{"id":3389,"date":"2026-09-07T15:03:18","date_gmt":"2026-09-07T15:03:18","guid":{"rendered":"https:\/\/ultrasuonindt.it\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/"},"modified":"2026-09-12T18:39:18","modified_gmt":"2026-09-12T18:39:18","slug":"astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact","status":"publish","type":"page","link":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/","title":{"rendered":"ASTM E797 \u2014 Mesure d&rsquo;\u00e9paisseur par la m\u00e9thode \u00e9cho-impulsion au contact"},"content":{"rendered":"\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:36%\">\n<figure class=\"wp-block-image size-large has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"680\" height=\"680\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?resize=680%2C680&#038;ssl=1\" alt=\"Mesure d'&#xE9;paisseur sur pi&#xE8;ce m&#xE9;canique &#xE0; faces parall&#xE8;les\" class=\"wp-image-1045\" style=\"border-color:#000000;border-width:1px;border-radius:15px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?w=680&amp;ssl=1 680w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 680px) 100vw, 680px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:4%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<div class=\"wp-block-group has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-top-right-radius:6px;border-bottom-right-radius:6px;border-left-color:#225f78;border-left-width:6px;background-color:#ebf1f4;padding-top:24px;padding-right:28px;padding-bottom:24px;padding-left:28px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#225f78;font-size:clamp(14px, 0.875rem + ((1vw - 3.2px) * 0.408), 18px);font-style:italic;font-weight:400;line-height:1.6\">L&rsquo;ASTM E797 fournit les lignes directrices pour mesurer l&rsquo;\u00e9paisseur par la m\u00e9thode \u00e9cho-impulsion au contact, \u00e0 des temp\u00e9ratures n&rsquo;exc\u00e9dant pas 93 \u00b0C.<\/p>\n<\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\" style=\"list-style:none;padding-left:0px;line-height:1.6\">\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> \u00c9dition en vigueur : ASTM E797\/E797M-21<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> M\u00e9thode \u00e9cho-impulsion au contact<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> Limite de temp\u00e9rature d\u00e9clar\u00e9e : 93 \u00b0C (200 \u00b0F)<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> Con\u00e7ue avant tout pour des composants plans \u00e0 faces parall\u00e8les<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">Dans la pratique anglophone, la mesure d&rsquo;\u00e9paisseur par ultrasons au contact a pour r\u00e9f\u00e9rence l&rsquo;ASTM E797, dont la d\u00e9signation en vigueur est ASTM E797\/E797M-21. Le document \u00ab provides guidelines for measuring the thickness of materials using the contact pulse-echo method at temperatures not to exceed 93 \u00b0C (200 \u00b0F) \u00bb, c&rsquo;est-\u00e0-dire qu&rsquo;il fournit des lignes directrices pour mesurer l&rsquo;\u00e9paisseur des mat\u00e9riaux par la m\u00e9thode \u00e9cho-impulsion au contact \u00e0 des temp\u00e9ratures n&rsquo;exc\u00e9dant pas 93 \u00b0C (200 \u00b0F). <\/p>\n\n<p class=\"wp-block-paragraph\">Deux indications de ce domaine ont un effet imm\u00e9diat sur le travail de terrain. La premi\u00e8re est la limite de temp\u00e9rature : au-del\u00e0 de 93 \u00b0C on se situe hors du domaine d\u00e9clar\u00e9 par la pratique, et la mesure sur paroi chaude doit \u00eatre mise en \u0153uvre avec des sondes et des couplants d\u00e9di\u00e9s, en v\u00e9rifiant les conditions admises par la documentation des composants employ\u00e9s. La seconde est la condition sur le mat\u00e9riau : la pratique s&rsquo;applique \u00e0 tout mat\u00e9riau dans lequel les ondes ultrasonores se propagent \u00e0 vitesse constante et dans lequel des r\u00e9flexions de fond peuvent \u00eatre obtenues, un crit\u00e8re qui englobe de nombreux mat\u00e9riaux et en exclut d&rsquo;autres pour des raisons physiques.  <\/p>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-cover is-light popmake-4066 popmake-739\" style=\"border-width:1px;min-height:250px;aspect-ratio:unset;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"250\" class=\"wp-block-cover__image-background wp-image-727 size-full\" alt=\"\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=1200%2C250&#038;ssl=1\" data-object-fit=\"cover\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?w=1200&amp;ssl=1 1200w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=300%2C63&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=1024%2C213&amp;ssl=1 1024w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/banner_technical_support_choose_products.png?resize=768%2C160&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-30 has-background-dim\" style=\"background-color:#d3d6dc\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-15701bb7 wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-right has-ti-fg-color is-style-default has-luminous-vivid-amber-color has-text-color has-link-color wp-elements-1 wp-block-paragraph\" style=\"font-size:clamp(21.536px, 1.346rem + ((1vw - 3.2px) * 1.374), 35px);\"><strong>Besoin d&rsquo;aide pour choisir le produit adapt\u00e9 ?<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-b507c051 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button popmake-4066 popmake-739\"><a class=\"wp-block-button__link has-ti-accent-color has-cyan-bluish-gray-background-color has-text-color has-background has-link-color wp-element-button\">Contactez-nous<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\">Vient ensuite une pr\u00e9cision sur la g\u00e9om\u00e9trie qui explique bien des \u00e9carts de mesure. L&rsquo;ASTM E797 est con\u00e7ue principalement pour des composants plans \u00e0 faces parall\u00e8les ; sur des surfaces non parall\u00e8les ou concentriques, son applicabilit\u00e9 est limit\u00e9e. Cela ne signifie pas qu&rsquo;on ne puisse pas mesurer sur un tube de petit diam\u00e8tre, mais que le r\u00e9sultat doit \u00eatre interpr\u00e9t\u00e9 en tenant compte de la courbure et de la g\u00e9om\u00e9trie du r\u00e9flecteur de fond, et que les conditions de la mesure doivent \u00eatre d\u00e9clar\u00e9es dans le rapport.  <\/p>\n\n<h2 class=\"wp-block-heading\">Les points fixes de la pratique<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Aspect<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Contenu confirm\u00e9<\/th><\/tr><\/thead><tbody><tr><td>D\u00e9signation<\/td><td>ASTM E797\/E797M-21<\/td><\/tr><tr><td>M\u00e9thode<\/td><td>\u00c9cho-impulsion au contact<\/td><\/tr><tr><td>Temp\u00e9rature<\/td><td>N&rsquo;exc\u00e9dant pas 93 \u00b0C (200 \u00b0F)<\/td><\/tr><tr><td>Mat\u00e9riaux<\/td><td>Vitesse de propagation constante et r\u00e9flexions de fond obtenables<\/td><\/tr><tr><td>G\u00e9om\u00e9trie<\/td><td>Composants plans \u00e0 faces parall\u00e8les ; limit\u00e9e sur surfaces non parall\u00e8les ou concentriques<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Ce que cela implique dans le choix de l&rsquo;instrument<\/h2>\n\n<div class=\"wp-block-columns are-vertically-aligned-top is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:36%\">\n<figure class=\"wp-block-image size-large has-custom-border\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"960\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?resize=960%2C960&#038;ssl=1\" alt=\"R&#xE9;glage de l'&#xE9;paisseurm&#xE8;tre avant la mesure\" class=\"wp-image-984\" style=\"border-color:#000000;border-width:1px;border-radius:15px\" srcset=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?resize=768%2C768&amp;ssl=1 768w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:4%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:60%\">\n<p class=\"wp-block-paragraph\">Puisque la pratique d\u00e9crit la m\u00e9thode \u00e9cho-impulsion au contact, ce qu&rsquo;il faut est un instrument qui travaille ainsi et un traducteur adapt\u00e9 \u00e0 la pi\u00e8ce. La gamme Dakota NDT couvre les deux cas typiques : la mesure de corrosion sur paroi industrielle et la mesure de pr\u00e9cision sur composants usin\u00e9s, avec un \u00e9talonnage \u00e0 un ou deux points sur des \u00e9prouvettes d&rsquo;\u00e9paisseur connue. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sur les parois o\u00f9 la lecture au contact peut \u00eatre perturb\u00e9e, les instruments dot\u00e9s de l&rsquo;affichage A-Scan permettent d&rsquo;observer l&rsquo;\u00e9cho au lieu de se fier au seul chiffre. Plusieurs mod\u00e8les indiquent dans leur documentation la conformit\u00e9 d\u00e9clar\u00e9e \u00e0 l&rsquo;ASTM E797 : la v\u00e9rification doit se faire sur la fiche du mod\u00e8le concern\u00e9, car la d\u00e9claration porte sur le produit et non sur la marque. <\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Instruments conseill\u00e9s<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Instrument<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">Emploi typique<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/ultrasuonindt.it\/prodotti\/misuratori-di-spessore\/dakota-pmx3-dl-precisione-con-a-scan\/\">Dakota PMX3-DL<\/a><\/td><td>Mesure de pr\u00e9cision avec affichage A-Scan<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/fr\/produits\/epaisseurmetres\/dakota-cmx2-dl-epaisseurmetre-corrosion-avec-a-scan\/\">Dakota CMX2-DL<\/a><\/td><td>Mesure de corrosion au contact avec A-Scan<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/prodotti\/sonde-e-accessori\/trasduttori-spessimetri-precisione\/\">Traducteurs de pr\u00e9cision<\/a><\/td><td>Sondes pour composants usin\u00e9s \u00e0 faces parall\u00e8les<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/prodotti\/sonde-e-accessori\/liquidi-accoppianti-ultrasonici\/\">Couplants<\/a><\/td><td>Couplage sonde-pi\u00e8ce dans la mesure au contact<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Questions fr\u00e9quentes<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1757400201\"><strong class=\"schema-faq-question\">Jusqu&rsquo;\u00e0 quelle temp\u00e9rature l&rsquo;ASTM E797 s&rsquo;applique-t-elle ?<\/strong><p class=\"schema-faq-answer\">Le domaine d&rsquo;application indique des temp\u00e9ratures n&rsquo;exc\u00e9dant pas 93 degr\u00e9s Celsius, soit 200 degr\u00e9s Fahrenheit.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757400202\"><strong class=\"schema-faq-question\">\u00c0 quels mat\u00e9riaux est-elle applicable ?<\/strong><p class=\"schema-faq-answer\">\u00c0 tout mat\u00e9riau dans lequel les ondes ultrasonores se propagent \u00e0 vitesse constante et dans lequel des r\u00e9flexions de fond peuvent \u00eatre obtenues.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757400203\"><strong class=\"schema-faq-question\">Vaut-elle aussi sur des surfaces courbes ?<\/strong><p class=\"schema-faq-answer\">La pratique est con\u00e7ue principalement pour des composants plans \u00e0 faces parall\u00e8les et son applicabilit\u00e9 est limit\u00e9e sur des surfaces non parall\u00e8les ou concentriques.<\/p><\/div><\/div>\n\n<p class=\"wp-block-paragraph\">Retour \u00e0 <a href=\"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/\">Normes pour la mesure d&rsquo;\u00e9paisseur<\/a> ou \u00e9crivez-nous depuis la page <a href=\"https:\/\/ultrasuonindt.it\/fr\/contacts\/\">Contact<\/a>.<\/p>\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h5 class=\"wp-block-heading\">Informations compl\u00e9mentaires et contacts <\/h5>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Partenaire division syst\u00e8mes et int\u00e9gration de capteurs : <a href=\"http:\/\/www.roder.it\">www.roder.it<\/a><br\/>Plus d&rsquo;informations sur RODER SRL : <a href=\"https:\/\/ultrasuonindt.it\/chi-siamo\/\">qui sommes-nous<\/a><br\/>Contact pour informations g\u00e9n\u00e9rales : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/>Contact pour informations sur ces produits : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><br\/>Les informations contenues dans cette page web sont fournies \u00e0 titre purement informatif. Bien qu&rsquo;elles aient \u00e9t\u00e9 \u00e9labor\u00e9es avec le plus grand soin, elles ne constituent ni une offre contractuelle ni un engagement contraignant de fourniture. Elles peuvent contenir des erreurs de transcription, de traduction ou des coquilles. Pour des informations pr\u00e9cises et \u00e0 jour, nous vous invitons \u00e0 contacter directement notre soci\u00e9t\u00e9.    <\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Certaines images pr\u00e9sentes sur ce site web ont \u00e9t\u00e9 intentionnellement g\u00e9n\u00e9r\u00e9es \u00e0 l&rsquo;aide de l&rsquo;Intelligence Artificielle (IA). Cela tient au fait que, pour de nombreuses applications et projets, il n&rsquo;est pas possible de divulguer des photographies de l&rsquo;installation ou du syst\u00e8me r\u00e9el en raison d&rsquo;accords de confidentialit\u00e9, de clauses de confidentialit\u00e9 et d&rsquo;accords de non-divulgation (NDA). <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;ASTM E797 fournit les lignes directrices pour mesurer l&rsquo;\u00e9paisseur par la m\u00e9thode \u00e9cho-impulsion au contact, \u00e0 des temp\u00e9ratures n&rsquo;exc\u00e9dant pas 93 \u00b0C. Dans la pratique anglophone, la mesure d&rsquo;\u00e9paisseur par ultrasons au contact a pour r\u00e9f\u00e9rence l&rsquo;ASTM E797, dont la d\u00e9signation en vigueur est ASTM E797\/E797M-21. Le document \u00ab provides guidelines for measuring the thickness [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":3210,"parent":4602,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"ASTM E797 : mesure d'\u00e9paisseur \u00e9cho-impulsion au contact","_yoast_wpseo_metadesc":"Les lignes directrices ASTM E797\/E797M-21 pour la mesure \u00e9cho-impulsion au contact, avec la limite d\u00e9clar\u00e9e de 93 \u00b0C et les composants plans \u00e0 faces parall\u00e8les.","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":""},"class_list":["post-3389","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ASTM E797 : mesure d&#039;\u00e9paisseur \u00e9cho-impulsion au contact<\/title>\n<meta name=\"description\" content=\"Les lignes directrices ASTM E797\/E797M-21 pour la mesure \u00e9cho-impulsion au contact, avec la limite d\u00e9clar\u00e9e de 93 \u00b0C et les composants plans \u00e0 faces parall\u00e8les.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ASTM E797 : mesure d&#039;\u00e9paisseur \u00e9cho-impulsion au contact\" \/>\n<meta property=\"og:description\" content=\"Les lignes directrices 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Fahrenheit.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/#faq-question-1757400202","position":2,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/#faq-question-1757400202","name":"\u00c0 quels mat\u00e9riaux est-elle applicable ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"\u00c0 tout mat\u00e9riau dans lequel les ondes ultrasonores se propagent \u00e0 vitesse constante et dans lequel des r\u00e9flexions de fond peuvent \u00eatre obtenues.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/#faq-question-1757400203","position":3,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/astm-e797-mesure-depaisseur-par-la-methode-echo-impulsion-au-contact\/#faq-question-1757400203","name":"Vaut-elle aussi sur des surfaces courbes ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"La pratique est con\u00e7ue principalement pour des composants plans \u00e0 faces parall\u00e8les et son applicabilit\u00e9 est limit\u00e9e sur des surfaces non parall\u00e8les ou concentriques.","inLanguage":"fr-FR"},"inLanguage":"fr-FR"}]}},"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/PeHTL3-SF","jetpack-related-posts":[{"id":4602,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/normes-pour-la-mesure-depaisseur\/","url_meta":{"origin":3389,"position":0},"title":"Normes pour la mesure d&rsquo;\u00e9paisseur","author":"GSM","date":"7 septembre 2026","format":false,"excerpt":"Quatre normes r\u00e9gissent deux plans distincts : comment on effectue la mesure d'\u00e9paisseur et comment on v\u00e9rifie que l'instrument avec lequel on l'effectue est \u00e0 la hauteur. \u2713 EN 14127 et ISO 16809 : les principes de la mesure par contact direct \u2713 ASTM E797 : la pratique am\u00e9ricaine de\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"Palpeur \u00e0 ultrasons Dakota NDT pendant la proc\u00e9dure d'\u00e9talonnage et de 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L'appareil chronom\u00e8tre le trajet et le convertit en \u00e9paisseur. Tout le reste est une variation sur ce th\u00e8me. \u2713 Mesure du temps de vol entre impulsion \u00e9mise et \u00e9cho de fond \u2713\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"Dakota NDT PMX3-DL application r\u00e9elle de mesure \u00e0 ultrasons sur pi\u00e8ce m\u00e9canique","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":4468,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/mesure-depaisseur-par-ultrasons\/","url_meta":{"origin":3389,"position":2},"title":"Mesure d&rsquo;\u00e9paisseur par ultrasons","author":"GSM","date":"7 septembre 2026","format":false,"excerpt":"Une impulsion, un \u00e9cho, un temps de vol : c'est de l\u00e0 que na\u00eet la mesure d'\u00e9paisseur. Tout le reste \u2014 les modes, le calibrage, le scan mode \u2014 sert \u00e0 rendre ce temps fiable sur des pi\u00e8ces r\u00e9elles. \u2713 Mesure d'un seul c\u00f4t\u00e9, sans couper ni d\u00e9monter la pi\u00e8ce\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"Dakota NDT PMX3-DL application r\u00e9elle de mesure \u00e0 ultrasons sur pi\u00e8ce m\u00e9canique","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_PMX3-DL_applicazione_reale_di_misura_su_pezzo_meccanico-web-680x680-1.webp?fit=680%2C680&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":4449,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/","url_meta":{"origin":3389,"position":3},"title":"Technologies et Normes END","author":"GSM","date":"7 septembre 2026","format":false,"excerpt":"Choisir un instrument, c'est choisir une m\u00e9thode de mesure. Cette section explique comment fonctionne le contr\u00f4le par ultrasons, ce qui distingue un mode de l'autre et quelles normes r\u00e9gissent la mati\u00e8re. \u2713 Les modes de mesure expliqu\u00e9s un par un, avec leur emploi \u2713 D\u00e9tection de d\u00e9fauts : A-Scan, B-Scan,\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"Main tenant un palpeur \u00e0 ultrasons Dakota NDT pendant l'inspection","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_mano_che_tiene_in_posizione_sonda_ad-ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_mano_che_tiene_in_posizione_sonda_ad-ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_mano_che_tiene_in_posizione_sonda_ad-ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_mano_che_tiene_in_posizione_sonda_ad-ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-immagine_con_mano_che_tiene_in_posizione_sonda_ad-ultrasuoni-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":3108,"url":"https:\/\/ultrasuonindt.it\/fr\/applications\/oil-gas-et-petrochimie\/","url_meta":{"origin":3389,"position":4},"title":"Oil &#038; Gas et P\u00e9trochimie","author":"GSM","date":"7 septembre 2026","format":false,"excerpt":"Dans le secteur Oil & Gas, la mesure d'\u00e9paisseur ne sert pas \u00e0 d\u00e9crire une installation : elle sert \u00e0 d\u00e9cider si celle-ci peut rester en service. Les instruments Dakota NDT r\u00e9pondent aux exigences des inspections API 570 et API 653, mesurent \u00e0 travers le rev\u00eatement et archivent la valeur\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"Dakota NDT CMX3-DL application de mesure de corrosion par ultrasons sur r\u00e9servoirs et citernes","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CMX3-DL_applicazione_misura_di_corrosione_su_serbatoi_e_cisterne-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CMX3-DL_applicazione_misura_di_corrosione_su_serbatoi_e_cisterne-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CMX3-DL_applicazione_misura_di_corrosione_su_serbatoi_e_cisterne-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CMX3-DL_applicazione_misura_di_corrosione_su_serbatoi_e_cisterne-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CMX3-DL_applicazione_misura_di_corrosione_su_serbatoi_e_cisterne-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":4940,"url":"https:\/\/ultrasuonindt.it\/fr\/technologies-et-normes-end\/mesure-depaisseur-par-ultrasons\/echo-echo-et-thrupaint\/","url_meta":{"origin":3389,"position":5},"title":"Echo-Echo et ThruPaint\u2122","author":"GSM","date":"7 septembre 2026","format":false,"excerpt":"Au lieu de chronom\u00e9trer le trajet de la sonde au fond, on chronom\u00e8tre le tron\u00e7on entre deux \u00e9chos de fond successifs. Le rev\u00eatement reste hors du comptage, et la peinture n'a plus \u00e0 \u00eatre retir\u00e9e. \u2713 Mesure du seul m\u00e9tal, avec le rev\u00eatement en place \u2713 Aucun meulage du point\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"Dakota NDT CX application de mesure d'\u00e9paisseur par ultrasons sur pi\u00e8ces de charpente","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?fit=1200%2C1200&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/pages\/3389","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/users\/157040980"}],"replies":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/comments?post=3389"}],"version-history":[{"count":4,"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/pages\/3389\/revisions"}],"predecessor-version":[{"id":4316,"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/pages\/3389\/revisions\/4316"}],"up":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/pages\/4602"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/media\/3210"}],"wp:attachment":[{"href":"https:\/\/ultrasuonindt.it\/fr\/wp-json\/wp\/v2\/media?parent=3389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}