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Fluid pipes are pipes specially used for conveying media with fluid properties.
Medium with fluid properties, in addition to liquid media such as water, oil, and solution, solid media such as cement, grain, and coal powder can also flow under certain conditions.
The fluid tube can be made of steel, copper, titanium and other non-ferrous metals, or even plastic and other non-metallic materials.
Dimension Tolerances
|
Pipe types |
Pipe Szie(mm) |
Tolerances |
|
|
Hot rolled |
OD |
<50 |
±0.50mm |
|
≥50 |
±1% |
||
|
WT |
<4 |
±12.5% |
|
|
≥4～20 |
+15%, -12.5% |
||
|
>20 |
±12.5% |
||
|
Cold drawn |
OD |
6～10 |
±0.20mm |
|
10～30 |
±0.40mm |
||
|
30～50 |
±0.45 |
||
|
>50 |
±1% |
||
|
WT |
<1 |
±0.15mm |
|
|
>1～3 |
+ 15%, - 10% |
||
|
>3 |
+ 12.5%, - 10% |
||
Standards & Grades
|
Standards |
Grades |
|
ASTM A53M |
Gr.A, GR.B |
|
ASTM A106M |
Gr.A, Gr.B, Gr.C |
|
GB/T 8163 |
10#, 20#, Q345A, Q345B, Q345C, Q345D, Q345E |
|
JIS G3454 |
STPG 370, STPG 410 |
|
JIS G3455 |
STS370, STS 410, STS 480 |
|
JIS G3456 |
STPT 370, STPT 410, STPT 480 |
|
Standard |
Grade |
Chemical Components (%) |
Mechanical Properties |
|||||||||
|
c |
Si |
Mn |
P |
S |
Mo |
Cr |
V |
Tensile STrength(Mpa) |
Yield STrength(Mpa) |
Elongation (%) |
||
|
ASTM A53 |
A |
≤0.25 |
/ |
≤0.95 |
≤0.05 |
≤0.06 |
≤0.15 |
≤0.40 |
≤0.08 |
≥330 |
≥205 |
≥29.5 |
|
B |
≤0.30 |
/ |
≤1.2 |
≤0.05 |
≤0.06 |
≤0.15 |
≤0.40 |
≤0.08 |
≥415 |
≥240 |
≥29.5 |
|
|
Standard |
Grade |
Chemical Components(%) |
Mechanical Properties |
|||||||||
|
c |
Si |
Mn |
P |
S |
Mo |
Cr |
V |
Tensile STrength (Mpa) |
Yield STrength (Mpa) |
Elongation(%) |
||
|
ASTM A106 |
A |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≤0.15 |
≤0.40 |
≤0.08 |
≥415 |
≥240 |
≥30 |
|
B |
≤0.35 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≤0.15 |
≤0.40 |
≤0.08 |
≥485 |
≥275 |
≥30 |
|
