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NOS Assistant
Northern Oilfield Services
API 6A Flange Reference Tool
Flange Size (Nominal)
Pressure Rating
Select a flange size and pressure rating to view ring, bolt, and pump PSI specs.
NOS Cheat Sheet V1.0 · API 6A / ISO 10423 · NOS supplies ring gaskets & stud bolts · 701-941-0423
