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TORICH GB/T13793 10#15#20# Q195 215A 235A Welded Steel Tube Smooth Roughness

Basic Information
Place of Origin: China
Brand Name: torich
Certification: ISO9001:2008,ISO14001:2008,TS16949,CE PED,TUV,APIABS,BV
Model Number: GB/T13793
Minimum Order Quantity: 5 Ton
Price: 500-1200 USD/ton
Packaging Details: packing in wooden boxes or in hexagonal bundles
Delivery Time: 35 Days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 20000 T/Year
Detail Information
Name: GB/T13793 10#15# Steel Pipes With A Longitudinal Electric Resistance Weld Technique: HFRW
Surface: Oiled Delivery Condition: Heat Treatment
Usage: Construction Structure,Liquid Transportation Length: 4-12m
OD: 5-711mm WT: 0.5-50mm
High Light:

welded steel pipe

,

welding steel tubing


Product Description

Product Name:TORICH GB/T13793 Material 10#15#20# Q195 215A 235A Steel Pipes with a longitudinal Electric Resistance Weld

Standard:GB/T13793

Size Range: OD: 5-711mm WT: 0.5-50mm Length: 4-12mm or according to customers' actual application and production.

Application:Construction Structure,Liquid Transportation

Steel Grade:10# 15# 20# Q195/Q235/Q345/Q390/Q420

Technology:HFRW

Characteristic:

Good concentricity

Good surface quality

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE

 

Table 1 Tolerance of Outer Diameter Unit:mm

Outer Diameter(D) General Precesion(PD.A)a Higher Precision(PD.B) High Precision(PD.C)
5-20 ±0.30 ±0.15 ±0.05
﹥20-35 ±0.40 ±0.20 ±0.10
>35-50 ±0.50 ±0.25 ±0.15
>50-80 ±1%D ±0.35 ±0.25
>80-114.3 ±0.60 ±0.40
>114.3-168.3 ±0.70 ±0.50
>168.3-219.1 ±0.80 ±0.60
>219.1-711 ±0.75%D ±0.5%D
a Not apply for steel pipe for roller of belt conveyor

 

Table 2 Tolerance of Wall Thickness Unit:mm

Wall Thickness(t) General Precesion(PD.A)a Higher Precision(PD.B) High Precision(PD.C) Non-uniform Wall Thicknessb
0.50-0.70 ±0.10 ±0.04 ±0.03 ≤7.5%t
>0.70-1.0 ±0.05 ±0.04
>1.0-1.5 ±0.06 ±0.05
>1.5-2.5 ±10%t ±0.12 ±0.06
>2.5-3.5 ±0.16 ±0.10
>3.5-4.5 ±0.22 ±0.18
>4.5-5.5 ±0.26 ±0.21
>5.5 ±7.5%t ±5.0%t

a Not apply for steel pipe for roller of belt conveyor

b Not apply for General Precesion steel tube. Non-uniform Wall Thickness means the difference between maximum and minimum values of measured wall thickness on the same cross section.

 

Table 3 The Bending of Steel tube

Outer Diameter(D)/mm Bending/(mm/m),No more than
General Precesion(PD.A) Higher Precision(PD.B) High Precision(PD.C)
>16 1.5 1.0 0.5

 

Table 4 The Height of Inner Burr Unit:mm

General Precesion Higher Precision High Precision

+0.50

-0.20

+0.50

-0.05

+0.20

-0.05

 

Table 5 Weight coefficient of galvanized steel pipe

Wall thickness t/mm 1.2 .14 1.5 1.6 1.8 2.0 2.2 2.5 2.8 3.0 3.2 3.5
Coefficient c A 1.106 1.091 1.085 1.080 1.071 1.064 1.058 1.051 1.045 1.042 1.040 1.036
Coefficient c B 1.085 1.073 1.068 1.064 1.057 1.051 1.046 1.041 1.036 1.034 1.032 1.029
Coefficient c C 1.064 1.055 1.051 1.048 1.042 1.038 1.035 1.031 1.027 1.025 1.022 1.020
Wall thickness t/mm 3.8 4.0 4.2 4.5 4.8 5.0 5.4 5.6 6.0 6.5 7.0 8.0
Coefficient c A 1.034 1.032 1.030 1.028 1.027 1.025 1.024 1.023 1.021 1.020 1.018 1.016
Coefficient c B 1.027 1.025 1.024 1.023 1.021 1.020 1.019 1.018 1.017 1.016 1.015 1.013
Coefficient c C 1.020 1.019 1.018 1.017 1.016 1.015 1.014 1.014 1.013 1.012 1.011 1.010
Wall thickness t/mm 9.0 10.0 11.0 12.0 12.7 13.0 14.2 16.0 17.5 20.0    
Coefficient c A 1.014 1.013 1.012 1.011 1.010 1.010 1.009 1.008 1.007 1.006    
Coefficient c B 1.011 1.010 1.009 1.008 1.008 1.008 1.007 1.006 1.006 1.005    
Coefficient c C 1.008 1.008 1.007 1.006 1.006 1.006 1.005 1.005 1.004 1.004    

 

Table 6 Mechnical Properties

Steel Grade Lower yield strength Re1./MPa

Tensile strength

Rm/MPa

Elongation

A/

D≤168.3mm

 

D>168.3mm
08,10 195 315 22
15 215 355 20
20 235 390 19
Q195b 195 315 15 20
Q215A,Q215B 215 335
Q235A,Q235B,Q235C 235 370
Q275A,Q275B,Q275C 275 410 13 18
Q345A,Q345B,Q345C 345 470
Q390A,Q390B,Q390C 390 490 19
Q420A,Q420B,Q420C 420 520 19
Q460C,Q460D 460 550 17

 

Table 7 Weight of hot dip galvanized layer

Weight grade of galvanized layer Requirement

The total weight of zinc coating per unit area of the inner and outer surfaces

/(g/㎡)

no less than

A Inside and outside surface 500
B Inside and outside surface 400
C Inside and outside surface 300

 

Table 8 Test items and sampling for steel tubes

Number Test items Test frequency Sampling quantity
1 Smelting analysis 1/furnace 1
2 Finished product analysis 1/furnace 1
3 Tensile test 1/batch 1
4 Weld tensile test 1/batch 1
5 Impact test 1/batch 2 groups in a time, 3 samples in a group
6 Flattening test 1/batch 1 sample on 2 pipes in each batch
7 Bending test 1/batch 1 sample on 2 pipes in each batch
8 Flaring test 1/batch 1 sample on 2 pipes in each batch
9 Hydraulic test All All
10 Ultrasonic testing All All
11 Eddy current testing All All
12 Galvanized layer uniformity test 1/batch 1/batch
13 Galvanized weight determination 1/batch 1/batch
14 Galvanized layer adhesion test 1/batch 1/batch


TORICH GB/T13793 10#15#20# Q195 215A 235A Welded Steel Tube Smooth Roughness 0   TORICH GB/T13793 10#15#20# Q195 215A 235A Welded Steel Tube Smooth Roughness 1

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