{"id":4462,"date":"2026-03-25T03:26:15","date_gmt":"2026-03-25T03:26:15","guid":{"rendered":"https:\/\/hydrathpower.com\/?p=4462"},"modified":"2026-03-25T03:26:15","modified_gmt":"2026-03-25T03:26:15","slug":"filettature-idrauliche-bsp-vs-npt-vs-identificazione-metrica","status":"publish","type":"post","link":"https:\/\/hydrathpower.com\/it\/hydraulic-threads-bsp-vs-npt-vs-metric-identification\/","title":{"rendered":"Filettature idrauliche: BSP vs NPT vs identificazione metrica"},"content":{"rendered":"<article>\n<h2><span style=\"font-size: 1.7em;\">Definizione<\/span><\/h2>\n<section id=\"definition-en\">Le filettature sono scanalature elicoidali utilizzate per assemblare e sigillare i componenti. In idraulica, le filettature sono presenti su raccordi e bocche; forniscono un fissaggio meccanico e, con il giusto profilo o elemento di tenuta, realizzano connessioni a tenuta sotto pressione.<\/section>\n<h2>Come identificare<\/h2>\n<ol>\n<li>Misurare il diametro: usare i calibri per misurare il diametro maggiore\/minore (OD\/ID), mantenendo le unit\u00e0 di misura coerenti (mm o pollici).<\/li>\n<li>Determinare il passo: utilizzare un calibro per il passo della filettatura; distinguere TPI (imperiale) da mm (metrico).<\/li>\n<li>Controllare la direzione: destra o sinistra; considerare le applicazioni con carico inverso.<\/li>\n<li>Identificare conicit\u00e0 vs. parallelismo: misurare la OD su diverse creste; una OD variabile indica conicit\u00e0; una OD costante indica parallelismo.<\/li>\n<li>Mappa degli standard e della sigillatura: <a href=\"https:\/\/cdn.standards.iteh.ai\/samples\/33777\/842b7c5409454ceba69c7dad9c308be1\/ISO-228-1-2000.pdf\">BSPP (ISO 228-1)<\/a> parallelo utilizza rondelle\/guarnizioni incollate; le porte coniche BSPT (ISO 7-1)\/NPT (ASME B1.20.1) necessitano di sigillante; le porte metriche (ISO 261\/724\/965) e SAE O-ring (ISO 11926\/SAE J1926) utilizzano O-ring.<br \/>\n<img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/measure-thread-pitch-_-TPI-vs-mm-300x202.jpg\" class=\"alignnone wp-image-4465 lazyload\" alt=\"misurare il passo della filettatura _ TPI vs mm\" width=\"175\" height=\"118\"><noscript><img decoding=\"async\" class=\"alignnone wp-image-4465\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/measure-thread-pitch-_-TPI-vs-mm-300x202.jpg\" alt=\"misurare il passo della filettatura _ TPI vs mm\" width=\"175\" height=\"118\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/measure-thread-pitch-_-TPI-vs-mm-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/measure-thread-pitch-_-TPI-vs-mm-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/measure-thread-pitch-_-TPI-vs-mm-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/measure-thread-pitch-_-TPI-vs-mm.jpg 869w\" sizes=\"(max-width: 175px) 100vw, 175px\" \/><\/noscript> <img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/left\u2011hand-threads-usage-300x202.jpg\" class=\"alignnone wp-image-4467 lazyload\" alt=\"utilizzo della filettatura sinistra\" width=\"195\" height=\"131\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4467\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/left\u2011hand-threads-usage-300x202.jpg\" alt=\"utilizzo della filettatura sinistra\" width=\"195\" height=\"131\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/left\u2011hand-threads-usage-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/left\u2011hand-threads-usage-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/left\u2011hand-threads-usage-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/left\u2011hand-threads-usage.jpg 869w\" sizes=\"(max-width: 195px) 100vw, 195px\" \/><\/noscript> <img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/identify-taper-vs-parallel-threads-300x202.jpg\" class=\"alignnone wp-image-4466 lazyload\" alt=\"identificare le filettature coniche rispetto a quelle parallele\" width=\"154\" height=\"104\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4466\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/identify-taper-vs-parallel-threads-300x202.jpg\" alt=\"identificare le filettature coniche rispetto a quelle parallele\" width=\"154\" height=\"104\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/identify-taper-vs-parallel-threads-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/identify-taper-vs-parallel-threads-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/identify-taper-vs-parallel-threads-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/identify-taper-vs-parallel-threads.jpg 869w\" sizes=\"(max-width: 154px) 100vw, 154px\" \/><\/noscript><\/li>\n<\/ol>\n<section id=\"how-to-identify-cn\"><\/section>\n<section id=\"profiles\">\n<h2>Profili del filo<\/h2>\n<ul>\n<li>Profilo a V: Buona resistenza e versatilit\u00e0; ampiamente utilizzato in elementi di fissaggio e raccordi idraulici generici.<\/li>\n<li>Quadrato: Basso attrito, elevata capacit\u00e0 di carico; si trovano comunemente nelle trasmissioni e nelle viti a ricircolo di sfere.<\/li>\n<li>Acme: Pi\u00f9 facile da produrre; compromesso tra capacit\u00e0 di carico e attrito.<\/li>\n<li>Buttress: Adatto per applicazioni con elevata forza assiale in una direzione.<\/li>\n<li>Filettatura conica: Consente di ottenere una tenuta resistente alla pressione (<a href=\"https:\/\/www.ralstoninst.com\/news\/story\/the-difference-between-npt-bspp-and-bspt-seals\">BSPT\/NPT<\/a>) attraverso il cono e il sigillante.<img loading=\"lazy\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" data-src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/types-of-threads-300x202.jpg\" class=\"alignnone size-medium wp-image-4464 lazyload\" style=\"font-style: inherit; font-weight: inherit;\" alt=\"tipi di fili\" width=\"300\" height=\"202\"><noscript><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4464\" style=\"font-style: inherit; font-weight: inherit;\" src=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/types-of-threads-300x202.jpg\" alt=\"tipi di fili\" width=\"300\" height=\"202\" srcset=\"https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/types-of-threads-300x202.jpg 300w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/types-of-threads-768x518.jpg 768w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/types-of-threads-18x12.jpg 18w, https:\/\/hydrathpower.com\/wp-content\/uploads\/2026\/03\/types-of-threads.jpg 869w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/noscript><\/li>\n<\/ul>\n<\/section>\n<section id=\"codes-pairing-en\">\n<h2>Codici e abbinamenti<\/h2>\n<ul>\n<li>BSP (55\u00b0): filettature parallele BSPP\/G non a tenuta; filettature a tenuta serie R<\/li>\n<li>Rp: femmina parallela; Rc: femmina conica (1:16); R1: maschio conico per Rp; R2: maschio conico per Rc<\/li>\n<li>Accoppiamento: Rp+R1 per una tenuta generica; Rc+R2 per pressioni pi\u00f9 elevate; utilizzare il sigillante, evitare l'eccessiva nastratura<\/li>\n<li>ANSI (60\u00b0): NPT a tenuta conica (1:16); NPTF a tenuta stagna; NPS diritto (NPSM meccanico, NPSF carburante, NPSH tubo flessibile) richiede guarnizioni ausiliarie<\/li>\n<li>Metrico (60\u00b0): Le filettature parallele M richiedono rondelle\/anelli; variante conica aerospaziale MJ<\/li>\n<li>Mappatura JIS\/DIN: JIS PT\u2248Rc; JIS PF\u2248G; DIN 2999 con la serie R; DIN 3852 per raccordi metrici con attacco a vite<\/li>\n<li>Porte e facce: SAE J514 ORB, JIC 37\u00b0, SAE 45\u00b0, ORFS O-ring a faccia piana<\/li>\n<\/ul>\n<\/section>\n<section id=\"codes-pairing-cn\"><\/section>\n<section id=\"comparison-en\">\n<h2>BSPP vs BSPT vs NPT vs Metrico<\/h2>\n<table>\n<thead>\n<tr>\n<th>Caratteristica<\/th>\n<th>BSPP (ISO 228-1)<\/th>\n<th>BSPT (ISO 7-1)<\/th>\n<th><a href=\"https:\/\/www.armechalloys.com\/pdf\/ansi-b1-20-1.pdf\">NPT (ASME B1.20.1)<\/a><\/th>\n<th>Metrico (ISO 261\/724\/965)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Forma del filo<\/td>\n<td>Parallelo (G)<\/td>\n<td>Conico (R)<\/td>\n<td>Affusolato<\/td>\n<td>Parallelo<\/td>\n<\/tr>\n<tr>\n<td>Metodo di tenuta<\/td>\n<td>Rondella\/guarnizione incollata\/faccia dell'anello<\/td>\n<td>Sigillante sulle filettature<\/td>\n<td>Sigillante sulle filettature<\/td>\n<td>Porta per rondella\/anello<\/td>\n<\/tr>\n<tr>\n<td>Utilizzo tipico<\/td>\n<td>Porte e raccordi idraulici<\/td>\n<td>Connessioni dei tubi<\/td>\n<td>Connessioni dei tubi<\/td>\n<td>Raccordi e filettature di macchina<\/td>\n<\/tr>\n<tr>\n<td>Attenzione alla miscelazione<\/td>\n<td>Non mescolare con NPT<\/td>\n<td>Non mescolare con NPT\/BSPP<\/td>\n<td>Non mescolare con BSP<\/td>\n<td>Passo e tolleranza della partita<\/td>\n<\/tr>\n<tr>\n<td>Identificazione<\/td>\n<td>OD costante lungo la lunghezza<\/td>\n<td>Variazione del diametro esterno (conicit\u00e0)<\/td>\n<td>Variazione del diametro esterno (conicit\u00e0)<\/td>\n<td>OD costante; passo metrico<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<section id=\"comparison-cn\"><\/section>\n<section id=\"pros-cons-en\">\n<h2>Pro e contro<\/h2>\n<ul>\n<li>Vantaggi: fasi di identificazione chiare, riduzione delle perdite grazie a una scelta corretta delle guarnizioni, conversioni pi\u00f9 sicure tra gli standard.<\/li>\n<li>Svantaggi: gli errori di misura portano a discrepanze; la miscelazione degli standard provoca perdite o danni.<\/li>\n<\/ul>\n<\/section>\n<section id=\"pros-cons-cn\"><\/section>\n<section id=\"faq\">\n<h2>FAQ<\/h2>\n<details>\n<summary>Come distinguere il BSP dal NPT?<\/summary>\n<p>Il BSP utilizza un profilo a 55\u00b0; il NPT a 60\u00b0. Il BSPP \u00e8 parallelo; il BSPT\/NPT \u00e8 rastremato. Misurare il diametro esterno lungo diverse creste e verificare il passo; non mescolare.<\/p>\n<\/details>\n<details>\n<summary>Le filettature parallele si sigillano senza sigillante?<\/summary>\n<p>S\u00ec, con guarnizione\/rondella incollata o O-ring frontale (ad esempio, porte BSPP). La tenuta avviene sulla superficie, non nella filettatura.<\/p>\n<\/details>\n<details>\n<summary>Passo metrico o imperiale: come si misura?<\/summary>\n<p>Utilizzare un calibro per il passo; in metrico si legge mm per filettatura; in imperiale si legge TPI. Convertire in modo coerente e verificare con calibri e tabelle.<\/p>\n<\/details>\n<details>\n<summary>Quando usare la filettatura sinistra?<\/summary>\n<p>Da utilizzare nei casi in cui le filettature destre possono allentarsi in caso di rotazione o carico inverso.<\/p>\n<\/details>\n<\/section>\n<\/article>","protected":false},"excerpt":{"rendered":"<p>Definition Threads are helical grooves used to assemble and seal components. In hydraulics, threads appear on fittings and ports; they [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4463,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4462","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hydraulic Threads: BSP vs NPT vs Metric Identification - Hydrath Power<\/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:\/\/hydrathpower.com\/it\/filettature-idrauliche-bsp-vs-npt-vs-identificazione-metrica\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hydraulic Threads: BSP vs NPT vs Metric Identification - Hydrath Power\" \/>\n<meta property=\"og:description\" content=\"Definition Threads are helical grooves used to assemble and seal components. 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