A178 Boiler Tube
ASTM A178 boiler tube designed for high-pressure and high-temperature environments.
ASTM A192 A213 A335 GB531 Seamless Boiler Pipe Guide
Complete introduction of boiler tube definition, classification, international standards, steel grades, manufacturing process and full factory inspection rules.
Boiler tubes are specialized seamless hollow steel pressure parts that act as core heat exchange components inside steam boilers. They absorb heat from flue gas and heat circulating feedwater to generate saturated or superheated steam, enduring continuous high temperature, internal pressure and repeated thermal stress cycles. Different from ordinary structural or fluid seamless pipes, boiler tubes have extremely strict requirements on creep resistance, high-temperature oxidation resistance, low-temperature impact toughness and internal cleanliness to prevent pipe burst, medium leakage and unplanned plant shutdown accidents.
15CrMoG Seamless Boiler Tubes
| Tube Category | Max Service Temperature | Representative Material Grades | Boiler Application Position |
|---|---|---|---|
| Medium-Low Pressure Boiler Tube | ≤450℃ | 20G, ASTM A192 / A210 Gr.C | Small industrial boiler, low-pressure economizer coils |
| High Pressure Boiler Tube | 450℃ ~ 580℃ | 15CrMoG, ASTM A335 P11 / P22 | Medium power plant superheater & reheater |
| Ultra-Supercritical Boiler Tube | 580℃ ~ 620℃ | 10Cr9Mo1VNb, ASTM A335 T91 / P91 | Large thermal power main steam pipeline |
| Standard System | Core Standard Codes | Applicable Tube Type |
|---|---|---|
| US ASTM / ASME Standard | ASTM A192, A210, A213, A335 | Carbon & alloy boiler & heat exchanger tubes |
| Chinese GB National Standard | GB/T3087, GB 5310 | Medium & high pressure seamless boiler pipes |
| European EN Standard | EN 10216-2 | GH series pressure boiler tubes |
| German DIN Standard | DIN 17175 | Cr-Mo alloy boiler seamless tubing |
ASTM A213 and ASTM A335 are the most widely adopted standards for global thermal power EPC tender projects.
| Material Group | Typical Grades | Core Performance Advantage | Boiler Application Position |
|---|---|---|---|
| Carbon Boiler Steel | 20G, A192, A210 Gr.C | Low cost, excellent weldability | Low-medium pressure water wall, economizer tubes |
| Cr-Mo Medium Alloy | 15CrMoG, P11, P22 | Strong creep resistance below 580℃ | Medium power station superheater & header pipes |
| Martensitic Heat Resistant Alloy | 12Cr1MoVG, T91 / P91 | Ultra high temp oxidation & creep resistance | Ultra-supercritical main steam pipelines |
| Heat Resistant Stainless Steel | TP304H, TP316H | Sulfur & acid corrosion resistance | Waste incineration boiler heating surfaces |
| Mark Code | Treatment Type | Boiler Usage Scenario |
|---|---|---|
| NBK | Normalized | Standard carbon & alloy boiler tubes |
| GBK | Fully Annealed | U-bend superheater pre-processing tubes |
Each batch of boiler tubes is attached EN 10204 3.1 / 3.2 official MTC certificates containing full chemical, mechanical and NDT records for power plant tender audit submission.
| Industry Sector | Specific Boiler Equipment Application |
|---|---|
| Thermal Power Generation | Subcritical & ultra-supercritical boiler water wall, superheater, reheater, main steam headers |
| Petroleum & Refinery | Furnace heating tubes, waste heat recovery boiler bundles |
| Waste-To-Energy Plant | Sulfur flue gas resistant stainless boiler tubes |
| Industrial Steam Boiler | Factory heating, food & textile medium-pressure boiler coils |
| District Heating Station | Hot water boiler economizer & circulation tubing |
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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