High pressure boiler seamless tube

High-pressure boiler tube is a seamless steel tube, mainly used to manufacture steam boiler pipes with high pressure and above, such as superheater tubes, reheater tubes, main steam pipes and other key components. Its specifications range from 8-1240×1-200mm, following the Chinese national standards GB3087-2008, GB5310-2008, as well as international standards such as ASME SA210, SA213 and German DIN17175.

This product is made of multiple grades of materials such as 10, 20G, 15CrMoG, 12Cr1MoVG, covering carbon steel and alloy steel categories. The chemical composition and mechanical properties must meet the strength and corrosion resistance requirements under high temperature and high pressure conditions. Its weight can be calculated by the formula (outer diameter-wall thickness) × wall thickness × 0.02466 per meter. The design parameters focus on dimensional accuracy and structural stability. It is suitable for high-load heat exchange systems such as thermal power plants and industrial boilers.

High-pressure boiler tubes are mainly used to manufacture superheaters, reheaters, water-cooled walls, economizers, etc. of supercritical or ultra-supercritical boilers. The steel tubes are required to have high endurance strength, high oxidation and corrosion resistance, and good structural stability.

Main grades or steel grades of American standard high-pressure boiler tubes
Common grades are: SA-179M, SA-192M, SA-209M T1a, SA-210M Gr.C, SA-210M Gr.A1, SA-213M T11, SA-213M T12, SA-213M T22, SA-213M T23, SA-213M T91

Implementation standards

SA-179/SA-179M Seamless cold-drawn low-carbon steel tubes for heat exchangers and condensers
SA-192/SA-192M Seamless carbon steel boiler tubes for high pressure
SA-209/SA-209M Seamless carbon-molybdenum alloy steel tubes for boilers and superheaters
SA-210/SA-210M Seamless medium carbon steel tubes for boilers and superheaters
SA-213/SA-213M Seamless ferrite and austenite alloy steel pipes for boilers, superheaters and heat exchangers

Product features

High-pressure boiler tubes are often used under high temperature and high pressure conditions. Under the action of high-temperature flue gas and water vapor, the tubes will oxidize and corrode. Therefore, high-pressure boiler steel pipes have high lasting strength, high anti-oxidation and corrosion performance, and good structural stability.

Mechanical properties

standard	Brand	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	/	-

Common Materials for High-Pressure Boiler Tubes

High-pressure boiler seamless tubes are typically made from carbon steel, alloy steel, or heat-resistant steel, depending on operating conditions.

1. Carbon Steel Grades
Used for medium to high pressure and moderate temperatures.
ASTM A106 Grade B / C
ASTM A192
EN 10216-2 P235GH / P265GH

2. Low-Alloy Steel Grades
Designed for higher temperature and pressure environments.
ASTM A213 T11 / T12 / T22
ASTM A335 P11 / P22
EN 10216-2 13CrMo4-5 / 10CrMo9-10

3. High-Alloy & Heat-Resistant Steel
Used in ultra-supercritical boilers.
ASTM A213 T91 / T92
ASTM A335 P91 / P92
These alloy steels contain Cr, Mo, and sometimes V or Nb, which significantly improve creep strength and oxidation resistance.

Manufacturing Process of High-Pressure Boiler Tubes

High-pressure boiler seamless tubes are produced through a controlled and traceable manufacturing process, typically including:
1.Steelmaking & billet preparation
2.Hot piercing to form a hollow shell
3.Hot rolling or cold drawing to achieve target dimensions
4.Heat treatment (normalizing, quenching & tempering)
5.Non-destructive testing (eddy current, ultrasonic, hydrostatic)
6.Dimensional and chemical analysis
7.Strict quality control at each stage ensures compliance with international boiler standards.

Conclusion

High-pressure boiler seamless tubes are essential materials for modern energy and industrial systems. Their performance depends on proper material selection, advanced manufacturing processes, and strict compliance with international standards. For applications involving high pressure and temperature, seamless boiler tubes provide unmatched safety, durability, and efficiency.