{"id":2357,"date":"2025-11-03T17:03:48","date_gmt":"2025-11-03T09:03:48","guid":{"rendered":"https:\/\/sunhyings.com\/?p=2357"},"modified":"2026-03-13T10:03:58","modified_gmt":"2026-03-13T02:03:58","slug":"asme-b16-5-mean-for-pipe-flanges-and-flange-fittings","status":"publish","type":"post","link":"https:\/\/sunhyings.com\/pt\/blog\/asme-b16-5-mean-for-pipe-flanges-and-flange-fittings\/","title":{"rendered":"O que significa ASME B16.5 para flanges de tubula\u00e7\u00e3o e conex\u00f5es flangeadas?"},"content":{"rendered":"\n
\"ASME<\/figure>\n\n\n\n

ASME B16.5\u00a0is the primary dimensional and rating standard for common pipe flanges and flanged fittings in many U.S.-influenced projects. If you have ever seen drawings labeled \u201cANSI flanges,\u201d this is usually the family they mean. In engineering terms, B16.5 exists so that bolting patterns, facing details, and pressure-temperature ratings stay interchangeable across manufacturers within the standard\u2019s scope.<\/p>\n\n\n\n

It is used heavily in oil and gas, chemical processing, power generation, water treatment, and general industrial utility piping. What matters in practice is that B16.5 gives you a controlled \u201cinterface\u201d (NPS, class, face type, drilling, tolerances, and marking rules) so you can avoid field rework caused by bolt-hole mismatch, wrong gasket seating width, or incompatible facing selections.<\/p>\n\n\n\n

Benefit<\/th>Description<\/th><\/tr>
Pressure\u2013Temperature Ratings<\/td>Defines Class ratings (150\u20132500) and the allowable pressure at temperature by material group; class is a designation, not a direct PSI value.<\/td><\/tr>
Ease of Installation<\/td>Standardized bolt circle diameter (BCD), hole count, and facing geometry reduce alignment issues and shorten fit-up time.<\/td><\/tr>
Traceability & Interchangeability<\/td>Requires permanent marking (size, class, material, manufacturer\/heat ID) to support QA\/QC, MTR review, and maintenance traceability.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Field note (common misunderstanding):<\/strong> A \u201cClass 150\u201d flange is not \u201c150 psi.\u201d The safe working pressure depends on temperature and the selected material group in the rating tables. If you spec solely from ambient numbers and ignore temperature derating, you can end up with a joint that passes hydro at ambient but seeps under hot service.<\/p>\n\n\n\n

Sunhy\u2019s stainless steel flange<\/a> products are manufactured to the relevant ASME requirements (dimensions, drilling, facing, and marking) so you can maintain compatibility during procurement and replacement work.<\/p>\n\n\n\n

ASME B16.5 Scope & Limitations<\/h2>\n\n\n\n
\n