polishing machine (see Appendix C (Suggested Appendix)). There should be no obvious processing marks when visually observed. Then wipe it clean with absorbent cotton and filter paper. If necessary, it can be cleaned with solvent oil specified in SH0004 and dried. Use a dropper to absorb the above test solution and drop 5 drops on the surface of the cast iron test block in a plum blossom format, with each drop having a diameter of 4~5mm. Cover it with a surface blood with a diameter of 60mm, place it at room temperature of 10~35℃ for 24h, and then check the rust condition. Note: The brand of the casting test piece is HT300, the diameter of the test piece is 50mm, and the height is 20mm. 6.10 Anti-corrosion test
Prepare the test solution according to the provisions of 5.3.5, and the test piece uses a No. 15 steel rod and a No. 62 brass rod. Conduct the test according to GB/T11143, but do not use a stirring device.
6.11 Sealing material compatibility test
Make a 50mm×25mm×5mm rubber test piece from a rubber sheet that meets the requirements of HG41567, and accurately measure its volume. After immersing it in the test solution prepared according to the provisions of 5.3.6 for 168h at a temperature of (70±2)℃, check its volume change. The test methods and procedures shall be carried out in accordance with the provisions of GB/T1690. 6.12 Lubricity test
Prepare the test solution in accordance with the provisions of 5.3.7. The test methods and procedures shall be carried out in accordance with GB/T3142. 7 Inspection rules
7.1 Inspection classification
Product inspection is divided into factory inspection and type inspection. 7.2 Factory inspection (see Appendix D (Suggested Appendix) for inspection items) All products must be inspected before leaving the factory. The factory inspection items for emulsified oil and liquid concentrate include all the specified items except 5.2, 5.3.6, 5.3.7, and 5.3.8. The factory inspection items for solid powder concentrate include all the specified items except 5.1, 5.3.6, 5.3.7, and 5.3.8. All inspection results shall be qualified, otherwise the batch of products shall be unqualified. 7.3 Type inspection (see Appendix D (suggested appendix) for inspection items) Type inspection should be carried out in any of the following situations: a) When a new product or old product resumes production after a long period of suspension; b) When there are major changes in raw materials or production processes that may affect product quality; c) When the user has objections to the performance and quality of the product; d) When there is a significant difference between the factory inspection results and the last type inspection; e) When the national quality and technical supervision agency proposes a type inspection requirement; ) During normal production, a type inspection should be carried out every six months. 7.3.1 The quantity of master samples used for type inspection should generally be no less than 1000kg. 7.3.2 Type inspection for emulsified oils and liquid concentrates includes all items in 5.1 and 5.3, and type inspection for solid powder concentrates includes all items in 5.2 and 5.3. All inspection results should be qualified, otherwise the type inspection is unqualified. 7.4 Sampling rules
The sampling of emulsified oil and liquid concentrate shall be carried out in accordance with GB/T4756. 1L shall be taken from the average sample for inspection and retention, of which the retention amount is 0.5L. The sampling of solid concentrate shall be carried out in accordance with SH0229. 1kg shall be taken from the average sample for inspection and retention, of which the retention amount is 0.5kg.
8 Marking, packaging, transportation, storage
The packaging, transportation and storage of products shall be carried out in accordance with SH0164. Safety signs shall be posted on prominent parts of the container. When using small containers (large barrels, white 4
MT 762002
iron drums), there should be a circle of oil decoration marks with a width of 200mm in the middle of the container surface. The mark of emulsified products is pink, and the mark of solution products is pink with a white S mark.
Artificial hard water
Hardness grade
Note: distilled water is used for preparation
MT76-2002
Appendix A
(Appendix of the standard)
Table A1 Composition of artificial hard water of different hardness
Composition of artificial hard water/(mg·L-1)
MgSO.·7HO
CasO.·2H,0
MT76—2002
Appendix B
(Appendix of standard)
Narrow-necked flask for stability test
Schematic diagram of narrow-necked flask for stability test
Unit: mm
Project name
Kinematic viscosity
Freeze-thaw resistance
Dispersibility in water
Stability
Rust resistance
MT76-2002
Appendix C
(Appendix of suggestion)
Test piece grinding and polishing machine
1—grinding disc; 2—test piece, 3 chuck: 4 pressure regulator; 5 guide slide rail 6 crank connecting rod: 7—lifting mechanism
Figure C1 Schematic diagram of test piece grinding and polishing machine
Appendix D| |tt||(Appendix of reminder)
List of factory inspection and type inspection items for emulsified oil and concentrate DI
Corresponding clauses
Emulsified oil,
Liquid concentrate
Solid powder
Concentrate
Factory inspection
Emulsified oil,
Liquid concentrate
Solid powder
Concentrate
Type inspection
Emulsified oil,
Liquid concentrate
Solid powder
Concentrate
Item name
Corrosion resistance
Compatibility with sealing materials
Lubricity
Safety, defoaming property, mildew resistance
Note: V is required to be inspected: X is not required to be inspected.
MT76-2002
Continued Table D1
Corresponding clauses
Emulsified oil,
Liquid concentrate
Solid powder
Concentrate
Factory inspectionbzxz.net
Emulsified oil,
Liquid concentrate
Solid powder
Concentrate
Type inspection
Emulsified oil,
Liquid concentrate
Solid powder
Concentrate
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