ASME B16.5 Compliance
Engineered strictly to ASME/ANSI B16.5 and B16.47 Series A/B, covering sizes 1/2" up to 60" from Class 150 through Class 2500 with zero bolt-hole pitch deviation.
2006Year Established
19+Global Export Years
100tAnnual Output Capacity
83.02%Response Rate
≤8hRapid Response
BaoTiCertified Inspection
ISO 9001 · BaoTi TestedAuthorized test certificates & EN 10204 3.1 MTCs on all orders
Enterprise Authority & Heritage
Forged in China's Titanium Valley: Jovzi Titanium Industry Co., Ltd.
Established in 2006, Jovzi Titanium Industry Co., Ltd. is an ISO 9001:2000-certified enterprise specializing in the precision machining, custom forging, manufacturing, and global sales of Titanium, Nickel, Tantalum, Molybdenum, Tungsten, and composite non-ferrous engineering equipment.
Located in Baoji — the metallurgical heartland responsible for over 80% of China's titanium mill output — Jovzi operates with profound manufacturing expertise and an elite technical force. Our multidisciplinary engineering team features 4 senior industry experts and 5 intermediate metallurgical engineers. Every single batch of Titanium ANSI Blind Flanges and pressure components manufactured by our plant undergoes stringent testing, accompanied by authorized quality test certificates issued by the prestigious BaoTi Test Center.
Adhering firmly to our operating principles of "Strengthen management, Sincerity first, Best quality, and Continuous innovation", we maintain long-term industrial partnerships with demanding engineering contractors across Germany, the United States, Canada, Belgium, Japan, India, and Taiwan. Our annual processing capacity is expanding rapidly past 100 metric tons, supporting offshore exploration, chemical chlorination plants, nuclear energy, marine desalination, and aerospace platforms.
- Business Type
- OEM Manufacturer & Exporter
- Annual Capacity
- Expanding 100+ Tons
- Technical Force
- 4 Senior & 5 Intermediate Experts
- Inspection Body
- BaoTi Test Center Certified
Deep Technical Knowledge
Engineering Precision: Titanium ANSI Blind Flange Architecture
Understanding pressure-temperature derating, gasket sealing surface mechanics, and metallurgical grade selection for critical terminal pipeline shutoff.
Controlled Forging Integrity
Forged per ASTM B381 / ASTM B348. Optimized grain structure through controlled recrystallization eliminates internal shrinkage, porosity, and gas voids.
Surface Serration Standards
Precision CNC face finishes: Concentric or Spiral Serrated Raised Face (RF) with Ra 3.2–6.3 µm (125–250 µin) or Ring-Type Joint (RTJ) octagonal grooves with Ra ≤ 1.6 µm.
Crevice Corrosion Immunity
Advanced Grade 7 (Ti-0.15Pd) and Grade 12 (Ti-0.3Mo-0.8Ni) blind flanges engineered specifically to eliminate micro-crevice attack beneath high-load gaskets.
Factory Direct Supply
Recommended Titanium ANSI Blind Flange Configurations
High-integrity blind flanges manufactured for direct deployment in critical pipelines, heat exchangers, reactors, and offshore process skids.
ASME B16.5
ASTM B381 Gr2 ANSI Blind Flange (Class 150/300)
- Material ASTM B381 F-2 / Gr2
- Facing Raised Face (RF) Serrated
- Size 1/2" to 24" (DN15–DN600)
- Testing BaoTi Center Mechanical + UT
Severe Service
ASTM B381 Gr7 Palladium ANSI Blind Flange
- Alloy Ti-0.15Pd (UNS R52400)
- Condition High Hot-Acid Crevice Proof
- Rating Class 300 / 600 / 900
- MTC EN 10204 3.1 Traceable
Heavy Forging
Large-Diameter Titanium Blind Flange (B16.47)
- Standard ASME B16.47 Series A/B
- Dimensions Up to OD 1074 mm
- Grade F-2, F-5, F-12 Forged
- Inspection 100% Ultrasonic Testing
High Pressure
High-Pressure RTJ Titanium Blind Flange
- Facing Ring Type Joint (RTJ Grooved)
- Class 600, 900, 1500, 2500
- Material Gr5 (Ti-6Al-4V) / Gr12
- Application Subsea & Downhole Oil/Gas
Metallurgical Comparison
Titanium ANSI Blind Flange Material Selection Matrix
Compare standard chemical, mechanical, and operational parameters to optimize engineering safety and procurement spend.
| Forging Grade | UNS Code | Min. Tensile (MPa) | Min. Yield 0.2% (MPa) | Corrosion Resistance Behavior | Recommended ANSI Flange Applications |
|---|---|---|---|---|---|
| ASTM B381 F-1 | R50250 | 240 | 170 | Exceptional ductility; optimal in mild oxidizing fluids | Low-pressure duct isolation, venting blinds, mild brine lines |
| ASTM B381 F-2 | R50400 | 345 | 275 | Benchmark CP grade; excels against seawater, chlorides, nitric acid | Industry workhorse for ASME B16.5 Class 150 & 300 chemical process pipelines |
| ASTM B381 F-5 | R56400 | 895 | 828 | Ultra-high strength-to-density ratio; excellent fatigue limit | Subsea manifolds, aerospace testing blanks, Class 900 to 2500 high-pressure terminations |
| ASTM B381 F-7 | R52400 | 345 | 275 | 0.15% Palladium addition prevents hot reducing acid & crevice corrosion | Wet chlorine headers, concentrated brine heaters, low-pH chlor-alkali systems >80°C |
| ASTM B381 F-12 | R53400 | 483 | 345 | 0.3% Mo + 0.8% Ni enhances elevated-temp resistance at reduced cost vs Pd | High-temperature brine lines, sour crude hydrocarbon processing, Class 300/600 valves |
Mechanical and chemical values guaranteed strictly per ASTM B381 / ASME SB-381 specifications. Chemical composition and tensile figures are verified per furnace melt lot and reported on the mill test certificate.
Market Intelligence & Procurement Forecast
Future Sourcing Trends for Titanium Blind Flanges
As global energy, green hydrogen, and advanced desalination infrastructure modernize, engineering procurement teams face shifting cost structures, sustainability mandates, and technical demands:
- Clean Hydrogen & Electrolyzer Transition: Surging demand for ASTM B381 Gr2 and Gr7 blinds in polymer electrolyte membrane (PEM) stacks due to absolute zero iron-ion leaching.
- Total Cost of Ownership (TCO) Prioritization: Shifting away from duplex steel (2205/2507) toward Grade 2 titanium blinds to eliminate repetitive downtime and premature replacement costs in marine plants.
- Strict 100% Non-Destructive Testing Mandates: Global buyers now require 100% volumetric Ultrasonic Testing (UT per ASTM A388) and Liquid Penetrant Testing (PT) to verify forging continuity.
- Near-Net-Shape Forgings: Raw material efficiency is reducing scrap ratios, keeping premium Grade 7 and Grade 12 pricing competitive against specialty superalloys.
Industry Technology Evolution
Technological & Manufacturing Developments
How cutting-edge metallurgical forging, multi-axis CNC machining, and automated QA are reshaping titanium pressure vessel piping components.
Isothermal Closed-Die Forging
Transitioning from open hammer to computerized closed-die hydraulic forging optimizes grain boundaries and minimizes post-machining material loss on heavy blind flanges.
Sub-Micron Face Geometry
High-torque multi-axis CNC turn-mill stations achieve sub-micron precision for Raised Face serrations and RTJ octagonal grooves, ensuring zero bubble leakage under high-pressure gas tests.
Direct BaoTi Test Verification
Comprehensive third-party validation by the state-authorized BaoTi Test Center verifies tensile strength, yield elongation, micro-metallography, and spectrographic chemistry per heat.
Severe Acid Palladium Chemistry
Optimizing micro-palladium and ruthenium alloying allows Jovzi Grade 7 and Grade 12 blinds to withstand high boiling-point reducing mineral acids without pitting or crevice attack.
Procurement Knowledge Base
Titanium ANSI Blind Flange: Frequently Asked Questions
Answers to common metallurgical, operational, and commercial questions raised by international piping engineers and sourcing teams.
What is the functional difference between a Titanium Blind Flange and Spectacle Blind Flange?
A Titanium ANSI Blind Flange (BLRF or BLRTJ per ASME B16.5) is a solid forged disc engineered to terminate or positively seal the end of a piping run, pressure vessel nozzle, or bypass manifold permanently or during extended shutdowns. In contrast, a Titanium Spectacle Blind Flange (figure-8 blank per ASME B16.48) consists of a solid blank and an open spacer connected by a web, designed for lines that require frequent switching between full flow and positive shutoff during routine maintenance or pipeline pigging operations without decoupling the joint. Jovzi manufactures both configurations across all pressure classes.
When should engineers specify ASTM B381 Grade 7 over Grade 2 for ANSI blind flanges?
While ASTM B381 Grade 2 is the cost-effective benchmark for seawater, marine atmospheres, and oxidizing acids (such as nitric acid), it remains susceptible to localized crevice corrosion in stagnant chloride environments exceeding 75°C to 80°C or in non-oxidizing acids (hydrochloric, sulfuric). Grade 7 contains 0.12%–0.25% Palladium (Pd), which acts as a powerful cathodic depolarizer. This shifts the corrosion potential of the alloy into the stable passive region, effectively preventing crevice corrosion under gaskets even in boiling brine, wet chlorine, and low-pH acidic solutions. When sealing hot chloride media under high gasket compression, Grade 7 guarantees zero leakage and extended equipment life.
How does Jovzi ensure ASME B16.5 dimensional and pressure rating compliance?
Jovzi Titanium Industry Co., Ltd. operates advanced CNC turning and vertical boring centers with calibrated tool paths that adhere strictly to ASME B16.5 dimensional tables. Critical parameters—including outside diameter (OD), bolt circle diameter (BCD), bolt hole diameter, thickness (T), and raised face height (6.3 mm for Class 300+ or 1.6 mm for Class 150)—are checked with coordinate measuring equipment and certified thread gauges. Every flange is manufactured from solid forged billets conforming to ASTM B381, ensuring that working pressures up to 2500 psi meet or exceed ASME Section VIII pressure vessel design rules.
What surface finish is provided on the raised face of Jovzi titanium blind flanges?
Per ASME B16.5 Section 6.4.5, Jovzi produces standard raised faces with a serrated concentric or spiral finish having an average surface roughness (Ra) of 3.2 µm to 6.3 µm (125 to 250 microinches), generated using a 1.6 mm radius round-nosed tool at an exact feed rate. This specific roughness allows the gasket material (e.g., expanded PTFE, graphite, or titanium-jacketed kammprofile) to flow into the microscopic serrations, establishing an impermeable seal under specified bolt preload. For Ring Type Joint (RTJ) flanges, our groove surface roughness is kept strictly below Ra 1.6 µm (63 microinches).
What quality documentation and third-party inspection certificates are supplied?
Every delivery includes a comprehensive documentation pack: EN 10204 Type 3.1 Inspection Certificate specifying heat number, wet chemical composition, and ambient tensile/yield/elongation test data. Furthermore, as an authorized vendor backed by Baoji's world-class testing infrastructure, Jovzi provides authoritative third-party physical and chemical inspection reports issued by the BaoTi Test Center. Non-destructive examination reports (100% Ultrasonic Testing per ASTM A388 and Liquid Penetrant Testing per ASTM E165) and PMI spectral verification reports are provided as standard quality deliverables.
What are your typical order MOQs, lead times, and global shipping options?
Our flexible production lines cater to both rapid-replacement emergency repairs and major project expansions. The MOQ for standard Titanium ANSI Blind Flanges is 1 piece. Standard sizes (1/2" through 12", Class 150/300) in Grade 2 are regularly maintained in semi-finished billet stock and can be machined, inspected, and dispatched within 5 to 10 working days. Custom forgings (up to OD 1074 mm) typically require 15 to 25 days. Jovzi offers flexible Incoterms including FOB, CIF, CFR, EXW, DDP, and door-to-door express air delivery (DHL/FedEx/UPS) packed in sturdy, export-standard fumigated wooden crates.
Enterprise Credentials & Reliability
Why Choose Jovzi Titanium Industry Co., Ltd.?
Over 19 years of uncompromised metallurgical excellence, deep engineering talent, and trusted global supply chains.
Established Since 2006
Founded in 2006, Jovzi has accrued nearly two decades of precision manufacturing experience in non-ferrous metals, chemical equipment design, and pressure components.
Learn MoreElite Engineering Force
Our workforce features 4 senior industry specialists and 5 intermediate engineers, ensuring rigorous metallurgical review, CAD analysis, and customized OEM fabrication.
Send an InquiryBaoTi Test Center Certified
All titanium products are certified by the state-authorized BaoTi Test Center. Chemical composition and mechanical properties conform 100% to ASME/ASTM specifications.
View Credentials100-Ton Expanding Capacity
With an annual processing capacity accelerating beyond 100 metric tons, we provide stable ingot-to-part pricing, bulk delivery guarantees, and high inventory reliability.
Capacity DetailsGlobal Long-Term Alliances
Supplying critical engineering contractors across the USA, Germany, Canada, Belgium, Japan, India, and Taiwan, backed by our international arm Shaanxi Lihua Import & Export.
Trade RecordsPrompt Response ≤8 Hours
Our dedicated commercial and technical department boasts an 83.02% response rate, committing to comprehensive formal engineering quotations within 8 working hours.
Send an Inquiry Connect With Our Technical Engineers
Request a Detailed Engineering Quote
Our team of senior metallurgists and pricing analysts will calculate sizing, material optimization, and expedited freight schedules for your Titanium ANSI Blind Flanges:
- Nominal Pipe Size (1/2" to 60")
- Pressure Class (150 to 2500)
- Titanium Grade (Gr1, Gr2, Gr5, Gr7, Gr12)
- Facing Style (RF Serrated, Flat Face, RTJ)
- BaoTi Test Center Inspection Requirements
- Target Delivery Incoterm & Port
Jovzi Titanium Industry Co., Ltd.
Direct Engineering Inquiries [email protected]
Headquarters & Manufacturing Facility No. 3, Gaoya Industrial Zone, Bayu Town, High-Tech Development Zone, Baoji, Shaanxi, China
Guaranteed Inquiry Response Time Within 8 Hours (Official Technical Reply)