other information
drafter:Wang Yunfei, Chen Tiangui, Yu Zhengming, Xu Yanrong
Drafting unit:Guangzhou Electric Science Research Institute, Zhejiang Dongyang Refrigeration Parts Factory
Focal point unit:National Household Appliance Standardization Center
Proposing unit:General Business Department of China Light Industry Federation
Publishing department:China Light Industry Federation
Some standard content:
Classification number Y61
Regulation number 9500--2001
Light Industry Standard of the People's Republic of China
QB/T2533-2001
Pipe fittings for air conditioners
Published on November 15, 2001
China Light Industry Federation
200205-01Implementation
GB/T2533-2001
This standard is a performance requirement standard for indoor air conditioning pipe fittings products formulated in accordance with the relevant provisions of the standards for refrigeration compressors and air conditioning heat exchangers. This standard is issued by the General Business Department of the China Light Industry Federation. This standard is issued by the National Household Appliance Calibration Center! Drafting units of this standard: Guangzhou Lianglu Science Research Institute, Xinzheng Province Dongyang Refrigeration Accessories! . This standard is mainly drafted by Yunfei, Tiangui, Zhiming and Xu Yanzi KbNrKa
Light Industry Standard of the People's Republic of China
Piping parts for air conditioners
QB/T2533-2001
This standard specifies the product classification, technical requirements, test methods, registration rules, marking, packaging, transportation and storage of piping parts for room air conditioners using refrigerant R22 (including type 3 or 4 filters, filters, storage devices, eliminators, etc.).
This standard uses various types of piping components for various types of air conditioners specified in GB 7725-1996 (Room Air Conditioners).
2 Referenced Standards
The following standards contain the following documents, which constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All parts of the standard will be revised, and the parties who use this standard should explore the possibility of using the latest version of the standard:
GB 191—20MM
Packaging storage diagram
GB/T2423.3-1993 China Industrial Electronics-Products Environmental Test Specification Test Ca, Constant Heat Test Method GB282B-1987 Batch-by-batch inspection variable juice number sample program float and pull sample table (applicable to two consecutive batches of rush> GRT28291987 Periodic inspection count price program push sample table (later used for two production process stability inspection) GB/7725-1996 Room regulator
This standard adopts the following definitions. .
.3.1 Piping fitting
Pipe fittings are functional performance piping fittings in refrigeration systems. 3.2 Special-shaped three joints or special three joints on multi ioint A three-way or multi-way refrigeration system is a device that connects three or more pipes of different diameters or specifications to the refrigerant in the refrigeration system.
3.3 Filter
A filter is a component that removes refrigerant and residual substances from the refrigeration system. 3.4 Liquid accumulator
A liquid accumulator is a pipe component that stores excess refrigerant in the refrigeration cycle and is used for gas-liquid separation. 3.5 Muffler
A muffler is a pipe component that absorbs the noise of the refrigeration system. Classification
4. 1 Product type
The structural type of the product is an integral type.
Approved by China National Light Industry Council on November 15, 20011
Implemented on May 1, 2002
4.2 Type
QB/T -2533—2001
Design unit naming
Product name code: Special-shaped tee or multi-purpose "CY" for filter "GO\
"ac" for circulator\
"\GX\
Example 1: The product is a liquid storage device, and the design unit is named 67-98-01, indicating 1CC67-98-01Example 2: The product is a silencer, and the design unit is named 56-97-01, indicating : GX56-97-01, 5 Technical requirements
5.1 General requirements
5.t.1 Pipe fittings shall comply with the requirements of existing standards and shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 5.1.2 The materials used for pipe fittings shall comply with the relevant standards and specifications. The materials that come into contact with refrigerants shall be strictly verified for their suitability before use:
5.2 Appearance requirements
5.2.1 The curved part of the pipe shall not have obvious wrinkles and deformation. 5.2.2 The surface of the pipe fittings shall be free of defects such as bruises, bruises, cracks, flagging, oxidation shedding, and scratches. 5.2.3 The surface of the coating shall not have obvious bubbles, flow marks, missing coating, primer outside, and unnecessary slope patterns. 5.3 Size requirements
Pipe fittings shall comply with the requirements specified in the drawings and technical documents approved in accordance with the prescribed procedures. 5.4 Performance requirements
5.41 Performance
Pipe fittings shall be inspected in accordance with 6.4, and the pressure inside the pipe shall be 2 times the maximum working pressure: within 3 minutes, the product shall not deform or leak.
5.4.2 Air tightness
Pipe fittings shall be inspected in accordance with 6.5, and the pressure inside the pipe shall be 1.5 times the maximum working pressure. Within 3 minutes, the product shall not have any gas leaking out.
5.4.3 Residual moisture content
If the pipe fittings are inspected in accordance with 6.6, the residual moisture content of the inner surface area shall not exceed 120mg/m2 5.4.4 Residual impurity content
Pipe fittings shall be inspected in accordance with 6.7, and the residual impurity content of the inner surface area of the pipe shall not exceed 100mg/m2. 5.4.5 After the product oil bleaching sample is tested according to the method of 6.8, check the appearance of the coating surface. No obvious pinholes are allowed. There shall be no more than 2 bubbles with a diameter of 0.5m~1mm within any 100m2 square surface of the main surface of the sample. No gas with a diameter of 1mm is allowed.
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5.4.6 Coating surface film sinking strength
QB/2533-2001
After the product paint sample is tested according to the method of 6.9, the number of source pancreatic shedding should not exceed 15%. Note: If other refrigerant core characteristics are required, such as residual moisture content, residual impurity content, mineral oil content, chlorine content, etc., they can be negotiated according to the technical properties and test methods of the application. 6 Test method
6. 1 Test conditions
6.1.1 Test environment conditions
a) Ambient temperature (20±5)
b) Relative humidity 45%~75%.
8.1.2 Main test instruments and meters used in the test: the minimum scale value of the length measuring instrument should not be greater than 20mmb) The precision of the instrument for measuring force should not be less than 1.5, and the minimum resolution value of the instrument for measuring temperature should not be greater than 7mmd) The resolution of the instrument for measuring quality should be ±0.5mg6.2 Appearance inspection
Appearance inspection: Under normal illumination, the product shall be tested one by one according to the customer's requirements of 52. 6.3 Dimension inspection
Dimension inspection: The outer diameter, inner diameter, length and other dimensions shall be measured according to the requirements of 53. 6.4 Scherrer test
Fill the pipe with water and slowly raise it to the test pressure to observe whether the product is deformed and leaking. 0.5 Airtightness test
Fill the pipe with dry air or air, and put the product into the water (see Figure 1). Slowly increase the specified test pressure and observe whether there are bubbles in the product. Note: The test method of E factory inspection can be other equivalent methods. 6.6 Residual moisture content monitoring
Figure 1 Airtightness test diagram
Test object
This standard stipulates that there are direct measurement method and indirect measurement method for residual moisture content test. If there is any dispute, indirect measurement shall be used.
6.6.1 Direct measurement method
The product is taken out of the sealed chamber (set) and placed in a (125 above 5): explosion box-drying. The company must ensure that the product is fully dried for a sufficient time. 3
0B/2533—2001
The weight after cooling is determined, and the weight difference before and after the test is the residual water content of the product. 6.6.2 Direct measurement Put the pipe fittings into the moisture collection device (see Figure 2) and inject nitrogen (or ice and alcohol) into the cooling box to make the temperature inside reach -% or below. Put the product into the drying box, adjust the temperature inside the drying box to (125±5), and reduce the pressure inside the vacuum box to no more than 3.3Pa (applied pressure) for 2.0h. The water content collected is the residual water content of the product.
Vacuum pressure gauge
Pressure adjustment
+hot description
Description 2 Residual moisture content test device schematic diagram 6.7 Residual impurity content test
Nitrol (or dry
Wine extraction)
This standard stipulates that the residual impurity content test has direct measurement method and direct measurement method. If there is any dispute, the indirect measurement method shall be used. 6.7.1 Direct measurement method
Use effective detergent to flush 5mlm in the dried pipe parts. The flushing should be guaranteed to effectively remove impurities. Dry the pipes in a drying oven at (125±5)℃. Measure the quality after cooling. The difference between the quality before and after the test is the residual impurities contained in the product.
6.7.2 Measurable plate method
After drying, use effective detergent to perform pressure flushing for 5m in the circuit parts. The flushing pressure must be guaranteed to effectively flush away the dirt. Use neutral filter cleaning liquid, cut the coal in the lower coal box before and after falling (70±5) and measure the mass. The mass of the filter paper before the test is the residual impurity content of the product. 6.9 Surface coating test
Carry out wet heat test according to /2423.3. The test period is 6h. Take a 100m×100mm sample of the product paint board. Clean and remove the impurities before the test. The test station conducts appearance inspection. The result should meet the requirements of 5.4.5. 6.9 Gel film drop test
Randomly take 104×100 samples from the surface of the product paint sample board, use a new single-sided guide paper to cut 1:1 through each side, deep into the parallel cut of the substrate. Use zinc oxide tape to stick it firmly, and then cut it off. According to the scratch standard, the integer of the membrane falling off is compared to 100. If the membrane of each small grid is less than 70%, it is considered to be falling off. After the test, check the falling off situation, and the result should meet the requirements of 5.4.6. YkoNrKa-
了·Inspection rules
GB/T2539—2001
7.1 The inspection of road products is divided into factory inspection and type inspection. 7.2°Factory inspection
7.2.1 The mandatory inspection items of factory inspection are the first item in Table 1. The mandatory inspection items of products with welding are the first and fourth items in Table 1.
The sampling inspection items of factory inspection are the second, fifth and sixth items in Table 1. The sampling plan is determined by the manufacturing quality inspection department in accordance with GB2828.
Pine test
Acid resistance
Gas change
Press the remaining part of the quantity
Remaining quality
Agricultural coating
Paint mold A focus
Technical requirements
Type inspection
When the product has any of the following conditions, the type inspection shall be carried out. 7.3. 1
9) When the new product or the product is easy to transfer to the factory for trial design and finalization of the design plan b) When the design, technology or materials have changed, which may affect the product performance:) When the production is stopped for one year and then resumed:
d) When the batch production is close, not less than once a year: When the factory inspection result is significantly different from the result of the last type inspection. Test method
7.3.2 Type inspection items, technical requirements and test methods are as specified in Table 1, and the unqualified classification of type inspection items is as specified in Table 2
Inspection items
Impact strength
Residual content
Residual impurity content
Pre-installation knowledge
Film adhesionwww.bzxz.net
Eight unqualified categories
Classification of this category
R category is not allowed
Category I category
7.3.8 In accordance with the requirements of QB/T2829, the sampling method of type inspection shall be implemented, and the discrimination level, unqualified quality level, sample size and qualified judgment number shall be as specified in Table 3. 5
Emulsion water
Three samplings
Secondary,
QB/T25332001
8 Marking, packaging, transportation, storage
Class A unqualified
RoL-55
Does not contain quality water
Class B small specification
RQL-BU
Heavy category unqualified
RQ1,=[D0
8.1 The product name, model, standard number, manufacturer name, manufacturing date (or serial number or production batch number:) shall be marked on all parts or each package of products in obvious places.
8.2 After production and cleaning, dust-proof, wrist-proof and airtight packaging shall be carried out. 3.3 The product packaging shall adopt measures such as anti-slip, anti-slip, and anti-collision. The packaging display mark shall comply with GB [9!
a.4 The product should be placed in a place with strong abrasive gas, adverse conditions, or in a warehouse. -tTY KbNY KA-
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