Import Ceramic Oval Double Bore Tubes — Buy in Bulk from Supplier in China

Ceramic oval double bore tubes from Engineering Ceramic Co., Ltd. are precision-formed from alumina 99.7% and silicon carbide, designed for high-temperature and chemically aggressive environments. The oval cross-section with dual internal bores reduces weight while maintaining structural integrity, with typical outer dimensions ranging from 10 mm to 50 mm in major axis and 6 mm to 30 mm in minor axis. Wall thickness varies between 1.5 mm and 5 mm depending on application, and surface finish is typically ground to a Ra value of 0.4 to 0.8 micrometres. These tubes are not coated or glazed, preserving the raw ceramic’s thermal and electrical insulation properties.

The material composition ensures thermal shock resistance up to 1400°C and low thermal expansion, making these tubes suitable for use as insulators, reactor liners, and sensor housings. Silicon carbide content enhances hardness and wear resistance, while alumina 99.7% provides electrical resistivity above 10^12 ohm-cm. In industrial contexts, such tubes are often selected over metal alternatives where corrosion resistance and non-reactivity are critical, particularly in semiconductor manufacturing and laboratory fluid handling systems. Typical tolerance on bore concentricity is ±0.1 mm, and dimensional stability under thermal cycling is a key performance metric.

These tubes are purchased by manufacturers in aerospace, electronics, and chemical processing sectors for use in thermal management systems, vacuum feedthroughs, and high-purity gas delivery lines. Buyers typically require batch-to-batch consistency in material composition and bore geometry. Packaging is done in foam-lined cardboard boxes with individual tube separation to prevent chipping. Trade terms offered include FOB Zhengzhou and CIF ports, with standard packaging for sea or air freight. MOQ is negotiable but usually starts at 100 pieces per size; lead times are 3 to 5 weeks after order confirmation.

Engineering Ceramic Co., Ltd. is based in Zhengzhou, Henan Province, China, with a registered address at Room 1019, Block A, Liansheng Plaza. The company is classified as an imported supplier with harbor trust tier, indicating verified export compliance and logistics capability. The listing shows no response rate or average response time, suggesting the company may operate with a standard inquiry workflow rather than real-time sales engagement. There is no mention of factory size, employee count, revenue, or client list in the source data.

The company focuses on producing technical ceramic components, including tubes, rods, and plates, primarily for industrial applications. It does not claim ISO or SGS certification in its profile, despite those being referenced in the product description. The supplier does not provide details on internal quality control processes, material traceability, or R&D capacity. Buyers should treat this as a trading entity or contract manufacturer without publicly disclosed manufacturing credentials beyond its physical address and export status.