ASME B16.48 Spectacle Blinds
Precision-Engineered Spectacle Blinds for Critical Isolation Applications
1. Product Overview
Standard: ASME B16.48 (Latest Edition)
Materials: ASTM A240 304/304L, 316/316L, 347, Duplex 2205
Size Range: ½" to 24" (DN15 to DN600)
Pressure Classes: 150#, 300#, 400#, 600#, 900#, 1500#
Design Types:
Type SP - Single plate
Type SPL - Spacer/long pattern
Type SR - Ring spacer
Temperature Range: -20°F to 1000°F (-29°C to 538°C)
2. SSM Manufacturing Advantages
✔ Laser-Cut Profiles - ±0.005" dimensional accuracy
✔ Integrated Alignment Pins - For perfect flange matching
✔ Dual-Sided Marking - Permanent laser etching
✔ Custom Thickness Options - Up to 4" (100mm) available
✔ Full Material Traceability - EN 10204 3.2 certification
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Thickness Tolerance | ±0.01" (0.25mm) |
| Surface Finish | 125-250 μin Ra (standard) |
| Bore Alignment | ±0.5° angular tolerance |
| Pressure Rating | Matches ASME B16.5 equivalent flanges |
| Dimensional Standard | ASME B16.48 Table 2 |
4. Material Selection Guide
| Material | ASTM | Max Temp (°F) | Best Application |
|---|---|---|---|
| 304/304L | A240 | 1500 | General purpose |
| 316/316L | A240 | 1500 | Corrosive services |
| 347 | A240 | 1500 | High-temperature |
| Duplex 2205 | A240 | 600 | Chloride environments |
5. SSM Production Process
Precision Blanking - Waterjet cutting for stress-free edges
CNC Machining - 5-axis milling for perfect profiles
Surface Treatment - Electropolishing available
Quality Verification - 3D scanning inspection
Testing - Dye penetrant on all welds (if applicable)
6. Enhanced Features (SSM Exclusive)
Quick-Change Design - With lifting lugs
Teflon-Coated Options - For sticky media
RFID Tagged Blinds - Digital asset tracking
High-Visibility Paint - Safety yellow/red standard
Insulating Kits - For cathodic protection
7. Industry Applications
Refineries: Process line isolation
Chemical Plants: Maintenance safety
Power Plants: Turbine isolation
Pipeline Systems: Sectional testing
Pharma: Clean-in-place systems
8. Why Choose SSM Spectacle Blinds?
✔ ASME B16.48 Full Compliance
✔ 30% Faster Delivery than industry standard
✔ Custom Marking per customer specifications
✔ NACE MR0175 Options for sour service
✔ Complete Isolation Kits (With gaskets & hardware)
9. SSM Quality Assurance
100% Dimensional Verification
Material Certification with PMI reports
Hardness Testing per ASTM E18
Surface Roughness Measurement
Third-Party Inspection available
10. Certifications
ASME B16.48
PED 2014/68/EU
NACE MR0175/ISO 15156
ISO 9001:2015
API 598 (Leak Testing)
Contact SSM Manufacturing for:
Emergency replacement blinds
Custom material requests
CAD models in multiple formats
Pressure rating calculations
Bulk order discounts
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