1. Boiler Steel Pipe The boiler steel pipe often works under high temperature and high pressure. It may be oxidized and corroded in the environment of high temperature flue gas and water vapor. Therefore, the product needs to possess high endurance strength, st
 

Boiler Steel Pipe

The boiler steel pipe often works under high temperature and high pressure. It may be oxidized and corroded in the environment of high temperature flue gas and water vapor. Therefore, the product needs to possess high endurance strength, strong antioxidant property and good organizational stability.

Standard and Steel Grade
  Seamless Steel Tube for High Pressure Boiler Seamless Steel Tube for Low and Medium Pressure Boiler
Chinese Standard GB5310-2008 GB3087-2008
Common Steel Grade 20G, 20MnG, 25MnG, 15MoG, 20MoG, 12Cr1MoVG, 15CrMoVG, 12Cr2MoG, 12Cr2MoWVTiB, 12Cr3MoVSiTiB 10#, 20 #
Common Foreign Standard ASTM A106-96a, ASTM A210C, ATSM A213-95a, JIS G3461-1988, JIS G3462-1998, DIN 17175-1979, BS3059: Part 2: 1990 ASTM A179, ASTM A192, ASTM SA179, SA192, BS3059
 
Dimension and Allowable Deviation
Dimension
External Diameter 14-630mm
Wall Thickness 2-80mm
Allowable Deviation
Standard External Diameter Allowable Deviation for External Diameter
DIN17175 ≤100 ±0.75%(Min. ±0.5mm)
>100 ±0.90%
GB3087 ≤180 ±1.0%(Min. ±0.5mm)
GB5310 ≤50 ±0.5mm
>50 ±1.0%
ASME SA-192M, ASME SA-209, ASME SA-210M, ASME SA-213M, JIS G3461 ≤101.6 ±0.4-0.8mm
>101.6-190.5 ±0.4-1.2mm
ASME SA-106 ≤48.3 ±0.40mm
>48.3-114.3 ±0.79mm
>114.3 ±1.5-0.79mm
 

We often produce the boiler steel pipe by adopting the high-quality carbon structural steel with the grade of 20G, 20MnG and 25MnG as well as the alloy structural steel with the grade of 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc. On the basis of guaranteeing the chemical composition and mechanical properties, each piece of the product must pass the hydrostatic test, flaring and flattening test. The boiler steel tube is delivered in the heat treatment state. Additionally, there are certain requirements to the finished steel tube in the respects of microscopic structure, grain size and decarburized layer.

The seamless steel pipe for boiler is compliant with the standard of GB5310-1995. By exploiting the materials of premium carbon steel, alloy steel and heat-resistant stainless steel, it is especially good for making the heating surface of the water tube boiler of high and higher pressure.

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