NB/SH/T 0895-2015 Determination of filter blocking tendency of middle distillate fuels and liquid fuels

AI-translated method card — human verification pending. This is not an official translation of the standard. Unclear source values remain unverified; check the original standard and product certificate before use.

Card type: Test method

1. Method number / full title / English name / replacement relationship

• Standard number: NB/SH/T 0895—2015
• Chinese full title: Determination of filter blocking tendency of middle distillate fuels and liquid fuels
• English name: Determination of filter blocking tendency of middle distillate fuels and liquid fuels
• Replacement relationship: first publication (original text: this standard is first published)
• Adoption relationship: adopted by redrafting method with modification of ASTM D2068-13 "Determination of filter blocking tendency"
• Publication/implementation: published on 2015-10-27, implemented on 2016-03-01
• Custodianship: National Technical Committee for Standardization of Petroleum Products and Lubricants, Subcommittee on Petroleum Fuels and Lubricants (SAC/TC 280/SC1)
• Drafting organization: Sinopec Luoyang Engineering Co., Ltd.
• Main drafters: Ou Lizhen, Hong Liyan, Liu Yawen, Li Lifeng

2. Scope of application and non-applicability

• This standard specifies methods for determining filter blocking tendency (FBT) and filterability of fuels using three method steps (A, B, C) with different filter media.
• Applicable to fuels with kinematic viscosity at 40℃ in the range of 1.3 mm²/s~6.0 mm²/s, including middle distillate fuels and liquid fuels, such as biodiesel, biodiesel blended fuels, etc.
• Not applicable to the determination of fuels containing free water (undissolved water) (see 7.3).
• The three method steps use different filter media, and the results depend on the specified filter and membrane; if a product specification specifies a particular method step, other method steps and filter media shall not be substituted without the consent of the product specification setter.

3. Method principle

• A certain amount of sample is passed through a specific filter membrane at a constant rate (20 mL/min), and the pressure difference before and after the filter and the volume of sample passing through the filter are monitored until the pressure applied to the filter reaches 105 kPa or the amount of fuel passing through the filter reaches 300 mL; this pressure and flow rate are used to calculate the filter blocking tendency (FBT) (see Note to 3.1). The lower the FBT, the better the fuel (see Chapter 5).
• The nominal pore size of the glass fiber filter membrane specified in Method A and Method B is 1.6 μm. The filter in Method B is pre-encapsulated.
• The nominal pore size of the nylon filter membrane specified in Method C is 5 μm, and the filter is pre-assembled.
• Definition of terms:
  • 3.1 Filter blocking tendency (FBT): a dimensionless calculated value indicating the tendency of particulate matter in the fuel to plug or block the filter. This value is calculated from the pressure when the fuel passes through the filter at the end of the test or the volume of fuel filtered, using one of the two formulas in Chapter 10; the interpretation of the results is given in Chapter 5.
  • 3.2 Filterability: the relationship between the volume of fuel filtered and the increase in pressure during filtration. It can be evaluated by the pressure when a specific volume of fuel flows through the filter or the volume of fuel passing through the filter when a specified pressure is reached, and can also be assisted by making a plot of volume versus pressure, see Appendix A.

4. Reagents and materials (purity / preparation)

• No reagent list is provided in the available source; the materials involved are filter membranes and filter assemblies:
  • 6.2.1.2 Filter membrane A: A grade glass fiber, nominal pore size 1.6 μm, nominal diameter 13 mm, effective filtration area 63.6 mm²~78.6 mm²; the Gurley (Gurley) time of each batch of filter membrane (determined using the Gurley method procedure in Chapter 4 of GB/T 458—2008) is between 12.5 s/300 mL~(upper limit requires confirmation against the source standard (source-text extraction), the number here is missing in the source text)s/300 mL.
  • 6.2.2.2 Filter membrane B: GF/A grade glass fiber, nominal pore size 1.6 μm, effective filtration area 95.0 mm²~(upper limit requires confirmation against the source standard (source-text extraction))3.1 mm² (the number in the source text is suspected to be source-text extraction noise, requires confirmation against the source standard); each batch shall be inspected (one or more filter membranes tested per batch) and quality controlled (using a method, tested with a fluid of known force/flow characteristics, for example using the Gurley method procedure of GB/T 458—2008), and the results shall be equivalent to the results of the filter A assembly.
  • 6.2.3.2 Filter membrane C: nylon material, nominal pore size 5 μm (original text "nominal pore size and wm" requires confirmation against the source standard (source-text extraction)), effective filtration area 143.2 mm²~165.2 mm²; each batch shall be inspected (one or more filter membranes tested per batch) for the effective filtration area of the filter membrane, and quality controlled (see Note to clause 6.2).
• 6.2 Note: The effective filtration area is determined by measuring the diameter of the sediment in the center of the filter membrane.

5. Apparatus and equipment

• 6.1 Apparatus: as described in Appendix B, see Figure B.1, it can be a complete set of apparatus or assembled from individual components.
• 6.2 Filter membrane and assembly (see Section 4).
• 6.2.1 Filter A (for Method A):
  • 6.2.1.1 Filter chamber: stainless steel body, nominal diameter 13 mm, with a Luer (LUER) fitting on top for connection to the filtration apparatus. The assembly diagram is shown in Figure 1.
• 6.2.2 Filter B (for Method B):
  • 6.2.2.1 Filter chamber: disposable "syringe type", polypropylene material, with Luer fitting and conical fitting and factory pre-encapsulated filter membrane. The filter is shown in Figure 2, with an adapter as described in 6.9 so that the sample flows in from the conical fitting and out from the Luer fitting. The filter membrane is supported by a coarse glass fiber pad, as shown in Figure 2.
• 6.2.3 Filter C (for Method C):
  • 6.2.3.1 Filter chamber: disposable "syringe type", polypropylene material, as shown in Figure 3, with Luer fitting and conical fitting and factory pre-assembled filter membrane. The sample enters from the Luer fitting, the filter membrane is placed on a groove with interrupted coaxial ribs, and the outlet is recessed to avoid local blockage.
• 6.3 Graduated cylinder: 25 mL, made of glass or other suitable transparent material, minimum scale 0.5 mL, used to check the flow rate.
• 6.4 Graduated cylinder: 500 mL, made of glass or other suitable transparent material, minimum scale 5 mL, used to check the flow rate. If required, it can also be used to measure the volume of the receiving beaker.
• 6.5 Stopwatch: precision (original value missing, requires confirmation against the source standard (source-text extraction)), used to check the flow rate and prepare the sample.
• 6.6 Thermometer: temperature sensor or glass liquid thermometer, measuring range at least 15℃~25℃, accuracy ±0.5℃ or higher.
• 6.7 Tweezers: shovel-shaped tip, for filter A.
• 6.8 Adjustable wrench: plastic or metal, for filter A.
• 6.9 Adapter: only for Method B, used to convert the Luer fitting on the apparatus to a size compatible with the conical fitting on filter B.
• 6.10 Splash guard tube: nylon or silicone rubber tube, 4 mm inner diameter for filters A and C, 6 mm inner diameter for filter B, to reduce sample splashing in the fuel receiving beaker.
• Appendix B Apparatus details:
  • B.2.1 Piston pump: capable of delivering sample at a constant flow rate of 20 mL/min±1 mL/min, flow rate can be adjusted and calibrated by mechanical means. The flow rate adjustment should have a locking device.
  • B.2.2 Pulse damper: a device that provides a smooth sample flow rate to the filter unit.
  • B.2.3 Pressure gauge: calibrated pressure gauge with scale in the range of 0 kPa~105 kPa, accuracy ±1 kPa.
  • B.2.4 Overpressure sensor: installed between the pump and damper of the automatic apparatus, can stop the pump if the pressure exceeds 200 kPa.
  • B.2.5 Pressure relief valve: installed in front of the handle of the filtration device, used to release pressure when the filter is blocked in the automatic apparatus, or when verifying and calibrating the pressure sensor.
  • B.2.6 Fuel beaker and fuel receiving beaker: made of glass or other suitable transparent material, with a capacity of at least 400 mL, graduation value 10 mL. Note: For fuel beakers made of plastic materials, due to static electricity accumulation, particles may adhere to the beaker wall and may affect the results.
  • B.2.7 Printer: optional, for automatic apparatus, to record results and pressure/flow characteristic curves (see Appendix A).
  • B.2.8 The input and output components of the fuel sample shall be directly grounded to avoid static electricity accumulation.
  • Figure B.1 Composition: 1— thermometer; 2— fuel beaker; 3— pump; 4— pulse damper; 5— pressure gauge; 6— filter unit and pressure relief valve; 7— fuel receiving beaker.

6. Recommended operating conditions

• Flow rate: 20 mL/min±1 mL/min (4.1, B.2.1).
• Test termination conditions: pressure reaches 105 kPa or the amount of fuel passing through the filter reaches 300 mL (4.1).
• Sample temperature: 15℃~25℃ (9.1.2, 9.1.4).
• Startup pressure check: after restarting the pump 20 s, record the pressure gauge reading, which should be 7 kPa~40 kPa (9.2.3, 9.3.3, 9.4.2).
• Pressure gauge range: 0 kPa~105 kPa, accuracy ±1 kPa (B.2.3).
• Overpressure protection: the pump stops when the pressure exceeds 200 kPa (B.2.4).

7. Sampling and specimen preparation

• 7.1 Unless otherwise specified, sampling shall be carried out in accordance with GB/T 4756, GB/T 27867, or other equivalent sampling methods.
• 7.2 The container shall first be rinsed three times with the specimen to be tested, and at least 400 mL of a representative test specimen shall be taken and placed in containers lined with epoxy resin or dark glass bottles.
• 7.3 If the specimen has obvious visible free water (which can be determined by visual inspection: pour the specimen into a 100 mL glass graduated cylinder and observe at room temperature 20℃±5℃; if there is no free water, it should be transparent, with no suspended or settled water), the specimen shall be discarded, and a new specimen shall be taken.
  • Note 1: When the specimen temperature is below its cloud point temperature, a small amount of solid wax may mix with water and become turbid and unclear, interfering with the determination of free water.
  • Note 2: If the specimen color (determined in accordance with GB/T 6540) has a color number of 5 or darker, then free water and particulate matter may be obscured and missed and cannot be observed.
• 9.1 Specimen preparation:
  • 9.1.1 Except for the special cases described in 9.1.8, specimen preparation shall be carried out in accordance with 9.1.2~9.1.7.
  • 9.1.2 Measure the temperature of the specimen in the container (6.6); if necessary, adjust the specimen temperature to 15℃~25℃.
  • 9.1.3 Shake the specimen container vigorously 120 s±5 s, then let it stand 300 s±15 s.
  • 9.1.4 Measure no less than 350 mL of specimen into the fuel beaker, and check whether the specimen temperature remains at 15℃~25℃, and record the actual specimen temperature. If at this time there is obvious (free water, the text here is missing in the source, requires confirmation against the source standard (source-text extraction)) in the specimen, abandon the test and report the presence of water.
  • 9.1.5 Place the pump suction tube into the fuel beaker, and start the pump so that about 20 mL of specimen flows into the fuel receiving beaker to rinse the system, stop the pump, and discard the specimen in the fuel receiving beaker.
  • 9.1.6 When the test fuel has a high blocking tendency, the pressure reading may rise rapidly at the beginning of the test, so that the initial pressure cannot meet the requirement. If after (rinsing, the text here is missing in the source, requires confirmation against the source standard (source-text extraction)) and the filter unit this situation still exists, this pressure requirement may be ignored, and this fact shall be reported in clause 11.4.
  • 9.1.7 If not using an automatic instrument, use a stopwatch and a 500 mL graduated cylinder.
  • 9.1.8 The specimen may have been subjected to specific treatment as specified in other test methods; in this case, the aforementioned provisions shall still be observed, especially the temperature requirements, mixing of the specimen, and rinsing of the system. The precision of this standard may not be applicable to such specifically treated specimens.

8. Analytical procedure

• 8.1 Verification:
  • 8.1.1 Pressure and temperature: operate in accordance with the manufacturer's instructions, and verify whether the pressure and temperature respectively meet the provisions of B.2.4 and 6.6. Verify the pressure reading at least once at ambient atmospheric pressure (0 kPa) and at approximately 100 kPa pressure. If the equipment has not (been verified, the text here is missing in the source, requires confirmation against the source standard (source-text extraction)) within the past three months, pressure reading verification shall also be carried out. Verify the temperature reading at ambient temperature at least once every 12 months; if the reading does not meet the provisions of B.2.4, calibrate the sensor (8.2.1).
  • 8.1.2 Flow rate: operate in accordance with the manufacturer's instructions, and verify that the flow rate through the filter system is 20 mL/min±1 mL/min. Use a suitable graduated cylinder (6.4) to verify the flow rate by measuring the volume of liquid pumped within 15 min, at least 1 times per month. If the measured volume is between 285 mL~315 mL, the flow rate is correct. If more frequent checks of the flow rate are required, a 25 mL graduated cylinder (6.3) may be used to measure the liquid flow rate over 1 min; if the measured volume is not between 19 mL~21 mL, the pump shall be calibrated (8.2.2).
• 8.2 Calibration:
  • 8.2.1 Pressure and temperature: operate in accordance with the manufacturer's instructions, calibrate the pressure at atmospheric pressure (0 kPa) and at approximately 100 kPa, and calibrate the temperature measuring device at ambient temperature.
  • 8.2.2 Flow rate: operate in accordance with the manufacturer's instructions, set and lock the mechanical adjustment control of the pump flow rate so that the pump flow rate is 20 mL/min±1 mL/min; when calibrating the flow rate, the filter system shall be installed.
• 8.3 Instrument installation: as shown in Figure B.1, install the instrument without connecting the filter unit.
• 8.4 Filter assembly:
  • 8.4.1 Filter A (for method A): assemble the filter as shown in Figure 1. Use tweezers (6.7) to pick up a new filter membrane, being careful not to damage the filter membrane, and place the membrane with the grid-pattern-marked side facing up onto the support. Use an adjustable wrench (6.8) to help assemble or disassemble the filter chamber. Connect a splash guard tube (6.10) of suitable length (usually 80 mm~90 mm) to the outlet of the filter assembly. Note 1: It is very important to install the filter unit assembly exactly as shown in Figure 1. Note 2: Installing the filter A assembly too loosely or too tightly may lead to erroneous results.
  • 8.4.2 Filter B (for method B): connect a splash guard tube (6.10) of suitable length (usually 80 mm~90 mm) to the outlet of the filter assembly. Connect the adapter (6.9) to the Luer fitting at the instrument outlet.
  • 8.4.3 Filter C (for method C): connect a splash guard tube (6.10) of suitable length (usually 80 mm~90 mm) to the outlet of the filter assembly.
• 8.5 Fuel beaker preparation: rinse the fuel beaker with some specimen, then discard it.
• 8.6 Use of adapter: the adapter (see 6.9) is used only for method B. When performing method A or method C tests, the adapter is not required.
• 9.2 Method A:
  • 9.2.1 (the content here is missing in the source, requires confirmation against the source standard (source-text extraction))
  • 9.2.2 pump, and check (the content here is missing in the source, requires confirmation against the source standard (source-text extraction)). Note: (the content here is missing in the source, requires confirmation against the source standard (source-text extraction))
  • 9.2.3 If not (the content here is missing in the source, requires confirmation against the source standard (source-text extraction)) the device A assembly to the Luer fitting of the system. Restart the pump; after 20 s, record the pressure gauge reading, which should be 7 kPa~40 kPa. If the pressure gauge reading is not within this range, stop the pump and check for faults. (The source contains “kPa pressure reading, which may indicate that the filter membrane is installed incorrectly”)
  • 9.2.4 Observe the pressure reading during suction; if the pressure rises to 105 kPa, stop the pump immediately. Measure and record the specimen volume in the fuel receiving beaker, to the nearest 10 mL.
  • 9.2.5 When the pump has drawn 300 mL of specimen and the pressure reading has not risen to 105 kPa, record the pressure reading reached at the end of the test (see Note 3.1), to the nearest 5 kPa, stop the test, and inspect the filter medium of the filter unit; the stain of the sediment (if visible) should be 9 mm~10 mm in diameter. Otherwise, repeat the test.
• 9.3 Method B:
  • 9.3.1 Connect the adapter (6.9) to the Luer fitting of the system in accordance with the manufacturer's instructions.
  • 9.3.2 Connect the conical fitting of filter B to the adapter. Note: Method B uses an inverted syringe-shaped filter.
  • 9.3.3 Restart the pump; after 20 s, record the pressure gauge reading, which should be 7 kPa~40 kPa. If the pressure gauge reading is not within this range, stop the pump and check the instrument for faults.
  • 9.3.4 Observe the pressure reading during pump suction; if the pressure rises to 105 kPa, stop the pump immediately. Measure and record the specimen volume in the fuel receiving beaker, to the nearest 10 mL.
  • 9.3.5 When the pump has drawn 300 mL of specimen and the pressure reading has not risen to 105 kPa, record the pressure reading reached at the end of the test (see Note 3.1), to the nearest 5 kPa, and stop the test.
• 9.4 Method C:
  • 9.4.1 Install filter C onto the (system Luer, the text here is missing in the source, requires confirmation against the source standard (source-text extraction)) fitting.
  • 9.4.2 Restart the pump; after 20 s, record the pressure gauge reading, which should be 7 kPa~40 kPa. If the pressure gauge reading is not within this range, stop the pump and check the instrument for faults.
  • 9.4.3 Observe the pressure reading during pump suction; if the pressure rises to 105 kPa, stop the pump immediately. Measure and record the specimen volume in the fuel receiving beaker, to the nearest 10 mL.
  • 9.4.4 When the pump has drawn 300 mL of specimen and the pressure reading has not risen to 105 kPa, record the pressure reading reached at the end of the test (see Note 3.1), to the nearest 5 kPa, and stop the test.
• 9.5 All methods (A, B, C):
  • 9.5.1 If the test is used to determine whether the sample conforms to the product specification, after the pump has drawn the specified volume of sample through the filter membrane (which may not be 300 mL), manually stop (the pump, text missing at this point in the source, requires confirmation against the source standard (source-text extraction)), record and report the pressure and volume. Do not use equations (1) and (2).
  • 9.5.2 If during the test (pressure rise, text missing at this point in the source, requires confirmation against the source standard (source-text extraction)) reaches 105 kPa, or if the sample is known to be severely contaminated by particulate matter, then before the next test begins, follow the manufacturer's instructions (clean/replace, text missing at this point in the source, requires confirmation against the source standard (source-text extraction)) the pulse damper assembly.

9. Qualitative and Quantitative Determination and Calculation Formulas

• Use equation (1) or equation (2) to calculate the filter blocking tendency of the sample (FBT). Equation (1) applies when 300 mL of sample passes through the filter membrane and the pressure is below 105 kPa; equation (2) applies when the pressure reaches 105 kPa and the test is stopped.
• Equation (1): (formula content missing at this point in the source, requires confirmation against the source standard (source-text extraction))
• Equation (2): (formula content missing at this point in the source, requires confirmation against the source standard (source-text extraction))
• Explanation of symbols (visible portion of the source):
  • 300 mL the pressure reading reached at the end of the test after the sample passes through the filter membrane, in kilopascals (kPa);
  • the volume of sample that has passed through when the pressure reaches 105 kPa, in milliliters (mL).
• 12.2.1 Correction of bias between the results determined by method A and method B:
  • "B"=0.9133×A ……(3)
  • "A"=1.097×B ……(4)
  • Where: "B"—the predicted value of the result of method B obtained from the result of method A; A— the result obtained by method A, calculated by equation (1) or equation (2); "A"—the predicted value of the result of method A obtained from the result of method B; B— the result obtained by method B, calculated by equation (1) or equation (2).
• 12.2.2.1 Reproducibility between the predicted value of the result of method B obtained from the result of method A and the measured result of method B (see the "B" column in Table 1):
  • R"B"y=√[0.03697("B")^3.2+0.003131(B)^3.2] ……(5) (the formula layout in the source appears to have source-text extraction noise, requires confirmation against the source standard (source-text extraction))
• 12.2.2.2 Reproducibility between the predicted value of the result of method A obtained from the result of method B and the measured result of method A (see the "A" column in Table 1):
  • R"A"y=√[0.003769("A")^3.2+0.04434(B)^3.2] ……(6) (the formula layout in the source appears to have source-text extraction noise, requires confirmation against the source standard (source-text extraction))
  • Where: A— the result obtained by method A, calculated by equation (1) or equation (2); B— the result obtained by method B, calculated by equation (1) or equation (2); "B"—the predicted value of the result of method B obtained from the result of method A, calculated by equation (3); "A"—the predicted value of the result of method A obtained from the result of method B, calculated by equation (4).
• Appendix C: Relationship between the filter determination results of method C and method ASTM D6426:
  • C.2 Degree of agreement among method A, method B and method C: Because these methods use filters of different porosities, there are no reliable bias data.
  • C.3 Degree of agreement between the results of method C and method ASTM D6426 filter method:
    • C.3.1 For (content missing at this point in the source, requires confirmation against the source standard (source-text extraction)), the bias correction described in ASTM D6708 cannot improve the agreement of the filter determination results from method C and method ASTM D6426. For certain samples, there is bias caused by sample characteristics (see the definition in ASTM D6708).
    • C.3.2 For the sample types and property ranges studied, the reproducibility between the results of method C and method ASTM D6426 filter is:
      • Rc=0.03396×D^?+0.01157×C ……(C.1) (the formula exponent in the source appears to have source-text extraction noise, requires confirmation against the source standard (source-text extraction))
      • the result obtained from the ASTM D6426 filter determination; the result obtained by method C.

10. Precision

• 12.1 Precision:
  • 12.1.1 Overview: The precision of FBT all comes from a collaborative test project conducted at the same location from 2006 year 7 month 10 day to 12 day. Six instruments and six operators were used to test 11 blind samples, with two replicate tests per sample. The samples included marine fuel oil, automotive diesel, biodiesel, blends of automotive diesel and biodiesel, and gas oil. The precision was obtained statistically from the test results according to the ISO 4259 (ASTM D 6300) method using ADJ6300 D2PP software, and is given in 12.1.2 and 12.1.3. Table 1 presents the precision in tabular form. Because the precision was obtained from determination results at a single location, when comparing results obtained at different times and locations, the reproducibility data may not be applicable due to sampling, transportation, storage and environmental factors. When the difference between two results obtained at different locations does not exceed the published reproducibility, the two results are acceptable. When a dispute or concern arises regarding the FBT result of a sample, it is recommended that the parties take fresh samples at the storage location of a large number of test samples and test them locally; this can ensure that the same sample is tested by one or both parties, and that the precision described in 12.1.2 and 12.1.3 is applicable. Note: The viscosity range of the samples used to determine the precision is 2.0 mm²/s~4.6 mm²/s. Judge the reliability of the test results according to the following provisions (95% confidence level).
  • 12.1.2 Repeatability (r): The difference between two replicate results obtained by the same operator using the same instrument on the same sample shall not exceed the following value:
    • Method A: 0.1009X (exponent missing in the source, requires confirmation against the source standard (source-text extraction))
    • Method B: 0.0698X (exponent missing in the source, requires confirmation against the source standard (source-text extraction))
    • Method C: 0.0842X (exponent missing in the source, requires confirmation against the source standard (source-text extraction))
    • where X is the average of the two replicate results used for comparison.
  • 12.1.3 Reproducibility (R): The difference between two single and independent test results obtained by different laboratories, different operators, using different instruments, on the same sample shall not exceed the following value:
    • Method A: 0.2318X (exponent missing in the source, requires confirmation against the source standard (source-text extraction))
    • Method B: 0.0616X (exponent missing in the source, requires confirmation against the source standard (source-text extraction))
    • Method C: 0.1337X (exponent missing in the source, requires confirmation against the source standard (source-text extraction))
    • where X is the average of the two results used for comparison.
    • Note: In the collaborative test study to determine precision, the degrees of freedom for the reproducibility data of method A is 20; because the minimum requirement of degrees of freedom 30 is not met (according to the ASTM D6300 method), users should note that the actual reproducibility of method A may differ significantly from the determined R value.
• Table 1 Precision table (original table data, source-text extraction layout is rather disordered, the following is listed according to the legible content of the source, values require confirmation against the source standard (source-text extraction)):

(Note: The correspondence between the values in the above table and the columns is organized according to the source-text extraction original text; the column attribution of some values is doubtful and requires confirmation against the source standard (source-text extraction).)

11. Report

• 11.1 (the content here is missing in the source text, requires confirmation against the source standard (source-text extraction))
• 11.2 (the content here is missing in the source text, requires confirmation against the source standard (source-text extraction))
• 11.3 free water was found (see 9.1.4); report as "free water present, test not performed".
• 11.3.x When the test is stopped manually after the sample drawn reaches the specified volume, report the volume of sample drawn and the final pressure reading.
• 11.3.9 For all completed tests, report the following information:
  • the reference to this standard;
  • the method procedure used (A, B or C);
  • the type and full identification of the sample;
  • the result (FBT), to the nearest 0.01;
  • the volume of sample drawn, expressed in milliliters, to the nearest 10 mL;
  • the pressure at the end, expressed in kilopascals, to the nearest 5 kPa;
  • the temperature (see 9.1.2), expressed in ℃;
  • any deviation from the procedure specified in the method, as agreed or otherwise specified;
  • the date of the test.
• 11.4 For the case of (high starting pressure, the text here is missing in the source text, requires confirmation against the source standard (source-text extraction)), report the FBT result, and also report "high starting pressure".

12. Normative references

• GB/T 458—2008 Paper and board — Determination of air permeance
• GB/T 4756 Petroleum liquids — Manual sampling
• GB/T 27867 Petroleum liquids — Automatic pipeline sampling
• ASTM D6426 Determination of filterability of middle distillate fuels
• References:
  • [1] GB 252—2011 General diesel fuel
  • [2] GB/T 6540 Determination of color of petroleum products
  • [3] GB 19147 Automotive diesel fuel (V)
  • [4] GB/T 20828 Biodiesel for blending with diesel engine fuels (BD100)
  • [5] GB/T 25199 Biodiesel blend fuel (B5)
  • [6] SH/T 0047 Gas turbine liquid fuel
  • [7] SH/T 0356 Fuel oil
  • [8] (missing in the source text, requires confirmation against the source standard (source-text extraction))
  • [9] ASTM D (missing in the source text, requires confirmation against the source standard (source-text extraction))
  • [10] (missing in the source text, requires confirmation against the source standard (source-text extraction))
  • [11] (missing in the source text, requires confirmation against the source standard (source-text extraction))
  • The remaining reference entries (Lubricants, Test Methods for Petroleum Products, Agreement Between Two Test, Petroleum Product, IS…nent of the Expected Agree-, a Material, etc.) are source-text extraction fragments, requires confirmation against the source standard (source-text extraction).

13. Source and verification

This page is an AI translation of the available Chinese method card. Human verification is pending. It is not an official translation of the standard. Check the source standard and product certificate before use.

14. Quick Q&A reference