316L Stainless Steel Weld Neck Flange ASME B16.47 8" Class 150
316L Stainless Steel Weld Neck Flange ASME B16.47 8" Class 150
SSM offers premium-grade 316L stainless steel weld neck flanges in compliance with ASME B16.47, specially engineered for large-diameter, high-integrity piping systems operating under corrosive and moderate-pressure conditions.
🔧 Product Summary:
Flange Type: Weld Neck Flange (WN)
Long tapered hub ensures smooth stress distribution through the neck, ideal for repeated thermal cycles
Material: 316L Stainless Steel
Molybdenum-bearing austenitic alloy with low carbon, excellent for chloride-rich and corrosive media
Nominal Pipe Size: 8"
Pressure Class: Class 150
Suitable for moderate-pressure service with corrosion resistance as a priority
Standard: ASME B16.47 Series A/B
Used for flanges above 24", but available in configurations to match 8" pipeline systems
📐 Typical Dimensions for 8" Class 150 (ASME B16.47 Series A)
| Specification | Value |
|---|---|
| Outside Diameter (OD) | 13.50 in |
| Bolt Circle Diameter | 11.75 in |
| Bolt Holes | 8 |
| Bolt Hole Diameter | 0.875 in |
| Hub Length | 3.75 in |
| Flange Thickness | 1.00 in |
| Raised Face (RF) Height | 0.06 in |
(Exact dimensions vary slightly based on Series A/B and manufacturer specifications)
⚙️ Product Features:
Tapered neck improves load bearing between pipe and flange
Excellent weldability and resistance to intergranular corrosion
Withstands chemical, marine, and mildly acidic environments
Reliable sealing under cyclic temperature and pressure conditions
Available with RTJ (Ring Type Joint) or RF (Raised Face) sealing surfaces
🌍 Application Areas:
Petrochemical Processing Units
Power Generation Plants
Offshore Oil Rigs
Refineries and Terminals
Water Treatment & Marine Engineering
🏆 Why Choose SSM:
ASME-compliant manufacturing and third-party inspection available
Tailored machining for Series A or Series B dimensional requirements
All flanges are traceable with full EN 10204 3.1 certification
Surface finishes, coatings, and special testing (PMI, UT, RT) on request
Expert support for large-diameter flange procurement
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