GB/T 19447-2013Copper and copper-alloys seamless tubes with integral fins for heat exchanger (English PDF)

3.1 Categories

3.1.1 Grade, before finning status, specifications

3.1.1.1 pipe grades, finning former state specifications shall comply with the requirements in Table 1.

Table 1 pipe grade, status, size

Grade former state code finning Specifications/mm Wingless segment (Outer diameter D × wall thickness T) Finning section (Fin fin height Hf × number FPI (/ Inch) × Bottom thickness Tf) TU00 TU1 TU2 TP1 TP2 C10100 T10150 T10180 C12000 C12200 Soft annealed state (O60) Gently pull the state (H55) Drawing state (H80) (7 ~ 30) × (0.6 ~ 3.0) BFe5-1.5-0.5 BFe10-1-1 BFe30-1-1 C70400 T70590 T71510 Soft annealed state (O60) (10 ~ 26) × (0.75 ~ 3.0) HA177-2 HSn72-1 HSn70-1 HAs85-0.05 C68700 C44300 T45000 T23030 Soft annealed state (O60) (10 ~ 26) × (0.75 ~ 3.0) (0.3 ~ 3.8) × (11 ~ 56) × (0.4 ~ 2.5)

Note 1. The supply, both sides need to negotiate, can supply other grades and specifications of the pipe.

Note 2. Pipes finning after annealing can be carried out according to customer requirements.

3.1.1.2 Recommended common specifications, the main parameters in Table 2. Names of parts finned tube is shown in Figure 1.

Table 2 Recommended common specifications, the main parameters

Nominal Specifications mm Wingless segment the outer diameter D mm Wall thickness T mm Finning section Diameter Df mm Outer fin height Hf mm Outer wing fin Number of FPI / Inch Inner tooth height Rh mm Internal teeth the number N Internal teeth Helix angle beta (°) Bottom thickness Tf mm 25.32 × 1.18 25.32 1.18 25.32 0.9 46 0.36 45 35 0.64 25.32 × 1.18 25.32 1.18 25.32 0.6 46 0.36 52 35 0.64 18.92 × 1.13 18.92 1.13 18.92 0.6 46 0.36 45 42 0.64 18.92 × 1.13 18.92 1.13 18.92 0.9 46 0.36 45 42 0.64 16 × 0.65 16 0.65 16 0.3 26 0.15 8 43 >=0.5 15.88 × 1.1 15.88 1.1 15.88 0.9 40 0.25 38 40 0.55 19.05 × 1.15 19.05 1.15 19.05 1.45 26 - - - >=0.55 15.88 × 0.6 15.88 0.6 15.88 - - 0.3 60 25 0.5 12.7 × 0.6 12.7 0.6 12.7 - - 0.25 60 42 0.4 23.4 × 2.5 23.4 2.5 26 2.8 12 - - - 1.5 23 × 2.6 23 2.6 26 3.0 11 - - - 1.5 22 × 2.45 22 2.45 27 3.5 11 - - - 0.95 17 × 2.8 17 2.8 19 2.5 12 - - - 1.5 Note. The supply, both sides need to negotiate, we can supply other specifications, the parameters of the pipe.

Explanation.

T --- wingless segment wall thickness;

B --- Transition cone length;

FPI --- outer wing fin number (/ inch);

Hf --- outer fin height;

D --- wingless segment outer diameter;

N --- within the rack number;

beta --- internal teeth helix angle;

Rh --- high internal teeth;

Tf --- finning in bottom wall thickness;

Df --- finning segment outer diameter.

Figure 1 a schematic view of the finned tube Names of parts

3.1.2 Tag example

Products marked by product name, standard number, grade, before finning state, drawing number, size of the order of representation. Tag example as follows.

With TP2 manufactured before finning softening annealed state, wingless segment outer diameter of 19mm, a wall thickness of 1.25mm, a length 4750mm, Product Drawing No. K500B7-015 pipe marked.

Finned tubes GB/T 19447-TP2O60K500B7-015-phi19 × 1.25 × 4750

3.2 Chemical composition

Chemical composition of the pipe should be consistent with GB/T 5231 specified in the appropriate grade.

3.3 Dimensions and tolerances

3.3.1 an outer diameter and an outer diameter tolerance Wingless segment and the outer diameter of the outer diameter of the pipe tolerances shall comply with the provisions in Table 3.

Table 3 and the outer diameter of the outer diameter in millimeters tolerance

Predetermined diameter tolerance, not more than <=12.0 ± 0.05 > 12.0 ~ 18.0 ± 0.06 > 18.0 ~ 30.0 ± 0.08

3.3.2 Wall thickness and wall thickness tolerances

3.3.2.1 thinnest wall thickness of the pipe fin fragments not less than the specified minimum thickness (demand side, drawing a predetermined value). Fin height, the number of fins, Internal teeth helix angle, tooth height within the inner rack number by drawing provisions.

Wingless wall thickness of the pipe section 3.3.2.2 pipe wall thickness allow deviation is less than ± 8%.

3.3.3 Length and Length tolerance

3.3.3.1 pipe length and the length tolerances shall comply with the requirements of Table 4.

Table 4 pipe length and the length of tolerance in millimeters

Predetermined length tolerance, not more than <=6000 3 > 6000 ~ 100 004 > 10,000 to 180,006 3.3.3.2 from the pipe end to the first fin indentation measured length is determined by the supply and demand sides negotiated.

3.3.4 Cut slope

Cut pipe slope shall meet the requirements of Table 5.

Table 5 pipe cut slope requirements millimeters

Outside diameter tolerance, not more than <=16.0 0.25 > 16.0 0.016 × D

3.3.5 Straightness, roundness

Tube straightness, roundness should be consistent with GB/T 16866 in the corresponding provisions.

3.3.6 Unless otherwise specified, pipe cut end should be chamfered.

3.4 Mechanical Properties

Before finning, at room temperature, tube tensile strength (Rm) should meet the requirements in Table 6. When the user is required, total extension strength (Rt0.5), Vickers hardness (HV1) to comply with Table 6.

Table 6 tube at room temperature mechanical properties

Grade status

Tensile strength Rm

MPa

Min

Total extension strength Rt0.5 MPa Min Vickers hardness (HV1) TU00 TU1 TU2 TP1 TP2 Soft annealed state (O60) 205 62 40 ~ 75 Gently pull the state (H55) 250 205 70 ~ 110 Drawing state (H80) 290 - 90 ~ 120 BFe5-1.5-0.5 BFe10-1-1 BFe30-1-1 Soft annealed state (O60) 26085 16.0 to 30.0 1.1 3.6.3.2 according to GB/T 5248 Table 9 and aperture provisions regulating device sensitivity. In the eddy current testing facilities and equipment does not cause alarm Anti should pipe shall be deemed to meet the requirements of this standard.

3.6.3.3 Since visible indentation produce uncorrelated signals pipe can be hydrostatically pressure test conducted according to 3.6.2 or 3.6.1 Press test.

3.7 Thermal Performance

Pipe thermal performance by the demand and supply sides negotiated, provided the demand side requirements.

3.8 Residual Stress

Brass pipe should be residual stress testing.

Grain size 3.9

Grain size before finning the tube should not exceed the range of 0.01mm ~ 0.05mm.

Cleanliness 3.10

Inner tubes without annealing, the total amount of residual dirt outer surface is determined by the supply and demand sides negotiated; annealing within the pipe, the total amount of residual contamination of the surface should break Co specified in Table 10. It can also be measured separately inner and outer surfaces of the residue user demand.

Table 10 annealing pipe Cleanliness

Outside diameter/mm inner and outer surfaces of the total amount of residual dirt/(g/m2) <=16 <=0.25 > 16 <=0.32

3.11 Surface Quality

3.11.1 inner pipe, the outer surface should be clean. Allowed not to cause the pipe diameter and wall thickness exceeds the allowable deviation of scratches, pits pressed into objects, Ring marks and other defects.

3.11.2 pipe surface to allow a slight oil film on the processing, light oxidation color, dark.

Test Method 4

4.1 Chemical analysis methods

Analysis of the chemical composition of the pipe according to the provisions/T 482 of the GB/T 5121 or YS carried out according to the provisions of GB T 5121/arbitration get on.

4.2 Size measurement method

Pipe dimensions according to the provisions of GB/T 26303.1 performed; measurement method in accordance with the inner surface of the thread size of GB/T 26303.1 of Provisions, arbitration measured using a sectional screening method.

4.3 Mechanical tests at room temperature

Tensile testing pipe according to the provisions of GB/T 228.1 progresses, the tensile specimen into the sample in accordance with the provisions of GB/T 228.1 in S7 Line; hardness test carried out in accordance with the provisions of GB/T 4340.1 of.

4.4 Process performance test

4.4.1 pipe flaring test methods according to the provisions of GB/T 242 will be.

Flattening testing method in accordance with the provisions of 4.4.2 Pipe GB/T 246 will be.

4.5 Non-destructive testing methods

Hydrostatic test method 4.5.1 pipe according to the provisions of GB/T 241 will be.

4.5.2 Pressure test methods can be simple visual (or automatic test equipment) leakage was observed, for example, will be placed in the water pipe or differential pressure method.

Eddy current testing method GB 4.5.3 pipe/T 5248 of the regulations.

4.6 Thermal Performance test methods

Pipe heat transfer coefficient detection methods can refer to the provisions of Appendix A of conduct.

4.7 Residual Stress test methods

Pipe residual stress test method in accordance with the provisions of GB/T 10567.2 of.

4.8 Grain size test methods

Grain size pipe test method conducted in accordance with YS/T 347's.

4.9 Surface cleanliness test methods

Inner tube, the outer surface of the soil test method of total residues in accordance with Appendix B of the method. Test methods within the pipe surface cleanliness According to GB/T 17791-2007 Appendix A method to measure the outer surface residues within the total amount of residual contamination within the outer surface of the minus the amount of surface residues.

4.10 Surface quality inspection method

Pipe surface quality by visual inspection.

5.1 Inspection and acceptance

5.1.1 pipe should be for the technical supervision departments for examination, to ensure product quality in line with the provisions of this standard and the contract (or purchase order) and Fill in the quality certificate.

5.1.2 demand-side response received retest the product according to the provisions of this standard and the contract (or purchase order), the reinspection results with this standard or contract it does not match (or orders) provisions should be made to the supplier in writing by both parties through consultation. Belonging to the surface quality and size deviation the opposition should be the date of receipt of goods within one month, other properties belonging to the opposition, should be the date of receipt of goods within three months.

For arbitration, sampled by the supply and demand sides jointly.

5.2 Batch

Pipe should be submitted in batches acceptance. Each batch should be in the same grade, status and specifications of the product composition, the quality of each batch or not more than 4500kg 600.

5.3 Test Project

5.3.1 Factory inspection

5.3.1.1 Each batch should pipe chemical composition, dimensions, tensile strength, grain size, process performance, non-destructive testing (hydrostatic pressure test Inspection, pressure tests or eddy current testing method Choose one of the three test) and surface quality. When the demand side is required, should be carried out Total extension strength, Vickers hardness, residual stress, cleanliness testing.

5.3.1.2 Each batch wing argument pipes should be tested for the following items.

Number a) within the rack, the height of the helix angle;

b) the height of the outer wing, outer wing number of fins.

5.3.2 Type inspection

There are the following circumstances, the product should be the type of inspection. Type test items are shown in Table 11.

a) new products or old products to the plant trial to identify stereotypes;

B) When normal production, once a year type of inspection;

c) the product of raw materials, processes are major changes that may affect product performance;

Structure d) the product is changed greatly;

After e) Product Discontinuance resume production;

f) The factory test results and the last type tests in quite different;

g) takes party requirements;

h) national quality supervision bodies during type inspection requirements.

Table 11 test items

Test items Test items factory type test items Chemical composition sqrt sqrt Dimensions sqrt sqrt Tensile strength sqrt sqrt Total extension strength delta sqrt Vickers hardness delta sqrt Process performance sqrt sqrt Non-destructive testing sqrt sqrt Grain size sqrt sqrt Surface quality sqrt sqrt Residual Stress delta sqrt Cleanliness delta sqrt Thermal Performance - sqrt Note. The table "sqrt" means "test items"; "-" means "non-test items"; "delta" means "test items when requested by the demand side, there is."

5.4 Sampling

Product sampling to comply with Table 12.

Table 12 Sampling

Test items Test Method for Sampling Chapter Article number specified requirements of the reg number chemical composition Supply side in the casting, each take a test furnace Thus, the demand side in each batch of tubing either take a Sample 3.2 4.1 Dimensions deviation According to GB/T 2828.1 predetermined sampling, a Like test level II or agreement between the, Acceptance quality limit AQL = 2.5 3.3 4.2 Hydrostatic Testing Pressure test Eddy Current Inspection Supplier detected by the root, the demand side, two each batch Root, each either take a sample 3.6.1 3.6.2 3.6.3 4.4.3 4.4.4 4.6 Surface Quality Supplier detected by the root, the demand side either take a batch Samples 3.11 4.10 Flaring test Flattening test Residual Stress Two each batch, each pipe in the wingless Take any section of a sample 3.5.1 3.5.2 3.8 4.4.1 4.4.2 4.7 Mechanical Properties Two each batch, each either take a full cut Surface of the pipe section specimen (wingless section) 3.4 4.3 Grain size Two each batch, each either take a full cut Surface of the pipe section (wingless part) sample 3.9 4.8 Take any one sample of each batch Cleanliness 3.10 4.9 Take any two thermal performance, each either take a sample 3.7 4.5

5.5 Determination of test results

5.5.1 Chemical composition unqualified, this batch of product failure

5.5.2 surface quality, hydrostatic pressure, test, eddy current test failed when judged the root product failure; Dimensions unqualified, the root sentenced pipe failed. After each batch exceeds the number of failed reception quality threshold, the entire batch of substandard or sentenced by the supplier shall be tested individually qualified delivery.

5.5.3 mechanical properties, flaring test, flattening test, grain size, cleanliness, residual stress, thermal performance test results in specimen fails when, should the batch of the product (the original product or unqualified Flanagan Flanagan on behal...