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GB24187 Cold-drawn precision single welded steel tubes

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Payment Type:

L/C,T/T,D/P,Paypal,Money Gram,Western Union

Incoterm:

FOB,CFR,CIF,FCA,CPT

Min. Order:

5 Ton

Transportation:

Ocean,Land,Air

Port:

Shanghai,Ningbo

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Product Description

Product Attributes
Supply Ability & Additional Information
Packaging & Delivery

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Overview

Product Attributes

Model No.: GB24187

Brand: Torich

Type: Welded

Certification: UL

Application: Hydraulic Pipe

Section Shape: Round

Surface Treatment: Oiled

Usage: Machinery

Technique: Cold Drawn

Material: Carbon Steel

Length: 1-12m

WT: 0.5-50mm

OD: 3-420mm

Name: GB24187 Cold-drawn Precision Single Welded Steel Tubes

Special Pipe: Welded Steel Tubes

Supply Ability & Additional Information

Packaging: packing in wooden boxes or in hexagonal bundles

Productivity: 20000 Tons per Year

Transportation: Ocean,Land,Air

Place of Origin: Zhejiang, China (Mainland)

Supply Ability: 60000 Ton per year

Certificate: ISO9001:2008 ISO14001:2008

HS Code: 7306301100

Port: Shanghai,Ningbo

Payment Type: L/C,T/T,D/P,Paypal,Money Gram,Western Union

Incoterm: FOB,CFR,CIF,FCA,CPT

Packaging & Delivery

Selling Units:: Ton

Package Type:: packing in wooden boxes or in hexagonal bundles

Product Name:GB24187 Cold rolled low carbon steel Cold-drawn precision single welded steel tubes

Standard: GB24187

OD: 3-420mm

WT: 0.5-50mm

Length: 1-12m or according to customers' actual application and production.

Application:Machinery

Steel Grade:10#.20#

Technology:cold drawn ,cold rolled

Characteristic:

Good concentricity

Good surface quality

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE

Table1 The type, state and code of the steel tube surface

Type

State

Code

Bright Surface

No coating on the inner and outer surface of steel pipe

SL

Copper plated surface

Copper plating on the outer surface of steel tube

Cu

Galvanized surface

Galvanized or zinc alloy on the outer surface of steel pipe

Zn

Double-sided copper plating surface

The inner and outer surfaces of the steel pipe are plated with copper

Cu/Cu

External galvanized inner copper plating surface

Galvanized or zinc alloy on the outer surface of steel pipe, copper plating on the inner surface

Zn/Cu

a.       Use electroplating, electroless or hot dip plating.

b.       Manufacture of steel strip with double-sided copper plating, and the quality of the coating at the weld line should be negotiated by both suppliers and suppliers.

c.        Manufacture of steel strip with double-sided copper plating.

Table 2 Outer diameter, wall thickness and theoretical weight

OD/mm

WT/mm

0.30

0.40

0.50

0.60

0.65

0.70

0.80

0.90

1.00

1.30

theoretical weight /(kg/m)

3.18

0.0213

0.0274

0.0330

4.00

0.0274

0.0355

0.0432

0.0503

4.76

0.0330

0.0430

0.0525

0.0616

0.0659

0.0701

5.00

0.0348

0.0454

0.0555

0.0651

0.0697

0.0742

6.00

0.0422

0.0552

0.0678

0.0799

0.0858

0.0915

0.1026

0.1132

0.1233

6.35

0.0448

0.0587

0.0721

0.0851

0.0914

0.0975

0.1095

0.1210

0.1319

7.94

0.0565

0.0744

0.0917

0.1086

0.1169

0.1250

0.1409

0.1563

0.1712

0.2129

8.00

0.0570

0.0750

0.0925

0.1095

0.1178

0.1260

0.1421

0.1576

0.1726

0.2148

9.53

0.0683

0.0901

0.1113

0.1321

0.1423

0.1524

0.1722

0.1915

0.2104

0.2639

10.00

0.0718

0.0947

0.1171

0.1391

0.1499

0.1605

0.1815

0.2020

0.2220

0.2789

12.00

0.0866

0.1144

0.1418

0.1687

0.1819

0.1951

0.2210

0.2464

0.2713

0.3430

12.70

0.0917

0.1213

0.1504

0.1790

0.1932

0.2072

0.2348

0.2619

0.2885

0.3655

14.00

0.1014

0.1342

0.1665

0.1983

0.2140

0.2296

0.2604

0.2908

0.3206

0.4072

15.88

0.1153

0.1527

0.1896

0.2261

0.2441

0.2621

0.2975

0.3325

0.3670

0.4674

16.00

0.1162

0.1539

0.1911

0.2279

0.2461

0.2641

0.3000

0.3352

0.3699

0.4713

18.00

0.1310

0.1736

0.2158

0.2575

0.2781

0.2987

0.3393

0.3795

0.4192

0.5354

Theoretical weight of no additional coating, density of steel is 7.85 kg/dm3

Outer diameter

Common precision

High precision

＜4.76

±0.08

±0.05

4.76-8.00

±0.12

±0.07

＞8.00-12.00

±0.16

±0.10

＞12.00

±0.20

±0.12

Table4 Permissible deviation of steel tube wall thickness

Wall thickness

Permissible deviation

＜0.70

±0.05

≥0.70

±0.07

Table5 Allowable deviation of specified length of steel pipe

Length

Allowable deviation

≤2000

+4

0

＞2000-5000

+7

0

＞5000-8000

+10

0

TABLE 6 Chemical Composition Of Steel Strip (Mass Fraction)%

Category

C

Si

Mn

P

S

Cold rolled low carbon steel strip

≤0.08

≤0.03

≤0.30

≤0.030

≤0.030

Cold rolled ultra low carbon steel strip

≤0.008

≤0.03

≤0.25

≤0.020

≤0.030

TABLE 7 Mechanical Properties Of Cold Rolled Low Carbon Steel Strip

Thickness

/mm

Tensile Strength

Rm/MPa

Yield Strength

Reh/MPa

Elongation

A/%

0.25~＜0.35

≥270

≥32

0.35~＜0.50

≥34

≥0.50

≥36

a Replace with RP0.2 when the yield phenomenon is not obvious.

b Sample type of sample number D14 in GB/T 228-2002.

TABLE 8 Mechanical Properties Of Cold Rolled Ultra-low Carbon Steel Strip

Thickness

/mm

Tensile Strength

Rm/MPa

Yield Strength

Reh/MPa

Elongation

A/%

≤0.50

≥280

130~250

≥38

＞0.50

≥40

a Replace with RP0.2 when the yield phenomenon is not obvious.

b Sample type of sample number P14 in GB/T 228-2002.

TABLE 9 Mechanical properties of steel pipe

Category

Tensile Strength

Rm/MPa

Yield Strength

Reh/MPa

Elongation

A/%

Ordinary steel pipe(MA)

≥270

≥180

≥14

Soft steel tube(MB)

≥230

150~220

≥35

a Replace with RP0.2 when the yield phenomenon is not obvious.

b Sample type of sample number S7 in GB/T 228-2002.

TABLE 10 Inspection Items, Test Methods And Sampling Quantity

NO

Inspection Items

Sampling Method ,Test Methods

Sampling Quantity

1

Chemical composition

GB/T 223, GB/T 4336, GB/T 20066

GB/T 20123, GB/T 20126

Take 1 samples per furnace

2

Mechanical property

GB/T 228

Take 1 samples per batch

3

Flattening test

GB/T 246

Take 1 samples per furnace

4

Expansion test

GB/T 242

Take 1 samples of two steel pipes per batch

5

Bending test

GB/T 244

Take 1 samples per batch

6

Hydraulic test

GB/T 241

Take 1 samples per batch

7

Flared test

Appendix A

Take 1 samples per batch

8

Requirements for the inner surface of high definition clean steel pipe

Appendix B

Consultation between Supply and demand parties

9

Outer coating

Appendix C

Consultation between Supply and demand parties

10

Residuals of internal surface cleanliness

Appendix D

Consultation between Supply and demand parties

Table A The Size of Single Double Flaring

Out

Dimensions

D

Single-Layer expansion diameter

D₁

Double-Layer expansion diameter

D₂

The minimum length of Double-Layer expansion diameter

L

Inner diameter of double-lay expansion

D₃

The inner diameter of flaring round corner

r

3.18

4.5

5.0

1.0

The maximum

size :(D-2S)+0.25

The minimum size:(D-2S)-0.50

1.0±0.3

4.00

5.4

6.0

1.0

4.76

6.3

7.0

1.0

5.00

6.6

7.3

1.0

6.00

7.7

8.4

1.0

6.35

8.1

8.8

1.0

7.94

10.1

10.7

1.6

8.00

10.1

10.8

1.6

9.53

11.8

12.5

1.6

10.00

12.3

13.0

1.6

12.00

14.6

15.2

1.6

14.00

17.0

17.5

2.1

15.88

19.1

19.6

2.1

16.00

19.2

19.7

2.1

18.00

21.5

22.0

2.1

Only to choose one from D₂ andD₃

Table C.1 The Label, Type and the Time of Anti-corrosion Steel Tubes for Refrigeration

Label

Type

The time of anti-corrosion

Cu

Copper-coated iron

--

Zn

Galvanized pipe

48h

Table C.2 The Conversion Film of Copper Tube on Its Label, Type, Typical Appearance and the Time of Anti-corrosion

Label

Type

Typical appearance

The time of anti-corrosion

A

Bright

Transparent, sometimes with a slight blue light

6h

B

Bleach

Transparent and a little iridescence

24h

C

Iridescence

The iridescence of partial yellow

72h

D

Dark color

Oliver green with brown and bronze

96h

E

Composite

Dark

200h

Note: This table is based on chromate conversion film, the use of other treatment methods can be negotiated by both parties

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Type	State	Code
Bright Surface	No coating on the inner and outer surface of steel pipe	SL
Copper plated surface	Copper plating on the outer surface of steel tube	Cu
Galvanized surface	Galvanized or zinc alloy on the outer surface of steel pipe	Zn
Double-sided copper plating surface	The inner and outer surfaces of the steel pipe are plated with copper	Cu/Cu
External galvanized inner copper plating surface	Galvanized or zinc alloy on the outer surface of steel pipe, copper plating on the inner surface	Zn/Cu
a. Use electroplating, electroless or hot dip plating. b. Manufacture of steel strip with double-sided copper plating, and the quality of the coating at the weld line should be negotiated by both suppliers and suppliers. c. Manufacture of steel strip with double-sided copper plating.