{"id":4319,"date":"2025-06-04T07:39:20","date_gmt":"2025-06-04T07:39:20","guid":{"rendered":"https:\/\/www.wldsteel.com\/?p=4319"},"modified":"2025-06-04T07:39:21","modified_gmt":"2025-06-04T07:39:21","slug":"inspection-standards-for-fbe-anticorrosive-coatings","status":"publish","type":"post","link":"https:\/\/www.wldsteel.com\/fr\/inspection-standards-for-fbe-anticorrosive-coatings\/","title":{"rendered":"Inspection Standards for FBE Anticorrosive Coatings"},"content":{"rendered":"

FBE (Fusion-Bonded Epoxy) anticorrosive coating inspection standards encompass international, national, and industry specifications, focusing primarily on coating performance parameters and acceptance requirements. Below is a detailed overview of the core standard systems and key technical indicators:<\/p>\n\n\n\n

I. International Standard System<\/strong><\/strong><\/h3>\n\n\n\n
  1. ISO 21809 Series<\/strong>
    1. ISO 21809-1:2018<\/strong>: Specifies that the FBE primer layer thickness in 3-layer polyethylene (3LPE)\/polypropylene (3LPP) coatings shall be \u2265300\u03bcm, with adhesion \u22655MPa.<\/li><\/ol>
      1. ISO 21809-11:2019<\/strong>: Requires field joint and repair coatings to match the original coating thickness and pass the cathodic disbondment test (65\u00b0C, 28 days) with a disbondment distance \u226410mm .<\/li><\/ol>
        1. ISO 12944-6<\/strong>: Salt spray testing (ISO 9227) mandates that FBE coatings withstand 1,000 hours of testing without blistering or rusting .<\/li><\/ol><\/li>
        2. ASTM Standards<\/strong>
          1. ASTM D4541-22<\/strong>: Adhesion testing requires a pull-off strength \u22655MPa and a loading rate of 0.8MPa\/s \u00b110% .<\/li><\/ol>
            1. ASTM G42-11<\/strong>: High-temperature cathodic disbondment testing (80\u00b0C, 0.5MPa) allows a maximum disbondment distance of \u226415mm .<\/li><\/ol>
              1. ASTM A 775\/A 775M<\/strong>: General standard for epoxy coatings, specifying requirements for coating thickness, adhesion, and continuity.<\/li><\/ol><\/li>
              2. NACE SP0169-2024<\/strong>
                1. Coating insulation resistance \u226510,000\u03a9\u00b7m\u00b2, with a cathodic protection potential \u2264-0.85V (vs CSE) .<\/li><\/ol><\/li><\/ol>\n\n\n\n

                  II. Chinese National Standards<\/strong><\/strong><\/h3>\n\n\n\n
                  1. GB\/T 39636-2020<\/strong> (Core Standard)
                    1. \u00c9paisseur<\/strong>: Single-layer FBE: 350\u03bcm \u00b150\u03bcm; double-layer FBE: total thickness \u2265600\u03bcm, with local minimum thickness \u226580% of the design value.<\/li><\/ol>
                      1. Adhesion<\/strong>: Pull-off strength \u22655MPa; cross-cut method grade \u22652 (GB\/T 9286-2021) .<\/li><\/ol>
                        1. Cathodic Disbondment<\/strong>: Disbondment distance \u226415mm after testing at 65\u00b0C for 28 days .<\/li><\/ol><\/li>
                        2. GB\/T 4956-2003<\/strong>
                          1. Thickness measurement accuracy for magnetic substrates: \u00b110\u03bcm, with at least 3 measurements per square meter .<\/li><\/ol><\/li>
                          2. GB\/T 5210-2006<\/strong>
                            1. Pull-off test requires a specimen diameter of 20mm \u00b10.5mm and surface preparation to Sa2.5 grade.<\/li><\/ol><\/li><\/ol>\n\n\n\n

                              III. Industry Standards<\/strong><\/strong><\/h3>\n\n\n\n
                              1. SY\/T 4113.11-2023<\/strong> (Replacing SY\/T 0063-1999)
                                1. Holiday Detection<\/strong>: High-voltage spark testing voltage calculated as  V = 7900\\sqrt{T}  (T = thickness in mm), with a typical value of 2.1kV (0.4mm thickness) and a holiday density \u22642 defects\/m\u00b2 .<\/li><\/ol>
                                  1. Low-Voltage Detection<\/strong>: DC voltage \u2264100V, used to detect thickness deficiencies .<\/li><\/ol><\/li>
                                  2. SY\/T 0315-97<\/strong>
                                    1. Double-layer FBE total thickness \u2265600\u03bcm, requiring passage of a 1.5J impact test and 3\u00b0 bend test without disbondment .<\/li><\/ol><\/li>
                                    2. SY\/T 7036-2016<\/strong>
                                      1. Compatibility requirements for coatings and cathodic protection in oil and gas station pipelines: current density \u226410\u03bcA\/cm\u00b2 .<\/li><\/ol><\/li><\/ol>\n\n\n\n

                                        IV. Special Scenario Standard Requirements<\/strong><\/strong><\/h3>\n\n\n\n
                                        1. High-Temperature Environments<\/strong>
                                          1. Hot oil pipelines must pass the ASTM G42 test (80\u00b0C, 0.5MPa) with a disbondment distance \u226415mm .<\/li><\/ol>
                                            1. Glass transition temperature (Tg) must exceed 80\u00b0C, verified via DSC testing.<\/li><\/ol><\/li>
                                            2. Buried Pipelines<\/strong>
                                              1. Coating insulation resistance \u226510,000\u03a9\u00b7m\u00b2, with a cathodic protection potential \u2264-0.85V (vs CSE).<\/li><\/ol>
                                                1. Combined with Close Interval Potential Survey (CIPS) to assess defect distribution.<\/li><\/ol><\/li>
                                                2. Repair Projects<\/strong>
                                                  1. Repaired areas must meet thickness, adhesion, and holiday detection requirements, with interface bond strength \u22654MPa.<\/li><\/ol><\/li><\/ol>\n\n\n\n

                                                    V. Surface Preparation and Calibration Specifications<\/strong><\/strong><\/h3>\n\n\n\n
                                                    1. Surface Preparation Standards<\/strong>
                                                      1. Sandblasting cleanliness grade must reach Sa2.5 (GB\/T 8923.1) or SSPC-SP 10 (near-white grade).<\/li><\/ol><\/li>
                                                      2. Equipment Calibration<\/strong>
                                                        1. Thickness Gauges<\/strong>: Calibrated using standard test blocks (e.g., 350\u03bcm \u00b15\u03bcm), with an error \u2264\u00b15%.<\/li><\/ol>
                                                          1. Spark Testers<\/strong>: Verified daily using calibration plates with artificial defects, ensuring voltage error \u2264\u00b12%.<\/li><\/ol><\/li>
                                                          2. Reporting Requirements<\/strong>
                                                            1. Test data must include location, equipment model, calibration records, and bear CMA\/CNAS accreditation stamps.<\/li><\/ol><\/li><\/ol>\n\n\n\n

                                                              Through this standard system, the thickness, adhesion, corrosion resistance, and compatibility with cathodic protection of FBE anticorrosive coatings can be comprehensively evaluated, ensuring long-term reliability in oil & gas, chemical, and other industrial applications.<\/p>\n\n\n\n

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

                                                              FBE (Fusion-Bonded Epoxy) anticorrosive coating inspection standards encompass international, national, and industry specifications, focusing primarily on coating performance parameters and acceptance requirements. Below is a detailed overview of the core standard systems and key technical indicators: I. International Standard System ISO 21809 Series ISO 21809-1:2018: Specifies that the FBE primer layer thickness in 3-layer polyethylene […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"yoast_head":"\nInspection Standards for FBE Anticorrosive Coatings - API steel oilfield pipeline, casing pipe, OCTG manufacturer and supplier<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wldsteel.com\/fr\/inspection-standards-for-fbe-anticorrosive-coatings\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inspection Standards for FBE Anticorrosive Coatings - API steel oilfield pipeline, casing pipe, OCTG manufacturer and supplier\" \/>\n<meta property=\"og:description\" content=\"FBE (Fusion-Bonded Epoxy) anticorrosive coating inspection standards encompass international, national, and industry specifications, focusing primarily on coating performance parameters and acceptance requirements. 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