{"id":1326,"date":"2024-04-15T15:38:54","date_gmt":"2024-04-15T07:38:54","guid":{"rendered":"https:\/\/www.jsc-safe.com\/?p=1326"},"modified":"2024-05-13T15:32:54","modified_gmt":"2024-05-13T07:32:54","slug":"ndt-magnetic-testing-magnetic-particle-inspection-for-pressure-vessel","status":"publish","type":"post","link":"https:\/\/www.jsc-safe.com\/?p=1326","title":{"rendered":"NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel"},"content":{"rendered":"

NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel<\/strong><\/h1>\n

NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) is widely used in nondestructive testing of pressure vessels. The testing methods are as follows:\"\"<\/h2>\n

The principle is:<\/h3>\n

The magnetic field will be applied to the specimen, steel and other strong magnetic materials can be strongly magnetized by the magnetic field. If there is a crack on the specimen, and the direction of the crack and the direction of magnetization is right angle, then the magnetic pole appears at the crack, and magnetic leakage field is produced.<\/p>\n

When fine particles of magnetic particles enter the leakage field, they are attracted and left behind. Because the leakage magnetic field is wider than the crack, the accumulated magnetic powder can be easily seen by the naked eye.<\/p>\n

When the magnetization is high enough, even if the crack is very small, it can form a clearly visible magnetic leakage field. If the fluorescent magnetizing fluid is used, then the small cracks, folds, pores, slag and other surface defects on the specimen will show up as yellow-green lines or dotted lines under UV irradiation.<\/p>\n

Magnetic testing operations<\/h3>\n

Magnetic testing operations include pre-treatment, magnetization, application of magnetic particles, observation records and post-treatment (including demagnetization). The direction of the detected crack should be considered when magnetizing the specimen, and the magnetic field should be applied in the direction perpendicular to the crack direction.<\/p>\n

The actual applied magnetization method is shown in the diagram below, where the magnetic field direction is represented by a magnetic field line (dotted line) . Because the direction of the crack is often difficult to predict, it is often used in practice to obtain a magnetic field perpendicular to each other’s composite magnetization method.<\/p>\n

The surface magnetic field strength<\/h3>\n

The surface magnetic field strength can be calculated from the size of the specimen and the current value.<\/p>\n

Magnetic testing<\/h3>\n

Magnetic testing is highly accurate, it can identify surface crack and other shallow depth of the surface defects, but can not determine the depth of defects, can not be used to detect internal defects.<\/p>\n

Magnetizing methods<\/h3>\n

There are many magnetizing methods, such as axial electrifying method, direct current electrifying method, electrode penetration method, coil method, inter-pole method, magnetic penetration method, etc. .<\/p>\n

Learn more our project quality managemet, QAQC and third party inspection (TPI), NDT practices thru below link.-<\/p>\n

https:\/\/www.jsc-safe.com\/category\/mining-metals\/<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) is widely used in nondestructive testing of pressure vessels. The testing methods are as follows: The principle is: The magnetic field will be applied to the specimen, steel and other strong magnetic […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"footnotes":""},"categories":[4],"tags":[72,73,74],"class_list":["post-1326","post","type-post","status-publish","format-aside","category-ndt","tag-magnetic-testing","tag-mt","tag-pressure-vessel","post_format-post-format-aside","czr-hentry"],"yoast_head":"\nNDT - Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel<\/title>\n<meta name=\"description\" content=\"NDT MT MPI Pressure Vessel - MPI is an important method for detecting surface defects, MT operations, The surface magnetic field strength, Magnetic testing is highly accurate, There are many magnetizing methods.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jsc-safe.com\/?p=1326\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NDT - Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel\" \/>\n<meta property=\"og:description\" content=\"NDT MT MPI Pressure Vessel - MPI is an important method for detecting surface defects, MT operations, The surface magnetic field strength, Magnetic testing is highly accurate, There are many magnetizing methods.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jsc-safe.com\/?p=1326\" \/>\n<meta property=\"og:site_name\" content=\"JSC SAFE\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=100006428552877\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-15T07:38:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-13T07:32:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mlwbeysh49ih.i.optimole.com\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/www.jsc-safe.com\/wp-content\/uploads\/2024\/04\/NDT-MT-MPI-Pressure-Vessel.png\" \/>\n<meta name=\"author\" content=\"jscadmin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"jscadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.jsc-safe.com\/?p=1326#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.jsc-safe.com\/?p=1326\"},\"author\":{\"name\":\"jscadmin\",\"@id\":\"https:\/\/www.jsc-safe.com\/#\/schema\/person\/475b6cef7eaf4f9c1b6874d5d6504377\"},\"headline\":\"NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel\",\"datePublished\":\"2024-04-15T07:38:54+00:00\",\"dateModified\":\"2024-05-13T07:32:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.jsc-safe.com\/?p=1326\"},\"wordCount\":415,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.jsc-safe.com\/#organization\"},\"keywords\":[\"Magnetic testing\",\"MT\",\"Pressure vessel\"],\"articleSection\":[\"NDT\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.jsc-safe.com\/?p=1326#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jsc-safe.com\/?p=1326\",\"url\":\"https:\/\/www.jsc-safe.com\/?p=1326\",\"name\":\"NDT - Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel\",\"isPartOf\":{\"@id\":\"https:\/\/www.jsc-safe.com\/#website\"},\"datePublished\":\"2024-04-15T07:38:54+00:00\",\"dateModified\":\"2024-05-13T07:32:54+00:00\",\"description\":\"NDT MT MPI Pressure Vessel - MPI is an important method for detecting surface defects, MT operations, The surface magnetic field strength, Magnetic testing is highly accurate, There are many magnetizing methods.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.jsc-safe.com\/?p=1326#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jsc-safe.com\/?p=1326\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.jsc-safe.com\/?p=1326#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.jsc-safe.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.jsc-safe.com\/#website\",\"url\":\"https:\/\/www.jsc-safe.com\/\",\"name\":\"JSC SAFE\",\"description\":\"Engineering & Fabrication- PM, NDT, QAQC, TPI\",\"publisher\":{\"@id\":\"https:\/\/www.jsc-safe.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.jsc-safe.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.jsc-safe.com\/#organization\",\"name\":\"JSC SAFE\",\"url\":\"https:\/\/www.jsc-safe.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.jsc-safe.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/mlwbeysh49ih.i.optimole.com\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/www.jsc-safe.com\/wp-content\/uploads\/2024\/03\/cropped-JSC_LOGO_2022-removebg-preview.png\",\"contentUrl\":\"https:\/\/mlwbeysh49ih.i.optimole.com\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/www.jsc-safe.com\/wp-content\/uploads\/2024\/03\/cropped-JSC_LOGO_2022-removebg-preview.png\",\"width\":500,\"height\":200,\"caption\":\"JSC SAFE\"},\"image\":{\"@id\":\"https:\/\/www.jsc-safe.com\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/profile.php?id=100006428552877\",\"https:\/\/www.linkedin.com\/in\/kenneth-ren-0bbb04102\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.jsc-safe.com\/#\/schema\/person\/475b6cef7eaf4f9c1b6874d5d6504377\",\"name\":\"jscadmin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.jsc-safe.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/72254946e33ae8216c269d336f048b53b16f028f438c7b85bef9fa549fbf4e2a?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/72254946e33ae8216c269d336f048b53b16f028f438c7b85bef9fa549fbf4e2a?s=96&d=mm&r=g\",\"caption\":\"jscadmin\"},\"url\":\"https:\/\/www.jsc-safe.com\/?author=2\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"NDT - Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel","description":"NDT MT MPI Pressure Vessel - MPI is an important method for detecting surface defects, MT operations, The surface magnetic field strength, Magnetic testing is highly accurate, There are many magnetizing methods.","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:\/\/www.jsc-safe.com\/?p=1326","og_locale":"en_US","og_type":"article","og_title":"NDT - Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel","og_description":"NDT MT MPI Pressure Vessel - MPI is an important method for detecting surface defects, MT operations, The surface magnetic field strength, Magnetic testing is highly accurate, There are many magnetizing methods.","og_url":"https:\/\/www.jsc-safe.com\/?p=1326","og_site_name":"JSC SAFE","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=100006428552877","article_published_time":"2024-04-15T07:38:54+00:00","article_modified_time":"2024-05-13T07:32:54+00:00","og_image":[{"url":"https:\/\/mlwbeysh49ih.i.optimole.com\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/www.jsc-safe.com\/wp-content\/uploads\/2024\/04\/NDT-MT-MPI-Pressure-Vessel.png"}],"author":"jscadmin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"jscadmin","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.jsc-safe.com\/?p=1326#article","isPartOf":{"@id":"https:\/\/www.jsc-safe.com\/?p=1326"},"author":{"name":"jscadmin","@id":"https:\/\/www.jsc-safe.com\/#\/schema\/person\/475b6cef7eaf4f9c1b6874d5d6504377"},"headline":"NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel","datePublished":"2024-04-15T07:38:54+00:00","dateModified":"2024-05-13T07:32:54+00:00","mainEntityOfPage":{"@id":"https:\/\/www.jsc-safe.com\/?p=1326"},"wordCount":415,"commentCount":0,"publisher":{"@id":"https:\/\/www.jsc-safe.com\/#organization"},"keywords":["Magnetic testing","MT","Pressure vessel"],"articleSection":["NDT"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.jsc-safe.com\/?p=1326#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.jsc-safe.com\/?p=1326","url":"https:\/\/www.jsc-safe.com\/?p=1326","name":"NDT - Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel","isPartOf":{"@id":"https:\/\/www.jsc-safe.com\/#website"},"datePublished":"2024-04-15T07:38:54+00:00","dateModified":"2024-05-13T07:32:54+00:00","description":"NDT MT MPI Pressure Vessel - MPI is an important method for detecting surface defects, MT operations, The surface magnetic field strength, Magnetic testing is highly accurate, There are many magnetizing methods.","breadcrumb":{"@id":"https:\/\/www.jsc-safe.com\/?p=1326#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.jsc-safe.com\/?p=1326"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.jsc-safe.com\/?p=1326#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.jsc-safe.com\/"},{"@type":"ListItem","position":2,"name":"NDT – Magnetic Testing (MT) \/ Magnetic Particle Inspection (MPI) for Pressure Vessel"}]},{"@type":"WebSite","@id":"https:\/\/www.jsc-safe.com\/#website","url":"https:\/\/www.jsc-safe.com\/","name":"JSC SAFE","description":"Engineering & Fabrication- PM, NDT, QAQC, TPI","publisher":{"@id":"https:\/\/www.jsc-safe.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.jsc-safe.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.jsc-safe.com\/#organization","name":"JSC SAFE","url":"https:\/\/www.jsc-safe.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.jsc-safe.com\/#\/schema\/logo\/image\/","url":"https:\/\/mlwbeysh49ih.i.optimole.com\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/www.jsc-safe.com\/wp-content\/uploads\/2024\/03\/cropped-JSC_LOGO_2022-removebg-preview.png","contentUrl":"https:\/\/mlwbeysh49ih.i.optimole.com\/w:auto\/h:auto\/q:mauto\/ig:avif\/https:\/\/www.jsc-safe.com\/wp-content\/uploads\/2024\/03\/cropped-JSC_LOGO_2022-removebg-preview.png","width":500,"height":200,"caption":"JSC SAFE"},"image":{"@id":"https:\/\/www.jsc-safe.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=100006428552877","https:\/\/www.linkedin.com\/in\/kenneth-ren-0bbb04102\/"]},{"@type":"Person","@id":"https:\/\/www.jsc-safe.com\/#\/schema\/person\/475b6cef7eaf4f9c1b6874d5d6504377","name":"jscadmin","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.jsc-safe.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/72254946e33ae8216c269d336f048b53b16f028f438c7b85bef9fa549fbf4e2a?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/72254946e33ae8216c269d336f048b53b16f028f438c7b85bef9fa549fbf4e2a?s=96&d=mm&r=g","caption":"jscadmin"},"url":"https:\/\/www.jsc-safe.com\/?author=2"}]}},"_links":{"self":[{"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=\/wp\/v2\/posts\/1326","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1326"}],"version-history":[{"count":12,"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=\/wp\/v2\/posts\/1326\/revisions"}],"predecessor-version":[{"id":1879,"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=\/wp\/v2\/posts\/1326\/revisions\/1879"}],"wp:attachment":[{"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jsc-safe.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}