Where to buy seamless steel pipes in Kunshan
Tianjin Zhongjian Hua Electric Steel Co., Ltd.
Seamless Steel Pipe Department Tel: 022-26818163 86658109 Fax: 022-26916479
High-pressure Boiler Tube Department Tel: 022-26738163 86659638 Fax: 022-26916479
Petroleum Cracking Tube Department Tel: 022-26719948 86659738 Fax: 022-86658121
General Manager: Miao Zonghui
Mobile: 13752381288 15332138381
Website http://www.gb5310-2008.com
Main material components: 10#(st35),20#(st45),35#(st55),45#(st45),16Mn(st52), etc. DIN2391-81 standard outer diameter tolerance is ±0.08-0.10, inner diameter tolerance is ±0.10-0.15, wall thickness tolerance is ±0.10-0.15 as the standard Chemical composition: Standard grade chemical composition (%)
C Si Mn P S Cr Mo Ni
GB9948 10 0.07～0.14 0.17～0.37 0.35～0.65 ≤0.035 ≤0.035 ≤0.15 / ≤0.25
20 0.17～0.24 0.17～0.37 0.35～0.65 ≤0.035 ≤0.035 ≤0.25 / ≤0.25
15CrMo 0.12～0.18 0.17～0.37 0.40～0.70 ≤0.035 ≤0.035 0.80～1.10 0.40～0.55 ≤0.30
1Cr2Mo ≤0.15 0.50～1.00 0.30～0.60 ≤0.035 ≤0.030 2.15～2.85 0.45～0.65 /
1Cr5Mo ≤0.15 ≤0.50 ≤0.60 ≤0.035 ≤0.030 4.00～6.00 0.45～0.60 ≤0.60
GB5310 -2008——China National Standard High-pressure Boiler Tubes
(seamless steel tubes for high-pressure boilers) ASME SA106-------American Boiler and Pressure Vessel Specifications ASME SA210 —— American Boiler and Pressure Vessel Specifications ASME SA213 —— American Boiler and Pressure Vessel Specifications DIN17175 —— Federal German Industrial Standards
Section Editing High-pressure Boiler Tube Uses
Used in heat-exposed tubes of low and medium pressure boilers (operating pressure generally no more than 5.88Mpa, operating temperature below 450℃); used in heat-exposed tubes, economizers, superheaters, reheaters, petrochemical industry tubes, etc. for high-pressure boilers (operating pressure generally above 9.8Mpa, operating temperature between 450℃～650℃).
Section Editing High-pressure Boiler Tube Specifications and Appearance Quality
Specifications and appearance quality: The outer diameter of GB5310-95 high-pressure boiler tubes is 22～530mm, with wall thickness ranging from 20～70mm. Cold-drawn (cold-rolled) tube outer diameters are 10～108mm, with wall thicknesses ranging from 2.0～13.0mm.
Section Editing Main Grades of High-pressure Boiler Tubes
Current situation Total production and total consumption High-pressure boiler tubes Many factories produce high-pressure boiler tubes, especially those producing 20G, with a total production capacity of about 200,000 tons. However, there are not many factories with real production strength, with a production capacity of about 150,000 tons. The actual output in 1998 was less than 100,000 tons. Currently, the market share is 41%, and at the same time, the demand in the boiler industry is not strong. Φ10～1066mm specification steel pipes can all be supplied. For a long time, the main steel types have been 20G, 12Cr1MoV, G102. In the future, the main steel types will be 20G, 12Cr1MoV, T91 (P91), TP347H. Domestically, T91 (P91), TP347H are still in the trial production stage. The demand for high-pressure boiler tubes is inseparable from the development of thermal power. In 1995, the domestic installed capacity reached 200 million kW. According to government plans, it will reach 290 million kW by 2000, i.e., an annual increase of 16 million kW. Among them, thermal power (calculated at 75%), an annual increase of 12 million kW, boiler manufacturing consumes 100 tons of high-pressure boiler tubes per ten thousand kW, annually consuming 120,000 tons. Due to the overall introduction of imported boilers, the actual consumption is less than this number. Plus power station construction (1.7t/ten thousand kW), maintenance of the existing stock of thermal power units (6.5t/ten thousand kW), and the need for steel pipes with performance requirements similar to high-pressure boiler tubes, the estimated annual consumption in recent years is approximately 300,000 tons. With the increase in stock, the amount of pipe needed for future maintenance will be the first. The development of high-pressure boilers towards high-performance parameters and extended service life requires increasingly higher standards for steel types, and domestic research on new materials and pipe making lags behind needs. 10、20、20G、20MnG、25MnG、15CrMoG、12Cr2MoG、12Cr1MoVG、12Cr2MoWVTiB、10Cr9Mo1VNb、SA210A1、SA210C、SA213 T11、SA213 T12、SA213 T22、SA213 T23、SA213 T91、SA213 T92、ST45.8/Ⅲ、15Mo3、13CrMo44、10CrMo910, etc.
Section Editing Dimensional Tolerances of High-pressure Boiler Tubes
Type of steel Outer Diameter (D) Wall Thickness (S)
Cold-drawn tube Outer diameter of the tube (mm) Allowed deviation (mm) Tube wall thickness (mm) Allowed deviation (mm)
>30～50 ±0.3 >3～20 ±10%
High-pressure boiler tube weight calculation formula: [(Outer Diameter - Wall Thickness)*Wall Thickness]*0.02466=kg/meter(weight per meter)
Section Editing Mechanical Properties of High-pressure Boiler Tubes
Standard Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness
GB3087 10 335～475 ≥195 ≥24 /
20 410～550 ≥245 ≥20 /
GB5310 20G 410～550 ≥245 ≥24 /
20MnG ≥415 ≥240 ≥22 /
25MnG ≥485 ≥275 ≥20 /
15CrMoG 440～640 ≥235 ≥21 /
12Cr2MoG 450～600 ≥280 ≥20 /
12Cr1MoVG 470～640 ≥255 ≥21 /
12Cr2MoWVTiB 540～735 ≥345 ≥18 /
10Cr9Mo1VNb ≥585 ≥415 ≥20 /
ASME SA210 SA210A-1 ≥415 ≥255 ≥30 ≤143HB
SA210C ≥485 ≥275 ≥30 ≤179HB
ASME SA213 SA213 T11 ≥415 ≥205 ≥30 ≤163HB
SA213 T12 ≥415 ≥220 ≥30 ≤163HB
SA213 T22 ≥415 ≥205 ≥30 ≤163HB
SA213 T23 ≥510 ≥400 ≥20 ≤220HB
SA213 T91 ≥585 ≥415 ≥20 ≤250HB
SA213 T92 ≥620 ≥440 ≥20 ≤250HB
DIN17175 ST45.8/Ⅲ 410～530 ≥255 ≥21 /
15Mo3 450～600 ≥270 ≥22 /
13CrMo44 440～590 ≥290 ≥22 /
10CrMo910 480～630 ≥280 ≥20 /
Section Editing Chemical Composition of High-pressure Boiler Tubes
Standard Grade Chemical Composition (%)
C Si Mn P S Cr Mo Cu Ni V Al W Ti Nb N
GB3087 10 0.07～0.13 0.17～0.37 0.38～0.65 ≤0.030 ≤0.030 0.3～0.65 / ≤0.25 ≤0.30 / /
20 0.17～0.23 0.17～0.37 0.38～0.65 ≤0.030 ≤0.030 0.3～0.65 / ≤0.25 ≤0.30 / /