AWWA Flanges

Industrial-Grade AWWA Steel Flanges: Reliable Solutions for Global Waterworks Infrastructure

In the field of municipal water treatment and low-pressure piping, the integrity of every connection is paramount. As a premier forged steel flange manufacturer, we provide a comprehensive range of AWWA-standard steel flanges designed to meet the rigorous demands of the American Water Works Association.
Whether you are a large-scale stockist or a trading partner managing infrastructure projects, our facility offers the production capacity and technical precision required for leak-free, long-term performance in fluid transport systems.

AWWA C207 & C228 Standards Steel Flange

We don’t just manufacture flanges; we engineer them to exact specifications. Our production lines are optimized for:
AWWA C207: Specialized for high-quality carbon steel flanges used in waterworks service.
AWWA C228: Dedicated to stainless steel flange solutions where superior corrosion resistance is a necessity.
These standards ensure that every forged steel flange—from its drilling pattern to its material density—complies with the maximum allowable pressure ratings and dimensional tolerances required for municipal safety.

AWWA Flange Profiles

We supply three primary configurations tailored for waterworks applications:
AWWA Slip-On Flanges (SO): Designed to slide over the pipe end, our slip-on flanges are engineered for easy alignment and double-welding stability, ensuring a robust joint for water mains.
AWWA Blind Flanges (BL): High-strength sealing solutions used to terminate piping sections or provide access points for future system expansion.
AWWA Hub & Ring Flanges: Manufactured to match C207 and ANSI #150 bolt patterns, these are the industry standard for connecting pumps, valves, and heavy-duty waterworks equipment.

Pressure Classes & Materials

AWWA flanges are the go-to choice for light-duty, high-volume applications (typically up to 300 psi). We specialize in the most sought-after pressure ratings for Traders and Stockists:

• Class D (The Industry Standard): Rated at 175 psi for sizes <12″ and 150 psi for larger diameters.
• Class B, E, and F: Full coverage for varied pressure requirements.
  Material Portfolio: ASTM A105 Carbon Steel, 304L, and 316L Stainless Steel.
  Size Range: Comprehensive production from standard sizes up to 144-inch ultra-large diameters.

Industrial Applications:

Our forged AWWA flanges are currently serving critical roles in:

• Municipal Waterworks: Potable water distribution and transmission.
• Wastewater Treatment: Slurry and plant piping systems.
• Irrigation & Hydro-projects: Large-scale fluid management.
• Industrial Cooling: Low-pressure plant piping.

Why Choose Our Factory for Bulk Procurement?

As a B2B-focused supplier, we understand that traders and stockists need more than just a product—they need a reliable supply chain.

• Direct Factory Advantage: Eliminate middlemen costs with competitive factory-direct pricing.
• Scalable Production: Whether it’s a full container of Class D Slip-ons or custom-coated large-diameter rings, we handle high-volume orders with ease.
• Custom Coating & Finishing: We provide specialized surface treatments (anti-rust oils, black paint, or epoxy coatings) to protect your inventory during long-term storage or sea transit.
• Technical Support: Every batch is backed by a full Material Test Certificate (MTC) and rigorous QC inspection reports.

Technical FAQ:

1. What defines an AWWA flange?
AWWA flanges are specifically engineered for the waterworks industry. While they share some bolt patterns with ANSI/ASME standards, they are optimized for lower-pressure applications (300 psi or less), making them a more cost-effective solution for municipal projects compared to high-pressure industrial flanges.
2. How do AWWA and ANSI/ASME B16.5 flanges differ?
The primary difference lies in the application and pressure rating. ANSI/ASME B16.5 is designed for high-pressure industrial processes (Refineries, Oil & Gas), whereas AWWA is the standard for water infrastructure. AWWA covers much larger diameters (up to 144″) than B16.5, which typically stops at 24″.
3. Is the bolt pattern for AWWA C207 the same as ANSI 150?
Yes, in many common sizes, AWWA Class D and E flanges share the same drilling patterns as ANSI B16.5 Class 150, allowing them to be mated with valves and pumps designed for ANSI standards. However, the flange thickness and hub dimensions may vary, so always verify specifications before procurement.