products

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes

Basic Information
Place of Origin: Zhejiang, China (Mainland)
Brand Name: Torich
Certification: ISO9001:2008 ISO14001:2008
Model Number: GB24187
Minimum Order Quantity: 5 Ton/Tons
Price: US $500 - 900 / Ton
Packaging Details: packing in hexagonal bundles or wooden boxes
Delivery Time: 5-6 weeks
Payment Terms: D/A, D/P, L/C, T/T, Western Union, MoneyGram
Supply Ability: 25000 Ton/Tons per Year
Detail Information
Name: GB24187 Cold Rolled Low Carbon Steel Cold-drawn Precision Single Welded Steel Tubes Standard: GB/T 24187
Surface: Oiled Usage: Machianery
Technique: ERW,SAWL,SAWH OD: 3-420mm
WT: 0.5-50mm Length: 1-12m
High Light:

welded steel pipe

,

welding steel tubing


Product Description

 

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

 

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
  1. Use electroplating, electroless or hot dip plating.
  2. 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.
  3. 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/GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 0

 

 

 

Table3 Allowable deviation of outer diameter of steel pipe

 

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

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 1

Yield Strength

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 2

Elongation

A/%

0.25~<0.35 ≥270   ≥32
0.35~<0.50 ≥34
≥0.50 ≥36

a Replace with GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 3 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

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 1

Yield Strength

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 2

Elongation

A/%

≤0.50 ≥280 130~250 ≥38
>0.50 ≥40

a Replace with GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 3 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

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 1

Yield Strength

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 2

Elongation

A/%

Ordinary steel pipe(MA) ≥270 ≥180 ≥14
Soft steel tube(MB) ≥230 150~220 ≥35

a Replace with GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 3 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 and D3

 

 

 

 

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

 

 

 

 

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 10

GB24187 Oiled Welded Steel Tube Cold-Drawn Low Carbon Steel Tubes 11

Contact Details
Mike Lee

Phone Number : +8618958207750

WhatsApp : +8613736164628