Stainless Steel Blind Flanges

​Product Overview

Stainless Steel Blind Flanges are essential for sealing pipe ends, vessel openings, or valve connections in high-pressure systems across oil & gas, chemical, and water treatment industries. Manufactured from ​316L, Duplex 2205, and other corrosion-resistant grades, and compliant with ​ASME B16.5, ​EN 1092-1, and ​API 6A standards, these flanges ensure leak-proof isolation during maintenance, testing, or system upgrades.

​Product Specifications

​Material & Manufacturing

• Grades: 304, 316L, 321, Duplex 2205, Super Duplex 32750
• Standards: ASTM A182, ASME B16.5, EN 1092-1 (Type 05)
• Surface Finish: Polished (Ra≤0.8μm), Pickling & Passivation, Sandblasted

Design & Dimensions

• Face Types: Raised Face (RF), Flat Face (FF), Ring-Type Joint (RTJ)
• Thickness: Optimized for pressure ratings (Class 150 to Class 2500)
• Manufacturing: Forged or CNC-machined from stainless steel plate

​Size & Pressure

• Diameter Range: 1/2″ to 60″ (DN15-DN1500)
• Pressure Rating: Class 150 to Class 2500 (PN10-PN420)
• Temperature Range: -196°C to 450°C (cryogenic to high-heat conditions)

​Key Advantages

✅ ​Zero Leakage: Precision-machined sealing surfaces with 100% hydrostatic test compliance.
✅ ​High-Pressure Integrity: Withstands up to ​6,000 PSI for critical isolation tasks.
✅ ​Corrosion Resistance: Ideal for acidic, alkaline, and marine environments (NACE MR0175 certified).
✅ ​Customization: Non-standard diameters, bolt-hole patterns, and cladding options (e.g., Inconel overlay).

​Applications

• ​Oil & Gas: Pipeline pressure testing, wellhead isolation
• ​Chemical Plants: Reactor maintenance, temporary system shutdowns
• ​Water Treatment: Pipe end sealing during system expansion
• ​Power Plants: Boiler and turbine maintenance isolation
• ​Shipbuilding: Ballast tank and fuel line blanking

Certifications

• ISO 9001:2015, CE, PED 2014/68/EU, API 6A
• NACE MR0103 (sulfide stress cracking resistance)
• Full material traceability (MTC) with PMI verification

​Packaging & Logistics

• ​Export Packaging: Heavy-duty wooden crates with anti-corrosion coating and edge guards.
• ​Shipping: FOB/CIF/DAP terms; bulk project discounts available.
• ​Lead Time: 10-20 days (standard), 25-35 days (customized).

​Why Partner With TOKO TECH?

🔹 ​In-House Expertise: CNC machining centers for tight tolerance control (±0.1mm).
🔹 ​Technical Support: Free flange thickness calculations per ASME Section VIII.
🔹 ​Quality Assurance: 100% UT (ultrasonic testing) for internal defects.
🔹 ​Global Reach: Fast-track delivery to the Middle East, Europe, and APAC regions.