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  • Torich International Co.,Ltd--The Steel Tube Maker

  •  [Zhejiang,China]
  • Business Type:Distributor/Wholesaler , Manufacturer , Service , Trade Company
  • Main Mark: Africa , Americas , Asia , Caribbean , East Europe , Europe , Middle East , North Europe , Oceania , Other Markets , West Europe , Worldwide
  • Exporter:31% - 40%
  • Certs:GB, ISO9001, ISO14001
  • Description:Steel Tubes,Welded Steel Tubes,Welded Steel Tubes for Mine Liquid Service
Torich International Co.,Ltd--The Steel Tube Maker Steel Tubes,Welded Steel Tubes,Welded Steel Tubes for Mine Liquid Service
Home > Products > Welded Steel Pipe > GB/T 14291 Welded Steel Tubes for Mine Liquid Service

GB/T 14291 Welded Steel Tubes for Mine Liquid Service

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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: 2 Ton
    Delivery Time: 50 Days

Basic Info

Model No.: GB/T 14291

Type: Welded

Certification: API, CE, BSI, UL

Application: Fluid Pipe

Section Shape: Round

Surface Treatment: Oiled

Usage: Pipeline Transport, Mining, Mine Liquid Service

Technique: ERW

Material: Carbon Steel, Q235A,Q235B,Q295A,Q295B,Q345A,Q345B

Product Name: GB/T 14291 Welded Steel Tubes For Mine Liquid Service

Key Word: Welded Steel Tubes For Mine Liquid Service

Shape: Round

Length: 4-12M

OD: 21.3-660mm

WT: 2.5-14mm

Additional Info

Packaging: In bundles in wooden box

Productivity: 60000 Tons per Year

Brand: TORICH

Transportation: Ocean,Land,Air

Place of Origin: China

Supply Ability: 60000 tons per year

Certificate: ISO 9001 ISO 14001 TS 16949 EN 10204.3.1 LR KR

HS Code: 7306900090

Port: Shanghai,Ningbo

Product Description

GB/T 14291 Welded Steel Tubes for Mine Liquid Service



Application:Mine wind, drainage, drainage gas pressure and the pulp conveying with straight seam Welded Steel Pipe

Size:L--4~12m

OD--21.3-660mm

WT--2.5-14mm

Grade:Q235A,Q235B,Q295A,Q295B,Q345A,Q345B

Manufacture method:High-frequency resistance welding

Delivery state:Steel pipe should be straight seam tube flat end light delivery.The supply and demand both sides talks

things over, can also according to the weld heat treatment delivery status or other status.

TABLE 1 Allowable deviation of outer diameter and wall thickness

Unit: millimeter

Nominal outside diameter D

Allowable deviation of outer diameter

Permissible deviation of wall thickness

D≤48.3

±0.50

±10%S

48.3

±1%D

D>273

±0.75%D

TABLE 2 Mechanical Property

Grade

Tensile strength

Lower yield strength

Elongation A%

Not less than

D≤168.3

D>168.3

Q235A,Q235B

375

235

15

20

Q295A,Q295B

390

295

13

18

Q345A,Q345B

470

345

13

18

Note : Tensile test arbitration time is based on longitudinal sample.

TABLE 3 Inspection items, test methods and sampling number of steel pipes

NO

Inspection project

Sampling method and test method

Sampling quantity

1

chemical composition

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

One each furnace(canister)

2

Tensile test

GB/T 228,GB/T 2975

One each batch

3

Tensile test

GB/T 241

One by one

4

Ultrasonic examination

GB/T18256

One by one

5

Eddy current flaw detection

GB/T 7735

One by one

6

Bending test

GB/T 244

Two per batch

7

Flattening test

GB/T 246

Four each roll


Table 1 Outer Diameter.Wall Thicknes.Theoretical Weight and Test Pressure

Norminal Outer Diameter(D)/mm

Norminal Wall Thickness(S)/mm

Theoretical Weight/(kg/m)

Test Pressure/MPa

Q235A.Q235B

Q295A.Q295B

Q345A.Q345B

21.3

2.5

1.16

15

15

15

21.3

3

1.35

15

15

15

21.3

3.5

1.54

15

15

15

25

2.5

1.39

15

15

15

25

3

1.63

15

15

15

25

3.5

1.86

15

15

15

25

4

2.07

15

15

15

26.9

2.5

1.50

15

15

15

26.9

3

1.77

15

15

15

26.9

3.5

2.02

15

15

15

26.9

4

2.26

15

15

15

31.8

2.5

1.81

15

15

15

31.8

3

2.13

15

15

15

31.8

3.5

2.44

15

15

15

31.8

4

2.74

15

15

15

33.7

2.5

1.92

15

15

15

33.7

3

2.27

15

15

15

33.7

3.5

2.61

15

15

15

33.7

4

2.93

15

15

15

38

2.5

2.19

15

15

15

38

3

2.59

15

15

15

38

3.5

2.98

15

15

15

38

4

3.35

15

15

15

40

2.5

2.31

15

15

15

40

3

2.74

15

15

15

40

3.5

3.15

15

15

15

40

4

3.55

15

15

15

42.4

2.5

2.46

15

15

15

42.4

3

2.91

15

15

15

42.4

3.5

3.36

15

15

15

42.4

4

3.79

15

15

15

48.3

2.5

2.82

14.6

15

15

48.3

3

3.35

15

15

15

48.3

3.5

3.87

15

15

15

48.3

4

4.37

15

15

15

51

2.5

2.99

13.8

15

15



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  • GB/T 14291 Welded Steel Tubes for Mine Liquid Service
  • GB/T 14291 Welded Steel Tubes for Mine Liquid Service
  • GB/T 14291 Welded Steel Tubes for Mine Liquid Service
  • GB/T 14291 Welded Steel Tubes for Mine Liquid Service
  • GB/T 14291 Welded Steel Tubes for Mine Liquid Service
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