Seamless steel tubes for ships Seamless steel tubes for ships

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Jiangyin Tongda Special Pipe Manufacture Ltd.

No.1QiaohuangRD,Qiaoqi,Xiake town,Jiangyin

0510-86577888 86573666 0510-86576588

Larger photo of Seamless steel tubes for ships Seamless steel tubes for ships

Seamless steel tubes for ships Seamless steel tubes for ships


company	Jiangyin Tongda Special Pipe Manufacture Ltd.
Categories	LED Displays
Update	2011-04-15
Original Region	China
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Seamless steel tubes for ships Seamless steel tubes for ships

Seamless steel tubes for ships

Standards：
Standard for malerials and wielding from Chinese classifying society Chinese clasifying society(CCS)
Standard of DNV Det Norske Veritas(DNV)
Standard of Lloyd'S Register of UK(LR)Lloyd'S Register of UK(LR)
Standard of Germanischer Lloyd Germanischer Lloyd(GL)
Standard of American Bureau of Shipping(ABS)American Bureau of Shipping(ABS)
Standard of BUREAU VERITAS(BV)BUREAU VERITAS(BV)
Standard of RINA Italian classification society(RINA)
Standard of NIPPON KAIJI KYOKAI(NK)NIPPON KAIJI KYOKAI(NK)
GB／T5312 Chinese national standard
Appication：
Seamless steel tubes for manufacturing marine boilers and ovemeaters as we as pressure pipes opf grade I and
Model N0．of major steel tubesL:
320360410460490etc．
Diamensional tolerances:

Types of steel tubes	Outer diameters		wall thickness
Cold-rolled tubes	Rube size(mm)	tolerances(mm)	Tube sizes (mm)	Tolerances(mm)
	＞30～50	±0.3	≤30	±10％
	＞50～219	±0.8％	≤30	±10％
Hot-rolled tubes	＞219	±1.0％	＞20	±10％

Mechanical properties：

Standard code	Models of steel tubes	Tensile strength（MPa）	Yield strength（MPa）	Elongation
GB/T5312	320	320～410	≥195	≥25
	360	360～480	≥215	≥24
	410	410～530	≥235	≥22
	460	460～580	≥265	≥21
	490	490～610	≥285	≥21

Chemical compisition:

Standard code	Models of steel tubes	Chemical compisition
Standard code	Models of steel tubes	C	Si	Mn	P	S
GB/T5312	320	≤0.16	≤0.35	0.40～0.70	≤0.035	≤0.035
	360	≤0.17	≤0.35	0.40～0.80	≤0.035	≤0.035
	410	≤0.21	≤0.35	0.40～1.20	≤0.035	≤0.035
	460	≤0.22	≤0.35	0.80～1.40

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Seamless steel tubes for ships Seamless steel tubes for ships

high(low and medium) pressure boilers