ASME B16.5 316L Weld Neck Flange Supplier
Premium 316L Stainless Steel Weld Neck Flanges (ASME B16.5 Compliant)
1. Product Overview
Standard: ASME B16.5 (Latest Edition)
Material: ASTM A182 F316L
Size Range: ½" to 24" (DN15 to DN600)
Pressure Classes: 150#, 300#, 400#, 600#, 900#, 1500#, 2500#
Face Types: Raised Face (RF), Ring Joint (RTJ)
Temperature Range: -20°F to 1500°F (-29°C to 816°C)
2. Key Advantages of 316L Weld Neck Flanges
✔ Superior Corrosion Resistance (Mo content for chloride environments)
✔ Low Carbon Content (<0.03%) prevents carbide precipitation during welding
✔ Optimized Hub Design for smooth stress distribution
✔ Full Penetration Weld Preparation with 37.5° bevel angle
✔ Full Material Traceability with EN 10204 3.1/3.2 certification
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Yield Strength | ≥170 MPa (25 ksi) |
| Tensile Strength | ≥485 MPa (70 ksi) |
| Elongation | ≥40% |
| Hardness (HRB) | ≤95 |
| PREN Value* | 25-28 |
| Surface Finish | Pickled/Passivated or Electropolished |
*Pitting Resistance Equivalent Number (Cr + 3.3Mo + 16N)
4. Manufacturing Process
Material Sourcing: Certified 316L plates/billets with mill test reports
Forging: Closed-die hammer forging for grain refinement
Heat Treatment: Solution annealing at 1900-2100°F (1040-1150°C)
Machining: CNC-controlled to ±0.05mm tolerance
Testing: 100% dimensional verification + NDE (PT/UT)
5. Quality Assurance
Material Certification: EN 10204 3.1 with PMI verification
NDE Testing: Liquid penetrant (PT) for surface defects
Dimensional Checks: Per ASME B16.5 Tables 5-8
Hydrostatic Testing: Optional 1.5x rated pressure
Special Testing: IGC, SSC (NACE TM0177) available
6. Industry Applications
Offshore Platforms: Seawater cooling systems
Chemical Plants: Acid transfer piping
Pharmaceutical: CIP/SIP process lines
Oil & Gas: Sour service (NACE compliant)
Desalination: High-chloride environments
7. Why Choose Us as Your Supplier?
✔ In-House Manufacturing from forging to finishing
✔ ASME U Stamp Certification for pressure equipment
✔ Competitive Pricing with volume discounts
✔ Global Logistics Network for timely delivery
✔ Technical Support for material selection and welding procedures
8. Available Configurations
Standard: RF, RTJ faces (ASME B16.5)
Special:
Extended hubs for heavy-wall pipe
Reinforced designs for cyclic service
RTJ grooves with spiral serrations
NACE MR0175 compliant options
9. Packaging & Delivery
Standard: Wooden crates with anti-corrosion paper
Marking: Laser etched per ASME requirements
Lead Time:
Standard sizes: 2-3 weeks
Custom sizes: 4-6 weeks
10. Certifications
ASME B16.5
PED 2014/68/EU
NACE MR0175/ISO 15156
ISO 9001:2015
API Q1 (Optional)
Contact us today for:
Immediate quotations on standard sizes
Technical data sheets
Material test certificates
Welding procedure specifications
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