{"id":4654,"date":"2026-09-07T14:06:07","date_gmt":"2026-09-07T14:06:07","guid":{"rendered":"https:\/\/ultrasuonindt.it\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/"},"modified":"2026-09-14T07:15:13","modified_gmt":"2026-09-14T07:15:13","slug":"standards-for-bolted-joint-tightening","status":"publish","type":"page","link":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/","title":{"rendered":"Standards for bolted joint tightening"},"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=\"700\" height=\"700\" src=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?resize=700%2C700&#038;ssl=1\" alt=\"Ultrasonic measurement of the load of a bolt in a joint\" class=\"wp-image-997\" 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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?w=700&amp;ssl=1 700w, https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?resize=150%2C150&amp;ssl=1 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/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\">Two worlds with different needs: the sealing of a pressurised flange and the strength of a structural connection. Both depend on the actual bolt load, but they govern it with distinct rules. <\/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> ASME PCC-1: guidelines for pressure-boundary flanged joints<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> EN 1090-2: execution of steel structures, connections included<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> Bolt load as the quantity that decides sealing<\/li>\n\n\n\n<li style=\"list-style:none\"><strong style=\"color:#225f78\">\u2713<\/strong> Prescribed preload control methods and available methods<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<p class=\"wp-block-paragraph\">ASME PCC-1 collects guidelines for the assembly of bolted flanged joints that form a pressure boundary, and applies to joints with ring-type gaskets entirely contained within the bolt circle. It is not a prescriptive code but a guidance document, which also addresses the training and qualification of those who physically carry out the assembly. <\/p>\n\n<p class=\"wp-block-paragraph\">EN 1090-2 instead belongs to the world of construction: it specifies the requirements for the execution of steel structures and devotes a section to bolted connections, distinguishing between non-preloaded and preloaded assemblies and regulating the preparation of contact surfaces in slip-resistant connections.<\/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>Need help choosing the right product?<\/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\">Contact us<\/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\">On preload control, EN 1090-2 provides four methods: the torque method, the combined method, the HRC method and the direct tension indicator method. These are methods acting on torque, rotation, shearing of the spline end or deformation of an indicating washer: ultrasonic measurement of elongation is not among these four. <\/p>\n\n<h2 class=\"wp-block-heading\">The references in this section<\/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\">Reference<\/th><th style=\"background-color:#225f78;color:#ffffff;padding:10px\">What it governs<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/asme-pcc-1\/\">ASME PCC-1<\/a><\/td><td>Assembly of pressure-boundary bolted flanged joints<\/td><\/tr><tr><td><a href=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/en-1090-and-structural-connections\/\">EN 1090 and structural connections<\/a><\/td><td>Execution of steel structures and tightening of preloaded assemblies<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Where ultrasonic measurement fits in<\/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=\"1200\" height=\"1200\" 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?resize=1200%2C1200&#038;ssl=1\" alt=\"Bolted connection of a steel structure\" class=\"wp-image-1014\" 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_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?w=1200&amp;ssl=1 1200w, 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?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_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=1024%2C1024&amp;ssl=1 1024w, 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?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-strumento_CX_applicazione_misura_spessore_su_parti_di_carpenteria-web-1200x1200-1.webp?resize=768%2C768&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/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\">It is worth being explicit: where a standard prescribes a tightening method, that method must be followed. Ultrasonic measurement of elongation does not replace the procedure required by the specification or by the applicable standard. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its ground is another: knowing the actual load of a bolt, verifying uniformity across a ring of studs, rechecking the same joint after a period of time to recognise loosening in progress. The method is described in the <a href=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/ultrasonic-bolt-tension\/\">Ultrasonic bolt tension<\/a> section. <\/p>\n<\/div>\n<\/div>\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1757272001\"><strong class=\"schema-faq-question\">Does ultrasonic measurement replace the methods provided by EN 1090-2?<\/strong><p class=\"schema-faq-answer\">No. EN 1090-2 provides four methods for tightening preloaded assemblies: torque, combined, HRC and direct tension indicators. Where the standard or the specification prescribes a method, that method must be followed.  <\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757272002\"><strong class=\"schema-faq-question\">Is ASME PCC-1 a mandatory code?<\/strong><p class=\"schema-faq-answer\">It is a guidance document for the assembly of pressure-boundary bolted flanged joints, not a prescriptive code. It becomes binding when a contract or a company procedure expressly refers to it. <\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1757272003\"><strong class=\"schema-faq-question\">What, then, is the point of measuring elongation?<\/strong><p class=\"schema-faq-answer\">Knowing the actual load of the individual bolt, verifying the uniformity of tightening across the whole joint and rechecking the same element over time, provided the reference reading on the unloaded bolt was recorded at assembly.<\/p><\/div><\/div>\n\n<p class=\"wp-block-paragraph\">Go back to <a href=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/\">NDT Technologies and Standards<\/a> or write to us from the <a href=\"https:\/\/ultrasuonindt.it\/en\/contact\/\">Contact<\/a> page.<\/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\">Further information and contacts <\/h5>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><a href=\"http:\/\/www.roder.it\">Systems division and sensor integration partner : www.roder.it<\/a><br\/><a href=\"https:\/\/ultrasuonindt.it\/chi-siamo\/\">More information about RODER SRL : about us<\/a><br\/>Contact for general information : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/>Contact for information about these products : <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\/>The information contained on this web page is provided for information purposes only. Although it has been compiled with the utmost care, it does not constitute a contractual offer or a binding commitment to supply. It may contain transcription, translation or typographical errors. For precise and up-to-date information, please contact our company directly.    <\/p>\n\n\n\n<p class=\"has-small-font-size wp-block-paragraph\">Some images on this website have been intentionally generated using Artificial Intelligence (AI). This is because, for many applications and projects, it is not possible to disclose photographs of the installation or of the actual system due to confidentiality agreements, confidentiality clauses and non-disclosure agreements (NDAs). <\/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>Two worlds with different needs: the sealing of a pressurised flange and the strength of a structural connection. Both depend on the actual bolt load, but they govern it with distinct rules. ASME PCC-1 collects guidelines for the assembly of bolted flanged joints that form a pressure boundary, and applies to joints with ring-type gaskets [&hellip;]<\/p>\n","protected":false},"author":157040980,"featured_media":2763,"parent":4444,"menu_order":10,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"bolted joint tightening standards","_yoast_wpseo_title":"Norme per il serraggio bullonato | Dakota NDT","_yoast_wpseo_metadesc":"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.","_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,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"footnotes":""},"class_list":["post-4654","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Norme per il serraggio bullonato | Dakota NDT<\/title>\n<meta name=\"description\" content=\"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.\" \/>\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\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Norme per il serraggio bullonato | Dakota NDT\" \/>\n<meta property=\"og:description\" content=\"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/\" \/>\n<meta property=\"og:site_name\" content=\"ULTRASUONI NDT\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-14T07:15:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"700\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/\",\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/\",\"name\":\"Norme per il serraggio bullonato | Dakota NDT\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1\",\"datePublished\":\"2026-09-07T14:06:07+00:00\",\"dateModified\":\"2026-09-14T07:15:13+00:00\",\"description\":\"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272001\"},{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272002\"},{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272003\"}],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#primaryimage\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1\",\"width\":700,\"height\":700,\"caption\":\"Dakota NDT BT Bolt Tension Monitor ultrasonic bolt elongation measurement application\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"NDT Technologies and Standards\",\"item\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Standards for bolted joint tightening\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/\",\"name\":\"ULTRASUONI NDT\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#organization\",\"name\":\"RODER SRL\",\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1\",\"contentUrl\":\"https:\\\/\\\/i0.wp.com\\\/ultrasuonindt.it\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1\",\"width\":1000,\"height\":330,\"caption\":\"RODER SRL\"},\"image\":{\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/roder-srl\"]},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272001\",\"position\":1,\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272001\",\"name\":\"Does ultrasonic measurement replace the methods provided by EN 1090-2?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. EN 1090-2 provides four methods for tightening preloaded assemblies: torque, combined, HRC and direct tension indicators. Where the standard or the specification prescribes a method, that method must be followed.  \",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272002\",\"position\":2,\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272002\",\"name\":\"Is ASME PCC-1 a mandatory code?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is a guidance document for the assembly of pressure-boundary bolted flanged joints, not a prescriptive code. It becomes binding when a contract or a company procedure expressly refers to it. \",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272003\",\"position\":3,\"url\":\"https:\\\/\\\/ultrasuonindt.it\\\/en\\\/ndt-technologies-and-standards\\\/standards-for-bolted-joint-tightening\\\/#faq-question-1757272003\",\"name\":\"What, then, is the point of measuring elongation?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Knowing the actual load of the individual bolt, verifying the uniformity of tightening across the whole joint and rechecking the same element over time, provided the reference reading on the unloaded bolt was recorded at assembly.\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Norme per il serraggio bullonato | Dakota NDT","description":"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/","og_locale":"en_US","og_type":"article","og_title":"Norme per il serraggio bullonato | Dakota NDT","og_description":"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.","og_url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/","og_site_name":"ULTRASUONI NDT","article_modified_time":"2026-09-14T07:15:13+00:00","og_image":[{"width":700,"height":700,"url":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1","type":"image\/webp"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":["WebPage","FAQPage"],"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/","url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/","name":"Norme per il serraggio bullonato | Dakota NDT","isPartOf":{"@id":"https:\/\/ultrasuonindt.it\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#primaryimage"},"image":{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#primaryimage"},"thumbnailUrl":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1","datePublished":"2026-09-07T14:06:07+00:00","dateModified":"2026-09-14T07:15:13+00:00","description":"ASME PCC-1 for pressure-boundary flanged joints and EN 1090-2 for preloaded structural connections: scope and preload control.","breadcrumb":{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272001"},{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272002"},{"@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272003"}],"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#primaryimage","url":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1","contentUrl":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1","width":700,"height":700,"caption":"Dakota NDT BT Bolt Tension Monitor ultrasonic bolt elongation measurement application"},{"@type":"BreadcrumbList","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/ultrasuonindt.it\/en\/"},{"@type":"ListItem","position":2,"name":"NDT Technologies and Standards","item":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/"},{"@type":"ListItem","position":3,"name":"Standards for bolted joint tightening"}]},{"@type":"WebSite","@id":"https:\/\/ultrasuonindt.it\/en\/#website","url":"https:\/\/ultrasuonindt.it\/en\/","name":"ULTRASUONI NDT","description":"","publisher":{"@id":"https:\/\/ultrasuonindt.it\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ultrasuonindt.it\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/ultrasuonindt.it\/en\/#organization","name":"RODER SRL","url":"https:\/\/ultrasuonindt.it\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ultrasuonindt.it\/en\/#\/schema\/logo\/image\/","url":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1","contentUrl":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/logo_ultrasuoni_ndt.png?fit=1000%2C330&ssl=1","width":1000,"height":330,"caption":"RODER SRL"},"image":{"@id":"https:\/\/ultrasuonindt.it\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/roder-srl"]},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272001","position":1,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272001","name":"Does ultrasonic measurement replace the methods provided by EN 1090-2?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No. EN 1090-2 provides four methods for tightening preloaded assemblies: torque, combined, HRC and direct tension indicators. Where the standard or the specification prescribes a method, that method must be followed.  ","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272002","position":2,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272002","name":"Is ASME PCC-1 a mandatory code?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"It is a guidance document for the assembly of pressure-boundary bolted flanged joints, not a prescriptive code. It becomes binding when a contract or a company procedure expressly refers to it. ","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272003","position":3,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/#faq-question-1757272003","name":"What, then, is the point of measuring elongation?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Knowing the actual load of the individual bolt, verifying the uniformity of tightening across the whole joint and rechecking the same element over time, provided the reference reading on the unloaded bolt was recorded at assembly.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/PeHTL3-1d4","jetpack-related-posts":[{"id":5208,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/asme-pcc-1\/","url_meta":{"origin":4654,"position":0},"title":"ASME PCC-1","author":"GSM","date":"7 September 2026","format":false,"excerpt":"ASME PCC-1 collects guidelines for the assembly of pressure-boundary flange joints. It is not a mandatory code: it is a good-practice reference that many organisations choose to adopt. \u2713 2022 edition, superseding the 2019 edition \u2713 Flange joints with ring-type gaskets \u2713 Appendix A: training and qualification of assemblers \u2713\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT BT Bolt Tension Monitor ultrasonic bolt elongation measurement application","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3366,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/standards-for-bolted-joint-tightening\/en-1090-and-structural-connections\/","url_meta":{"origin":4654,"position":1},"title":"EN 1090 and structural connections","author":"GSM","date":"7 September 2026","format":false,"excerpt":"In steel structures the preloading of bolts is not an assembly detail: it is an execution requirement, and the standard states by which methods it can be achieved. \u2713 EN 1090-2:2018 (+A1:2024), technical requirements for steel structures \u2713 Section 8 deals with bolted connections \u2713 Four preloading methods confirmed by\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT CX ultrasonic thickness measurement application on fabricated steel parts","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":[]},{"id":4444,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/","url_meta":{"origin":4654,"position":2},"title":"NDT Technologies and Standards","author":"GSM","date":"7 September 2026","format":false,"excerpt":"Choosing an instrument means choosing a measuring method. This section explains how ultrasonic testing works, what sets one mode apart from another and which standards govern the subject. \u2713 The measuring modes explained one by one, with their use \u2713 Flaw detection: A-Scan, B-Scan, reference curves \u2713 Transducers, coupling and\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Hand holding a Dakota NDT ultrasonic probe during an 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":5087,"url":"https:\/\/ultrasuonindt.it\/en\/ndt-technologies-and-standards\/ultrasonic-bolt-tension\/ultrasonic-method-and-torque-wrench\/","url_meta":{"origin":4654,"position":3},"title":"Ultrasonic method and torque wrench","author":"GSM","date":"7 September 2026","format":false,"excerpt":"They are not two ways of measuring the same thing. The wrench measures the effort needed to turn the nut; the ultrasonic method measures how much the bolt has stretched. Friction stands between the two. \u2713 The torque wrench measures a torque, not a load \u2713 Friction absorbs a variable\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT BT Bolt Tension Monitor ultrasonic bolt elongation measurement application","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":3549,"url":"https:\/\/ultrasuonindt.it\/en\/support\/","url_meta":{"origin":4654,"position":4},"title":"Support","author":"GSM","date":"16 April 2026","format":false,"excerpt":"RODER SRL is the official Dakota NDT distributor and works alongside you throughout the life cycle of the instrumentation: from the initial choice to operator training, from periodic checks to extraordinary repairs. This page brings together in one place the services, the documentation and the technical guides: below you will\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT ultrasonic probe during a calibration and setting procedure","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?fit=960%2C960&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_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?fit=960%2C960&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_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?fit=960%2C960&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_sonda_e_procedura_di_taratura_e_calibrazione-web-960x960-1.webp?fit=960%2C960&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":5385,"url":"https:\/\/ultrasuonindt.it\/en\/applications\/automotive-and-motorsport\/controlled-tightening-of-critical-components\/","url_meta":{"origin":4654,"position":5},"title":"Controlled tightening of critical components","author":"GSM","date":"7 September 2026","format":false,"excerpt":"On connecting rods, cylinder heads and driveline components the torque applied does not say how hard the bolt is really pulling: friction and surface finish absorb a variable part of it. Ultrasonic measurement of the elongation returns the actual load, bolt by bolt. \u2713 The bolt\u2019s real load instead of\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"Dakota NDT BT Bolt Tension Monitor ultrasonic bolt elongation measurement application","src":"https:\/\/i0.wp.com\/ultrasuonindt.it\/wp-content\/uploads\/2026\/04\/dakota_ndt-strumenti_di_misura_ad_ultrasuoni-strumento_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&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_bt_bolt_tension_monitor_per-applicazioni_di_misura_elongazione_bulloni-web-700x700-1.webp?fit=700%2C700&ssl=1&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/4654","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/users\/157040980"}],"replies":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/comments?post=4654"}],"version-history":[{"count":2,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/4654\/revisions"}],"predecessor-version":[{"id":5210,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/4654\/revisions\/5210"}],"up":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/pages\/4444"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media\/2763"}],"wp:attachment":[{"href":"https:\/\/ultrasuonindt.it\/en\/wp-json\/wp\/v2\/media?parent=4654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}