Jiangsu Cunrui Metal Products Co., Ltd. is one of the leading manufacturers and suppliers of heat resistant alloy tube in China. We are committed to providing high quality customized products made in China with competitive price. Please feel free to buy cheap heat resistant alloy tube in stock here from our factory. Also, free sample is available.
Preface
In high-temperature and high-pressure working conditions such as power boilers, petrochemicals, thermal power generation, high-temperature pipelines, and coal chemical industries, heat-resistant alloy tubes (Heat Resistant Alloy Tube) are the core components ensuring the continuous and stable operation of equipment. Our entire series of heat-resistant alloy tubes are strictly manufactured in accordance with the international standard ASTM A335 (ASME SA335). They are ferritic seamless alloy steel pipes. With excellent high-temperature strength, creep resistance, oxidation resistance and corrosion resistance, they have become the mainstream selected products for global high-temperature industrial pipeline systems. From raw material selection, hot rolling forming, heat treatment to non-destructive testing, all processes are subject to standard control. The product performance is stable, the service life is long, and it can withstand extreme high temperatures, high pressures and complex medium environments for a long time, suitable for various heavy-duty industrial scenarios.
Detailed Explanation of ASTM A335 Standard
ASTM A335/A335M is a renowned material standard in North America, specifically formulated to set specifications for seamless ferritic alloy steel pipes used at high temperatures. It is also the core reference for determining the quality of heat-resistant alloy tubes in the international industrial sector. This standard clearly defines the material grade, chemical composition, mechanical properties, heat treatment process, dimensional tolerances, test requirements, and acceptance criteria of the pipe materials. It is mainly applicable to seamless alloy pipes that operate in high-temperature environments for a long time, such as boilers, superheaters, heat exchangers, high-temperature headers, and process pipelines.
Heat-resistant alloy pipes produced in accordance with the ASTM A335 standard differ from ordinary carbon steel pipes and ordinary alloy pipes. The core advantage lies in: they are less prone to deformation at high temperatures, have strong resistance to creep fracture, and are less likely to oxidize and flake off in high-temperature flue gas/medium environments. They fully meet the safety usage requirements for high-end scenarios such as power generation, petrochemical, and nuclear power auxiliary equipment. Currently, the ASTM A335 standard includes various mainstream material grades, and different grades have distinct temperature ranges, pressure-bearing capacity, and application scenarios. The following is a basic parameter table for commonly used grades:
ASTM A335 Mainstream Grade Basic Parameter Table：
| Grade | Main Alloy Elements | Max Service Temperature | Typical Application | Tube Type |
|---|---|---|---|---|
| P1 | Cr-Mo | 450°C / 842°F | Low-temperature boiler pipeline, general heat exchange system | Seamless Alloy Tube |
| P2 | Cr-Mo | 480°C / 896°F | Medium pressure boiler tubes, industrial heating pipelines | Seamless Alloy Tube |
| P5 | High Cr-Mo | 550°C / 1022°F | Petrochemical high-temperature pipeline, furnace tube | Seamless Alloy Tube |
| P9 | High Cr-Mo | 580°C / 1076°F | Power plant superheater, reheater tube | Seamless Alloy Tube |
| P11 | Cr-Mo-Si | 560°C / 1040°F | Medium-high pressure boiler, heat exchanger tube | Seamless Alloy Tube |
| P12 | Cr-Mo | 570°C / 1058°F | Boiler header, high-pressure steam pipeline | Seamless Alloy Tube |
| P22 | 2.25Cr-1Mo | 600°C / 1112°F | Ultra-high pressure boiler, petrochemical reactor tube | Seamless Alloy Tube |
| P91 | 9Cr-1Mo-V-Nb | 620°C / 1148°F | Ultra-supercritical power unit, high-temperature main steam pipe | Seamless Alloy Tube |
Core product features of ASTM A335 heat-resistant alloy pipes
The Heat Resistant Alloy Tube produced by our company strictly complies with all the indicators of ASTM A335. It guarantees the reliability of the product from three aspects: performance, process and quality. This is also the core highlight that distinguishes it from non-standard pipe materials.
1,Outstanding high-temperature resistance and anti-rheological properties
The alloy ratio is designed in accordance with the ASTM A335 standard. Under long-term high-temperature and continuous load conditions, the pipe material will not undergo plastic deformation or creep failure. It can stably carry high-temperature steam, heat transfer oil, process flue gas and other media, and is suitable for industrial production lines with long-term continuous operation.
2,Excellent oxidation resistance and corrosion resistance
The chromium, molybdenum and other alloy elements form a dense protective layer. In high-temperature oxygenated, sulfur-containing and weak corrosive medium environments, it effectively resists oxidation, peeling, pitting corrosion and significantly extends the overall service life of the pipeline, reducing equipment maintenance and replacement costs.
3,Precise dimensions and seamless structure
All are produced using seamless rolling technology. The pipe wall structure is uniform, and the wall thickness tolerance strictly complies with the ASTM A335 size requirements. The internal flow resistance is small, the pressure-bearing capacity is strong, there is no leakage risk under high-pressure conditions, and the sealing performance of the pipeline system is better.
4,Comprehensive testing system
Each batch of heat-resistant alloy pipe has completed water pressure test, eddy current inspection, ultrasonic inspection, metallographic analysis, and mechanical property testing. All test data can be traced, and a complete standard material report and factory certificate are issued, meeting the requirements of international project acceptance.
Factory Strength
Our production base covers a spacious manufacturing area equipped with complete production and testing equipment, including advanced seamless rolling units, professional heat treatment systems and accurate detection tools. We follow stringent production protocols throughout the whole production flow, from raw material screening and hot forming treatment to finished product verification. Every shipment goes through systematic quality checks on chemical components, pressure endurance and material hardness, guaranteeing all delivered goods meet international quality criteria.
Main application fields
- Thermal power plant: boiler water-cooled tubes, superheater, reheater, main steam pipes, header pipes
- Petrochemical industry: hydrogenation unit, cracking furnace tubes, high-temperature reaction pipelines, high-temperature pipelines for oil and gas gathering and transportation
- Coal chemical industry: auxiliary pipelines of gasifiers, high-temperature heat exchange systems, process transportation pipelines
- Thermal engineering: large-scale heating boilers, high-temperature heat exchangers, supporting pipelines for industrial kilns
- Energy equipment: waste heat recovery equipment, connection pipes for special high-temperature pressure vessels
Choose our advantages
- Compliance with standards: All products fully comply with the ASTM A335/ASME SA335 standards. The materials, properties, and tests have all passed international certifications, and they can be compatible with domestic and overseas project tenders and acceptance.
- Production experience: We have been deeply engaged in the manufacturing of high-temperature alloy pipe materials for many years. We are familiar with the key process points and usage pain points of different ASTM A335 heat-resistant alloy pipes. We can precisely recommend materials and specifications based on the customer's working conditions.
- Quality control: From raw material entry to finished product delivery, all are subject to quality inspection. Non-standard additives are strictly prohibited. Each batch of products comes with a material list, flaw detection report, and mechanical property report.
- Delivery flexibility: We have regular inventory of mainstream brand names in stock. Large-scale orders can be quickly produced. We support various logistics solutions such as sea transportation and land transportation, and can meet the purchasing needs of global customers.
