Some standard content:
GB186142002
Chapter 4 of this standard is mandatory, and the rest are recommended.www.bzxz.net
This standard is formulated with reference to the provisions of Part 9 (HFC227ea) Fire Extinguishing Agent 1.4.1 of ISO/FDIS14520-9 "Gas Fire Extinguishing System-Physical Properties and System Design" of the International Organization for Standardization. This standard is proposed by the Ministry of Public Security of the People's Republic of China. This standard is under the jurisdiction of the Third Sub-Technical Committee of the National Fire Protection Standardization Technical Committee. The drafting units of this standard are: Tianjin Fire Science Research Institute of the Ministry of Public Security, Zhejiang Chemical Research Institute, Zhejiang Yingguang Chemical Co., Ltd. The main drafters of this standard are: Zhuang Shuang, Hou Jingcheng, Jiang Weiliang, Wang Tiane, Wang Junqing, Xu Jinhe. This standard is entrusted to Tianjin Fire Science Research Institute of the Ministry of Public Security for interpretation. 557
National Standard of the People's Republic of China
Heptafluoropropane (HFC227ea) Fire Extinguishing Agent
Fire extinguishing agent--Heptafluoropropane (HFC227ea) GB18614—2002
This standard specifies the definition, requirements, test methods, inspection rules, marking, packaging, transportation and storage of heptafluoropropane (HFC227ea) fire extinguishing agent.
This standard applies to heptafluoropropane (HFC227ea) fire extinguishing agent. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T7376-1987 Determination of trace moisture in industrial fluoromethanes Karl Fischer method 3 Definitions
This standard adopts the following definitions.
HFC227ca heptafluoropropane (HFC227ea) should be named 1,1,1,2,3,3,3-heptafluoropropane according to the chemical system nomenclature of my country. According to the international general nomenclature of halogenated hydrocarbons, it is called HFC227ea. Specific meaning:
indicates that the difference between the sum of the substituted atomic weights of the carbon atoms at both ends is the smallest, that is, the most symmetrical (the symmetry order is a, b, c, d, etc.) indicates that the substituent form of the middle carbon atom is CHF-the number of fluorine atoms (i.e. 7 fluorine atoms)
the number of hydrogen atoms plus 1 (i.e. 1 hydrogen atom) the number of carbon atoms minus 1 (i.e. 3 carbon atoms) indicates hydrofluorocarbon
4 Requirements
The technical performance of heptafluoropropane (HFC227ea) fire extinguishing agent shall comply with the provisions of Table 1. Table 1
Purity/%
Acidity (in terms of HF)/(mg/kg）
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China on January 10, 2002 558
KANi KAca-
Implementation on August 1, 2002
5 Test method
5.1 Sampling
Water content/(mg/kg）
Evaporation residue/%
Suspended matter or sediment
5.1.1 Sampling cylinder (see Figure 1)
a) Material: stainless steel;
b) Design pressure: 1.5MPa;
c) Volume: about 380mL.
Needle valve for gas chromatography
5.1.2 Treatment of sampling cylinders
GB 18614--2002
Table 1 (end)
2222222222277277777772
Not visible
Before the first use, the sampling cylinders need to be washed with water and appropriate solvents (such as ethanol or acetone). After washing, dry them in a drying oven at 105-110°C with electric heating for 3-4 hours. While hot, evacuate the cylinders to an absolute pressure of no more than 1.3 kPa, and keep them at this pressure for 1-2 hours, then close the cylinder valve for sampling.
Before each subsequent sampling, the remaining heptafluoropropane (HFC227ea) sample in the cylinder must be emptied, and the cylinder must be evacuated for 1 hour under 1.3kPa. After a small amount of heptafluoropropane (HFC227ea) is filled, continue to evacuate for 1 hour to keep the sampling cylinder clean and dry. 5.1.3 Sampling method
Connect a dry stainless steel capillary to the outlet valve of the heptafluoropropane (HFC227ea) cylinder. The stainless steel capillary should be as short as possible. Slightly open the cylinder valve, release heptafluoropropane (HFC227ea), flush the valve and the connecting pipe for 1 minute, and then quickly connect the end of the connecting pipe to the valve of the sampling cylinder. Place the sampling cylinder on a bench scale (if necessary, the sampling cylinder can be immersed in an ice-salt bath), open the outlet valve of the HFC227ea cylinder, open the valve of the sampling cylinder, and pour HFC227ea into it. Determine the weight of the poured sample from the weight change indicated by the bench scale. After sampling, first close the valve of the sampling cylinder, then close the valve of the filling HFC227ea cylinder, and remove the connecting pipe. All tests should be liquid phase sampling. 5.2 Determination of purity
5.2.1 Instrument and determination conditions
5.2.1.1 Instrument
Gas chromatograph, equipped with a thermal conductivity detector (using hydrogen as carrier gas, the sensitivity to benzene should be better than 800mv·mL/mg). 5.2.1.2 Determination conditions
The determination conditions are shown in Table 2.
Detector
Chromatographic column
Stationary phase
Filling amount
Column temperature/C
Gas chromatograph
Thermal conductivity detector
GB 18614—2002
Detector temperature/ C
Vaporization chamber temperature/C
Stainless steel column, 2m long and 3mm inner diameter
Chromatographic silica gel (particle size: 0.15~~0.18mm): β, β-oxydipropionitrile = 100:5
About 4g/m
5.2.2 Determination steps and calculation method
Detector current/mA
Carrier gas flow rate/
(mL/min)
Injection volume
Liquid vaporization sample 2~3mL
5.2.2.1 Sampling
HFC227ea fire extinguishing agent can be sampled with a small steel cylinder or an air bag with a metal film lined on the inner wall. 5.2.2.2 Determination
After starting the gas chromatograph, adjust the chromatograph according to the conditions specified in 5.2.1.2. After the instrument stabilizes and meets the requirements, the purity of the sample can be tested. When sampling from a small cylinder, first connect the HFC227ea sampling cylinder to the sampling tube, put the cylinder down (to take liquid gasification sample), open the cylinder valve, let the HFC227ea exhaust for 1 to 3 seconds, use a glass syringe to draw 2 to 3 mL of HFC227ea sample, inject it into the chromatograph, and use the peak area method to calculate the purity X (%) according to formula (1): An7e ×100
Where: A227ea-
HFC227ea peak area, mm; ZA,——the sum of the peak areas of each component except the air peak, mm2. 5.2.3 Determination results and allowable deviation
Take the arithmetic mean of the three parallel determination results as the determination result. The absolute deviation of each determination should not exceed 0.05%. 5.3 Determination of acidity
5.3.1 Reagents and instruments
5.3.1.1 Standard hydrochloric acid titration solution: concentration c(HCl) 0.0100 mol/L. 5.3.1.2 Methyl red indicator solution: 1 g/L ethanol solution. 5.3.1.3 Scale: weighing 2 kg, sensitivity below 1 g. 5.3.1.4 Graduated pipette: 0.1 mL (minimum graduation value 0.005 ml.). 5.3.2 Determination steps
...(1)
Add 10 drops of methyl red indicator solution (1 g/L) to 300 mL of boiled and cooled distilled water, and adjust the solution to light orange with standard hydrochloric acid titration solution Lc (HCl) - 0.0100 mol/L, as the blank solution. In a 250mL conical flask, add 0.25mL of standard hydrochloric acid titration solution [c(HCl)=0.0100mol/L] and 100mL ofBlank solution, this solution is used as the standard solution equivalent to 1mg/kgHF in the sample (this solution is rose red). Add 100mL of blank solution to another 250mL conical gas washing bottle, and pass about 50g of heptafluoropropane (HFC227ea) sample into it, bubbling and absorbing for more than 20min, and weigh the sample weight by reduction method. After ventilation, shake the solution in the bottle, fully wash the bottle wall above the liquid surface, then observe the color of the solution and compare it with the standard solution. The color of the sample solution should be lighter than the standard solution, which is qualified.
5.4 Determination of moisture
The determination of moisture shall be in accordance with the provisions of GB/T7376. 5.5 Determination of evaporation residue
5.5.1 Principle
KANi KAca-
GB18614—2002
Evaporate the sample, weigh the mass of the high boiling point residue, and obtain the evaporation residue content. 5.5.2 Reagents, instruments and devices
5.5.2.1 Cleaning liquid: dichloromethane (analytical grade). 5.5.2.2 The evaporator consists of a weighing tube and an evaporating tube, see Figure 2. 5.5.2.3 Constant temperature water bath.
5.5.2.4 Electric heating blast drying oven: can adjust to 105°C ± 2°C. Evaporating tube (content 800mL)
500mL mark
Weighing tube (mass about 15g)
Constant temperature water sugar
Figure 2 Evaporator test device
5.5.3 Determination steps
After drying the weighing tube in an electric heating blast drying oven at 105°C ± 2°C for 30 minutes, cool it in a dryer, weigh it to 0.1mg, and connect it to the evaporating tube. Weigh about 800g of the sample cooled to a non-boiling state into the evaporator, immerse part of the weighing tube in a constant temperature water bath to evaporate the sample, and adjust the temperature of the constant temperature water bath so that the sample evaporates completely in 1.5~2.0h. After the sample vaporizes, add 10mL of cleaning liquid into the evaporator, place the weighing tube in a constant temperature water bath at about 90℃, and evaporate the cleaning liquid. After vaporization, dry the weighing tube in an electric heating blast drying oven at 105℃±2℃ for about 30min, cool it in the dryer, and weigh it to 0.1mg. 5.5.4 Calculate the evaporation residue Y (%) according to formula (2): Where: mo-the mass of the weighing tube, g;
the mass of the weighing tube after the sample is vaporized, g; m
the mass of the sample, g.
5.6 Determination of suspended matter or sediment
Take 10 mL of non-boiling cooled sample and place it in a test tube with an inner diameter of about 15 mL. Wipe off the frost or moisture attached to the outer wall of the test tube and observe from a horizontal perspective whether there is turbidity or sediment. 6 Inspection rules
6.1 Inspection categories and items
6.1.1 Factory inspection
Purity, acidity and moisture are factory inspection items. 6.1.2 Type inspection
All items specified in Chapter 4 of GB 18614--2002 are type inspection items. Product type inspection should be carried out in any of the following situations: a) When the product is finalized for trial production or when the old product is transferred to another factory for production; b) During formal production, if there are changes in raw materials or processes; c) During formal production, inspection should be carried out once a year; d) When production is resumed after suspension for more than one year; e) When unqualified items appear in the results of the factory inspection of the product; f) When the national product quality inspection and supervision agency proposes a requirement for type inspection. 6.2 Group, Batch
A batch is a homogeneous substance produced by feeding the processing equipment at one time. A group is a product produced under the same environmental conditions, using the same raw materials and processes, including one or more batches. 6.3 Sampling
6.3.1 Samples for type inspection should be taken from products that have passed the factory inspection. 6.3.2 For sampling by "group" and "batch", samples of not less than 2kg should be taken at any time. 6.4 Determination rules
The results of factory inspection and type inspection must meet the technical requirements specified in Chapter 4 of this standard. If any one of them does not meet the requirements of this standard, it shall be judged as an unqualified product.
7 Marking, packaging, transportation and storage
7.1 This product is packaged in steel cylinders. The outer surface of the steel cylinders shall be clearly and firmly marked with the words "HFC227ea fire extinguishing agent". Each bottle of product shall be accompanied by a product certificate. The certificate shall indicate the product name, net weight, batch number, standard number, production date, factory name, etc. 7.2 The filling of HFC227ea fire extinguishing agent steel cylinders shall be carried out in accordance with the relevant provisions of Chapter 7 of the "Regulations on Gas Cylinder Safety Supervision" issued by the State Administration of Quality and Technical Supervision [2000] No. 250. The filling coefficient shall not exceed 1.15kg/L. 7.3 Steel cylinders containing HFC227ea fire extinguishing agent should be handled with care during transportation. Throwing, sliding, rolling and bumping are strictly prohibited. 7.4 Steel cylinders containing HFC227ea fire extinguishing agent should be stored in a cool and dry place, not near heat sources, and strictly prohibited from being exposed to rain, sun and corrosive substances.
7.5 Empty or full bottles should be placed neatly and equipped with cylinder caps. When placed upright, they should be properly fixed; when placed horizontally, the head should face one direction, and the stack height should not exceed five layers.
iKANiKAca-4 Determination rules
The results of factory inspection and type inspection must meet the technical requirements specified in Chapter 4 of this standard. If any one of them does not meet the requirements of this standard, it shall be judged as an unqualified product.
7 Marking, packaging, transportation and storage
7.1 This product is packaged in steel cylinders. The outer surface of the steel cylinders shall be clearly and firmly marked with the words "HFC227ea fire extinguishing agent". Each bottle of product shall be accompanied by a product certificate. The certificate shall indicate the product name, net weight, batch number, standard number, production date, factory name, etc. 7.2 The filling of HFC227ea fire extinguishing agent steel cylinders shall be carried out in accordance with the relevant provisions of Chapter 7 of the "Regulations on Safety Supervision of Gas Cylinders" issued by the State Administration of Quality and Technical Supervision [2000] No. 250. The filling coefficient shall not exceed 1.15kg/L. 7.3 Steel cylinders containing HFC227ea fire extinguishing agent should be handled with care during transportation. Throwing, sliding, rolling and bumping are strictly prohibited. 7.4 Steel cylinders containing HFC227ea fire extinguishing agent should be stored in a cool and dry place, not near heat sources, and strictly prohibited from being exposed to rain, sun and corrosive substances.
7.5 Empty or full bottles should be placed neatly and equipped with cylinder caps. When placed upright, they should be properly fixed; when placed horizontally, the head should face one direction, and the stack height should not exceed five layers.
iKANiKAca-4 Determination rules
The results of factory inspection and type inspection must meet the technical requirements specified in Chapter 4 of this standard. If any one of them does not meet the requirements of this standard, it shall be judged as an unqualified product.
7 Marking, packaging, transportation and storage
7.1 This product is packaged in steel cylinders. The outer surface of the steel cylinders shall be clearly and firmly marked with the words "HFC227ea fire extinguishing agent". Each bottle of product shall be accompanied by a product certificate. The certificate shall indicate the product name, net weight, batch number, standard number, production date, factory name, etc. 7.2 The filling of HFC227ea fire extinguishing agent steel cylinders shall be carried out in accordance with the relevant provisions of Chapter 7 of the "Regulations on Safety Supervision of Gas Cylinders" issued by the State Administration of Quality and Technical Supervision [2000] No. 250. The filling coefficient shall not exceed 1.15kg/L. 7.3 Steel cylinders containing HFC227ea fire extinguishing agent should be handled with care during transportation. Throwing, sliding, rolling and bumping are strictly prohibited. 7.4 Steel cylinders containing HFC227ea fire extinguishing agent should be stored in a cool and dry place, not near heat sources, and strictly prohibited from being exposed to rain, sun and corrosive substances.
7.5 Empty or full bottles should be placed neatly and equipped with cylinder caps. When placed upright, they should be properly fixed; when placed horizontally, the head should face one direction, and the stack height should not exceed five layers.
iKANiKAca-
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.