high(low and medium) pressure boilers

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Jiangyin Tongda Special Pipe Manufacture Ltd.

No.1QiaohuangRD,Qiaoqi,Xiake town,Jiangyin

0510-86577888 86573666 0510-86576588

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high(low and medium) pressure boilers


company	Jiangyin Tongda Special Pipe Manufacture Ltd.
Update	2011-04-15
Original Region	China
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high(low and medium) pressure boilers

Seamless steel tubes in large calibers for high(low and medium) pressure boilers
and petrochemical industry
Seamless steel tubes in small calibers for high(low and medium) pressure boilers
and petrochemical industry

Seamless steel tubes in large calibers for high(low and medium) pressure boilers and petrochemical industry

Standards：
GB3087 Chinese national standard
GB5310 Chinese national standard
ASME SA106 Boiler and pressure vessel code of ASME
ASME SA333 Boiler and pressure vessel code of ASME
ASME SA335 Boiler and pressure vessel code of ASME
DIN17175 Deutsches industrial standard
EN10216-2 European standard for pressure pipes
Application：
For boilers and pressure vessels of medium and low pressures(normally,the cintainer and steam pipelines With the operating pressure not higher than 5.88Mpaoperating temperature below 450℃);for high-pressure boilers(normallythe cintainerssteam pipelines and petrochemical pipelines with the operating pressure not higher than 9.8Mpa．operating temperature between 450℃-650℃)．
Model No.of major steel tubes：
10,20,20G,20MnG,25MnG,15CrMoG,12Cr2MoG,12Cr1MoVG,10Cr9Mo1VNb,SA106B,SA106C,SA333 grade I,SA333 gradeⅥ,SA335 Ps,SA335 P11,SA335 P12,SA335P22,SA335 Pm91,SA335 P92ST45.8/Ⅲ15Mo313CrMo44,10CrMo910,15NiCuMoNb5-6-4．etc．
Diamensional tolerances:

Types of steel tubes	Outer diameters		Wall thickness
Cold-rolled tubes	Tube sizes(mm)	Tolerances(mm)	Tube sizes (mm)	Tolerances(mm)
	＞114～159	±0.8％	≤30	±10％
	＞159～219	±1.0％
Hot-rolled tubes	＞219～457	±1.0％	≤20	－10％＋12.5％
			＞20～40	－10％＋10％
	＞457～1066	±0.9％	＞40～70	－7％＋9％
			＞70～120	－6％＋8％

Mechanical properties：

Standard codes	Models of steel tubes	Tensite strength（MPa）	Yield strength（MPa）	Elongation	Absorbed-in-fracture energy（J）	Hardness
GB3087	10	335～475	≥195	≥24		/
GB3087	20	410～550	≥245	≥20		/
GB5310	20G	410～550	≥245	≥24	≥35	/
	20MnG	≥415	≥240	≥22	≥35	/
	25MnG	≥485	≥275	≥

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high(low and medium) pressure boilers