{"id":3174,"date":"2026-06-24T16:13:03","date_gmt":"2026-06-24T14:13:03","guid":{"rendered":"https:\/\/www.technical-center.de\/wiki\/pmi-positive-material-identification-2\/"},"modified":"2026-06-24T16:13:03","modified_gmt":"2026-06-24T14:13:03","slug":"pmi-positive-material-identification-2","status":"publish","type":"encyclopedia","link":"https:\/\/www.technical-center.de\/en\/glossary\/pmi-positive-material-identification-2\/","title":{"rendered":"PMI (Positive Material Identification)"},"content":{"rendered":"<div class=\"glossar-eintrag\">\n<p><strong>Definition:<\/strong> Positive Material Identification (PMI) is the analytical verification of the chemical composition of a material for unambiguous material assignment. The aim is to prevent material mix-ups in safety-relevant applications. The test is carried out with minimal destruction directly on the component.<\/p>\n<p><strong>Practical relevance:<\/strong> PMI is used in particular in plant, pipeline and <a class=\"tc-inlink\" href=\"\/en\/materials-engineering\/materials-for-pressure-equipment\/\">pressure equipment<\/a> construction. Typical methods are mobile X-ray fluorescence analysis (XRF) or optical emission spectroscopy (OES). The alloying elements are checked in accordance with the material specification (e.g. EN 10025, ASTM). Incorrect assignments can lead to <a class=\"tc-inlink\" href=\"\/en\/corrosion-consulting-and-testing\/\">corrosion<\/a> or <a class=\"tc-inlink\" href=\"\/en\/research-special-testing\/hydrogen-resistance-htha-plant-engineering\/\">HTHA<\/a> damage.<\/p>\n<p><strong>Decision-making perspectives:<\/strong><\/p>\n<ul>\n<li><strong>Technical decision-makers:<\/strong> Ensuring correct material use in plants critical to media or temperature.<\/li>\n<li><strong>Purchasing\/project management:<\/strong> Requirement for documented PMI test reports at goods receipt or installation.<\/li>\n<li><strong>Science:<\/strong> Assessment of the analytical accuracy and detection limits of the methods used.<\/li>\n<li><strong>Insurance\/law:<\/strong> Documented material verification to safeguard against liability.<\/li>\n<\/ul>\n<p><strong>Typical testing or verification methods:<\/strong> Mobile XRF, spark OES, comparison with test certificates in accordance with EN 10204.<\/p>\n<p><strong>FAQ:<\/strong><\/p>\n<ul>\n<li>Why is PMI important in plant construction?<\/li>\n<li>Material mix-ups can lead to serious corrosion or safety problems and must be ruled out.<\/li>\n<\/ul>\n<\/div>\n","protected":false},"author":0,"featured_media":0,"template":"","encyclopedia-tag":[],"class_list":["post-3174","encyclopedia","type-encyclopedia","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia\/3174","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/types\/encyclopedia"}],"wp:attachment":[{"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/media?parent=3174"}],"wp:term":[{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.technical-center.de\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=3174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}