Incoloy 825 Welded Tubes Sulfuric Acid Resistant for Wastewater Treatment & Pickling Lines

Incoloy 825 welded tubes are engineered to offer superior resistance to sulfuric acid and other aggressive chemicals, making them ideal for demanding industrial applications such as wastewater treatment and metal pickling operations. These tubes are made from a nickel-chromium-iron alloy with additional molybdenum and copper, providing excellent performance in environments where corrosion resistance is critical. The welded construction offers both cost-effectiveness and reliable performance in harsh chemical conditions.

• Superior Chemical Resistance
  Incoloy 825 welded tubes offer exceptional resistance to sulfuric acid, particularly at concentrations up to 98%, making them ideal for applications involving acidic waste and pickling solutions. This alloy also performs excellently in environments exposed to phosphoric acid, nitric acid, and seawater, ensuring versatility in various industrial environments.

• High-Temperature Resistance
  Incoloy 825 maintains its mechanical properties and structural integrity even at high temperatures. The alloy can withstand continuous service temperatures up to 815°C (1500°F) and short excursions up to 870°C (1600°F), making it suitable for both high-temperature pickling processes and wastewater treatment systems.

• Excellent Corrosion Resistance
  The high nickel and molybdenum content in Incoloy 825 makes it highly resistant to pitting, crevice corrosion, and stress corrosion cracking. This makes it an ideal material for environments where exposure to aggressive chemicals is a common concern, such as sulfuric acid, seawater, and chloride-containing solutions.

• Weldability and Fabrication
  Incoloy 825 welded tubes can be easily welded using conventional techniques like TIG and MIG welding. This flexibility ensures the material can be used in a variety of custom applications, reducing the need for specialized welding equipment.

Incoloy 825 welded tubes are used in industries that require reliable performance in aggressive chemical environments. Some of the key applications include:

Incoloy 825 tubes are designed for handling corrosive wastewater in various industries. Applications include:

• Transport lines for sulfuric acid waste streams

• Scrubber system components

• Neutralization tanks and their internals

• Industrial effluent piping systems

Incoloy 825 is ideal for use in metal pickling lines, where tubes are exposed to strong acids used in cleaning and descaling metal surfaces. Applications include:

• Pickling tank circulation systems

• Acid recovery unit components

• Rinse water transfer lines

• Fume exhaust ducts

Due to its excellent corrosion resistance, Incoloy 825 is also used in various chemical processing applications, such as:

• Sulfuric acid production equipment

• Phosphate fertilizer manufacturing systems

• Acid handling systems

Incoloy 825 is resistant to seawater and other corrosive environments, making it ideal for use in marine applications, including:

• Offshore oil platforms

• Seawater cooling systems

• Subsea equipment

• Long-Term Durability
  Incoloy 825 welded tubes offer outstanding durability in aggressive chemical environments, including sulfuric acid and seawater. Their excellent resistance to corrosion, pitting, and stress cracking reduces the need for frequent maintenance and equipment replacements, leading to cost savings over time.

• Enhanced Safety and Reliability
  The resistance to high temperatures and corrosive environments ensures Incoloy 825 tubes provide enhanced safety and operational reliability. This reliability is critical in wastewater treatment and pickling lines, where failure can result in downtime and expensive repairs.

• Cost-Effectiveness
  While Incoloy 825 welded tubes may come with a higher initial investment compared to some other materials, the extended service life and reduced maintenance costs provide significant long-term savings in applications like wastewater treatment, pickling, and chemical processing.

• Corrosion Resistance: Incoloy 825 welded tubes are highly resistant to the sulfuric acid and other aggressive chemicals commonly found in wastewater treatment systems. This makes them a preferred choice for handling acid waste in industrial settings.

• Compliance with Environmental Regulations: Incoloy 825 meets industry standards for hazardous material handling and wastewater treatment, helping plants comply with environmental regulations.

• Lower Maintenance Costs: Incoloy 825's durability in challenging conditions reduces the frequency of replacements and repairs, lowering overall maintenance costs.

• Hot Acid Resistance: Incoloy 825 welded tubes are capable of withstanding the harsh acidic solutions used in metal pickling, making them ideal for pickling tank circulation systems and other high-temperature applications.

• Smooth Internal Surfaces: The smooth, corrosion-resistant surface of Incoloy 825 tubes helps prevent particle buildup and scaling, ensuring better flow rates and efficiency in pickling lines.

• Weld Integrity: Incoloy 825’s welded construction ensures that these tubes maintain their integrity even in pressurized systems, which is essential in pickling operations and other high-pressure environments.

• ASTM B829/B725 Compliant

• Radiographic testing (RT) available

• Hydrostatic testing per customer requirements

• Full material certification with traceability

Chemical Composition Requirement

• Welding: Use proper welding techniques with matching filler metals to maintain joint integrity.

• Heat Treatment: Post-weld heat treatment (PWHT) is recommended for certain applications to further enhance the material’s corrosion resistance.

• Regular Inspections: Visual inspections and non-destructive testing (NDT) should be performed regularly to detect potential issues early.

• Cleaning Procedures: Clean tubes thoroughly after fabrication to remove any contaminants that could affect performance.

• Material selection guidance

• Custom fabrication options

• Welding procedure specifications

• Failure analysis and troubleshooting

CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got ISO9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, Precision Alloy , FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.

Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. We also provide chemical analysis reports for every FeCrAl alloy, NiCr alloy, and other products purchased.

For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

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FAQ

Q: What is Incoloy 825 made of?
A: Incoloy 825 is a nickel-iron-chromium alloy with additional molybdenum and copper, designed for excellent resistance to sulfuric acid, high temperatures, and corrosive chemicals.

Q: What industries use Incoloy 825 welded tubes?
A: Incoloy 825 welded tubes are used in industries such as wastewater treatment, metal pickling, chemical processing, marine applications, and offshore oil & gas.

Q: Can Incoloy 825 tubes be welded?
A: Yes, Incoloy 825 welded tubes can be easily welded using standard techniques like TIG and MIG welding, providing strong and durable joints.

Q: What are the main benefits of Incoloy 825?
A: The main benefits include excellent resistance to sulfuric acid and other aggressive chemicals, high-temperature strength, long service life, and reduced maintenance costs.

Q: How long can Incoloy 825 welded tubes last in sulfuric acid service?
A: Incoloy 825 welded tubes typically have a service life of 10-20 years in continuous sulfuric acid service, depending on the operating conditions.