Incoloy seamless pipe is made by heating solid billets to very high temperatures. It is pierced into hollow shells, then stretched and rolled with a mandrel to set the wall thickness and diameter. To get the final properties, heat treatments are done.
Incoloy Seamless Pipe Manufacturer
We are Zhejiang Xintongda Special Steel (XTD), an experienced China-based manufacturer and global supplier of high-performance Incoloy seamless pipes. This pipe is a nickel-iron-chromium alloy that provides structural integrity due to its seamless (SMLS) construction. It also results in a high-strength, uniform pipe that is ideal for high-pressure, leak-critical environments. Incoloy pipes are used in power generation, chemicals and petrochemicals, aerospace, and industrial furnaces. We manufacture this seamless Incoloy pipe in compliance with ASTM B407, ASTM B423, and ASTM B983 standards. We offer this pipe in different grades including 800, 800H, 800HT, 825, and 925. These pipes also come in multiple sizes, finishes, dimensions, and forms. Our advanced automation and precise testing equipment ensure the production of high-quality Incoloy pipes. We are a multiple international certified supplier and have a production capacity of 25,000 tons. As a trusted supplier, we provide pipes that are designed to endure harsh environments. Contact us today to secure your inventory at competitive pricing.
Our pipes meet the following specifications:
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OD Range
6-457 mm
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Thickness
1-65 mm
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Length
≤ 18 m
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What is Incoloy Seamless Pipe?
A seamless incoloy pipe is a high-performance pipe made from a specialised nickel-iron-chromium alloy. It is designed to resist oxidation and carburisation. Unlike welded varieties, these pipes are manufactured through a rotary piercing process where a solid billet is heated and stretched over a form. This "pierced solid billet" method, known as the Mannesmann process, eliminates the longitudinal seam. This creates a uniform structure that offers significantly higher mechanical strength and a higher safety margin under extreme pressure.
This pipe is known for its excellent pressure-handling capability and its ability to remain stable in both cryogenic and high-temperature environments. Incoloy alloys (especially 800/800H/800HT) have limited resistance to strong acids. Acid resistance is grade-dependent and strongest in Incoloy 825 and 925 due to Mo and Cu additions. Following are the common Incoloy pipe grades:
Incoloy Seamless Pipes Supplied in Various Grades
This pipe is known for its excellent pressure-handling capability and its ability to remain stable in both cryogenic and high-temperature environments. It effectively resists corrosive media, including sulfuric and phosphoric acids. Following are the common Incoloy pipe grades:
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Incoloy 800 Pipe
This pipe provides a balanced combination of high tensile strength and resistance to oxidation and carburisation at high temperatures.
02
Incoloy 800H / 800HT Pipe
These pipes are versions of Incoloy 800 with controlled carbon and grain sizes to ensure significantly improved creep and rupture strength.
03
Incoloy 825 Pipe
This pipe has added molybdenum and copper. This provides improved resistance to chloride stress-corrosion cracking and pitting.
04
Incoloy 925 Pipe
This is a precipitation-hardenable alloy that blends high strength with the excellent corrosion resistance typical of Incoloy 825.
Why Choose Incoloy Seamless Pipe?
The following 5 factors make Incoloy seamless pipes a preferred choice for demanding industries:
- Reliability in Critical Applications: The absence of a weld seam prevents weak spots in the pipe. This ensures the pipe remains dependable in high-risk environments where failure is not acceptable.
- Reduced Failure Risk: Because the pipe is a single piece of metal, there is no risk of seam separation. This uniformity allows for consistent expansion and contraction during temperature shifts.
- Long-term Cost Efficiency: The initial cost of the pipe may be higher, but the increased lifespan reduces the frequency of replacement. This means minimum maintenance costs and less operational downtime in the long run.
- Proven Performance in Extreme Environments: Incoloy pipe maintains its physical properties even when exposed to high heat or acidic chemicals. It is specifically engineered to handle the tough industrial conditions.
- Leak-Proof Integrity: The seamless construction of the pipe provides a smooth internal surface and a solid wall. This significantly reduces the risk of leakage that is ideal for transporting hazardous fluids.
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
What are the Industrial Applications of Incoloy seamless pipes?
Incoloy seamless pipes are commonly used in 7 demanding industries:
Power Generation
The Incoloy pipe is used in steam generator tubing and high-temperature heat exchangers. It handles the intense heat and pressure required to produce electricity.
Chemical & Petrochemical
This pipe transports aggressive acids and volatile chemicals during processing. The alloy prevents the container from corroding or thinning over time.
Oil & Gas
Grades such as Incoloy 825 and 925 are used in sour gas wells where high levels of hydrogen sulfide are present. It resists the cracking and corrosion common in deep-well drilling.
Industrial Furnaces
The seamless incoloy pipe serves as a radiant tube and muffle components within heat-treating furnaces. It can withstand constant exposure to open flames and high thermal loads.
Aerospace
This pipe is used in certain engine components and exhaust systems that require high strength at elevated temperatures. The durable nature of the alloy is critical for flight safety.
Marine
Corrosion-resistant grades such as Incoloy 825 are used for seawater piping and offshore platform equipment. It resists the pitting and crevice corrosion caused by constant salt-spray exposure.
Pollution Control
This pipe is used in "scrubber" systems to remove sulfur dioxide from industrial exhaust. It survives the highly acidic environment created during the gas cleaning process.
Frequently Asked Questions
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How is Incoloy seamless pipe manufactured?
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Where can I buy Incoloy seamless pipes with certification in China?You can buy Incoloy seamless pipes with certifications from us, at XTD. We are a trusted manufacturer and provide a comprehensive list of certifications to ensure our pipes meet the global standards.
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What are the main differences between Incoloy seamless pipes and welded pipes?The main differences between Incoloy seamless pipes and welded pipes are that seamless incoloy pipes are formed from a single billet with no welds. This offers higher strength, even walls, and better pressure resistance. Welded pipes, on the other hand, have seams with higher roughness and lower uniformity.
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What standards do Incoloy seamless pipes comply with?Incoloy seamless pipes comply with ASTM B407 for grade 800, 800H and 800HT, ASTM B423 for grade 825, and ASTM B983 for grade 925.
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What are the main benefits of using Incoloy seamless pipes?The main benefits of using Incoloy seamless pipes are high-temperature strength, excellent corrosion resistance in acids and chlorides, superior creep resistance and seamless integrity without weld weaknesses.