API 600 vs API 602 vs API 603: The Complete Guide to Gate Valve Standards for Industrial Procurement
When sourcing industrial gate valves, three API standards define the global benchmark: API 600, API 602, and API 603. Each serves a distinct purpose — from large-bore high-pressure refinery pipelines to compact small-bore instrument lines and corrosion-resistant stainless steel applications. This guide breaks down the scope, design requirements, and key differences of all three standards, with a practical comparison table and actionable procurement guidance to help engineers and buyers select the right valve for every service condition.


