Implementation Standards
GB/T3091-2015 low pressure fluid transport welded pipe, GB/T13793-2008 straight welded pipe, GB/T21835-2008 welded pipe size and unit length weight
Applicable Scope
The surface of the galvanized steel pipe has a hot dipped or galvanized layer of welded pipe. Galvanizing can increase the corrosion resistance of the steel pipe and prolong the service life. The use of galvanized pipe is very wide, except for water, gas, oil and other general low pressure fluid pipeline, is used in petroleum industry especially offshore oil well pipe and oil pipe, chemical coking equipment oil heater, cooler, oil pipe exchanger for coal distillation, and support piles, Zhanqiao mine tunnel the tubes.
Chemical Composition
Standard
Grade
Chemical Composition
C
Si
Mn
P、S
Cu
Ni
Mo
Cr
GB/T 8162
10
0.07～0.14
0.17～0.37
0.35～0.65
≤0.035
≤0.25
≤0.25
/
≤0.15
20
0.17～0.24
0.17～0.37
0.35～0.65
≤0.035
≤0.25
≤0.25
/
≤0.25
35
0.32～0.40
0.17～0.37
0.50～0.80
≤0.035
≤0.25
≤0.25
/
≤0.25
45
0.42～0.50
0.17～0.37
0.50～0.80
≤0.035
≤0.25
≤0.25
/
≤0.25
16Mn
0.12～0.20
0.20～0.55
1.20～1.60
≤0.035
≤0.25
≤0.25
/
≤0.25
Mechanical Property
Standard
Grade
Tensile Strength(MPa)
Yield Strength(MPa)
Elongation(%)
GB/T 8162
10
≥335
≥205
≥24
20
≥390
≥245
≥20
35
≥510
≥305
≥17
45
≥590
≥335
≥14
16Mn
≥490
≥325
≥21
EN 10297-1
E275
≥410
≥275
≥22
E315
≥450
≥315
≥21
34CrMo4
≥1000
≥800
≥11
42CrMo4
≥1100
≥900
≥10
JIS G3445
STKM13A
≥375
≥215
≥30
STKM13B
≥440
≥305
≥20
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