Round Bar

Seamless Pipe

Rectangular Pipe

20# Galvanized Round Pipe

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
Standard	Grade	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
JIS G3445	STKM13B	≥440	≥305	≥20

Product

Round Bar

Seamless Pipe

Rectangular Pipe

20# Galvanized Round Pipe