ASME B16.5 & B16.47 Forged Blind Flanges
Solid forged blanking discs designed for high-pressure line isolation, pressure testing, and inspection ports.
ASME B16.5 / B16.47 Forged Blind Flange (BLRF / RTJ)
Starlight Tubes manufactures high-integrity forged Blind Flanges (BLRF / BLRTJ) per ASME B16.5, ASME B16.47 Series A/B, and EN 1092-1 Type 05. Forged from single-piece certified steel billets without welds, our blind flanges deliver outstanding structural strength to resist high hydrostatic shock and bending moments.
Available in carbon steel (A105, A350 LF2), stainless steel (A182 F304L, F316L, F321), Duplex (F51, F53), and Inconel 625. Every blind flange is 100% ultrasonic tested, CNC-faced, and marked with full heat traceability.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — Forged Blind Flanges
Pressure ratings, standard dimensions, and forging specifications for ASME B16.5 Blind Flanges
| Pressure Class | Working Pressure (psi at -29°C to 38°C) | Hydrostatic Shell Test (psi) | Standard Face Types |
|---|---|---|---|
| Class 150# | 285 psi | 450 psi | Raised Face (RF) 1/16" / Flat Face |
| Class 300# | 740 psi | 1125 psi | Raised Face (RF) 1/16" / RTJ |
| Class 600# | 1480 psi | 2225 psi | Raised Face (RF) 1/4" / RTJ |
| Class 900# | 2220 psi | 3350 psi | Raised Face (RF) 1/4" / RTJ |
| Class 1500# | 3705 psi | 5575 psi | Raised Face (RF) 1/4" / RTJ |
| Class 2500# | 6170 psi | 9275 psi | Ring Type Joint (RTJ) |
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ASME B16.5 Forged Weld Neck Flanges
High-pressure forged weld neck flanges (WNRF / RTJ) in carbon steel, stainless steel, duplex, and nickel alloys
ASME B16.5 Forged Slip-On Flanges
Cost-effective forged slip-on raised face (SORF) flanges for easy alignment and dual fillet weld fabrication
ASME B16.5 & B16.47 Forged Flanges
Precision forged and CNC-machined high-pressure piping flanges for offshore, petrochemical, and power generation
Direct Mill Supply for Forged Blind Flanges
Starlight Tubes provides top-grade forged blind flanges with complete MTC EN 10204 3.1, CNC serrated faces, and global export shipping.
Frequently Asked Questions on ASME B16.5 Forged Blind Flanges
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
Blind flanges seal the ends of piping systems or pressure vessel openings, isolating lines during maintenance, hydro testing, or future pipeline expansion.
Request Project Quotation for ASME B16.5 Forged Blind Flanges
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.