Titanium Blind Flange ASTM B381 ASME B16.5 DIN EN JIS Forged Blocking Flange
Published by Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd on 2026-10-25
1. Product Identity
As a professional titanium manufacturer based in Shaanxi Baoji China, we supply forged titanium blind flange for pipeline end closure and equipment nozzle blank‑off. This fitting acts as solid blocking component for pressure piping systems, widely deployed in chemical plant, salt‑lake lithium, offshore marine and pressure‑vessel projects. Both standard stock items and drawing‑based custom fabrication are available.
2. Core Technical Parameters
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Product Type: Forged Titanium Blind Flange
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Manufacturing Process: Hot forging, stress‑relief annealing, full CNC machining
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Material Grade: Gr1,Gr2,Gr5,Gr7,Gr12 and other titanium grades optional
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Executive Standards: ASTM B381,ASME B16.5,ASME B16.47,DIN,EN,JIS,BS, custom drawing specification
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Application: Corrosive medium pipeline blocking, equipment nozzle isolation, periodic maintenance opening cover
3. Chemical Composition (wt%, ASTM Standard)
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Grade
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Ti
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Fe
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O
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C
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N
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H
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Alloy Elements
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Gr1
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Balance
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≤0.20
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≤0.18
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≤0.08
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≤0.03
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≤0.015
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—
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Gr2
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Balance
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≤0.30
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≤0.25
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≤0.08
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≤0.03
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≤0.015
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—
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Gr5 Ti‑6Al‑4V
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Balance
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≤0.40
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≤0.20
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≤0.08
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≤0.05
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≤0.015
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Al:5.5‑6.8, V:3.5‑4.5
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4. Mechanical & Corrosion Performance
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Tensile Strength: Gr1≥240MPa; Gr2≥345MPa; Gr5≥895MPa
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Yield Strength: Gr1≥170MPa; Gr2≥275MPa; Gr5≥828MPa
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Elongation: Gr1≥24%; Gr2≥20%; Gr5≥10%
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Corrosion Resistance: Resist seawater, brine and chloride‑containing fluid; select Gr7 / Gr12 for reducing acid media to avoid crevice corrosion risk on sealing face.
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Mechanical Feature: Forged microstructure delivers stable pressure‑bearing capacity; sealing face maintains flatness under long‑term bolt pre‑load.
5. Full Size Range
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Nominal Size: DN15‑DN2000 (NPS 1/2"‑80")
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Pressure Class: Class150,300,600,900,1500,2500
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Sealing Face: RF,FF,RJ sealing types for different pressure requirements
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Custom options: Non‑standard diameter, special bolt hole layout, modified thickness per customer drawings.
6. Surface Treatment Options
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Pickling: Remove forging oxide scale, for general‑purpose low‑pressure working conditions.
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CNC machined finish: High‑precision sealing surface, required for RJ high‑pressure flange.
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Sand blasting: Uniform matte surface with low iron contamination risk for marine projects.
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Passivation: Additional anti‑corrosion treatment for coastal and salt‑spray environment.
7. Material Comparison: Titanium Blind Flange vs 316L SS Blind Flange
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Item
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Gr2 Titanium Blind Flange
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316L Stainless Steel Blind Flange
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Chloride medium performance
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Excellent anti‑pitting property
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Prone to pitting corrosion in high‑chloride brine
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Density
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4.51 g/cm³, lightweight
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7.98 g/cm³, heavy dead‑weight
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Sealing‑face corrosion risk
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Low risk under salt‑containing medium
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Local corrosion may cause gasket leakage
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Life‑cycle cost
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Higher initial cost, long service cycle, low maintenance
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Low purchase cost, frequent replacement risk
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Titanium blind flange avoids unexpected shutdown caused by sealing‑face corrosion failure, widely adopted for corrosive process piping.
8. Strict Quality Control & Test Items
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Raw forging billet inspection: Chemical composition and surface defect check.
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Hot forging quality audit: Check internal grain structure, eliminate porosity and shrinkage cavity.
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Full‑dimension inspection: Outer diameter, thickness, bolt‑hole position and sealing‑face flatness measurement.
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NDT inspection: Ultrasonic UT test for internal defects; MPI optional for high‑class pressure flange orders.
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Surface inspection: No scratch, burr or iron contamination on sealing surface.
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Issued documents: EN10204 3.1 MTC, dimension inspection report, NDT record and batch traceability files.
9. Export Packaging & Shipment
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Inner packing: Anti‑rust plastic film and foam cushion to protect precision‑machined sealing surface.
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Outer packing: Fumigated export wooden case with moisture‑proof treatment for sea freight.
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Permanent marking: Laser engrave grade, standard, size and heat number on flange body.
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Trade terms: FOB, CIF, DDP available; sea shipment for bulk goods, air shipment for small urgent batches.
10. Inquiry & Custom Service (Send Your Drawing Now)
We provide standard titanium blind flange stock as well as custom‑made parts complying with DIN,EN,JIS,BS or your special drawings.
Please prepare below information for precise quotation: 1) Applicable standard & pressure class; 2) Nominal size and seal face type; 3) Material grade requirement; 4) Working medium, temperature and pressure; 5) Order quantity and delivery schedule.
Website: www.sxqytd.com
Contact us for technical selection suggestion and formal quotation.