A Guide to ANSI Flanges and Its Dimensions: Why Yulong Leads the Industry

When it comes to industrial piping systems, ANSI flanges are the backbone of safe and efficient operations. Whether you’re designing a new pipeline or upgrading existing infrastructure, understanding ANSI flange dimensions and specifications is critical. But with so many suppliers in the market, how do you choose the right partner? Enter Yulong, a trusted name in high-performance flanges renowned for precision engineering and unmatched durability. In this guide, we’ll break down ANSI flange standards, dimensions, and why Yulong’s solutions are the smart choice for your project.

What Are ANSI Flanges? 

ANSI flanges (American National Standards Institute flanges) are standardized components used to connect pipes, valves, pumps, and other equipment in industrial systems. They ensure leak-proof seals, withstand extreme pressures, and simplify maintenance. ANSI standards like B16.5 and B16.47 define their dimensions, materials, and pressure ratings, making them universally compatible across industries—from oil and gas to chemical processing.

Yulong’s Edge:
All Yulong ANSI flanges are 100% compliant with ASME/ANSI B16.5 and B16.47 standards.
Available in materials like stainless steel 316, carbon steel, and alloy steel for corrosion resistance.
Third-party tested to handle pressures up to 2,500 PSI.

ANSI Flange Dimensions Decoded 

ANSI flanges come in multiple classes and sizes, each tailored to specific pressure and temperature needs. Here’s a quick breakdown:

1. ANSI B16.5 Flanges
Pressure Classes: 150, 300, 600, 900, 1500, and 2500.
Common Sizes: ½” to 24” diameters.
Key Applications: Ideal for moderate-pressure systems in HVAC, water treatment, and food processing.
Yulong Tip: For high-vibration environments, opt for Yulong’s serrated-face B16.5 flanges to prevent loosening.

2. ANSI B16.47 Flanges (Series A & B)
Pressure Classes: 75 to 900.
Sizes: 26” to 60” diameters.
Key Applications: Heavy-duty oil pipelines, petrochemical plants, and power generation.

Why Yulong?
Yulong’s B16.47 Series B flanges feature reinforced hubs for 30% greater stress resistance.
Custom-bored options available for non-standard pipe dimensions.

Choosing the Right ANSI Flange: A 3-Step Checklist 

Match Pressure Ratings:
Calculate your system’s maximum operating pressure and temperature.
Example: For steam lines at 400°F and 500 PSI, Yulong’s Class 300 stainless steel flanges are a safe pick.

Consider Material Compatibility:
Stainless steel: Corrosive environments (e.g., chemical plants).
Carbon steel: Cost-effective for water and oil.
Alloy steel: High-temperature resistance (e.g., power plants).

Verify Dimensions:
Use Yulong’s free downloadable ANSI flange dimension charts to cross-check bolt holes, thickness, and facing types (RF, FF, RTJ).

Common Mistakes to Avoid with ANSI Flanges 

Mismatched Faces: Pairing a raised-face (RF) flange with a flat-face (FF) flange causes leaks. Always confirm facing types.
Ignoring Gasket Selection: Even the best ANSI flange fails with the wrong gasket. Yulong offers pre-assembled flange-gasket kits for hassle-free installation.
Over-Tightening Bolts: Excess torque distorts the flange. Follow Yulong’s torque specifications guide (included with every order).

Why Engineers Trust Yulong ANSI Flanges 

Precision Manufacturing:
CNC-machined to ±0.001” tolerances for perfect alignment.
Laser-etched markings for easy traceability.

Rapid Delivery:
90% of Yulong’s ANSI flanges ship within 24 hours—no delays for urgent projects.

Cost Savings:
Bulk order discounts: Save up to 15% on orders of 50+ units.
Lifetime warranty against manufacturing defects.

Sustainability Focus:
70% of Yulong’s stainless steel is recycled, reducing your carbon footprint.

Case Study: Yulong ANSI Flanges in Action 

Client: A Texas-based oil refinery
Challenge: Frequent leaks in high-pressure crude oil pipelines due to subpar flanges.
Solution: Yulong recommended Class 600 B16.47 Series A flanges with RTJ (Ring-Type Joint) faces.
Results:
Zero leaks reported in 18+ months of operation.
20% reduction in maintenance costs.

FAQs About ANSI Flanges 

Q: Can I use ANSI flanges with DIN standards? 

A: Yes, but you’ll need adapters. Yulong provides hybrid flanges compatible with both ANSI and DIN systems.

Q: How do I identify a damaged ANSI flange? 

A: Look for cracks, pitting, or warping. Yulong offers free flange inspection guides and replacement discounts.

Q: Does Yulong offer custom ANSI flange dimensions?

A: Absolutely! Submit your specs online for a quote within 4 hours.

Ready to Upgrade Your Piping System?

Whether you’re replacing worn-out flanges or designing a new facility, Yulong’s ANSI flanges deliver reliability you can count on. Download our free ANSI Flange Dimension Guide or contact our experts at sales@ylsteelfittings.com to discuss your project today!