{"id":100097,"date":"2026-02-15T20:16:27","date_gmt":"2026-02-15T20:16:27","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100097"},"modified":"2026-02-15T20:16:27","modified_gmt":"2026-02-15T20:16:27","slug":"flange-rating-calculator","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/nb\/calculators\/flange-rating-calculator\/","title":{"rendered":"Flensens trykk-temperaturklassifisering | ASME B16.5 \/ EN 1092"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Flange Pressure-Temperature Rating Calculator\",\"alternateName\":[\"Flange P-T Rating\",\"ASME B16.5 Calculator\",\"Flange Class Calculator\"],\"description\":\"Free online flange pressure-temperature rating calculator per ASME B16.5 and EN 1092. Determine max working pressure at given temperature for various material groups and flange classes.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/flange-rating-calculator\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"featureList\":[\"ASME B16.5 P-T tables\",\"EN 1092 support\",\"Multiple material groups\",\"Auto-calculate on input\",\"Pass\/fail check\"],\"keywords\":\"flange rating, ASME B16.5, EN 1092, pressure temperature, flange class\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What is a flange pressure-temperature rating?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A flange P-T rating defines the maximum allowable working pressure at a specific temperature for a given flange class and material group. As temperature increases, the allowable pressure decreases.\"}},\n{\"@type\":\"Question\",\"name\":\"What flange classes are defined in ASME B16.5?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ASME B16.5 defines seven pressure classes: 150, 300, 600, 900, 1500, and 2500. Each class has specific P-T ratings that vary by material group.\"}},\n{\"@type\":\"Question\",\"name\":\"How does temperature affect flange ratings?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"As temperature increases, the material strength decreases, which reduces the maximum allowable pressure. The P-T tables in ASME B16.5 account for this by providing pressure limits at various temperature steps.\"}},\n{\"@type\":\"Question\",\"name\":\"What is material group 1.1 in ASME B16.5?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Group 1.1 covers carbon steel materials such as A105, A350 LF2, and A516 Gr.70. It is the most commonly used material group for general-purpose flanges.\"}},\n{\"@type\":\"Question\",\"name\":\"Can I use ASME flanges with EN piping?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"While ASME B16.5 and EN 1092-1 flanges have different dimensions and rating systems, adaptor flanges exist. However, mixing standards requires careful engineering review of both pressure ratings and dimensional compatibility.\"}}\n]}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Flange Rating Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/flange-rating-calculator\/\"}\n]}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>\n:root{--vc-bg:#f4f1ec;--vc-surface:#ffffff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-red:#b91c1c;--vc-red-light:#fef2f2;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,0.06),0 4px 12px rgba(26,26,26,0.04);--vc-shadow-lg:0 4px 12px rgba(26,26,26,0.08),0 16px 40px rgba(26,26,26,0.06);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono','Consolas','Monaco',monospace;--vc-display:'Fraunces',Georgia,serif}\n.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 40px;-webkit-font-smoothing:antialiased}.vc-calculator *,.vc-calculator *::before,.vc-calculator *::after{box-sizing:border-box}\n.vc-header{text-align:center;padding:48px 24px 40px;position:relative}.vc-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--vc-accent);border-radius:2px}\n.vc-header-eyebrow{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:0.15em;text-transform:uppercase;color:var(--vc-accent);margin:0 0 12px}.vc-header-title{font-family:var(--vc-display);font-size:clamp(24px,4vw,36px);font-weight:800;line-height:1.15;color:var(--vc-ink);margin:0 0 16px;letter-spacing:-0.02em}.vc-header-subtitle{font-size:15px;color:var(--vc-ink-secondary);margin:0 auto 20px;max-width:600px}\n.vc-badges{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}.vc-badge{font-family:var(--vc-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;background:var(--vc-surface);border:1px solid var(--vc-border);color:var(--vc-ink-secondary)}\n.vc-card{background:var(--vc-surface);border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);box-shadow:var(--vc-shadow);overflow:hidden;margin-top:32px}\n.vc-form{padding:24px}.vc-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:600px){.vc-form-grid{grid-template-columns:1fr}}\n.vc-field{display:flex;flex-direction:column}.vc-field-full{grid-column:1\/-1}.vc-label{font-size:12px;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;color:var(--vc-ink-secondary);margin-bottom:6px}.vc-label-hint{font-weight:400;text-transform:none;letter-spacing:0;color:var(--vc-ink-muted);font-size:11px}\n.vc-select,.vc-input{width:100%;padding:10px 12px;border:1.5px solid var(--vc-border);border-radius:6px;font-family:var(--vc-font);font-size:14px;color:var(--vc-ink);background:var(--vc-surface);transition:border-color 0.15s,box-shadow 0.15s}\n.vc-select{padding-right:36px;appearance:none;-webkit-appearance:none;cursor:pointer;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' width='16' height='16' fill='none' stroke='%235a5650' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 10px center}\n.vc-select:focus,.vc-input:focus{outline:none;border-color:var(--vc-accent);box-shadow:0 0 0 3px rgba(200,90,42,0.12)}.vc-select:hover,.vc-input:hover{border-color:var(--vc-ink-muted)}\n.vc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--vc-border-light)}.vc-presets-label{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--vc-ink-muted);width:100%;margin-bottom:2px}\n.vc-preset-btn{padding:5px 12px;font-family:var(--vc-font);font-size:12px;font-weight:500;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);cursor:pointer;transition:all 0.15s}.vc-preset-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-results{border-top:1px solid var(--vc-border-light);background:var(--vc-surface-alt);padding:0;max-height:0;overflow:hidden;transition:max-height 0.5s cubic-bezier(0.4,0,0.2,1),padding 0.3s}.vc-results.vc-visible{max-height:3000px;padding:24px}\n.vc-results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.vc-results-title{font-family:var(--vc-display);font-size:20px;font-weight:700;color:var(--vc-ink);margin:0}\n.vc-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:500;color:var(--vc-ink-secondary);cursor:pointer;transition:all 0.15s}.vc-copy-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}.vc-copy-btn.vc-copied{background:var(--vc-green-light);border-color:var(--vc-green);color:var(--vc-green)}\n.vc-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}@media(max-width:500px){.vc-result-grid{grid-template-columns:1fr}}\n.vc-rcard{background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;transition:transform 0.2s}.vc-rcard:hover{transform:translateY(-1px)}\n.vc-rcard-primary{border-color:var(--vc-accent);border-width:2px;background:linear-gradient(135deg,#fdf6f2 0%,var(--vc-surface) 100%);grid-column:1\/-1}\n.vc-rcard-label{font-family:var(--vc-mono);font-size:10px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:4px}\n.vc-rcard-value{font-family:var(--vc-mono);font-size:22px;font-weight:600;color:var(--vc-ink);line-height:1.2}.vc-rcard-primary .vc-rcard-value{font-size:30px;color:var(--vc-accent)}.vc-rcard-unit{font-size:14px;font-weight:400;color:var(--vc-ink-secondary)}\n.vc-status-pass{color:var(--vc-green);font-weight:700}.vc-status-fail{color:var(--vc-red);font-weight:700}\n.vc-section{margin-top:24px;border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);background:var(--vc-surface);box-shadow:var(--vc-shadow);overflow:hidden}\n.vc-section-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border:none;background:transparent;cursor:pointer;font-family:var(--vc-font);text-align:left;transition:background 0.15s}.vc-section-toggle:hover{background:var(--vc-surface-alt)}\n.vc-section-toggle-text{display:flex;align-items:center;gap:10px}.vc-section-icon{font-size:20px;line-height:1}.vc-section-title{font-family:var(--vc-display);font-size:18px;font-weight:700;color:var(--vc-ink);margin:0}\n.vc-section-chevron{width:20px;height:20px;color:var(--vc-ink-muted);transition:transform 0.3s;flex-shrink:0}.vc-section.vc-open .vc-section-chevron{transform:rotate(180deg)}\n.vc-section-body{max-height:0;overflow:hidden;transition:max-height 0.4s cubic-bezier(0.4,0,0.2,1)}.vc-section.vc-open .vc-section-body{max-height:20000px}\n.vc-section-inner{padding:0 24px 24px;border-top:1px solid var(--vc-border-light)}\n.vc-theory h3{font-family:var(--vc-display);font-size:17px;font-weight:700;color:var(--vc-ink);margin:28px 0 10px}.vc-theory h3:first-child{margin-top:20px}.vc-theory p{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 10px}.vc-theory ul,.vc-theory ol{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 12px 18px;padding:0}.vc-theory li{margin-bottom:5px}\n.vc-formula-box{background:var(--vc-surface-alt);border:2px solid var(--vc-border);border-radius:6px;padding:14px 20px;font-family:var(--vc-mono);font-size:16px;font-weight:500;text-align:center;margin:14px 0;color:var(--vc-ink);overflow-x:auto}\n.vc-info-box{background:var(--vc-blue-light);border-left:3px solid var(--vc-blue);padding:14px 16px;border-radius:0 6px 6px 0;margin:14px 0}.vc-info-box p{margin:0;font-size:14px;color:var(--vc-ink-secondary)}\n.vc-warning-box{background:var(--vc-yellow-light);border-left:3px solid var(--vc-yellow);padding:14px 16px;border-radius:0 6px 6px 0;margin:14px 0}\n.vc-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13px}.vc-table th,.vc-table td{padding:10px 12px;border:1px solid var(--vc-border-light);text-align:left}.vc-table th{background:var(--vc-surface-alt);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;color:var(--vc-ink-secondary)}.vc-table tr:nth-child(even){background:var(--vc-surface-alt)}\n@media(max-width:600px){.vc-table{font-size:12px}.vc-table th,.vc-table td{padding:8px}}\n.vc-faq-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}.vc-faq-item{border:1px solid var(--vc-border-light);border-radius:6px;overflow:hidden}\n.vc-faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:none;background:var(--vc-surface-alt);cursor:pointer;font-family:var(--vc-font);font-size:15px;font-weight:600;color:var(--vc-ink);text-align:left;transition:background 0.15s}.vc-faq-q:hover{background:#ede9e3}\n.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform 0.25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}\n.vc-faq-a{max-height:0;overflow:hidden;transition:max-height 0.35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}\n.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-faq-a-inner ul{margin:4px 0 8px 16px;padding:0}.vc-faq-a-inner li{margin-bottom:3px}\n.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all 0.15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background 0.15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\n.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-flange-rating\">\n\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Flange Pressure\u2013Temperature Rating<\/h1>\n    <p class=\"vc-header-subtitle\">Determine the maximum allowable working pressure for flanges per ASME B16.5. Select material group, class, and operating temperature.<\/p>\n    <div class=\"vc-badges\">\n        <span class=\"vc-badge\">ASME B16.5<\/span>\n        <span class=\"vc-badge\">EN 1092-1<\/span>\n        <span class=\"vc-badge\">Class 150\u20132500<\/span>\n    <\/div>\n<\/header>\n\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-standard\">Standard<\/label>\n                <select class=\"vc-select\" id=\"vc-standard\">\n                    <option value=\"asme\" selected>ASME B16.5<\/option>\n                    <option value=\"en\">EN 1092-1<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-material\">Material Group<\/label>\n                <select class=\"vc-select\" id=\"vc-material\">\n                    <option value=\"1.1\" selected>1.1 \u2014 Carbon Steel (A105, A350 LF2)<\/option>\n                    <option value=\"1.2\">1.2 \u2014 Carbon Steel (A350 LF6 Cl.1)<\/option>\n                    <option value=\"2.1\">2.1 \u2014 Stainless 304 (A182 F304)<\/option>\n                    <option value=\"2.2\">2.2 \u2014 Stainless 316 (A182 F316)<\/option>\n                    <option value=\"2.3\">2.3 \u2014 Alloy (A182 F304L\/F316L)<\/option>\n                    <option value=\"3.1\">3.1 \u2014 Alloy Steel (A182 F11 Cl.2)<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-class\">Flange Class<\/label>\n                <select class=\"vc-select\" id=\"vc-class\">\n                    <option value=\"150\" selected>Class 150<\/option>\n                    <option value=\"300\">Class 300<\/option>\n                    <option value=\"600\">Class 600<\/option>\n                    <option value=\"900\">Class 900<\/option>\n                    <option value=\"1500\">Class 1500<\/option>\n                    <option value=\"2500\">Class 2500<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-temp\">Operating Temperature <span class=\"vc-label-hint\">(\u00b0C)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-temp\" inputmode=\"decimal\" step=\"any\" placeholder=\"e.g. 200\" value=\"200\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-pressure\">Operating Pressure <span class=\"vc-label-hint\">(bar g) \u2014 optional check<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-pressure\" inputmode=\"decimal\" step=\"any\" placeholder=\"e.g. 15\" value=\"\">\n            <\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"1.1\" data-c=\"150\" data-t=\"100\">CS 150 \/ 100\u00b0C<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"1.1\" data-c=\"300\" data-t=\"200\">CS 300 \/ 200\u00b0C<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"2.1\" data-c=\"150\" data-t=\"150\">SS304 150 \/ 150\u00b0C<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"2.2\" data-c=\"300\" data-t=\"300\">SS316 300 \/ 300\u00b0C<\/button>\n        <\/div>\n    <\/form>\n\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\">\n            <h2 class=\"vc-results-title\">Results<\/h2>\n            <button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\">\n                <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy\n            <\/button>\n        <\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\">\n                <div class=\"vc-rcard-label\">Max Allowable Pressure at Temperature<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-maxp\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Flange Class<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-class\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Material Group<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-mat\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Operating Temperature<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-temp\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Pressure Check<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-check\">\u2014<\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Theory -->\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\">\n        <span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; P-T Tables<\/span><\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner vc-theory\">\n            <h3>Pressure-Temperature Rating Concept<\/h3>\n            <p>ASME B16.5 provides pressure-temperature ratings for flanges in classes 150, 300, 600, 900, 1500, and 2500. The maximum allowable working pressure decreases as temperature increases, since material strength reduces at elevated temperatures.<\/p>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <h3>Material Groups<\/h3>\n            <table class=\"vc-table\">\n                <thead><tr><th>Group<\/th><th>Materials<\/th><th>ASTM Specs<\/th><\/tr><\/thead>\n                <tbody>\n                    <tr><td>1.1<\/td><td>Carbon Steel<\/td><td>A105, A350 LF2, A516 Gr.70<\/td><\/tr>\n                    <tr><td>1.2<\/td><td>Carbon Steel (Normalized)<\/td><td>A350 LF6 Cl.1<\/td><\/tr>\n                    <tr><td>2.1<\/td><td>18Cr-8Ni Stainless<\/td><td>A182 F304, A240 304<\/td><\/tr>\n                    <tr><td>2.2<\/td><td>16Cr-12Ni-2Mo Stainless<\/td><td>A182 F316, A240 316<\/td><\/tr>\n                    <tr><td>2.3<\/td><td>Low-Carbon Stainless<\/td><td>A182 F304L, F316L<\/td><\/tr>\n                    <tr><td>3.1<\/td><td>1\u00bcCr-\u00bdMo Alloy<\/td><td>A182 F11 Cl.2<\/td><\/tr>\n                <\/tbody>\n            <\/table>\n            <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary);\"><strong>\u26a0\ufe0f Note:<\/strong> This calculator provides reference values. Always verify against the full ASME B16.5 or EN 1092-1 tables for critical applications. Values are interpolated between temperature steps.<\/p><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Related -->\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-related\">\n                <a class=\"vc-related-link\" href=\"\/calculators\/safety-valve-sizing\/\">Safety Valve Sizing<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/ip-rating-decoder\/\">IP Rating Decoder<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/measurement-uncertainty\/\">Measurement Uncertainty<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- FAQ -->\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span>\n        <svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-promo\">\n    <div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional field balancing instruments and software. Used in 50+ countries.<\/div>\n    <a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a>\n<\/div>\n\n<footer class=\"vc-footer\">\n    <p>&copy; 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p>\n    <p style=\"font-size:12px;margin-top:4px;\">Based on ASME B16.5 \/ EN 1092-1. Last updated: February 2025<\/p>\n    <div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div>\n<\/footer>\n<\/div>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';\n    var SLUG='flange-rating-calculator';\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n))return'\u2014';var f=n.toFixed(d===undefined?2:d);return f.replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n\n    \/* P-T data: temperatures in \u00b0C, pressures in bar g \u2014 simplified ASME B16.5 tables *\/\n    var TEMPS = [-29, 38, 100, 150, 200, 250, 300, 350, 400, 450, 500, 538];\n    var PT = {\n        '1.1': {\n            '150':  [19.6, 19.6, 17.7, 15.8, 13.8, 12.1, 10.2, 8.4, 6.5, 4.5, 2.8, 1.4],\n            '300':  [51.1, 51.1, 46.6, 45.1, 43.2, 40.4, 37.3, 34.0, 27.4, 19.2, 11.6, 5.8],\n            '600':  [102.1, 102.1, 93.2, 90.2, 86.4, 80.8, 74.6, 67.9, 54.8, 38.4, 23.2, 11.5],\n            '900':  [153.2, 153.2, 139.8, 135.3, 129.6, 121.2, 111.9, 101.9, 82.2, 57.6, 34.8, 17.3],\n            '1500': [255.3, 255.3, 233.0, 225.5, 216.0, 202.0, 186.5, 169.8, 137.0, 96.0, 58.0, 28.8],\n            '2500': [425.5, 425.5, 388.4, 375.8, 360.0, 336.7, 310.8, 283.0, 228.3, 160.0, 96.7, 48.0]\n        },\n        '1.2': {\n            '150':  [19.6, 19.6, 18.2, 16.4, 14.5, 12.8, 11.0, 9.2, 7.2, 5.0, 3.2, 1.8],\n            '300':  [51.1, 51.1, 48.0, 46.0, 44.5, 42.0, 39.0, 36.0, 29.8, 21.0, 13.2, 6.5],\n            '600':  [102.1, 102.1, 96.0, 92.0, 89.0, 84.0, 78.0, 72.0, 59.6, 42.0, 26.4, 13.0],\n            '900':  [153.2, 153.2, 144.0, 138.0, 133.5, 126.0, 117.0, 108.0, 89.4, 63.0, 39.6, 19.5],\n            '1500': [255.3, 255.3, 240.0, 230.0, 222.5, 210.0, 195.0, 180.0, 149.0, 105.0, 66.0, 32.5],\n            '2500': [425.5, 425.5, 400.0, 383.3, 370.8, 350.0, 325.0, 300.0, 248.3, 175.0, 110.0, 54.2]\n        },\n        '2.1': {\n            '150':  [15.9, 15.9, 13.8, 12.4, 11.2, 10.3, 9.6, 9.1, 8.7, 8.5, 8.3, 8.1],\n            '300':  [41.4, 41.4, 36.2, 32.5, 29.5, 27.2, 25.3, 24.0, 23.0, 22.5, 22.0, 21.5],\n            '600':  [82.7, 82.7, 72.3, 65.0, 59.0, 54.4, 50.6, 48.0, 46.0, 45.0, 44.0, 43.0],\n            '900':  [124.1, 124.1, 108.5, 97.5, 88.5, 81.6, 75.9, 72.0, 69.0, 67.5, 66.0, 64.5],\n            '1500': [206.8, 206.8, 180.8, 162.5, 147.5, 136.0, 126.5, 120.0, 115.0, 112.5, 110.0, 107.5],\n            '2500': [344.7, 344.7, 301.4, 270.8, 245.8, 226.7, 210.8, 200.0, 191.7, 187.5, 183.3, 179.2]\n        },\n        '2.2': {\n            '150':  [15.9, 15.9, 14.1, 12.8, 11.7, 10.8, 10.2, 9.7, 9.3, 9.0, 8.8, 8.5],\n            '300':  [41.4, 41.4, 37.1, 33.6, 30.8, 28.4, 26.8, 25.5, 24.4, 23.8, 23.2, 22.5],\n            '600':  [82.7, 82.7, 74.2, 67.2, 61.6, 56.8, 53.6, 51.0, 48.8, 47.6, 46.4, 45.0],\n            '900':  [124.1, 124.1, 111.3, 100.8, 92.4, 85.2, 80.4, 76.5, 73.2, 71.4, 69.6, 67.5],\n            '1500': [206.8, 206.8, 185.5, 168.0, 154.0, 142.0, 134.0, 127.5, 122.0, 119.0, 116.0, 112.5],\n            '2500': [344.7, 344.7, 309.2, 280.0, 256.7, 236.7, 223.3, 212.5, 203.3, 198.3, 193.3, 187.5]\n        },\n        '2.3': {\n            '150':  [12.1, 12.1, 11.2, 10.5, 10.0, 9.6, 9.2, 8.8, 8.5, 8.2, 8.0, 7.8],\n            '300':  [31.7, 31.7, 29.4, 27.5, 26.2, 25.2, 24.2, 23.2, 22.3, 21.5, 21.0, 20.5],\n            '600':  [63.4, 63.4, 58.8, 55.0, 52.4, 50.4, 48.4, 46.4, 44.6, 43.0, 42.0, 41.0],\n            '900':  [95.1, 95.1, 88.2, 82.5, 78.6, 75.6, 72.6, 69.6, 66.9, 64.5, 63.0, 61.5],\n            '1500': [158.5, 158.5, 147.0, 137.5, 131.0, 126.0, 121.0, 116.0, 111.5, 107.5, 105.0, 102.5],\n            '2500': [264.2, 264.2, 245.0, 229.2, 218.3, 210.0, 201.7, 193.3, 185.8, 179.2, 175.0, 170.8]\n        },\n        '3.1': {\n            '150':  [19.6, 19.6, 18.4, 17.1, 15.8, 14.8, 13.8, 13.2, 12.7, 12.0, 7.4, 4.6],\n            '300':  [51.1, 51.1, 48.2, 44.8, 41.5, 38.8, 36.1, 34.6, 33.2, 31.4, 19.4, 12.0],\n            '600':  [102.1, 102.1, 96.4, 89.6, 83.0, 77.6, 72.2, 69.2, 66.4, 62.8, 38.8, 24.0],\n            '900':  [153.2, 153.2, 144.6, 134.4, 124.5, 116.4, 108.3, 103.8, 99.6, 94.2, 58.2, 36.0],\n            '1500': [255.3, 255.3, 241.0, 224.0, 207.5, 194.0, 180.5, 173.0, 166.0, 157.0, 97.0, 60.0],\n            '2500': [425.5, 425.5, 401.7, 373.3, 345.8, 323.3, 300.8, 288.3, 276.7, 261.7, 161.7, 100.0]\n        }\n    };\n\n    function interp(tArr, pArr, t) {\n        if (t <= tArr[0]) return pArr[0];\n        if (t >= tArr[tArr.length-1]) return pArr[pArr.length-1];\n        for (var i = 0; i < tArr.length - 1; i++) {\n            if (t >= tArr[i] && t <= tArr[i+1]) {\n                var frac = (t - tArr[i]) \/ (tArr[i+1] - tArr[i]);\n                return pArr[i] + frac * (pArr[i+1] - pArr[i]);\n            }\n        }\n        return pArr[pArr.length-1];\n    }\n\n    function calculate() {\n        var mat = $('vc-material').value;\n        var cls = $('vc-class').value;\n        var temp = parseFloat($('vc-temp').value);\n        var pOp = parseFloat($('vc-pressure').value);\n        if (isNaN(temp)) { $('vc-results').classList.remove('vc-visible'); return; }\n        var ptData = PT[mat] && PT[mat][cls];\n        if (!ptData) { $('vc-results').classList.remove('vc-visible'); return; }\n\n        var maxP = interp(TEMPS, ptData, temp);\n        $('vc-r-maxp').innerHTML = fmt(maxP, 1) + ' <span class=\"vc-rcard-unit\">bar g<\/span>';\n        $('vc-r-class').textContent = 'Class ' + cls;\n        $('vc-r-mat').textContent = 'Group ' + mat;\n        $('vc-r-temp').innerHTML = fmt(temp, 0) + ' <span class=\"vc-rcard-unit\">\u00b0C<\/span>';\n\n        if (!isNaN(pOp) && pOp > 0) {\n            if (pOp <= maxP) {\n                $('vc-r-check').innerHTML = '<span class=\"vc-status-pass\">\u2713 PASS<\/span> <span class=\"vc-rcard-unit\">' + fmt(pOp,1) + ' bar \u2264 ' + fmt(maxP,1) + ' bar<\/span>';\n            } else {\n                $('vc-r-check').innerHTML = '<span class=\"vc-status-fail\">\u2717 FAIL<\/span> <span class=\"vc-rcard-unit\">' + fmt(pOp,1) + ' bar > ' + fmt(maxP,1) + ' bar<\/span>';\n            }\n        } else {\n            $('vc-r-check').innerHTML = '<span class=\"vc-rcard-unit\">Enter operating pressure to check<\/span>';\n        }\n\n        $('vc-results').classList.add('vc-visible');\n        saveHistory({ mat:mat, cls:cls, temp:temp, maxP:fmt(maxP,1), _summary:'Class '+cls+', Grp '+mat+', '+fmt(temp,0)+'\u00b0C \u2192 '+fmt(maxP,1)+' bar' });\n    }\n\n    $('vc-form').addEventListener('input', calculate);\n    $('vc-form').addEventListener('change', calculate);\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){\n        btn.addEventListener('click', function(e){\n            e.preventDefault();\n            $('vc-material').value=this.getAttribute('data-m');\n            $('vc-class').value=this.getAttribute('data-c');\n            $('vc-temp').value=this.getAttribute('data-t');\n            calculate();\n        });\n    });\n\n    $('vc-copy-btn').addEventListener('click', function(){\n        var text='Flange P-T Rating\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nClass: '+$('vc-r-class').textContent+'\\nMaterial: '+$('vc-r-mat').textContent+'\\nTemperature: '+$('vc-r-temp').textContent+'\\nMax Pressure: '+$('vc-r-maxp').textContent+'\\nCheck: '+$('vc-r-check').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu\/calculators\/flange-rating-calculator\/';\n        if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var btn=$('vc-copy-btn');btn.classList.add('vc-copied');btn.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';setTimeout(function(){btn.classList.remove('vc-copied');btn.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy';},2000);})}\n    });\n\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n\n    var faqData=[\n        {q:'What is a flange pressure-temperature rating?',a:'<p>A flange P-T rating defines the <strong>maximum allowable working pressure<\/strong> at a specific temperature for a given flange class and material group. As temperature increases, the allowable pressure decreases because material strength reduces.<\/p>'},\n        {q:'What flange classes are in ASME B16.5?',a:'<p>ASME B16.5 defines six pressure classes: <strong>150, 300, 600, 900, 1500, and 2500<\/strong>. Each class has specific P-T ratings that vary by material group. Higher classes allow higher pressures.<\/p>'},\n        {q:'How does temperature affect the rating?',a:'<p>As temperature increases, material yield and tensile strength decrease. The P-T tables in ASME B16.5 reflect this with <strong>lower allowable pressures at higher temperatures<\/strong>. Values are given at specific temperature steps with linear interpolation between them.<\/p>'},\n        {q:'What is material group 1.1?',a:'<p>Group 1.1 covers <strong>carbon steel<\/strong> materials including A105, A350 LF2, and A516 Gr.70. It is the most commonly used material group for general-purpose flanges in non-corrosive services.<\/p>'},\n        {q:'Can I mix ASME and EN flanges?',a:'<p>ASME B16.5 and EN 1092-1 flanges have <strong>different dimensions and bolt patterns<\/strong>. Mixing requires adaptor flanges and careful engineering review of both pressure ratings and dimensional compatibility. It is generally not recommended without proper analysis.<\/p>'}\n    ];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\n\n    function saveHistory(entry){var key='vc_history_'+SLUG;var arr=[];try{arr=JSON.parse(localStorage.getItem(key))||[]}catch(e){}entry._ts=new Date().toISOString();arr.unshift(entry);if(arr.length>10)arr=arr.slice(0,10);try{localStorage.setItem(key,JSON.stringify(arr))}catch(e){}}\n\n    function init(){\n        try{katex.render('P_{\\\\max}(T) = \\\\text{interpolated from P-T table for class and material group}', $('vc-katex-1'),{displayMode:true,throwOnError:false})}catch(e){}\n        calculate();\n    }\n    if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',init);else init();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Gratis kalkulator for flens-PT-klassifisering i henhold til ASME B16.5 og EN 1092. Skriv inn materialgruppe, flensklasse og temperatur for \u00e5 finne maksimalt arbeidstrykk.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100097","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100097","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100097\/revisions"}],"predecessor-version":[{"id":100399,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/calculator\/100097\/revisions\/100399"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/media?parent=100097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/categories?post=100097"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/nb\/wp-json\/wp\/v2\/tags?post=100097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}