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ANSI B16.5 WELD NECK FLANGE, CARBON STEEL FLANGE

ANSI B16.5 Welding Neck Flange, Size 3 inch, Pressure Class 300, Wall Thickness SCH 80, Material Stainless Steel ASTM A182F304, End Connect Raised Face Flange, Standard ANSI B16.5

STAINLESS STEEL WELD NECK FLANGE, ASTM A182 F316L FLANGE

Stainless Steel Welding Neck Flange, Size 4 inch, Pressure Class 300, Wall Thickness SCH 60, Material Stainless Steel ASTM A182 F316L, End Connect Raised Face Flange, Standard ANSI B16.5

Industrial Flange Solutions: Comprehensive Guide to Blind Flanges, SO Flanges & Weld Neck Flanges

Selecting the right flange is critical for pipeline system safety and efficiency. This guide explores three essential flange types—Blind Flanges, SO Flanges (Slip-On Flanges), and Weld Neck Flanges—detailing their technical specifications, applications, and industry standards to help you optimize your projects.


1. Blind Flange: Reliable Pipeline Termination

Blind flanges are designed to seal pipe ends permanently or temporarily, ideal for pressure testing, maintenance isolation, or future system expansion.

  • Key Features: ASME B16.5/EN 1092-1 certified | Carbon steel/Stainless steel/Duplex options | High-pressure sealing performance

  • Common Uses: Oil & gas storage tanks | Water treatment systems | Industrial equipment inspection ports

2. SO Flange (Slip-On Flange): Cost-Effective Connection

SO flanges offer quick installation and budget-friendly performance for low-to-medium pressure pipelines.

  • Key Features: Dual-welded design for stability | Easy pipe alignment | Reduced labor costs

  • Common Uses: HVAC systems | Food-grade piping | Low-pressure steam lines

3. Weld Neck Flange: High-Performance for Extreme Conditions

Engineered for high-temperature and high-pressure environments, weld neck flanges ensure superior stress distribution and durability.

  • Key Features: Tapered hub welding technology | Fatigue-resistant design | API 6A/ASME B16.25 compliance

  • Common Uses: Subsea oil pipelines | Power plant boilers | Chemical processing reactors


Why Choose Our Flange Products?

✅ Global Certifications: ISO 9001, PED 2014/68/EU, and API Q1 compliant
✅ Custom Solutions: Tailored dimensions, materials (Inconel, Titanium), and face types (RF, FF, RTJ)
✅ Fast Shipping: 20,000+ in-stock flanges | 48-hour expedited delivery for urgent orders