{"id":1304,"date":"2025-10-15T11:53:44","date_gmt":"2025-10-15T11:53:44","guid":{"rendered":"https:\/\/stvvalve.com\/?p=1304"},"modified":"2025-10-15T11:53:44","modified_gmt":"2025-10-15T11:53:44","slug":"api-600-vs-api-602-key-differences-and-when-to-use-each-valve-standard","status":"publish","type":"post","link":"https:\/\/stvvalve.com\/es\/api-600-vs-api-602-key-differences-and-when-to-use-each-valve-standard\/","title":{"rendered":"API 600 vs. API 602: Key Differences and When to Use Each Valve Standard"},"content":{"rendered":"
In industrial valve selection\u2014especially for oil, gas, and chemical applications\u2014the American Petroleum Institute (API) standards API 600 and API 602 are non-negotiable benchmarks for safety, performance, and reliability. Both govern gate valves (a staple for on\/off flow control), but they target distinct use cases: API 600 focuses on large, high-pressure gate valves for heavy-duty systems, while API 602 is tailored to small-bore, compact gate valves for instrumentation and low-flow applications. Below\u2019s a detailed breakdown of their differences, requirements, and ideal applications to help you choose the right standard for your needs.<\/span>\u200b<\/span><\/span><\/div>\n
First: Core Scope of Each Standard<\/span><\/span>\u200b<\/span><\/div>\n
Before diving into details, it\u2019s critical to understand the <\/span><\/span>primary focus<\/span><\/span> of API 600 and API 602\u2014this defines their entire purpose:<\/span><\/span>\u200b<\/span><\/div>\n
API 600: Gate Valves for Petroleum and Natural Gas Industries (Large, High-Pressure)<\/span><\/span>\u200b<\/span><\/div>\n
API 600 is titled <\/span><\/span>\u201cSteel Gate Valves, Flanged and Butt-Welding Ends, Bolted Bonnet, for Petroleum and Natural Gas Industries\u201d<\/span><\/span>. Its core scope is <\/span><\/span>large-bore, high-pressure gate valves<\/span><\/span> designed for harsh industrial environments (e.g., refineries, pipeline transmission, wellheads) where reliability and pressure resistance are critical.<\/span><\/span>\u200b<\/span><\/div>\n
API 602: Compact Gate Valves (1\u00bd Inch and Smaller)<\/span><\/span>\u200b<\/span><\/div>\n
API 602 is titled <\/span><\/span>\u201cCompact Steel Gate Valves, Flanged, Threaded, Welded and Clamped Ends, for Petroleum and Natural Gas Industries\u201d<\/span><\/span>. It focuses exclusively on <\/span><\/span>small-bore gate valves (size \u22641\u00bd inches)<\/span><\/span> for low-flow, high-pressure applications (e.g., instrumentation lines, hydraulic systems, subsea manifolds) where space is limited.<\/span><\/span>\u200b<\/span><\/div>\n
Key Difference 1: Size and Pressure\/Temperature Ratings<\/span><\/span>\u200b<\/span><\/div>\n
The most obvious distinction between API 600 and API 602 is their size range and pressure\/temperature capabilities\u2014directly tied to their intended use cases:<\/span><\/span>\u200b<\/span><\/div>\n
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API 600<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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API 602<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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Size Range<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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2 inches to 48 inches (large-bore)<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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\u00bd inch to 1\u00bd inches (small-bore, compact)<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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Pressure Rating<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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ANSI Class 150 to 2500 (\u2248285 psi to 4,200 psi)<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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ANSI Class 150 to 2500 (same pressure range, but optimized for small sizes)<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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Temperature Range<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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-29\u00b0C (-20\u00b0F) to 649\u00b0C (1,200\u00b0F) (carbon steel); -196\u00b0C (-320\u00b0F) to 427\u00b0C (800\u00b0F) (stainless steel)<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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-29\u00b0C (-20\u00b0F) to 316\u00b0C (600\u00b0F) (carbon steel); -196\u00b0C (-320\u00b0F) to 427\u00b0C (800\u00b0F) (stainless steel)<\/span>\u200b<\/span><\/div>\n<\/div>\n<\/div>\n
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\"API600

API600 GATE VALVE<\/p><\/div>\n<\/div>\n

Why This Matters:<\/span><\/span>\u200b<\/span><\/div>\n
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