Heavy-Wall Niobium Tubing

Product Overview and Design Highlights

    Ordinary thin-walled seamless pipes cannot withstand high mechanical and thermal stresses in high-demand application scenarios such as extreme high pressure, strong corrosive media, and superconducting/ultra-high vacuum systems (UHV). Our High-Purity Heavy-Wall Niobium Tubing/Machined Niobium Thick Pipes provide fluid and structural load-bearing solutions with excellent ductility and strong corrosion resistance for difficult engineering designs such as high-pressure chemical reactors, superconducting radio frequency cavities (SRF Cavities) preforms, nuclear energy cooling cycle systems, and semiconductor Sputtering Target Cores.

    As shown in the physical picture, this series of products is processed by high-density smelting pure niobium rods through precision Gun-Drilling (deep hole drilling) and CNC turning grinding. Different from drawing pipes, thick-walled pipes formed by deep-hole drilling have extremely high coaxiality (Concentricity) and wall thickness uniformity, and the pipe ends have undergone precise chamfering and flat-head treatment (Beveled & Square-Cut Ends), and the outer circular surface presents a delicate and consistent finishing/grinding metallic luster. The material is UNS R04200/R04210 high-purity niobium billet with a purity of ≥ 99. 95%. After high Vacuum Stress-Relieving Annealing, it is ensured that the pipeline will not undergo microscopic cracking when it is extremely bent, welded or subjected to internal pressure thermal cycling.

Product Core Value

    1. Deep hole drilling gun drilling process ensures seamless compactness and high pressure resistance (Seamless Gun-Drilled Durability) Unlike welded pipes formed by plate coil welding, our thick-walled niobium pipes are completely drilled and machined by whole rod deep hole forming. There is no longitudinal weld in the tube body, which avoids grain coarsening or microscopic cracking caused by welding heat affected zone (HAZ). This makes it have an extremely high safety allowable stress and pressure limit (High Burst Pressure), which can calmly cope with extreme internal pressures in the high-pressure chemical and nuclear industries.

    2. Excellent resistance to molten metals and strong acid corrosion (Superior Corrosion Resistance) High-purity niobium materials have excellent chemical inertia against most strong inorganic acids (such as high-concentration hydrochloric acid, nitric acid, wet chlorine). More importantly, niobium has strong corrosion resistance to molten alkali metals (such as molten lithium Li, sodium Na, potassium K) and molten salt systems. Therefore, thick-walled niobium tubes are often used as high-temperature heat exchange circuits in nuclear reactors, highly corrosive chemical synthesis reactors, and high-temperature fluid transportation pipelines.

    3. Superconductivity for the superconducting and semiconductor industry & PVD Sputtering Cores In particle accelerators and superconducting engineering, high-purity niobium tubes are the basis for making superconducting radio frequency cavities (SRF Cavity) and superconducting wire bushings. At the same time, in the manufacture of semiconductor PVD Rotatable Sputtering Targets (Rotatable Sputtering Targets) with large outer diameter, thick wall thickness and extremely high inner and outer surface roughness requirements, precision thick-walled niobium tubes can be directly used as backing tubes or targets. The main body is used.

    4. 100% Engineering Drawing Customization and Deep Processing Matching (Custom Machining & Prototyping) We are equipped with a powerful CNC machining center. In addition to supplying standard length straight pipes, we also support secondary deep processing according to STEP, IGES, DWG, PDF drawings provided by purchasers, including outer grooving, end flange integral molding, Internal/external thread tapping and special-shaped pipe fittings processing, helping buyers simplify the procurement process.

Core technical parameters and specifications

  Basic physical and chemical properties

  Specifications and Machining Techniques

Typical application areas

    Superconductivity and high energy physics: particle accelerator superconducting radio frequency cavity (SRF), superconducting magnet structure support and cryogenic pipeline.

    High-pressure chemical industry and corrosive fluid control: strong acid-resistant heat exchanger, high-pressure synthetic reaction kettle conduit and high-temperature acidic medium conveying line.

    Nuclear and power: liquid metal cooled nuclear reactor circuits, rocket engine thrust chamber bushings (C-103 alloy fittings).

    Semiconductor and thin film coating: planar/rotating niobium target inner core tube, electron beam evaporation module and high temperature and high vacuum electrode insulation protection sleeve.

Control and Export Packaging

    Each batch of delivered niobium thick-walled pipes has undergone strict ultrasonic testing (UT Testing) to ensure that the pipe walls are free of internal slag inclusions and pores, and is accompanied by a quality inspection certificate (MTC) that complies with EN 10204 3.1 standard, including ICP-MS chemical composition analysis and mechanical tensile test data. In terms of packaging, each pipe body is individually wrapped with PE anti-scratch protective film, plastic dust-proof protective plugs are installed at the mouth of the pipe, the interior is separated and fixed with customized foam, and the outer layer is packed in a fumigation-free solid wooden box that meets export standards to ensure that the product Zero deformation and zero bump during long-term cross-border transportation.