OEM/ODM Seamless Titanium Tube Supplier & Suppliers

ASTM B338 explicitly governs seamless and welded titanium and titanium alloy tubes engineered for surface condensers, evaporators, and heat exchangers. This standard places strict limits on wall thickness uniformity, strict reverse flattening tests, dynamic flaring tests, and mandatory 100% pneumatic or hydrostatic testing to prevent bundle leakage. Conversely, ASTM B861 covers titanium seamless pipe intended for general corrosive and elevated-temperature industrial service, typically characterized by nominal pipe sizes (NPS Schedule sizes 10S, 40S, 80S) with higher permitted structural wall variations and pressure piping criteria per ASME B31.3.

Welded tubing contains a longitudinal weld fusion line that alters the grain structure into cast dendritic alpha/beta phases. In reducing acidic or high-chloride media, the weld boundary and heat-affected zone (HAZ) are prone to preferential galvanic and crevice attack. Seamless titanium tubing is homogeneous throughout its circumference, exhibits no residual weld stresses, eliminates the possibility of fusion voids, and provides substantially superior fatigue life in reciprocating compressors and pulsing heat exchangers.

Titanium avidly absorbs monatomic hydrogen at temperatures above 80°C when exposed to non-oxidizing acids. Jovzi enforces strict chemical bath control: our chemical cleaning tanks employ a precisely buffered Nitric-Hydrofluoric mixture with an HNO₃ to HF ratio strictly maintained above 10:1 (typically 30% HNO₃ + 3% HF by volume). The high concentration of oxidizing nitric acid maintains the passivating TiO₂ protective surface film, inhibiting nascent hydrogen uptake. Post-pickling inert gas vacuum degasification is executed whenever hydrogen content approaches 0.010% (100 ppm).

In full accordance with ASTM B338, our seamless tubes undergo a mechanical flare test using a hardened 60° conical mandrel until the tube mouth expands by a minimum of 20% to 24% (depending on grade) without showing microscopic tearing or fissuring. Flattening tests require compressing the tube between parallel plates to a specified distance H = (1 + e)t / (e + t/D) without cracking. Actual measured mechanical deflections and tensile test values are recorded under the heat number on the EN 10204 3.1 inspection sheet.

Jovzi specializes in outside diameters (OD) ranging from 3.0 mm up to 114.3 mm, with wall thicknesses (WT) ranging from ultra-thin 0.35 mm up to heavy-wall 12.0 mm. Standard straight lengths reach up to 15,000 mm. For precision instrumentation lines, our multi-roll cold pilgering equipment holds OD/WT dimensional tolerances within ±0.03 mm to ±0.05 mm, surpassing standard commercial tolerances. Custom bending, U-bundle configuration, and spool fabrications are manufactured according to client 2D/3D CAD drawings.

While Grade 2 commercially pure titanium functions flawlessly in neutral and oxidizing environments (such as nitric acid, seawater, and chlorine gas), it undergoes accelerated crevice corrosion in hot halide brines when the pH falls below 3 and temperatures exceed 80°C. Grade 7 contains 0.12–0.25% Palladium, which raises the electrochemical open-circuit potential into the passive zone, delivering outstanding resistance to hydrochloric, sulfuric, and phosphoric acid mixtures. Grade 12 provides a cost-effective alternative between Gr2 and Gr7 for high-temperature brine applications up to 260°C where intermediate strength and crevice resistance are required.

Yes. Jovzi provides factory U-bending in accordance with TEMA (Tubular Exchanger Manufacturers Association) standards and ASTM B338. Bending radiuses from 1.5 × OD up to 1,250 mm are cold-formed with internal mandrels. The straight legs and bend arcs are subsequently stress-relieved under vacuum to remove residual cold-work stresses, followed by 100% helium leak or hydrostatic verification and specialized wooden box partitioning for ocean transport.

For standard commercial sizes (e.g., OD 19.05 mm × WT 0.89 mm / 1.0 mm, OD 25.4 mm × WT 1.24 mm in Grade 2), we keep continuous warehouse inventory with no minimum order quantity (MOQ: 1 piece or 1 meter). For custom alloy runs, unique diameters, or OEM draw schedules (e.g., Grade 9 hydraulic lines or Grade 7 chemical conduits), the typical MOQ is 30 kg to 100 kg, with pilot prototype sample runs accommodated. Typical custom mill lead times range between 15 and 28 business days.

Every tube undergoes end deburring, chamfering, and dual-ended polyethylene protective cap sealing to prevent particulate contamination. Individual tubes are plastic-sleeved, arranged in honeycomb structural bundles tied with non-metallic strapping, wrapped in moisture-resistant vapor barrier film, and secured inside reinforced, ISPM-15 compliant export plywood boxes fitted with internal timber supports to prevent bowing and ovality distortion during ocean freight.

Yes. In addition to Jovzi's factory ISO 9001 quality department MTC, we routinely coordinate independent third-party inspections through SGS, TÜV Rheinland, Bureau Veritas, or the specialized BaoTi Test Center (National Center for Quality Supervision and Testing of Non-ferrous Metals). Inspections can include positive material identification (PMI), micro-hardness surveys, chemical spectrography, ultrasonic shear-wave testing, and witnessed hydrostatic trials.