How NSF Certification Is Earned
September 24, 2026
An NSF certification mark can look like just another stamp on a spec sheet, but in reality, a rigorous, multi-step
Our blog is designed to help you make confident and informed decisions when selecting flanges for your project. Our Team of engineers and subject matter experts specialize in AWWA, ANSI/ASME, DIN, and more. We work extensively in custom machined parts and projects that demand top grade parts. Whether you work in waterworks, industrial processing, energy, or manufacturing, our articles provide practical guidance written by real subject matter experts backed by API International.
An NSF certification mark can look like just another stamp on a spec sheet, but in reality, a rigorous, multi-step
Not every weld neck flange looks identical. The tapered hub and butt-weld end are constant, but the face type, hub
The NSF-372 standard confirms one primary requirement: that a product qualifies as lead-free under federal law. Determining compliance requires more
A weld neck flange provides a strong, reliable piping connection, but only when designed to the correct material specification and
NSF/ANSI/CAN 60 and 61 were developed to create consistent standards for the materials, chemicals, and components used in drinking water
A weld neck flange starts as a solid steel billet and ends as a precisely machined component with a tapered
If a flange is installed in a North American drinking water system, the spec sheet is almost certain to reference
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
