GB/T 13793 08# 10# Custom Galvanized Steel Pipes OD 4mm - 1200mm
Steel Pipes with a longitudinal (resistance) Weld GB/T 13793
Spec:
Material:08# 10# Q195 Q215 Q235 Q345
Size Range:OD:4-1200mm
WT:0.3-200mm
General Length:4-12m
Tolerance:
According to the following tables or customers’ request.
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 | ||||
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 Mechanical Properties
| Steel Grade | Lower yield strength Re1./MPa | Tensile strength | Elongation | |
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 | |
Processing:ERW
Technical Delivery Conditions:Welding or heat treatment
Widely used in the field of:Mechanical and construction application
Product Images:
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