TORICH GB/T 14291 Welded Steel Tubes For Mine Liquid Service

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$600.00 - $1,000.00 / Ton | 1 Ton/Tons (Min. Order)
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Overview
Quick Details
Standard:
GB
Standard2:
GB/T 14291-2006
Grade Group:
Q195-Q345
Grade:
Q235, Q345
Thickness:
2 - 15 mm
Section Shape:
Round
Outer Diameter(Round):
20 - 660 mm
Place of Origin:
Zhejiang, China
Application:
Fluid Pipe
Certification:
API
Surface Treatment:
oiled
Special Pipe:
API Pipe
Alloy Or Not:
Non-alloy
Product name:
TORICH GB/T 14291 Welded Steel Tubes For Mine Liquid Service
Keyword:
welded steel tubes
standard:
GB/T 14291,
Surface:
Painting
Material:
Q235A,Q235B,Q295A,Q295B,Q345A,Q345B
Shape:
Round Shape
OD:
20-660mm
WT:
2-15mm
Length:
4-12m
Usage:
mine liquid service
Supply Ability
Supply Ability:
20000 Ton/Tons per Year welded steel tubes
Packaging & Delivery
Packaging Details
welded steel tubes packed in wooden boxes or hexagonal bundles in seaworthy packing.
Port
shanghai or ningbo

TORICH GB/T 14291 Welded Steel Tubes For Mine Liquid Service

 

Standard: GB/T 14291 Welded Steel Tubes For Mine Liquid Service. 

 

Out-of-roundness: The out-of-roundness of the steel pipe should not be more than 75% of the tolerance of the outer diameter.

 

Bending: The bending of the steel pipe should not be more than 1.2mm/m, and the total field bending should not be more than 0.12% of the total length of the steel pipe.

 

Pipe end: The pipe end bevel steel pipe should be less than 1.6mm

 

Usage: This standard is applicable to direct seam spot welding steel pipe for mine pressure wind, drainage, drainage gas and slurry transportation.

 

Note: Special steel grade is also available, according to customer request.

 

 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

 

Mechanical Property

Grade

Tensile strength Rm/

N/mm2

Lower yield strength  Rm/

N/mm2

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.

 

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

 

 

 

 

 

 

 

 

 

 

 

TORICH GB/T 14291 Welded Steel Tubes For Mine Liquid Service 

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