Not every weld neck flange looks identical. The tapered hub and butt-weld end are constant, but the face type, hub length, and bore can all change to fit a specific joint or industry requirement. This guide covers the main types
The NSF-372 standard confirms one primary requirement: that a product qualifies as lead-free under federal law. Determining compliance requires more than checking whether a listed alloy contains lead. In this article, we cover what the NSF-372 standard measures, how the
A weld neck flange provides a strong, reliable piping connection, but only when designed to the correct material specification and dimensional standard. Choosing the wrong grade or class means the flange will either fail in service or fail to bolt
NSF/ANSI/CAN 60 and 61 were developed to create consistent standards for the materials, chemicals, and components used in drinking water systems. The history of NSF-60 and 61 reflects decades of work by regulators, standards organizations, utilities, and public health experts.
A weld neck flange starts as a solid steel billet and ends as a precisely machined component with a tapered hub and beveled weld end. The manufacturing process of weld neck flanges includes heating, forging, and machining steps. Those steps
The new product line adds NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 certified stainless steel flanges to API International’s waterworks offering TUALATIN, Oregon, September 1st, 2026 – API International, a manufacturer and engineered solutions provider of standard and custom flanges, fittings and
If a flange is installed in a North American drinking water system, the spec sheet is almost certain to reference NSF®/ANSI/CAN 61 before any other standard. NSF/ANSI/CAN 61 determines whether a flange, gasket, or coating is permitted to contact potable
NSF-61 and NSF/ANSI/CAN 372 are two consistently paired standards which are often called “NSF-61/372” and treated as one certification. strict limits on lead content leaching in drinking water systems. This standard has its own legal basis and its own testing
Warehouse Expansion Supports Data Centers, Exhaust, Waterworks, and HVAC Markets FOR IMMEDIATE RELEASE GREENFIELD, Ind., August 17th, 2026 — API International has completed a major expansion of its Greenfield, Indiana, warehouse, increasing its Midwest warehouse capacity by 75% while positioning
A weld neck flange features a tapered hub that is butt-welded directly to a pipe, creating a continuous, full-penetration joint. This design makes it the industry standard for high-pressure, high-temperature, cyclic, and heavy-use applications across process plants, power facilities, and
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