The manufacturing process of Hastelloy seamless pipes involves heating and piercing a solid billet to form a hollow shell, hot-working and cold-drawing to get its precise dimensions, performing controlled solution annealing to restore its mechanical properties and corrosion resistance, pickling, and straightening. The final step is inspection and testing before packaging and dispatch.
Hastelloy Seamless Pipe Manufacturer
We are Zhejiang Xintongda Special Steel (XTD), a manufacturer of Hastelloy seamless pipes based in China. Hastelloy seamless pipe is a nickel-based, corrosion-resistant pipe produced without a longitudinal weld from a solid billet by hot piercing, cold drawing, solution annealing, and straightening. The alloy family is designed for the most aggressive acids, chlorides, and high-temperature service, where standard austenitic stainless steel would pit, crack, or corrode through. We manufacture Hastelloy seamless pipe to ASTM B622 (equivalent ASME SB-622) in six grades: the C-family (C-276, C-22, C-4, C-2000) for oxidizing and mixed-acid service, and the B-family (B-2, B-3) for reducing acids, especially hydrochloric acid. Common applications include chemical processing, flue-gas desulfurization, pharmaceutical, sour oil and gas, and pulp bleaching. We have been manufacturing seamless pipe for more than 40 years, and have a number of international certifications on our Certificate page, and our annual supply capacity is 25,000 tons. Stock orders are shipped in 1 week; custom production orders will take 15 to 60 days.
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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 Hastelloy Seamless Pipe?
A Hastelloy seamless pipe is a high-performance pipe made from nickel, chromium, molybdenum, tungsten, manganese, and other elements. This nickel-based Hastelloy pipe has the ability to handle extreme temperatures, pressure and corrosive environments. It can also resist stress corrosion cracking, including in knife-line attack at the weld heat-affected zone (HAZ). At XTD, we provide various grades of the Hastelloy seamless pipes, like Hastelloy C-22, C-276, B-2, C-4, B-3, and C-2000.
Different Hastelloy Grades Used in Seamless Pipes
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Hastelloy B2
Hastelloy B2 pipe, also called alloy B2 or Nimofer 6928, is a high-performance nickel-molybdenum alloy with high resistance to hydrochloric, sulfuric, hydrofluoric, acetic, and phosphoric acids. It also offers improved resistance to stress corrosion cracking at the knife-line and heat-affected zones compared to earlier B-series alloys. The equivalent designation of alloy B2 pipe is UNS N10665.
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Hastelloy C22
Hastelloy C22 pipe, generally known as Alloy C22, and Nicrofer 5621, is a seamless nickel-chromium-molybdenum-tungsten alloy pipe with outstanding overall corrosion resistance. It has excellent resistance to pitting, stress corrosion cracking, and crevice corrosion. It is globally known by its standard equivalent designation as UNS N06022.
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Hastelloy B3
Hastelloy B3 pipe, commonly referred to as Alloy B3, is a nickel-molybdenum alloy pipe which has excellent resistance to hydrochloric, sulfuric, and similar acids. It can also remain highly stable in elevated temperatures. The standard equivalent designation of alloy B3 is UNS N10675.
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Hastelloy C4
Generally known as alloy C4, the Hastelloy C4 pipe is a high-performance pipe made of nickel-chromium-molybdenum alloy. It has high stability at elevated temperatures, high ductility, and high corrosion and oxidation resistance. It is globally recognised as UNS N06455 (standard equivalent designation).
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Hastelloy C276
Hastelloy C276 pipe is also known as alloy C276, Nickelvac HC-276, and Nicrofer 5716. It is a nickel-based alloy that also contains high molybdenum, chromium, and tungsten. The alloy C276 is highly resistant to aggressive chloride-containing chemicals including ferric and cupric chlorides, wet chlorine gas, and organic acids like acetic and formic acid. It is globally known by its standard equivalent designation as UNS N10276.
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Hastelloy C2000
Commonly known as alloy 2000 or alloy C2000, Hastelloy C2000 pipe is a nickel-based alloy pipe made to resist many corrosive chemicals, including sulfuric, hydrochloric, and other acids. This pipe uses a combination of molybdenum and copper to resist reducing media. The equivalent designation for the alloy 2000 is UNS N06200.
What are the key advantages of Hastelloy Seamless Pipe?
There are 4 main advantages of the Hastelloy seamless pipe: prevents leak-related failures, increases system reliability, durable & long-lasting, and cost-effective long term.
- Prevents Leak-Related Failures: Hastelloy seamless pipe has a uniform microstructure throughout the wall thickness, and performs very well at heat-affected zones (HAZ). This prevents leak-related failures in the alloy.
- Increases System Reliability: The alloy has a high mechanical strength (yield and tensile strength), which prevents failure under stress. Also, it resists stress corrosion cracking very well. These properties increase overall system reliability.
- Durable & Long-Lasting: The high nickel, molybdenum, and chromium content helps provide resistance to corrosion in oxidising and reducing acids, chlorides and seawater, pitting, and crevice corrosion. The alloy also maintains its strength in elevated temperatures. The combination of these qualities means the pipe lasts longer and stays reliable in harsh conditions.
- Cost-Effective Long-Term: Since the Hastelloy pipe has better fabricability, durability, resistance to overall corrosion, and system reliability, it proves to be a cost-effective solution in the long run, especially in harsh processing environments.
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
Which industries use Hastelloy Seamless Pipes?
Hastelloy seamless pipe finds its application in industries that face reducing acids, chlorides, seawater, and oxidising environments.
Chemical processing
It is used in acid transfer lines, reactor inlet and outlet piping, agitator and recirculation loop piping, and heat exchanger tubing and piping headers.
Oil and Gas
Generally used in flowlines and gathering lines, offshore platform piping systems, gas sweetening and sulfur recovery unit piping, downhole production tubing, etc.
Energy and Power
In the energy and power industry, it is used in geothermal brine piping, Heat recovery steam generator (HRSG) piping, boiler feedwater and superheater piping, and Flue gas desulfurisation (FGD) system piping.
Pharmaceutical
Found in solvent recovery and recycling lines, high-purity chemical dosing lines, and API synthesis process lines.
Petrochemical
Hastelloy seamless pipe is used in aromatic and olefin processing lines, catalyst regeneration and transfer lines, and acid gas and sour water piping.
Aerospace
Generally used in hydraulic system lines, exhaust systems, fuel system piping, and Auxiliary Power Unit (APU) piping.
Frequently Asked Questions
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What Is the Manufacturing Process of Hastelloy Seamless Pipes?
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What temperatures can Hastelloy seamless pipes handle?Hastelloy seamless pipes can handle temperatures up to 1900°F (1038°C) for C-family alloys (C276, C22, C4, C2000) and up to 1600°F (870°C) for B3 and up to 1500°F (816°C) for B2 in reducing environments.
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Which Hastelloy grades are commonly used for seamless pipes?For seamless pipe, XTD supplies six Hastelloy grades: C-276, C-22, C-4, and C-2000 in the C-family for oxidizing and mixed-acid service, and B-2 and B-3 in the B-family for reducing-acid service. Grade selection depends on the acid type, chloride content, operating temperature, and whether the environment is oxidizing or reducing.
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What standards are Hastelloy seamless pipes manufactured to?We manufacture Hastelloy seamless pipe to ASTM B622 (equivalent ASME SB-622), which is the standard specification for seamless nickel and nickel-cobalt alloy pipe and tube. Material test certificates are issued to EN 10204 3.1 or 3.2 on request.