UNS N07718 High-Temp Seamless Tube ASTM B637 Nickel Alloy Seamless Pipe

I. Product Overview

Our nickel alloy tube series covers three main categories: Nickel Alloy Tubes, Capillary Precision Tubes, Welded Tubes, and Seamless Tubes. Crafted from premium UNS series nickel alloys (e.g., UNS N06455, N06022, N10276) and manufactured in compliance with ASTM/ASME standards (such as ASTM B619, ASME SB517), these tubes are engineered to perform in harsh environments—including high temperatures, high pressure, and corrosive conditions. They serve as critical components in industries like chemical processing, energy, and aerospace, delivering reliable pipeline solutions for industrial equipment.

II. Key Advantages1. Superior Material Performance

Our tubes are made from UNS series nickel alloys, each formulated to excel in specific conditions:

• High nickel content, combined with chromium, molybdenum, and iron, ensures exceptional corrosion resistance (resistant to strong acids, alkalis, and chloride-induced corrosion).

• Excellent high-temperature stability, withstanding continuous operation at 600–1200°C, making them ideal for high-heat applications.

• Good machinability, allowing for precise fabrication to meet custom design requirements.

2. Precision Manufacturing

• Capillary Precision Tubes: Produced via cold drawing/rolling, with outer diameters ranging from 0.5–20mm, wall thickness tolerances of ±0.01mm, and inner surface finish of Ra≤0.8μm—ensuring leak-free fluid flow and consistent performance.

• Seamless Tubes: Formed through hot rolling and cold working, with no weld seams, providing superior structural integrity and pressure resistance (operating pressure up to 10–30MPa).

• Welded Tubes: Fabricated using automated TIG welding, with welds that match the base material’s strength. Suitable for large-diameter (≥50mm) and long-distance pipeline needs, offering cost-effective solutions.

3. Compliance with International Standards

All products adhere to relevant ASTM/ASME standards, tailored to their specific alloys:

• UNS N06455: Complies with ASTM B619

• UNS N06022: Complies with ASTM B622

• UNS N10276: Complies with ASTM B675

• UNS N08825: Complies with ASTM B424

• (Full standard correspondence listed in Section IV)

We provide Material Test Reports (MTR) and non-destructive testing certificates (UT/MT) to verify compliance with customer specifications.

III. Product Types & Specifications

IV. Alloy & Standard Reference

V. Application Fields

• Chemical Industry: Acid/alkali transport pipelines, reactor coils, catalyst bed tubes

• Energy Sector: Oil/gas well casings, nuclear power heat exchanger tubes, coal-fired power plant desulfurization pipes

• Aerospace: Engine combustion chamber tubes, high-temperature exhaust pipes

• Pharmaceuticals: Precision fluid delivery tubes, sterile reaction equipment pipelines

• Marine Engineering: Seawater cooling systems, offshore platform pipelines

VI. Quality Control

• Raw Material Inspection: Each batch undergoes spectral analysis (PMI) to verify chemical composition.

• In-Process Monitoring: Online laser diameter measurement and ultrasonic thickness testing.

• Final Testing: Hydrostatic pressure testing, eddy current testing, and 100% radiography (RT) for welded tubes.

For custom specifications or technical inquiries, please contact our team—we ensure on-time delivery and dedicated after-sales support.