This standard specifies the terms, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of double-coil ultra-high temperature sterilizers. This standard applies to double-coil ultra-high temperature sterilizers (hereinafter referred to as "sterilizers") for sterilizing milk, dairy products and low-viscosity fluid foods. QB/T 1825-1993 Double-coil ultra-high temperature sterilizer QB/T1825-1993 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Double-coil ultra-high temperature sterilizer
1 Subject content and scope of application
QB/T 1825--1993
This standard specifies the terms, product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, etc. of double-coil ultra-high temperature sterilizer.
This standard applies to double-coil ultra-high temperature sterilizer (hereinafter referred to as "sterilizer") for sterilizing milk, dairy products and low-viscosity fluid foods. 2 Reference standards
GB150 Steel pressure vessels
GB/T191 Pictorial symbols for packaging, storage and transportation
GB/T3323 Radiography and quality grading of steel fusion-welded butt joints GB/T6388 Transport packaging and delivery marks
GB12073 Safety and hygiene of dairy equipment
JB/T8 Product labels
QB/T842.8 General technical conditions for light industrial machinery weighing instruments Packaging QB/T1823
Method for compiling dairy machinery models
QB/T1826 Centrifugal sanitary pumps
ZBJ50004 Determination of sound pressure level of noise from metal cutting machine tools 3 Terminology
3.1 Double-sleeved coil: Two pipes of different diameters are sleeved together and processed into a coil structure with consistent concentricity. 3.2 Ultra-high temperature: a process for sterilizing milk, the temperature standard is 135-150℃; the time standard is 2-8s. 3.3 Sterilization: completely kill pathogens and inhibit the development of other microorganisms without damaging the flavor and nutritional value of milk. 3.4 Sterilization: after heating, the milk is completely free of bacteria or live spores. 3.5 Sterilization efficiency: expressed as the logarithm of the ratio of the number of spores before and after sterilization. SE value is used to evaluate the effect of ultra-high temperature sterilization. SE--sterilization efficiency;
where:
-spores/mL,
initial spore number——
final spore number-spores/mL.
3.6 Single pump: only one pump is installed in the whole machine. 3.7 Double pump: two pumps need to be installed in the whole machine. 3.8 Extension pipe: increase the length of the cooling section coil. 4 Product classification
4.1 Product varieties, types and specifications
SE = Ig number of spores
Starting spore number
Approved by the Ministry of Light Industry of the People's Republic of China on July 29, 1993 and implemented on March 1, 1994
QB/T 1825--1993
According to the nominal flow rate, there are two types: 2kL/h and 4kL/h. b.
According to the steam heating control method, there are two types: manual control type and automatic control type (indicated by Z); according to the number of feed pumps, there are two types: single pump and double pump (indicated by S); c.
According to the length of the cooling section coil, there are two types: ordinary type and extended pipe type (indicated by J). d.
4.2 Model representation method
The model is compiled in accordance with QB/T1823 and combined with product characteristics. S
Performance specifications and structural dimensions shall be in accordance with Table 1. 4.3
RSCG01-2bZxz.net
RSCG01-2Z
RSCG01-2S
RSCG01-2SZ
RSCG01-2SJ
RSCG01-2SZJ
RSCG01-4
RSCG01-4Z
RSCG01-4S
RSCG01-4SZ
RSCG01-4SJ
RSDG01-4 SZJ
5 Technical requirements
Nominal flow
Control mode
Extension pipe
-Double pump
Nominal flow
Casing type
Ultra-high temperature
Sterilization, sterilization
Dairy machinery
Ling tube length
Ordinary type
Extension pipe
Ordinary type
Extension pipe
Sterilizers should be manufactured in accordance with the provisions of this standard and in accordance with the drawings and technical documents approved by the prescribed procedures. 5.1
The minimum flow of the sterilizer shall be as specified in Table 2.
Nominal flow rate/(kL/h）
Number of pumps/set
Overall dimensions L×b×h
1314X925X1650
1 714X1 225X1 650
1314X925×1650
1 714X1 225×1 650
1314X925×1650
1 714×1 225X1 650
1800×1400×1800
2 000×1 400X1 800
1 800X1400X1800
2000X1400X1800
1 800X1 400 ×2 200
2000×1400×2200
Minimum flow rate/(kL/h)
QB/T1825—1993
5.3 When the sterilizer is operated at ultra-high temperature, the sterilization efficiency SE value should be greater than 6.4. 5.4 When the sterilizer is operated at a feed temperature of 4-10℃ and the steam pressure is 0.8MPa, the steam consumption is not more than 0.15kg steam/kg material, and the energy saving efficiency is 45% for one-way (preheating) and 90% for two-way (preheating and cooling). 5.5 The material of the pressure vessel should be selected in accordance with the provisions of GB150, and the material in contact with the material should be in accordance with the provisions of GB12073. 5.6 The welding rod or welding wire shall be of a grade not lower than the material strength of this product. 5.7 The radiographic flaw detection of the longitudinal weld of the high-temperature cylinder shall meet the GB/T3323 Grade III standard. 5.8 The transition of the material pipeline shall be smooth, and there must be a certain radius, no dead angle is allowed, and it shall be able to withstand the 6MPa water pressure test, and no leakage or deformation shall occur.
5.9 The welding seam of the double-set coil shall be flat, and the number of weld repairs shall not exceed 2 times. 5.10 The maximum displacement of the combined coil of the whole machine shall not exceed 10mm. 5.11 The matching feed pump (centrifugal sanitary pump) shall comply with the provisions of QB/T1826. 5.12 When the whole machine is in use, the noise shall not exceed 85dB(A). 5.13 The instrument and other accessories shall comply with the relevant national standards and be accompanied by a certificate of conformity. 5.14 The sterilizer shall be equipped with a circulating washing device for easy cleaning to ensure the safety and hygiene of food production. It is stipulated that under normal operating conditions, the continuous working time is one shift (6h). At the end of each shift, CIP cycle washing must be used. A detergent without chloride ions should be selected. The detergent concentration should not exceed 2% and the temperature should not exceed 80℃.
5.15 The appearance should be smooth and bright, without obvious scratches. 5.16 The reliability test time of the product after assembly shall not be less than 6 hours. 5.17 After the whole machine is tested, it should be kept clean and free of obvious impurities. 5.18 Under the condition that the user avoids the storage and use rules, if the sterilizer cannot work normally within one year from the date of manufacture due to manufacturing quality problems, the manufacturer shall repair or replace it free of charge (excluding wearing parts). 6 Test method
6.1 Flow test
6.1.1 Instrument: glass rotor flowmeter (600～6000L/h), accuracy level 1.5. 6.1.2 Medium: clean water (chloride ion content does not exceed 25mg/kg). 6.1.3 Test steps; For single pump test, see Figure 1. Connect a flow meter to the discharge port, open the back pressure valve to the maximum, start the feed pump, and read the indication when the flow rate is stable. For double pump test, see Figure 2. Remove the U-shaped pipe at the bottom of the machine, connect another feed pump, and perform the rest according to the single pump test steps.
Outlet water
Feed pump
Flow meter
Back pressure valve
6.2 Weld inspection
Feed pump
Feed quinoa
Perform according to the relevant provisions of GB150.
6.3 Pressure test
QB/T1825-
—1993
Flow meter
Back pressure valve
6.3.1 High temperature heater pressure test: As shown in Figure 3, connect the condensate water connection pipe at the bottom of the high temperature barrel with the outlet pipe of the pressure test pump, start the pressure test pump, and when the high temperature barrel is full of water, close the exhaust stop valve to slowly increase the pressure to 1.05MPa and maintain it for 10 minutes, then reduce the pressure to 0.80MPa and maintain it for 30 minutes. Visual inspection shows no leakage or abnormal deformation. Pressure gauge (0-2.5MPa)
Exhaust stop
Pressure gauge (0-2.5MPa)
Test pressure pump
Drainage stop
Commercial temperature heater
Container bracket
Figure 3 High temperature heater pressure test device
6.3.2 Material coil pressure test: As shown in Figure 4, connect the feed pump pipe to the outlet pipe of the pressure test pump, remove the temperature package and back pressure valve at the upper end of the high-pressure cylinder, plug each with a plug, start the pressure test pump, raise the pressure to 6MPa, maintain for 20 minutes, and visually observe no leakage. 6.4 Feed pump seal leakage test
Can be carried out simultaneously with the flow test. Within a period of not less than 10 minutes, collect the amount of water leaked from the pump seal for calculation. 6.5 Noise test
Perform in accordance with the provisions of ZBJ50004.
6.6 Combined coil displacement test: As shown in Figure 5, use a ruler to lean against any side of the outer diameter of the combined coil to measure the maximum displacement between each coil.
7 Inspection rules
7.1 Factory inspection
Pressure gauge (0~10MPa)
QB/T 1825—1993
Test pressure pump
Feeding pump pipe
Temperature package interface plug
Figure 4 Material coil pressure test device
Back pressure valve interface plug
Maximum displacement value
Figure 5 Schematic diagram of combined coil displacement value determination
Perform each unit according to the requirements of 5.1, 5.25.5, 5.7, 5.8, 5.9, 5.10, 5.11, 5.12, 5.13, 5.15, 5.17. After passing the inspection, the competent quality inspection department shall issue a certificate of conformity before the unit can leave the factory. 7.2 Type inspection
It shall be conducted in any of the following cases:
New products are put into production;
Major changes in design, process or materials used may affect product performance; b.
Products are put into production again after being discontinued for more than one year;
In normal production, it shall be conducted every two years; When the national quality supervision agency proposes the requirement of type inspection. 7.3 Type inspection items and sampling rules
Inspection shall be conducted in accordance with all the contents in the technical requirements of this standard. Sampling rules shall be classified according to the production scale of the manufacturer, see Table 3. 7.3.2
Production volume per batch
Number of random inspections
More than 100
7.4 Type inspection judgment method
QB/T 1825-1993
According to the provisions of Article 7.3.1, all of them are qualified. If the inspection fails, double sampling shall be conducted. If the inspection fails, the batch shall be deemed unqualified. 8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 Product marking
8.1.1.1 The sterilizer must have a label fixed in an obvious position. The type and size of the label shall comply with the provisions of JB/T8. 8.1.1.2 The content of the product label shall include: a.
Manufacturer name,
Product model and name;
Main parameters of the product;
Manufacture number,
Manufacture date.
The packaging mark
should comply with the provisions of GB/T191 and GB/T6388, including: a.
The name and address of the shipping unit, the name and specifications of the product must be clearly stated according to the transportation regulations;
The number of products,
net weight and gross weight;
The size of the packaging box;
The date of manufacture;
Marks such as "handle with care" and "upward" on the lifting point. 8.2 Packaging
The packaging of the sterilizer should comply with the provisions of QB/T842.8. Each product should be accompanied by the following documents:
Product certificate;
Product manual;
Quality certificate (pressure-bearing components),
Packing list.
8.3 Transportation
The packaging box of the sterilizer is not allowed to collide during transportation. 8.4 Storage
It should be stored in a clean and dry warehouse to avoid coexistence with chloride. Additional remarks:
This standard is proposed by the Technical Equipment Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Dairy Machinery Standardization Center. This standard is drafted by Ningbo Food Equipment Manufacturing Factory. The main drafters of this standard are Guo Jianing, Zhou Minhua, Shen Xugen, and Zhou Lianfang. From the date of implementation of this standard, the professional standard ZB/TY99022--1989 "Double-coil Ultra-high Temperature Sterilizer" issued by the former Ministry of Light Industry will be invalid.
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