JG/T 148-2002Steel tube radiator (English PDF)

4.1 Classification

4.1.1 The radiator shall be divided into 300mm, 400mm, 500mm, 600mm, 900mm and 1200mm according to the center distance of the inlet and outlet of the same side.

1500mm and 1800mm.

4.1.2 The heat sink is divided into round tube column type, elliptical tube column type and elliptical tube overlapping type according to the structure type, and the codes are YZ, TZ and TD respectively.

4.2 Marking

Example.

The number of single-column columns is 3, the width is 100mm, the center-side inlet and outlet is 500mm, and the working pressure is 1.0MPa.

For. GYZ3-100/500-1.0.

5.1 Materials

5.1.1 Steel pipes shall be cold-rolled DC01 or other materials of equivalent performance and shall comply with the provisions of GB/T 5213.

5.1.2 The film head shall be cold-rolled DC03 or other materials of equivalent performance and shall comply with the provisions of GB/T 5213.

5.1.3 The material of the radiator threaded nozzle shall comply with the provisions of Q235B of GB/T 700.

5.1.4 The radiator coating shall be environmentally friendly non-metallic coating and shall comply with HG/T.2006.

5.2 Structure

The structure of the radiator is shown in Figure 1.

a) Round tube type radiator

b) elliptical tubular radiator

c) Single row elliptical tube lap type radiator

Figure 1 Schematic diagram of the heat sink structure

d) Double row elliptical tube lap type radiator Description.

L --- combined length;

H --- height;

H1---the same side inlet and outlet center distance;

B --- width.

Figure 1 (continued)

6.1 Working pressure

The working pressure of the radiator should be no more than 1.0MPa.

6.2 Single piece standard heat dissipation

The standard heat dissipation of the heat sink shall not be less than the requirements of Table 1, Table 2 and Table 3.

Table 1 The standard heat dissipation unit of a single-tube tubular steel pipe radiator is watt

Ipsilateral inlet and outlet Center distance H1/mm 300 400 500 600 900 1200 1500 1800 Width B/mm 65 23 29 36 41 57 74 90 107 100 33 40 49 58 77 100 123 146 137 39 50 60 71 96 126 155 184 Note. The take-over mode is the same side up and down, the excess temperature deltaT=44.5K.

Table 2 The standard heat dissipation unit of the elliptical pipe-column steel pipe radiator is watt

Ipsilateral inlet and outlet Center distance H1/mm 300 400 500 600 900 1200 1500 1800 Width B/mm 80 Elliptical tube Outer diameter/mm 50×25 32 43 54 63 87 114 142 171 60×30 38 52 65 76 104 137 171 206 Note. The take-over mode is the same side up and down, the excess temperature deltaT=44.5K.

Table 3 The standard heat dissipation unit of the oval tube lap type steel tube radiator is watt

Ipsilateral inlet and outlet Center distance H1/mm 300 400 500 600 900 1200 1500 1800 Width B/mm 62 27 32 38 43 57 74 90 107 84 38 45 54 65 88 115 143 170

Note 1. The outer diameter of the elliptical tube in the table is 50mm×25mm, and the way of taking over is the same side up and down, and the excess temperature is deltaT=44.5K.

Note 2. The widths in the table are single row elliptical pipe lap type and double row elliptical pipe lap type.

6.3 Material size

6.3.1 The wall thickness of the finished tube of the radiator shall be not less than 1.2mm; the wall thickness of the elliptical tube shall be not less than 1.5mm. Working pressure is 1.0MPa when the outer diameter is 60 mm × 30 mm, the elliptical tube wall thickness should be not less than 1.8 mm.

6.3.2 The wall thickness of the round tube type of the finished product of the radiator shall be not less than 1.0mm; the wall thickness of the elliptical tube type head shall be not less than 1.5mm.

6.4 Welding quality

6.4.1 The welding quality of the radiator shall comply with the provisions of GB/T 12467.3 and GB/T 19866.

6.4.2 The welding should be firm, the weld should be smooth and smooth, and there are no defects such as cracks, pores, penetration and burn through.

6.4.3 After welding, the heat sink should be flat, uniform and beautiful, without obvious deformation and distortion.

6.4.4 There shall be no free residual slag in the radiator after welding. The minimum equivalent diameter of the elliptical pipe lap type water flow channel shall not be less than 8mm.

6.5 Thread quality

6.5.1 The radiator interface shall be threaded and the thread shall be complete and shall be free from defects.

6.5.2 Radiator threaded nozzles shall be RP1/, RP, RP1.

6.5.3 Thread making accuracy should meet the requirements of GB/T 7306.1.

6.6 Coating quality

6.6.1 The surface coating of the radiator should be even and smooth, and should not leak or blister.

6.6.2 The thickness of the coating shall not be less than 80 µm.

6.6.3 The coating adhesion rating shall comply with the Class 2 requirements specified in GB/T 9286.

6.6.4 The impact resistance of the coating shall comply with the provisions of GB/T 1732.

6.7 Dimensions and limit deviation

6.7.1 The outer diameter of the elliptical pipe lap type header pipe shall not be less than phi40mm.

6.7.2 The limit deviation of the heat sink dimensions shall comply with the requirements of Table 4.

Table 4 Dimensional limit deviation unit is mm

Same side inlet and outlet center distance H1 height/H width B combination length L Basic size limit deviation basic size limit deviation basic size limit deviation basic size limit deviation 300<=H1< 500 ±2 500<=H1< 900 ±3 900<=H1<=1800 ±4 H1 (35~

100)

B<=100 ±3 L<=1000 ±4 B >100 ±4 L >1000 ±5

6.7.3 The shape tolerance of the radiator shall comply with the requirements of Table 5.

Table 5 Geometric tolerances in millimeters

project

Flatness verticality L<=1000 L >1000 L<=1000 L >1000 Shape tolerance <=4 <=6 <=4 <=6

7.1 Working pressure

7.1.1 The test pressure of the radiator shall be 1.5 times the working pressure.

7.1.2 The pressure of the radiator should be tested by water pressure or air pressure test on a special test bench; the accuracy of the pressure gauge should not be lower than Level 1.5, the range should be 2.5MPa.

7.1.3 The voltage regulation time should be 2min during the water pressure test, the radiator should not pass the leakage; the pressure regulation time should be 1min, the radiator no bubbles in the test tank are qualified.

7.1.4 The finished radiator should be tested by air pressure; if hydraulic pressure test is used, the water remaining in the inner cavity should be dried after the test.

7.2 Single piece standard heat dissipation

The heat dissipation test shall comply with the provisions of GB/T 13754. When the center of the inlet and outlet of the same side is 300mm <= H1 <= 600mm, check the length of the test sample combination shall be 10 pieces; when the center distance of the same side inlet and outlet is 900mm <= H1 <= 1800mm, the test sample combination length shall be it is 5 pieces.

7.3 Material size

7.3.1 The wall thickness of the finished steel pipe of the radiator shall be tested by a vernier caliper with an accuracy of 0.02 mm.

7.3.2 The wall thickness of the finished radiator head shall be checked by wall thickness micrometer or wall thickness gauge.

7.4 Welding quality

7.4.1 The welding quality of round tube and elliptical tube type radiators shall be verified by visual inspection.

7.4.2 The welding quality of the elliptical pipe lap type radiator shall be checked by visual inspection, and then the vernier caliper with an accuracy of 0.02 mm shall be used.

test.

7.5 Thread quality

The thread quality of the radiator interface shall be visually inspected and then inspected by a Class B thread gauge.

7.6 Coating quality

7.6.1 The surface quality of the coating shall be examined by visual inspection.

7.6.2 The thickness of the coating shall be inspected in accordance with the provisions of GB/T 4956.

7.6.3 Coating adhesion shall be tested in accordance with the provisions of GB/T 9286.

7.6.4 The impact resistance of the coating shall be tested in accordance with the provisions of GB/T 1732. The diameter of the steel ball on the punch shall be 20 mm, and the height of the weight shall be 500mm.

7.7 Dimensions and limit deviation

7.7.1 The diameter of the elliptical pipe lap type header pipe shall be checked by a universal gage with an accuracy of 0.02 mm.

7.7.2 The limit deviation of the heat sink dimensions shall be checked by a universal gage with an accuracy of 0.02 mm.

7.7.3 The shape tolerance of the radiator shall be checked by means of a square, a feeler gauge and a platform of not less than three stages.

8.1 Inspection classification

The radiator inspection is divided into factory inspection and type inspection.

8.2 Factory inspection

8.2.1 Each group of radiators shall pass the inspection after passing the inspection by the quality inspection department of the manufacturer.

8.2.2 The factory inspection shall be carried out in groups according to the items specified in Table 6.

Table 6 Test item list

Serial number inspection item factory inspection type inspection requirements test method remarks

1 Working pressure 〇〇 6.1 7.1

2 Monolithic standard heat dissipation - 〇6.2 7.2

3 Material Size - 〇6.3 7.3

4 Welding quality 〇〇 6.4 7.4 Factory inspection without water flow channel equivalent diameter 5 thread quality 〇〇 6.5 7.5 6 coating quality Surface quality 〇〇 6.6.1 7.6.1 Coating thickness - 〇6.6.2 7.6.2 Adhesion - 〇6.6.3 7.6.3 Impact resistance - 〇 6.6.4 7.6.4

7 Dimensions and limit deviation 〇〇 6.7 7.7 Factory inspection does not include lapped header tube diameter Note. "〇" is a mandatory item; "-" is a non-inspection item.

8.3 Type test

8.3.1 A type test shall be carried out in any of the following cases.

a) when new products are transferred or produced to trial production;

b) when the radiator is subject to major changes in the design, process or materials used;

c) when production is suspended for more than one year and then resumed;

d) every 4 years during continuous production;

e) When the factory inspection result is significantly different from the previous one.

8.3.2 Type inspection shall be carried out in accordance with the items specified in Table 6.

8.3.3 Type inspection shall be carried out according to the general inspection level I specified in GB/T 2828.1, using the normal inspection once or sub-sampling plan, inspection the acceptance quality limit of the inspection project shall comply with the provisions of Table 7.

Table 7 Inspection sampling plan

batch

Sample size

code

Sample size

Grand total

Sample size

Receive quality limit AQL Work pressure Center distance Thread quality Welding quality Material size Coating quality and others 1.0 4.0 6.5 15 Ac Re Ac Re Ac Re Ac Re 51~90 C the first second (5) (0 1) (0 1) (1 2) (twenty three) 91~150 D the first second (8) (0 1) (1 2) (1 2) (3 4) 151~280 E the first second (13) (0 1) (1 2) (twenty three) (5 6) Note. Ac-received number, Re-rejected number; the value in parentheses is the value of a sampling plan with normal test.

8.3.4 The standard heat dissipation of a single piece shall be checked from any one of the sampled samples. After the test, the standard heat dissipation of the single piece shall comply with the provisions of 6.2.

It is determined that the standard heat sink of the batch heat sink is qualified.

9.1 Mark

Each set of radiators should have a clear, strong manufacturer's logo in a prominent position.

9.2 User's Manual

Each batch of products should be accompanied by product samples and instructions for use. The instructions for use should comply with the provisions of GB/T 9969 and should include at least Column content.

a) work pressure;

b) heat dissipation characteristic formula;

c) resistance coefficient;

d) weight;

e) water capacity;

f) installation operation points;

g) The working environment of the radiator, applicable to water quality and usage requirements.

9.3 Certificate

Each set of radiators shall be accompanied by a product certificate and shall include at least the following contents.

a) the name of the manufacturer;

b) product name and model number;

c) the implementation of the standard number;

d) Inspection time, inspector marking and date of manufacture.

10.1 Packaging

10.1.1 The radiator package should be made of recyclable materials and should comply with the provisions of GB/T 191.

10.1.2 The radiator should be packaged without damage to the quality of the product.

10.1.3 Protective measures should be taken for the radiator interface threads.

10.2 Transportation

10.2.1 Rain and moisture proof measures should be taken when transporting radiators.

10.2.2 During transportation and handling, it should not be crushed by bumps and other heavy objects, and should not be mixed with chemicals that affect the coating.

10.3 Storage

The radiator should be stored in an air-dry warehouse, and should not be in contact with corrosive media. The stacking height should not exceed 2m, and the bottom should be firm.

The height is 100mm~200mm.

references

[1] GB/T 29044-2012 Heating and air conditioning system water quality