{"id":1173,"date":"2025-08-27T12:48:24","date_gmt":"2025-08-27T10:48:24","guid":{"rendered":"https:\/\/www.comidgroup.it\/?page_id=1173"},"modified":"2025-08-27T12:48:24","modified_gmt":"2025-08-27T10:48:24","slug":"calcolo-portata-sezione-velocita","status":"publish","type":"page","link":"https:\/\/www.comidgroup.it\/en\/nozioni-tecniche\/calcolo-portata-sezione-velocita\/","title":{"rendered":"Calcolo Portata – Sezione – Velocit\u00e0"},"content":{"rendered":"
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\n\t\t\t\n\n\n \n \n Calcolo Sezione \u2013 Portata \u2013 Velocit\u00e0<\/title>\n <style>\n :root {\n --panel: #f7f9fc;\n --ink: #0b0f14;\n --muted: #555f6e;\n --accent: #3ba0ff;\n --ok: #14b8a6;\n --warn: #f59e0b;\n --err: #ef4444;\n --radius: 16px;\n }\n html, body { height: 100%; margin: 0; padding: 0; }\n body {\n font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, \"Helvetica Neue\", Arial, \"Noto Sans\", \"Apple Color Emoji\", \"Segoe UI Emoji\";\n color: var(--ink);\n }\n .card {\n width: 100%;\n background: #ffffff; \/* bianco solo per il box *\/\n border: none;\n border-radius: 0;\n box-shadow: none;\n padding: 28px;\n box-sizing: border-box;\n }\n h1 { font-size: 28px; margin: 0 0 6px; letter-spacing: 0.3px; text-align:center; }\n p.sub { margin: 0 0 22px; color: var(--muted); text-align:center; }\n .grid { display: grid; grid-template-columns: 1fr; gap: 16px; }\n @media (min-width: 720px){ .grid { grid-template-columns: repeat(3, 1fr); } }\n .field { background: var(--panel); border: 1px solid rgba(0,0,0,0.1); border-radius: 14px; padding: 14px 14px 12px; position: relative; }\n .label { font-size: 16px; font-weight: 700; color: var(--ink); letter-spacing: .2px; display: flex; align-items: center; gap: 6px; }\n .hint { font-size: 11px; color: var(--muted); margin-top: 2px; }\n input[type=\"text\"] {\n width: 100%; margin-top: 8px; font-size: 22px; font-weight: 600; color: var(--ink);\n background: transparent; border: none; outline: none;\n }\n input[readonly] { opacity: .9; }\n .computed-badge { position: absolute; right: 12px; top: 10px; font-size: 11px; color: #fff; background: var(--ok); padding: 4px 8px; border-radius: 999px; display: none; }\n .actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; justify-content:center; }\n .btn {\n appearance: none; border: 1px solid rgba(0,0,0,0.1); background: #f1f5f9; color: var(--ink);\n padding: 10px 14px; border-radius: 12px; cursor: pointer; font-weight: 600; transition: transform .05s ease, background .2s;\n }\n .btn.primary { background: var(--accent); color: #fff; border-color: transparent; }\n .btn:hover { transform: translateY(-1px); }\n .note { margin-top: 16px; color: var(--muted); font-size: 13px; text-align:center; }\n .error { color: var(--err); font-weight: 600; margin-top: 8px; display: none; text-align:center; }\n .ok { color: var(--ok); font-weight: 600; margin-top: 8px; display: none; text-align:center; }\n .footer { margin-top: 22px; font-size: 12px; color: var(--muted); text-align:center; }\n .unit { opacity: .8; font-weight: 600; margin-left: 4px; }\n .disclaimer {\n margin-top: 20px;\n background: #fff3cd;\n color: #856404;\n border: 1px solid #ffeeba;\n padding: 12px;\n border-radius: 10px;\n font-size: 14px;\n text-align: center;\n }\n <\/style>\n<\/head>\n<body>\n <main class=\"card\" role=\"main\">\n <h1>Calcolo Sezione \u2013 Portata \u2013 Velocit\u00e0<\/h1>\n <p class=\"sub\">Calcolo ad incognita libera. Inserisci due valori e lascia vuoto il terzo, quindi premi <strong>Calcola<\/strong>.<\/p>\n <p class=\"sub\"><strong>Dimensionamento di massima di una condotta in pressione<\/strong>: Partendo da un dato di velocit\u00e0 stabilito, questo calcolo consente di determinare rapidamente la dimensione delle tubazioni.<\/p>\n\n <section class=\"grid\" aria-label=\"Campi di input\">\n <div class=\"field\" id=\"f-d\">\n <div class=\"label\">Diametro interno <span class=\"unit\">[mm]<\/span><\/div>\n <input id=\"diametro\" type=\"text\" inputmode=\"decimal\" placeholder=\"es. 40\" aria-label=\"Diametro interno in millimetri\" \/>\n <div class=\"computed-badge\" id=\"b-d\">Calcolato<\/div>\n <div class=\"hint\">Esempio: 40 \u2192 tubo PE DN 40 (D int. \u2248 31\u201335 mm secondo serie).<\/div>\n <\/div>\n\n <div class=\"field\" id=\"f-q\">\n <div class=\"label\">Portata <span class=\"unit\">[L\/s]<\/span><\/div>\n <input id=\"portata\" type=\"text\" inputmode=\"decimal\" placeholder=\"es. 1,2\" aria-label=\"Portata in litri al secondo\" \/>\n <div class=\"computed-badge\" id=\"b-q\">Calcolato<\/div>\n <div class=\"hint\">Accetta virgola o punto come separatore decimale.<\/div>\n <\/div>\n\n <div class=\"field\" id=\"f-v\">\n <div class=\"label\">Velocit\u00e0 <span class=\"unit\">[m\/s]<\/span><\/div>\n <input id=\"velocita\" type=\"text\" inputmode=\"decimal\" placeholder=\"es. 1,5\" aria-label=\"Velocit\u00e0 del fluido in metri al secondo\" \/>\n <div class=\"computed-badge\" id=\"b-v\">Calcolato<\/div>\n <div class=\"hint\">Validit\u00e0: condotta piena a sezione circolare.<\/div>\n <\/div>\n <\/section>\n\n <div class=\"actions\">\n <button class=\"btn primary\" id=\"btn-calcola\">Calcola<\/button>\n <button class=\"btn\" id=\"btn-pulisci\" aria-label=\"Pulisci campi\">Pulisci<\/button>\n <\/div>\n\n <div class=\"error\" id=\"err\"><\/div>\n <div class=\"ok\" id=\"ok\"><\/div>\n\n <p class=\"footer\">Esempio: fissata una velocit\u00e0 di 1,5 m\/s e, dalla tabella degli ugelli, ottenuta una portata di 1,2 L\/s, il calcolo restituisce un diametro interno di circa 31,9 mm (tubo PE DN 40). <br>Suggerimento: in molti impianti si imposta una velocit\u00e0 obiettivo (es. 1\u20132 m\/s) e si ricava il diametro interno necessario.<\/br><\/p>\n\n <div class=\"disclaimer\">\n Nota: i calcoli sono stati semplificati accorpando o trascurando alcuni parametri minori. I valori forniti sono solo indicativi e non sostituiscono le valutazioni complete basate sulle formule canoniche.\n <\/div>\n <\/main>\n\n <script>\n function parseNum(str){\n if(str == null) return NaN;\n const s = String(str).trim().replace(\/\\.\/g, \"\").replace(\/,\/g, \".\");\n if(!s) return NaN;\n return Number(s);\n }\n function fmt(num, digits=3){\n return Number(num).toLocaleString('it-IT', { maximumFractionDigits: digits });\n }\n function showBadge(which){\n [\"b-d\",\"b-q\",\"b-v\"].forEach(id => document.getElementById(id).style.display = (id === which ? \"inline-block\" : \"none\"));\n }\n function clearBadges(){ [\"b-d\",\"b-q\",\"b-v\"].forEach(id => document.getElementById(id).style.display = \"none\"); }\n function setMsg(type, text){\n const err = document.getElementById('err');\n const ok = document.getElementById('ok');\n err.style.display = ok.style.display = 'none';\n if(type === 'err'){ err.textContent = text; err.style.display = 'block'; }\n if(type === 'ok'){ ok.textContent = text; ok.style.display = 'block'; }\n }\n\n function calcola(){\n setMsg(); clearBadges();\n const dVal = document.getElementById('diametro').value;\n const qVal = document.getElementById('portata').value;\n const vVal = document.getElementById('velocita').value;\n\n const Dmm = parseNum(dVal);\n const Qls = parseNum(qVal);\n const Vms = parseNum(vVal);\n\n const present = [!isNaN(Dmm), !isNaN(Qls), !isNaN(Vms)].filter(Boolean).length;\n if(present !== 2){\n setMsg('err', 'Inserisci esattamente due valori e lascia vuoto il terzo.');\n return;\n }\n\n const pi = Math.PI;\n let Dm, A, Qm3s;\n\n if(isNaN(Dmm)){\n if(!(Qls > 0 && Vms > 0)) return setMsg('err', 'Portata e velocit\u00e0 devono essere positive per calcolare il diametro.');\n Qm3s = Qls \/ 1000;\n const Dm_calc = Math.sqrt((4 * Qm3s) \/ (pi * Vms));\n const Dmm_calc = Dm_calc * 1000;\n document.getElementById('diametro').value = fmt(Dmm_calc, 1);\n showBadge('b-d');\n setMsg('ok', 'Diametro calcolato.');\n return;\n }\n\n Dm = Dmm \/ 1000;\n A = pi * Math.pow(Dm\/2, 2);\n\n if(isNaN(Qls)){\n if(!(Vms > 0 && A > 0)) return setMsg('err', 'Velocit\u00e0 e diametro devono essere positivi per calcolare la portata.');\n const Qls_calc = Vms * A * 1000;\n document.getElementById('portata').value = fmt(Qls_calc, 3);\n showBadge('b-q');\n setMsg('ok', 'Portata calcolata.');\n return;\n }\n\n if(isNaN(Vms)){\n if(!(Qls > 0 && A > 0)) return setMsg('err', 'Portata e diametro devono essere positivi per calcolare la velocit\u00e0.');\n const Vms_calc = (Qls \/ 1000) \/ A;\n document.getElementById('velocita').value = fmt(Vms_calc, 3);\n showBadge('b-v');\n setMsg('ok', 'Velocit\u00e0 calcolata.');\n return;\n }\n }\n\n function pulisci(){\n ['diametro','portata','velocita'].forEach(id => document.getElementById(id).value = '');\n clearBadges();\n setMsg();\n }\n\n document.getElementById('btn-calcola').addEventListener('click', calcola);\n document.getElementById('btn-pulisci').addEventListener('click', pulisci);\n document.addEventListener('keydown', (e)=>{ if(e.key === 'Enter') calcola(); });\n <\/script>\n<\/body>\n<\/html>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"Calcolo Sezione \u2013 Portata \u2013 Velocit\u00e0 Calcolo Sezione \u2013 Portata \u2013 Velocit\u00e0 Calcolo ad incognita libera. Inserisci due valori e lascia vuoto il terzo, quindi premi Calcola. Dimensionamento di massima di una condotta in pressione: Partendo da un dato di velocit\u00e0 stabilito, questo calcolo consente di determinare rapidamente la dimensione delle tubazioni. Diametro interno [mm]…","protected":false},"author":2,"featured_media":0,"parent":778,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Calcolo Portata - Sezione - Velocit\u00e0 - Comid<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.comidgroup.it\/en\/nozioni-tecniche\/calcolo-portata-sezione-velocita\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Calcolo Portata - Sezione - Velocit\u00e0 - Comid\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.comidgroup.it\/en\/nozioni-tecniche\/calcolo-portata-sezione-velocita\/\" \/>\n<meta property=\"og:site_name\" content=\"Comid\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.comidgroup.it\/nozioni-tecniche\/calcolo-portata-sezione-velocita\/\",\"url\":\"https:\/\/www.comidgroup.it\/nozioni-tecniche\/calcolo-portata-sezione-velocita\/\",\"name\":\"Calcolo Portata - 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