Precision Titanium Components & Specialized Mill Products
Alongside our custom-forged titanium weld neck flanges, Jovzi manufactures advanced non-ferrous hardware engineered for demanding chemical processing, electrochemical anodizing, motorsport piping, and biomedical applications.
Engineering Whitepaper: Titanium Weld Neck Flanges (Vorschweißflansche)
In high-integrity industrial piping networks subjected to extreme thermal cycling, severe vibration, and aggressive corrosive media, the Weld Neck Flange (designated as DIN EN 1092-1 Typ 11 in the European standard and WNF under ASME B16.5 / B16.47) stands as the gold standard of flange connections. Unlike slip-on, blind, or socket-weld alternatives, a weld neck flange incorporates a long tapered hub that transitions gradually into the matching wall thickness of the seamless or longitudinal-welded titanium process pipe.
This gradual geometric taper provides indispensable mechanical reinforcement by redistributing concentrated circumferential hoop stresses and bending moments away from the flange ring directly into the pipe body. The resulting butt-welded joint can be fully inspected through non-destructive examination (NDE) methods—specifically 100% Volumetric Radiographic Testing (RT) or Ultrasonic Testing (UT)—which is often mandatory under German plant safety regulations including the Pressure Equipment Directive (PED 2014/68/EU) and AD 2000-Merkblatt HP 0 / HP 5/3.
Technical Specification Matrix: Titanium Flange Alloys
German EPC engineers typically specify pure titanium for general chemical immersion or specialized platinum-group alloyed titanium grades when handling hot reducing acids and acidic chlor-alkali brines. Below is the chemical, mechanical, and standard cross-reference applied during Jovzi's forging inspection:
| Titanium Grade | German Werkstoff-Nr. | Standard & Form | Yield Strength (Rp0.2 Min) | Tensile Strength (Rm Min) | Primary European Media Compatibility |
|---|---|---|---|---|---|
| Titanium Grade 1 | W.Nr. 3.7025 | ASTM B381 F1 / EN 1092-1 | 170 MPa | 240 MPa | Mild oxidizing chemicals, deep-drawing expansion bellows, nitric acid. |
| Titanium Grade 2 | W.Nr. 3.7035 | ASTM B381 F2 / DIN 28011 | 275 MPa | 345 MPa | Seawater cooling, wet chlorine gas, sodium hypochlorite, petrochemical heat exchangers. |
| Titanium Grade 5 (Ti-6Al-4V) | W.Nr. 3.7165 | ASTM B381 F5 / AMS 4928 | 828 MPa | 895 MPa | High-pressure hydraulic manifolds, offshore subsea tie-ins, aerospace structural fittings. |
| Titanium Grade 7 (Ti-0.15Pd) | W.Nr. 3.7235 | ASTM B381 F7 / DIN 17866 | 275 MPa | 345 MPa | Severe hydrochloric and sulfuric acid mixtures, low pH chloride solutions, flue gas scrubbers. |
| Titanium Grade 12 (Ti-0.3Mo-0.8Ni) | W.Nr. 3.7105 | ASTM B381 F12 / EN Type 11 | 345 MPa | 483 MPa | Elevated temperature brine concentration, crevice corrosion resistance up to 300°C. |
Radial Grain Flow Alignment
Unlike plate flanges cut from rolled sheets, our weld neck flanges are hot-forged via closed dies and high-tonnage ring expanders. This aligns the crystalline grain flow along the taper hub and flange face, eliminating mechanical delamination under high cyclic pressure.
Precision CNC Weld Beveling
Weld ends are machined precisely to ASME B16.25 or DIN EN ISO 9692-1 bevel geometry (37.5° ± 2.5° with 1.6mm root face). This guarantees precise alignment with Schedule 10S, 40S, or 80S titanium process piping for automated orbital TIG welding.
BaoTi Certified Metallography
Every production heat undergoes stringent chemical spectroscopy, room and elevated temperature tensile testing, Charpy V-notch impact validation, and 100% dye penetrant (PT) examination in compliance with DIN EN ISO 3452-1 standards.
Engineered for Germany's Key Industrial Hubs
Germany's industrial economy is defined by stringent safety protocols, environmental stewardship, and engineering precision. Jovzi's titanium weld neck flanges are specifically tailored to meet the demands of Germany's specialized industrial clusters.
Chemical Triangles
Operating across Chempark Leverkusen, Dormagen, Krefeld-Uerdingen, and the Leuna Chemical Complex. Gr2 and Gr7 flanges provide absolute resistance to wet chlorine, bleaching chemicals, and concentrated nitric acid streams.
Green H2 Infrastructure
Serving hydrogen valley projects across North Rhine-Westphalia (NRW) and Lower Saxony. Titanium weld neck flanges eliminate hydrogen embrittlement risks in Proton Exchange Membrane (PEM) electrolyzer manifolds.
North & Baltic Offshore Wind
Offshore HVDC converter platforms (e.g., BorWin, DolWin, HelWin clusters) utilize Gr2 titanium weld neck flanges in central seawater cooling cooling loops, fire-deluge systems, and ballast handling where pitting corrosion is completely unacceptable.
Pharma & Biotechnology
Supplying facilities in Baden-Württemberg, Bavaria, and Hesse. Ultra-clean titanium forged surfaces ensure zero metallic ion leaching, total biocompatibility, and easy CIP/SIP steam sterilization in API chemical synthesis.
German Quality Certifications & EU Compliance Architecture
Procurement teams in Germany face strict statutory liabilities under the German Equipment and Product Safety Act (ProdSG). Jovzi provides end-to-end documentation packages ensuring smooth approval by inspecting bodies like TÜV Rheinland, TÜV SÜD, and DEKRA.
PED 2014/68/EU Annex I
All pressure equipment components comply with essential safety requirements of the European Pressure Equipment Directive. Titanium forgings feature documented mechanical properties, impact tests at design minimum temperatures, and verified elongation exceeding statutory limits.
AD 2000-Merkblatt W13 / W2
For boilers and pressure vessels deployed under German jurisdiction, our production tracks technical rules for metallic materials under AD 2000 code. We furnish verified chemistry limits and thermal annealing records confirming stable alpha-phase microstructures.
DIN EN 10204 3.1 & 3.2 MTC
Each delivery includes a certified EN 10204 3.1 Mill Test Certificate directly identifying the Baoji melting ingot heat number. Third-party witnessed EN 10204 3.2 inspection (by TÜV, Lloyd's Register, or DNV) is available upon project reservation.
Alignment with the German Supply Chain Due Diligence Act (Lieferkettensorgfaltspflichtengesetz - LkSG)
German corporate buyers subject to the LkSG require verifiable ESG transparency across Tier-1 and Tier-2 suppliers. Jovzi strictly adheres to ISO 14001 environmental management standards and ISO 45001 occupational health guidelines. We enforce complete auditability from titanium sponge sourcing in Shaanxi through closed-loop mechanical scrap recycling, ensuring full alignment with German corporate compliance audits.
Why Jovzi Titanium Industry Co., Ltd. Stands Out
Founded in 2006 in Baoji, Shaanxi—globally renowned as China's Titanium Valley—Jovzi integrates regional raw material advantages with sophisticated CNC machining and certified forging capabilities.
Direct Titanium Valley Hub
Baoji accounts for over 60% of China's titanium mill product supply. We maintain direct sponge melting and billet forging contracts, securing premium ingot chemistry and shielding our European partners from international spot market volatility.
19+ Years International Track Record
Over 85% of our annual production is exported to demanding markets across Germany, Western Europe, and North America. Our engineering department comprises 4 senior and 5 intermediate metallurgical engineers familiar with DIN and ASME standards.
Heavy Forging & CNC Capacity
Our plant houses precision hydraulic forging hammers, ring rolling units producing seamless rings up to 1074 mm OD, and multi-axis CNC lathe centers achieving tight tolerances of ±0.05 mm on flange sealing faces and bolt hole circles.
Certified Six-Stage Quality Assurance Workflow
Frequently Asked Questions by German Engineering Buyers
Answers to technical, logistical, and compliance questions commonly raised by German Einkaufsleiter (Heads of Procurement), project managers, and quality assurance inspectors.
Can Jovzi manufacture titanium weld neck flanges to both DIN EN 1092-1 Typ 11 and ASME B16.5?
How do you guarantee EN 10204 3.1 certification and third-party inspection in Germany?
What are the standard delivery lead times and Incoterms for shipments to Germany?
What weld preparation standards are applied to ensure compatibility with German pipe schedules?
How does Jovzi prevent cross-contamination and embrittlement during titanium machining?
What is the Minimum Order Quantity (MOQ) for custom-forged titanium flanges?
Connect Directly with Our Titanium Engineering Specialists
Need rapid quotations for DIN EN 1092-1 Typ 11 Vorschweißflansche or ASME B16.5 titanium flanges? Submit your RFQ package, CAD files, or technical specifications today. Our engineering team guarantees a detailed response with full metallurgical confirmation within 8 hours.