{"id":2687,"date":"2025-11-06T16:59:30","date_gmt":"2025-11-06T08:59:30","guid":{"rendered":"https:\/\/sunhyings.com\/?p=2687"},"modified":"2026-03-16T15:24:43","modified_gmt":"2026-03-16T07:24:43","slug":"ansi-flanges-dimensions-and-selection-guide","status":"publish","type":"post","link":"https:\/\/sunhyings.com\/ar\/blog\/ansi-flanges-dimensions-and-selection-guide\/","title":{"rendered":"\u062f\u0644\u064a\u0644 \u0623\u0628\u0639\u0627\u062f \u0648\u0627\u062e\u062a\u064a\u0627\u0631 \u0641\u0644\u0646\u062c\u0627\u062a ANSI \u0644\u0639\u0627\u0645 2026"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flanges-Dimensions-and-Selection-Guide-for-2025.webp\" alt=\"ANSI Flanges: Dimensions and Selection Guide (ASME B16.5 \/ B16.47)\" class=\"wp-image-2693\" title=\"ANSI Flanges Dimensions and Selection Guide (ASME B16.5 \/ B16.47)\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flanges-Dimensions-and-Selection-Guide-for-2025.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flanges-Dimensions-and-Selection-Guide-for-2025-300x300.webp 300w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flanges-Dimensions-and-Selection-Guide-for-2025-150x150.webp 150w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flanges-Dimensions-and-Selection-Guide-for-2025-768x768.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flanges-Dimensions-and-Selection-Guide-for-2025-12x12.webp 12w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>You need accurate ANSI flange dimensions to ensure safe and efficient piping systems.<\/strong><br>In most industries, \u201cANSI flanges\u201d commonly refers to flanges made to <strong>ASME B16.5<\/strong> (NPS 1\/2\u2033\u201324\u2033) and <strong>ASME B16.47<\/strong> (NPS 26\u2033\u201360\u2033). Always select flanges using the latest standard tables, because <strong>pressure-temperature ratings depend on material group and temperature<\/strong>\u2014not just the class number.<\/p>\n\n\n\n<p>If you need a fast starting point, use these internal references before you open the standard books:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/sunhyings.com\/stainless-steel-flange\/standards\/asme-b16-5\/\">ASME B16.5 flange standard<\/a> (sizes, classes, key terms)<\/li>\n\n\n\n<li><a href=\"https:\/\/sunhyings.com\/blog\/class-150-vs-class-300-flange-pressure-ratings-comparison\/\">Class 150 vs Class 300 flange pressure ratings<\/a> (how class impacts selection)<\/li>\n\n\n\n<li><a href=\"https:\/\/sunhyings.com\/blog\/stainless-steel-flange-types-main-uses-and-selection-guide\/\">stainless steel flange types and selection guide<\/a> (type-by-type use cases)<\/li>\n\n\n\n<li><a href=\"https:\/\/sunhyings.com\/resources\/flange-dimensions\/\">ASME flange dimensions chart<\/a> (quick OD \/ BCD \/ bolt-hole reference)<\/li>\n\n\n\n<li>Key benefits of knowing ANSI flange dimensions:\n<ul class=\"wp-block-list\">\n<li>Prevents bolt-hole mismatch and assembly rework<\/li>\n\n\n\n<li>Improves gasket sealing reliability and joint life<\/li>\n\n\n\n<li>Reduces downtime from leaks caused by wrong class, wrong face, or wrong bolting<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Benefit<\/th><th>Description<\/th><\/tr><tr><td>Corrosion resistance (stainless)<\/td><td>Stainless steels form a passive oxide film that helps resist rust in many industrial environments.<\/td><\/tr><tr><td>Strength at elevated temperature<\/td><td>Material choice + correct class selection supports hot service such as steam, hot oil, and process gas.<\/td><\/tr><tr><td>Hygienic and cleanable<\/td><td>Commonly used in pharma\/food systems when surface finish and cleanability matter.<\/td><\/tr><tr><td>Manufacturing flexibility<\/td><td>CNC machining and controlled tolerances help keep bolt circle and faces consistent for assembly.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Tip: Treat dimension tables as must-follow design inputs. A flange that is \u201calmost the same\u201d can still fail during bolt-up.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"What Are ANSI Flanges?\">What Are ANSI Flanges?<\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-embed-handler wp-block-embed-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Flange Types Explained  ASME ANSI B16 5\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/cYSNJTDrgx8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">ANSI Flanges Definition<\/h3>\n\n\n\n<p><strong>ANSI flanges are standardized pipe flanges and flanged fittings designed for reliable connections in piping systems.<\/strong> You use these components to join pipes, valves, pumps, and equipment, creating a bolted gasketed joint intended to be leak-tight under the designed pressure and temperature conditions.<\/p>\n\n\n\n<p>The standardization history behind today\u2019s flange system goes back to the early ASME B16 committee work in the 1920s, and modern projects now typically reference ASME B16.5 and ASME B16.47 rather than relying on the older \u201cANSI flange\u201d wording.<\/p>\n\n\n\n<p><strong>Engineering note:<\/strong> Do not assume ASME B16.5 flanges are interchangeable with waterworks flange standards such as AWWA. Always verify bolt circle, bolt-hole count, and face details before mating different standards.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Note: \u201cANSI flange\u201d is a search term; the governing dimensional standards in modern projects are typically ASME B16.5 and ASME B16.47.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Industry Applications<\/h3>\n\n\n\n<p><strong>You will find ANSI flanges in a wide range of industries due to their versatility and reliability.<\/strong> Typical sectors include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Oil and gas (upstream, midstream, downstream)<\/li>\n\n\n\n<li>Chemical processing and petrochemicals<\/li>\n\n\n\n<li>Power generation (steam, condensate, auxiliary systems)<\/li>\n\n\n\n<li>Water and wastewater facilities (verify standard compatibility before mating)<\/li>\n\n\n\n<li>Shipbuilding, offshore platforms, and marine systems<\/li>\n<\/ul>\n\n\n\n<p>For practical selection help, you can cross-check flange type and typical use cases here: <a href=\"https:\/\/sunhyings.com\/blog\/stainless-steel-flange-types-main-uses-and-selection-guide\/\">stainless steel flange types and selection guide<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Flange Types and Pressure Classes\">Flange Types and Pressure Classes<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Main Flange Types<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Face-Types.webp\" alt=\"Flange Face Types\" class=\"wp-image-8845\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Face-Types.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Face-Types-800x447.webp 800w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Face-Types-768x429.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Face-Types-18x10.webp 18w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>You will encounter several main types of ANSI flanges, each designed for specific applications and installation methods.<\/strong><br>Use this table as a field guide, then confirm final dimensions in the standard tables.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Flange Type<\/th><th>Description<\/th><th>Applications<\/th><\/tr><tr><td>Threaded Flanges<\/td><td>Threads allow installation without welding.<\/td><td>Low-pressure, maintenance-heavy service. Avoid for severe vibration and high temperature.<\/td><\/tr><tr><td>Weld-Neck Flanges<\/td><td>Long-tapered hub welded to pipe for stress distribution.<\/td><td>High-pressure \/ high-temperature \/ cyclic service where fatigue resistance matters.<\/td><\/tr><tr><td>Slip-On Flanges<\/td><td>Slides over pipe, then welded in place.<\/td><td>General service where cost and installation speed matter.<\/td><\/tr><tr><td>Socket-Weld Flanges<\/td><td>Pipe inserts into socket before welding.<\/td><td>Small-bore high-pressure service where alignment control is needed.<\/td><\/tr><tr><td>Blind Flanges<\/td><td>Solid plate to close off piping.<\/td><td>Isolation points, pressure testing, future expansion tie-ins.<\/td><\/tr><tr><td>Lap-Joint Flanges<\/td><td>Used with a stub end; allows easy alignment.<\/td><td>Frequent disassembly or expensive alloy piping where material-cost optimization matters.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Internal dimension references for quick checks: <a href=\"https:\/\/sunhyings.com\/stainless-steel-flange\/weld-neck-flanges\/\">weld neck flange dimensions<\/a>, <a href=\"https:\/\/sunhyings.com\/stainless-steel-flange\/blind-flanges\/\">blind flange dimensions<\/a>, and <a href=\"https:\/\/sunhyings.com\/blog\/raised-face-vs-flat-face-flange-differences-comparison\/\">raised face vs flat face flanges<\/a>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Tip: For vibration or thermal cycling, prioritize weld neck flanges + correct gasket + controlled bolt-up procedure.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Pressure Class Overview<\/h3>\n\n\n\n<p><strong>The class of a flange defines an allowable pressure-temperature envelope, not a single fixed \u201cpsi value\u201d.<\/strong><br>Always use the standard pressure-temperature tables for your <em>exact<\/em> material group and service temperature. As temperature rises, allowable pressure typically decreases.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Class<\/th><th>Where it\u2019s commonly used<\/th><th>What to verify<\/th><\/tr><tr><td>150<\/td><td>General service utilities, low-to-moderate pressure<\/td><td>Gasket type, bolt grade, face (RF\/FF)<\/td><\/tr><tr><td>300<\/td><td>Process lines with higher pressure or higher temperature<\/td><td>Material group + temperature derating<\/td><\/tr><tr><td>600<\/td><td>High-pressure process and energy systems<\/td><td>Bolting control, face finish, joint assembly procedure<\/td><\/tr><tr><td>900 \/ 1500 \/ 2500<\/td><td>Critical high-pressure service<\/td><td>Engineering review, stress, assembly plan, inspection<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419166424797662.webp\" alt=\"Illustration: ANSI\/ASME flange pressure class comparison (conceptual)\" class=\"wp-image-2689\" title=\"ANSI\/ASME flange class comparison (conceptual)\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419166424797662.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419166424797662-300x225.webp 300w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419166424797662-768x576.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419166424797662-16x12.webp 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>Important:<\/strong> Charts like the above should be treated as a visual aid only. Final design must use the pressure-temperature ratings in ASME B16.5 \/ B16.47 for your exact material and temperature.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pressure classes such as 150, 300, and 600 define operating limits based on material and design.<\/li>\n\n\n\n<li>The pressure rating of the flange changes with fluid temperature\u2014always check the official pressure-temperature tables.<\/li>\n\n\n\n<li>Use <a href=\"https:\/\/sunhyings.com\/blog\/class-150-vs-class-300-flange-pressure-ratings-comparison\/\">Class 150 vs Class 300 flange pressure ratings<\/a> as a practical primer for selection logic.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Note: Many real-world leaks are assembly-related (surface, gasket, bolt load control) even when the flange class is correct.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"ANSI Flanges Dimensions\">ANSI Flanges Dimensions<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Key Dimensions Explained<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"765\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flange-Key-Dimensions.webp\" alt=\"ANSI Flange Key Dimensions\" class=\"wp-image-8843\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flange-Key-Dimensions.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flange-Key-Dimensions-800x598.webp 800w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flange-Key-Dimensions-768x574.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ANSI-Flange-Key-Dimensions-16x12.webp 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>You must understand the key dimensions of ansi flanges to ensure proper fit and safe operation.<\/strong><br>These parameters control interchangeability, sealing, and bolt-up success:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nominal Pipe Size (NPS):<\/strong> The pipe size the flange matches.<\/li>\n\n\n\n<li><strong>Outer Diameter (O.D.):<\/strong> Total flange diameter.<\/li>\n\n\n\n<li><strong>Inner Diameter (I.D.):<\/strong> Bore diameter (flow opening).<\/li>\n\n\n\n<li><strong>Flange Thickness:<\/strong> Influences stiffness and pressure capability.<\/li>\n\n\n\n<li><strong>Bolt Circle Diameter (BCD):<\/strong> Bolt pattern circle; must match mating flange.<\/li>\n\n\n\n<li><strong>Number and Size of Bolt Holes:<\/strong> Affects bolt selection and joint load distribution.<\/li>\n\n\n\n<li><strong>Face Type:<\/strong> RF \/ FF \/ RTJ impacts gasket choice and sealing method.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Tip:<\/strong> Bolt circle mismatch is one of the fastest ways to waste field time. Verify BCD + bolt-hole count before purchasing.<\/p>\n<\/blockquote>\n\n\n\n<p>For a quick lookup before procurement or fabrication, use this internal <a href=\"https:\/\/sunhyings.com\/resources\/flange-dimensions\/\">ASME flange dimensions chart<\/a>.<\/p>\n\n\n\n<p>You can see how these dimensions relate in the table below:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Dimension<\/th><th>Importance<\/th><\/tr><tr><td>Outer Diameter (O.D.)<\/td><td>Ensures compatibility with adjacent components.<\/td><\/tr><tr><td>Inner Diameter (I.D.)<\/td><td>Matches pipe size for efficient flow.<\/td><\/tr><tr><td>Flange Thickness<\/td><td>Affects stiffness and sealing stability under bolt load.<\/td><\/tr><tr><td>Bolt Circle Diameter<\/td><td>Aligns bolt holes for secure assembly.<\/td><\/tr><tr><td>Number and Size of Bolts<\/td><td>Distributes load and helps prevent leaks.<\/td><\/tr><tr><td>Face Type<\/td><td>Controls gasket style and sealing method.<\/td><\/tr><tr><td>Pressure Rating<\/td><td>Defines allowable pressure-temperature envelope for the material group.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Reading Dimension Tables<\/h3>\n\n\n\n<p><strong>You need to read ansi flange dimension tables accurately to guarantee safety and compatibility.<\/strong><br>Dimension tables typically include:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>NPS (Nominal Pipe Size)<\/li>\n\n\n\n<li>Flange O.D. (Outer Diameter)<\/li>\n\n\n\n<li>Flange Thickness<\/li>\n\n\n\n<li>Number of Bolts<\/li>\n\n\n\n<li>Bolt Hole Diameter<\/li>\n\n\n\n<li>Bolt Circle<\/li>\n<\/ol>\n\n\n\n<p>Here is a practical example excerpt for quick checks (always verify in the standard tables and match flange type + face):<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>NPS (inches)<\/th><th>Flange O.D. (inches)<\/th><th>Flange Thickness (inches)<\/th><th>No. of Bolts<\/th><th>Bolt Hole Diameter (inches)<\/th><th>Bolt Circle (inches)<\/th><\/tr><tr><td>1\/2<\/td><td>3.50<\/td><td>0.38<\/td><td>4<\/td><td>0.62<\/td><td>2-3\/8<\/td><\/tr><tr><td>1<\/td><td>4.25<\/td><td>0.50<\/td><td>4<\/td><td>0.62<\/td><td>3-1\/8<\/td><\/tr><tr><td>2<\/td><td>6.00<\/td><td>0.69<\/td><td>4<\/td><td>0.75<\/td><td>4-3\/4<\/td><\/tr><tr><td>4<\/td><td>9.00<\/td><td>0.88<\/td><td>8<\/td><td>0.75<\/td><td>7-1\/2<\/td><\/tr><tr><td>6<\/td><td>11.00<\/td><td>0.94<\/td><td>8<\/td><td>0.88<\/td><td>9-1\/2<\/td><\/tr><tr><td>8<\/td><td>13.50<\/td><td>1.06<\/td><td>8<\/td><td>0.88<\/td><td>11-3\/4<\/td><\/tr><tr><td>12<\/td><td>19.00<\/td><td>1.19<\/td><td>12<\/td><td>1.00<\/td><td>17.00<\/td><\/tr><tr><td>16<\/td><td>23.50<\/td><td>1.38<\/td><td>16<\/td><td>1.12<\/td><td>21-1\/4<\/td><\/tr><tr><td>24<\/td><td>32.00<\/td><td>1.81<\/td><td>20<\/td><td>1.38<\/td><td>29-1\/2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419170825076613.webp\" alt=\"Line chart: ANSI flange dimensions change by NPS size (illustration)\" class=\"wp-image-2691\" title=\"ANSI flange dimensions by NPS size (illustration)\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419170825076613.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419170825076613-300x225.webp 300w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419170825076613-768x576.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419170825076613-16x12.webp 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Note:<\/strong> Always verify each measurement against your flange type (WN \/ SO \/ BL), face (RF \/ FF \/ RTJ), and the governing standard tables before fabrication or ordering.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Example Dimension Table<\/h3>\n\n\n\n<p><strong>You should always check ANSI class ratings and pressure-temperature ratings when selecting flanges.<\/strong><br>Bolt-hole count and bolt-hole diameter change with pressure class and size. Use this as a simplified illustration, then confirm in the standard:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Pressure Class<\/th><th>Number of Bolt Holes<\/th><th>Diameter of Bolt Holes (mm)<\/th><\/tr><tr><td>Class 150<\/td><td>12<\/td><td>25.4<\/td><\/tr><tr><td>Class 300<\/td><td>16<\/td><td>32<\/td><\/tr><tr><td>Class 400<\/td><td>16<\/td><td>34.9<\/td><\/tr><tr><td>Class 600<\/td><td>20<\/td><td>34.9<\/td><\/tr><tr><td>Class 900<\/td><td>20<\/td><td>38.1<\/td><\/tr><tr><td>Class 1500<\/td><td>16<\/td><td>54<\/td><\/tr><tr><td>Class 2500<\/td><td>12<\/td><td>73<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419158310513979.webp\" alt=\"Illustration: bolt-hole number and diameter trend by pressure class\" class=\"wp-image-2690\" title=\"Bolt-hole trend by flange class (illustration)\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419158310513979.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419158310513979-300x225.webp 300w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419158310513979-768x576.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/chart_1762419158310513979-16x12.webp 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>You must reference the correct standard for your application.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b16-5-pipe-flanges-flanged-fittings-nps-1-2-nps-24-metric-inch-standard\" target=\"_blank\" rel=\"noreferrer noopener\">ASME B16.5 official standard page<\/a> applies to NPS 1\/2\u2033 to 24\u2033.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b16-47-large-diameter-steel-flanges-nps-26-nps-60-metric-inch-standard\" target=\"_blank\" rel=\"noreferrer noopener\">ASME B16.47 official standard page<\/a> applies to larger sizes (NPS 26\u2033 to 60\u2033) and includes Series A and Series B designs.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ASME-B16.5-vs-B16.47.webp\" alt=\"ASME B16.5 vs B16.47\" class=\"wp-image-8844\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ASME-B16.5-vs-B16.47.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ASME-B16.5-vs-B16.47-800x447.webp 800w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ASME-B16.5-vs-B16.47-768x429.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/ASME-B16.5-vs-B16.47-18x10.webp 18w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Standard<\/th><th>Size Range (NPS)<\/th><th>Notes<\/th><\/tr><tr><td>ASME B16.5<\/td><td>1\/2\u2033 to 24\u2033<\/td><td>Most common ANSI flange dimensional reference in process industries.<\/td><\/tr><tr><td>ASME B16.47<\/td><td>26\u2033 to 60\u2033<\/td><td>Large diameter steel flanges; verify Series A vs Series B before ordering.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Series<\/th><th>Description<\/th><\/tr><tr><td>Series A<\/td><td>Typically heavier duty; common in process piping.<\/td><\/tr><tr><td>Series B<\/td><td>Typically lighter and more compact; confirm bolt pattern compatibility before mating.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Alert:<\/strong> Always select flanges that comply with the governing standard and project specification. Close enough dimensions can create leaks, bolt binding, or gasket blowout.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Engineering example:<\/strong> A common site issue is mating a flange from a different standard or wrong series that looks right but has a different bolt circle. The result is rework, damaged studs, and delayed commissioning.<\/p>\n\n\n\n<p><strong>Accurate dimensions protect your piping system from leaks, failures, and costly downtime.<\/strong><br>Consult standard tables before ordering, and keep records for traceability and QA.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Selecting ANSI Flanges\">Selecting ANSI Flanges<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Selection Steps<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Bolt-Tightening-Sequence.webp\" alt=\"Bolt Tightening Sequence\" class=\"wp-image-8846\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Bolt-Tightening-Sequence.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Bolt-Tightening-Sequence-800x800.webp 800w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Bolt-Tightening-Sequence-300x300.webp 300w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Bolt-Tightening-Sequence-768x768.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Bolt-Tightening-Sequence-12x12.webp 12w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>You must follow a systematic approach to select the correct ANSI flange for your piping application.<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Gather project data.<\/strong><br>Design pressure, design temperature, NPS, flange type, face type, and corrosion allowance.<\/li>\n\n\n\n<li><strong>Confirm the governing standard.<\/strong><br>Use ASME B16.5 for common sizes; use ASME B16.47 for large diameter steel flanges.<\/li>\n\n\n\n<li><strong>Select flange material.<\/strong><br>Match fluid chemistry, temperature, and required mechanical properties (example: 304 \/ 316 stainless for corrosion resistance; verify chloride risk).<\/li>\n\n\n\n<li><strong>Select pressure class.<\/strong><br>Use pressure-temperature ratings for your material group and service temperature.<\/li>\n\n\n\n<li><strong>Confirm dimensions.<\/strong><br>Verify bolt circle, bolt-hole count, flange thickness, and face details.<\/li>\n\n\n\n<li><strong>Select gasket + bolting.<\/strong><br>Choose gasket style and bolt grade compatible with face type and temperature.<\/li>\n\n\n\n<li><strong>Define assembly method.<\/strong><br>For critical service, follow a controlled bolt-up process such as ASME PCC-1 guidance.<\/li>\n\n\n\n<li><strong>Document and inspect.<\/strong><br>Record heat numbers, lot numbers, and inspection results.<\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Tip: For critical joints, reference controlled flange joint assembly practices such as <a href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/pressure-boundary-bolted-flange-joint-assembly\" target=\"_blank\" rel=\"noreferrer noopener\">ASME PCC-1<\/a>.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Selection example (field-ready):<\/strong><br>If you have a hot process line with vibration, a typical robust choice is <strong>weld neck + raised face + appropriate spiral wound gasket + controlled bolt-up<\/strong>, then confirm final details in the governing standard tables and project specs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Common Mistakes<\/h3>\n\n\n\n<p><strong>You can avoid costly errors by understanding the most frequent mistakes in ANSI flange selection.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Mistake<\/th><th>Consequence<\/th><\/tr><tr><td>Ignoring pressure-temperature ratings<\/td><td>Leaks, gasket failure, flange damage, downtime.<\/td><\/tr><tr><td>Using the wrong face type<\/td><td>Poor gasket seating, leakage, uneven compression.<\/td><\/tr><tr><td>Mating different standards or series without verification<\/td><td>Bolt-hole mismatch, forced assembly, damaged studs.<\/td><\/tr><tr><td>Reusing old gaskets<\/td><td>Loss of resilience, leaks after thermal cycles.<\/td><\/tr><tr><td>Uneven bolt load \/ poor tightening method<\/td><td>Gasket blowout risk, repeat leaks, joint relaxation.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Never treat class as a single psi value. Use pressure-temperature tables.<\/li>\n\n\n\n<li>Replace gaskets during reassembly unless your project procedure explicitly permits reuse.<\/li>\n\n\n\n<li>Confirm face type (RF \/ FF \/ RTJ) and gasket compatibility.<\/li>\n\n\n\n<li>Use controlled tightening steps to reduce uneven gasket compression.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Note: Many repeat leaks come from bolt-load inconsistency rather than the flange itself. A controlled bolt-up process can dramatically reduce rework.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">2026 Standards Tips<\/h3>\n\n\n\n<p><strong>You must stay updated with best practices and project requirements for ANSI flange selection in 2026.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Confirm which standard edition your project requires (B16.5 vs B16.47; Series A vs Series B).<\/li>\n\n\n\n<li>Verify flange face type and gasket style early (RF \/ FF \/ RTJ).<\/li>\n\n\n\n<li>Follow proper torque and tightening sequence to reduce uneven gasket compression.<\/li>\n\n\n\n<li>Inspect and maintain flanged joints; record leakage history and corrective actions.<\/li>\n\n\n\n<li>Keep traceability documentation (heat number, lot number) for QA audits and maintenance planning.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Alert: Following the governing standard and a controlled assembly method supports safety, reliability, and long joint life.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>You can optimize your piping system by selecting the right ANSI flanges, verifying accurate dimensions, and applying disciplined joint assembly practices.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Flange Markings and Compliance\">Flange Markings and Compliance<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Verifying Markings<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"765\" src=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Marking-Checklist.webp\" alt=\"Flange Marking Checklist\" class=\"wp-image-8847\" srcset=\"https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Marking-Checklist.webp 1024w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Marking-Checklist-800x598.webp 800w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Marking-Checklist-768x574.webp 768w, https:\/\/sunhyings.com\/wp-content\/uploads\/2025\/11\/Flange-Marking-Checklist-16x12.webp 16w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><strong>You must check flange markings to confirm authenticity and compliance with industry standards.<\/strong> Markings support traceability and help prevent incorrect installation. In many projects, flange marking practices reference industry marking standards such as MSS SP-25.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Marking Type<\/th><th>Description<\/th><\/tr><tr><td>Flange Type Identification<\/td><td>Shows type such as WN \/ SO \/ BL for correct application.<\/td><\/tr><tr><td>Dimensional Identification<\/td><td>Lists size and class for correct fit and rating selection.<\/td><\/tr><tr><td>Material Identification<\/td><td>States material grade for corrosion and temperature compatibility.<\/td><\/tr><tr><td>Pressure Rating Identification<\/td><td>Indicates class (e.g., 150 \/ 300 \/ 600).<\/td><\/tr><tr><td>Manufacturer Identification<\/td><td>Displays manufacturer logo \/ code for traceability.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>You should also check for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Heat number (links to raw material batch)<\/li>\n\n\n\n<li>Lot number (tracks production batch)<\/li>\n\n\n\n<li>Clear, permanent marking location and legibility<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Tip:<\/strong> Verify markings before installation. A wrong material grade can pass visual inspection but fail in corrosion or high-temperature service.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">2026 Compliance<\/h3>\n\n\n\n<p><strong>You need to ensure that flanges meet updated project requirements and global standards for 2026.<\/strong> The latest requirements often emphasize dimensional accuracy, material quality, and traceability.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Standard<\/th><th>Description<\/th><\/tr><tr><td><a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b16-5-pipe-flanges-flanged-fittings-nps-1-2-nps-24-metric-inch-standard\">ASME B16.5 official page<\/a><\/td><td>Common dimensional reference for many ANSI flanges used in process industries.<\/td><\/tr><tr><td><a target=\"_blank\" rel=\"noreferrer noopener\" href=\"https:\/\/www.asme.org\/codes-standards\/find-codes-standards\/b16-47-large-diameter-steel-flanges-nps-26-nps-60-metric-inch-standard\">ASME B16.47 official page<\/a><\/td><td>Design requirements for large diameter steel flanges; verify Series A\/B.<\/td><\/tr><tr><td><a target=\"_blank\" rel=\"noreferrer noopener nofollow\" href=\"https:\/\/msshq.org\/page\/SP25\">MSS SP-25 official page<\/a><\/td><td>Industry marking system reference supporting traceability.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Sunhy supports compliance through controlled machining, inspection, and traceability documentation. You can also reference Sunhy\u2019s standards overview here: <a href=\"https:\/\/sunhyings.com\/stainless-steel-flange\/standards\/asme-b16-5\/\">ASME B16.5 flange standard<\/a>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>Alert:<\/strong> Only select flanges with complete and legible markings, verified material documentation, and dimensions matching the governing standard tables.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>You can select the right ANSI flanges for your project by following a clear process.<\/strong><br>Here are the essential steps:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Prepare tools and materials (gaskets, studs, lubricants if permitted).<\/li>\n\n\n\n<li>Check standard compliance, markings, and flange face condition.<\/li>\n\n\n\n<li>Align, install bolts, and tighten using a controlled sequence.<\/li>\n\n\n\n<li>Pressure test or leak test per project procedure and record results.<\/li>\n<\/ol>\n\n\n\n<p><strong>Use this quick reference checklist for ANSI flange selection:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Criteria<\/th><th>Description<\/th><\/tr><tr><td>Compliance with standards<\/td><td>Confirm ASME B16.5 \/ B16.47 and project spec.<\/td><\/tr><tr><td>Pressure-temperature rating<\/td><td>Use official rating tables for the exact material and temperature.<\/td><\/tr><tr><td>Connection dimensions<\/td><td>Verify BCD, bolt holes, thickness, and face type.<\/td><\/tr><tr><td>Material selection<\/td><td>Match corrosion, temperature, and mechanical requirements.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Always consult updated standards and verify markings. Correct interpretation prevents mismatch, supports traceability, and improves joint reliability.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"FAQ\">FAQ<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">What is the significance of the Outside Diameter (O.D.) in ANSI flanges?<\/h3>\n\n\n\n<p><strong>You must match the O.D. to your pipe or equipment for proper fit.<\/strong> O.D. helps ensure the flange clears adjacent components and seats correctly with the mating flange.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ensures compatibility<\/li>\n\n\n\n<li>Prevents assembly interference<\/li>\n\n\n\n<li>Supports secure connections<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Which key dimensions should you consider when selecting ANSI flanges?<\/h3>\n\n\n\n<p><strong>You should focus on these critical dimensions:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Dimension<\/th><th>Purpose<\/th><\/tr><tr><td>NPS<\/td><td>Pipe size<\/td><\/tr><tr><td>O.D.<\/td><td>Flange fit<\/td><\/tr><tr><td>I.D.<\/td><td>Flow capacity<\/td><\/tr><tr><td>Bolt Circle<\/td><td>Bolt alignment<\/td><\/tr><tr><td>Thickness<\/td><td>Stiffness and sealing stability<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">How does the number of bolt holes affect flange performance?<\/h3>\n\n\n\n<p><strong>You need the correct number of bolt holes for even load distribution.<\/strong> Correct bolt pattern helps apply uniform gasket compression and reduces leak risk.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduces leakage risk<\/li>\n\n\n\n<li>Maintains joint stability<\/li>\n\n\n\n<li>Supports system safety<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">How do you choose the right pressure rating for ANSI flanges?<\/h3>\n\n\n\n<p><strong>You must select a pressure rating that matches your system\u2019s requirements.<\/strong> Use pressure-temperature tables for the exact material group and service temperature, then confirm the correct flange dimensions and face type.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check design pressure and temperature<\/li>\n\n\n\n<li>Confirm governing standard (B16.5 vs B16.47)<\/li>\n\n\n\n<li>Confirm material compatibility and gasket \/ bolting plan<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Are ASME B16.5 flanges interchangeable with AWWA flanges?<\/h3>\n\n\n\n<p><strong>Not by default.<\/strong> Bolt circle diameter and bolt-hole patterns may differ across standards. Always verify dimensions before mating standards in the field.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the fastest way to prevent repeat flange leaks?<\/h3>\n\n\n\n<p><strong>Control the basics:<\/strong> correct face + correct gasket + clean surfaces + uniform bolt load with a controlled tightening sequence. Many leaks come from uneven bolt load rather than wrong flange size.<\/p>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the significance of the Outside Diameter (O.D.) in ANSI flanges?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Outside Diameter (O.D.) must match the installation envelope and mating flange geometry. It helps ensure proper fit, prevents interference, and supports a stable bolted joint.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which key dimensions should you consider when selecting ANSI flanges?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Key dimensions include NPS, O.D., I.D. (bore), bolt circle diameter, bolt-hole count\/diameter, flange thickness, and face type (RF\/FF\/RTJ).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does the number of bolt holes affect flange performance?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Correct bolt-hole count and pattern support even bolt load distribution and uniform gasket compression, reducing leak risk and improving joint stability.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do you choose the right pressure rating for ANSI flanges?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Select class using pressure-temperature tables for the exact material group and service temperature, confirm the governing standard (ASME B16.5 or B16.47), then verify face type, gasket, and bolting plan.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are ASME B16.5 flanges interchangeable with AWWA flanges?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Not by default. Bolt circle diameter and bolt-hole patterns can differ across standards. Always verify dimensions before mating different standards.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the fastest way to prevent repeat flange leaks?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use the correct face and gasket, ensure clean sealing surfaces, and apply uniform bolt load using a controlled tightening sequence. Many repeat leaks are caused by uneven bolt load rather than wrong flange size.\"\n      }\n    }\n  ]\n}\n<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>You need accurate ANSI flange dimensions to ensure safe and efficient piping systems.In most industries, \u201cANSI flanges\u201d commonly refers to flanges made to ASME B16.5 (NPS 1\/2\u2033\u201324\u2033) and ASME B16.47 (NPS 26\u2033\u201360\u2033). Always select flanges using the latest standard tables, because pressure-temperature ratings depend on material group and temperature\u2014not just the class number. If you [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2693,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[41,70,111,114],"class_list":["post-2687","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-selection-comparison","tag-pf-flanges","tag-std-ansi","tag-topic-dimensions","tag-topic-selection"],"_links":{"self":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts\/2687","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/comments?post=2687"}],"version-history":[{"count":11,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts\/2687\/revisions"}],"predecessor-version":[{"id":13224,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/posts\/2687\/revisions\/13224"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/media\/2693"}],"wp:attachment":[{"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/media?parent=2687"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/categories?post=2687"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sunhyings.com\/ar\/wp-json\/wp\/v2\/tags?post=2687"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}