AWWA C207/C228 Spec Update: What Changed for 22″ Class-F Flanges
In 2023, The American Water Works Association (AWWA) has issued a specification revision affecting the bolt hole diameter for 22″ Class-F flanges. This revision is applicable to Carbon Steel (AWWA C207 Class F) and Stainless Steel (AWWA C228 Class SF) materials, in both Slip-On and Blind configurations. It means that engineers, procurement teams, and contractors […]
What’s Better for Sealing? Threaded vs Socket Weld Flanges
On the surface, choosing between threaded and socket weld flanges can seem like a minor detail. In reality, the sealing performance difference between the two is meaningful. This guide breaks down how each connection works, where each performs well, where each falls short, and how to choose between them for your specific applications. 1. How […]
How Threaded Pipe Flanges Work in Piping Systems
Threaded pipe flanges are widely used across industrial, commercial, and municipal piping systems. Selecting the right one for a specific application involves more than just choosing a pipe size. Before specifying or installing a threaded pipe flange, engineers and procurement teams need to understand the governing standards, pressure classes, pressure-temperature ratings, face types, dimensions, and […]
Domestic A36 Flanges: Properties, Types, and Applications
Domestic ASTM A36 is one of the most commonly specified carbon steel grades in American manufacturing. The combination of low carbon content, reliable weldability, and domestic availability makes it a practical choice across a wide range of industrial applications, which includes A36 flanges. This blog post explains what domestic ASTM A36 carbon steel is, why […]
Key Information to Know Before Using Threaded Flanges
Threaded companion flanges are widely used across industrial, commercial, and municipal piping systems. Selecting the right one for a specific application involves more than just choosing a pipe size. Before specifying or installing a threaded flange, engineers and procurement teams need to understand the governing standards, pressure classes, pressure-temperature ratings, face types, dimensions, and material […]
All About Threaded Companion Flanges (From Selection to Installation)
Not every piping connection can be welded. In explosive atmospheres, remote locations, or systems requiring regular disassembly, threaded companion flanges provide an essential alternative. Standardized under ANSI/ASME B16.5 and used across oil & gas, process, and utility piping systems worldwide, they are one of the most practical small-bore connection solutions available. This guide covers the main […]
Why Choose Plate Flanges?
Plate flanges are cut or machined from flat steel plate rather than forged from bar or billet. They are widely used in waterworks, irrigation, selected industrial systems, utility connections, and other applications where ring-type slip-on and blind flange styles are appropriate. In simple terms, plate flanges are often chosen because they provide a reliable way […]
Different Types of Plate Flanges in Piping Systems
Plate flanges are one of the most widely used connection components in piping systems, especially in waterworks, industrial processing, and utility applications. They are fabricated by cutting profiles from flat carbon or stainless steel ASTM specified plate. Subsequently, they are machined to precise specifications, including bolt hole patterns and center bores. While forged flanges are […]
Domestic (AIS) Flanges: U.S. Compliance Requirements by State
If you work on water or wastewater projects, you’ve likely encountered AIS (American Iron and Steel) and BABA (Build America, Buy America). They are closely related but don’t operate the same way in practice. AIS established the baseline by requiring that iron and steel products used in State Revolving Funds (SRF)-funded projects—like pipes, fittings, valves, and flanges—be […]
DIN Flange Dimensions and Specifications
The Deutsches Institut für Normung (DIN) is a leading standards organization that aligns with European and international frameworks to ensure industrial safety and quality. DIN establishes essential requirements for metric piping, specifically regarding flange materials, pressure ratings, and temperature tolerances. While “DIN flange” remains the standard shorthand in international industrial projects, dimensional requirements are now […]