ASME B16.48 Stainless Steel Spade Blind Flange
ASME B16.48 Stainless Steel Spade Blind Flange | High-Quality Pipeline Isolation Solution
SSM supplies high-precision ASME B16.48 Stainless Steel Spade Blind Flanges, designed for safe and efficient isolation of piping systems during maintenance, inspection, or repair. Manufactured from premium forged stainless steel, these flanges meet the strict requirements of ASME B16.48 and are available in a full range of pressure classes and sizes.
What Is a Spade Blind Flange?
A Spade Blind Flange, sometimes called a single-plate blind, is a solid metal disc installed between two pipe flanges to stop flow through a section of pipeline. It functions as half of a spectacle blind, used when permanent isolation is required but space or weight constraints make the full spectacle design unnecessary.
ASME B16.48 defines the dimensions, tolerances, pressure ratings, and marking requirements for spades, ring spacers, and spectacle blinds used in flanged piping systems.
Material Options
SSM offers Spade Blind Flanges in a variety of stainless steel grades, including:
ASTM A182 F304 / F304L – general corrosion resistance and good weldability.
ASTM A182 F316 / F316L – superior resistance to chlorides and acidic environments.
ASTM A182 F321 / F347 – stabilized stainless steels for high-temperature applications.
ASTM A182 F51 / F53 / F55 – duplex and super duplex grades for enhanced strength and corrosion resistance.
Each flange is forged, heat-treated, and machined according to industry standards to ensure durability and reliability under demanding service conditions.
Technical Specifications
| Parameter | Description |
|---|---|
| Standard | ASME B16.48 |
| Type | Spade Blind (Single Plate) |
| Material | Stainless Steel (ASTM A182 F304, F316, F321, F51, etc.) |
| Size Range | ½" – 24" (larger sizes on request) |
| Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Face Type | Raised Face (RF) / Flat Face (FF) / Ring Type Joint (RTJ) |
| Testing | PMI, Hydrostatic, Mechanical, and NDT as required |
| Finish | Smooth, Serrated, or Spiral-Finished Faces |
Applications
Oil & Gas pipelines
Chemical and petrochemical plants
Power generation and desalination systems
Marine and offshore structures
Refinery shutdown and maintenance operations
Advantages of SSM Stainless Steel Spade Blinds
Manufactured to ASME B16.48 dimensional accuracy
Corrosion-resistant stainless steel for long service life
Custom sizes, materials, and face types available
Supplied with full traceability and certification (EN 10204 3.1 / 3.2)
Backed by 30+ years of forging and machining expertise
Conclusion
The ASME B16.48 Stainless Steel Spade Blind Flange is an essential component for ensuring safety and reliability in piping systems that require temporary or permanent isolation.
SSM provides high-quality forged spade blinds engineered for strength, precision, and superior corrosion performance - trusted worldwide in critical industrial applications.
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