CATEGORY
Standards & Testing
Technical guides, selection criteria, and field notes under Standards & Testing.
3 articles
September 5, 20268 min read
What separates 304, 316 and duplex stainless steel in valves? Chloride resistance, PREN values, temperature effects, food, chemical and seawater duties and the cost difference explained.
stainless steel valveAISI 316AISI 304duplex stainless
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July 21, 20268 min read
Why a PN16 flange and a Class 150 flange do not bolt together: bolt circle and hole count differences, RF and FF facings, gasket standards and ASME PCC-1 tightening sequence, with numbers.
flange standardsEN 1092-1ASME B16.5gasket selection
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June 26, 20265 min read
What ANSI/FCI 70-2 Class I-VI and EN 12266 leakage rates mean: how to read seat leakage classes, how to compare test conditions and which class each application needs.
seat leakage classANSI FCI 70-2EN 12266valve testing
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