{"id":58231,"date":"2026-03-11T03:25:17","date_gmt":"2026-03-11T03:25:17","guid":{"rendered":"https:\/\/www.kaysuns.com\/?post_type=blog&#038;p=58231"},"modified":"2026-03-11T03:25:19","modified_gmt":"2026-03-11T03:25:19","slug":"padroes-de-flange-da-ue-en-13445-vs-en-1759","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/eu-flange-standards-en-13445-vs-en-1759\/","title":{"rendered":"An\u00e1lise das normas de flange da UE: aplica\u00e7\u00e3o e compara\u00e7\u00e3o das normas EN 13445 e EN 1759"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"58231\" class=\"elementor elementor-58231\" data-elementor-post-type=\"blog\">\n\t\t\t\t<div class=\"elementor-element elementor-element-84157db e-flex e-con-boxed e-con e-parent\" data-id=\"84157db\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1a30a52 elementor-widget elementor-widget-heading\" data-id=\"1a30a52\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Overview of EU Flange Standards | EN 13445 | EN 1759 | etc.<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ece9eb1 e-con-full e-flex e-con e-child\" data-id=\"ece9eb1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2906ea7 e-con-full e-flex e-con e-child\" data-id=\"2906ea7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bf33e8e elementor-widget elementor-widget-text-editor\" data-id=\"bf33e8e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tThe EU&#8217;s flange standards extend beyond EN 13445 and EN 1759 to include EN 1092,which is essentially equivalent to ASME B16.5.Currently,major EU corporations widely endorse the EN 13445 standard.Particularly when equipment is exported to Europe or the owner is a large EU enterprise,design compliance with EN 13445 is typically required.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57a2f42 elementor-widget elementor-widget-text-editor\" data-id=\"57a2f42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tRegarding flange standards,EN 1092 is sometimes adopted,while ASME B16.5 is directly specified in other instances.However,both ASME BPVC and EN 13445 standards carry certain regional limitations,potentially restricting their acceptance.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-357dbf2 e-con-full e-flex e-con e-child\" data-id=\"357dbf2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-45b55b3 elementor-widget elementor-widget-image\" data-id=\"45b55b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"766\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2026\/03\/EU-Standard-Flange-Packaging-Unit-1024x766.webp\" class=\"attachment-large size-large wp-image-58246\" alt=\"EU Standard Flange Packaging Unit\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2026\/03\/EU-Standard-Flange-Packaging-Unit-1024x766.webp 1024w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2026\/03\/EU-Standard-Flange-Packaging-Unit-1536x1149.webp 1536w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2026\/03\/EU-Standard-Flange-Packaging-Unit-2048x1532.webp 2048w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2026\/03\/EU-Standard-Flange-Packaging-Unit-scaled-e1773197072675-15x12.webp 15w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ac2d658 elementor-widget elementor-widget-text-editor\" data-id=\"ac2d658\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tFurthermore,even if alternative standards are agreed upon,approval from AI\/NOBO is required.For standard steel or nickel-based pipe flanges,it is impractical to perform non-standard calculations for each one,and even if attempted,such calculations may not be approved.Currently,standards like EN 13445-3\/6\/8\/10 only directly reference EN 1092-1.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7023b67 elementor-widget elementor-widget-heading\" data-id=\"7023b67\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">EN 13445 Gasket Strength<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c32e9dc elementor-widget elementor-widget-text-editor\" data-id=\"c32e9dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tHowever,it is noteworthy that the flange and gasket matching table in EN 13445-3 explicitly lists CLASS grades,indicating that European steel flanges also fall under the CLASS classification (though the main text of EN 13445 does not explicitly state this).Furthermore,the application examples in CEN\/TR 13445-101 explicitly reference EN 1759-1.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8828764 elementor-widget elementor-widget-text-editor\" data-id=\"8828764\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>PN<br \/>designated series<\/th>\n<th>Class<br \/>designated series<\/th>\n<th>Gasket type<\/th>\n<th>Minimum bolt strength category required<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">2,5 to 16<\/td>\n<td>&#8211;<\/td>\n<td>Non-metallic flat gasket with or without jacket<\/td>\n<td>Low strength<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\" rowspan=\"2\">25<\/td>\n<td rowspan=\"2\">150<\/td>\n<td>Non-metallic flat gasket with or without jacket<\/td>\n<td>Low strength<\/td>\n<\/tr>\n<tr>\n<td>Spiral-wound metal with filler<br \/>Corrugated metal jacketed with filler<br \/>Corrugated metal with or without filler<\/td>\n<td>Medium strength<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\" rowspan=\"3\">40<\/td>\n<td rowspan=\"3\">&#8211;<\/td>\n<td>Non-metallic flat gasket with or without jacket<\/td>\n<td>Low strength<\/td>\n<\/tr>\n<tr>\n<td>Spiral-wound metal with filler<br \/>Corrugated metal jacketed with filler<br \/>Corrugated metal with or without filler<\/td>\n<td>Medium strength<\/td>\n<\/tr>\n<tr>\n<td>Flat metal jacketed with filler<br \/>Grooved or solid flat metal<\/td>\n<td>High strength<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\" rowspan=\"3\">63<\/td>\n<td rowspan=\"3\">300<\/td>\n<td>Non-metallic flat gasket with or without jacket<\/td>\n<td>Low strength<\/td>\n<\/tr>\n<tr>\n<td>Spiral-wound metal with filler<br \/>Corrugated metal jacketed with filler<br \/>Corrugated metal with or without filler<\/td>\n<td>Medium strength<\/td>\n<\/tr>\n<tr>\n<td>Flat metal jacketed with filler<br \/>Grooved or solid flat metal<br \/>Metal ring joint<\/td>\n<td>High strength<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\" rowspan=\"2\">100<\/td>\n<td rowspan=\"2\">600<\/td>\n<td>Non-metallic flat gasket with or without jacket<br \/>Spiral-wound metal with filler<br \/>Corrugated metal jacketed with filler<br \/>Corrugated metal with or without filler<\/td>\n<td>Medium strength<\/td>\n<\/tr>\n<tr>\n<td>Flat metal jacketed with filler<br \/>Grooved or solid flat metal<br \/>Metal ring joint<\/td>\n<td>High strength<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c1340c0 elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c1340c0\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6a76582\" data-id=\"6a76582\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c722323 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"c722323\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What We Do<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa8aa05 elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"aa8aa05\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Plate<\/li><li>Sheet<\/li><li>Forgings<\/li><li>Round Bar<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9d3a9e elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"e9d3a9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Flange<\/li><li>Pipes<\/li><li>Fittings<\/li><li>Customized<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-c59b2ae\" data-id=\"c59b2ae\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-70c08fa elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"70c08fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Contact Us For More Information\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-80c4c08 elementor-align-center elementor-mobile-align-center elementor-widget__width-initial elementor-widget elementor-widget-button\" data-id=\"80c4c08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\" target=\"_blank\" id=\"#241018\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact Us<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-89f54e6 e-flex e-con-boxed e-con e-parent\" data-id=\"89f54e6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d2f78ee elementor-widget elementor-widget-heading\" data-id=\"d2f78ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Table in Chapter 11 of EN 13445-3<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1c3ec35 elementor-widget elementor-widget-text-editor\" data-id=\"1c3ec35\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tIn Chapter 11 of EN 13445-3,we find a crucial table.This table details the matching relationships between flanges and gaskets,particularly the explicit correspondence of CLASS grades.This content further confirms that steel flanges in the European flange system indeed fall within the CLASS grade framework,even though the main text of EN 13445 does not explicitly state this. Furthermore,the application examples within CEN\/TR 13445-101 explicitly reference EN 1759-1,underscoring the latter standard&#8217;s critical importance in the European flange industry.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1c27a98 e-flex e-con-boxed e-con e-parent\" data-id=\"1c27a98\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e5139cf elementor-widget elementor-widget-text-editor\" data-id=\"e5139cf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr>\n<td>Material<\/td>\n<td>1.4362<\/td>\n<td>Design Temp.<\/td>\n<td>165\u2103 (329\u2109)<\/td>\n<td>Rp0.2 at T<\/td>\n<td>294Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\"><\/td>\n<td>Rp0.2 at RT<\/td>\n<td>400 Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\"><\/td>\n<td>Rm at RT<\/td>\n<td>600 Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\">Allowable stress f: min (Rm\/3, Rp0.2\/1.5)<\/td>\n<td>at 165\u2103<\/td>\n<td>196 Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\">Selected stress: min (0.7Rp0.2 at RT\/T,1.25f)<\/td>\n<td>at 165\u2103<\/td>\n<td>205.8 Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\">Class 300 Allowable Pressure:<br \/>min(300\u00d710\u00d7Ss\/8750, Table B1)<\/td>\n<td>at 165\u2103<\/td>\n<td>49.79 bar<br \/>4.979 Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"4\">Class 150 Allowable Pressure:<br \/>min(115\u00d710\u00d7Ss\/8750, Table B1, Pt)<\/td>\n<td>at 165\u2103<\/td>\n<td>49.79 bar<br \/>4.979 Mpa<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\"><\/td>\n<td>Pt=C2-C3T<\/td>\n<td>at 165\u2103<\/td>\n<td>15.27 bar<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eb69592 elementor-widget elementor-widget-text-editor\" data-id=\"eb69592\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>Symbol<\/th>\n<th>Class<\/th>\n<th>Cal. Press<\/th>\n<th>Allowable Press<\/th>\n<th>U%<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">M6<\/td>\n<td>300<\/td>\n<td>0.7031<\/td>\n<td>4.979<\/td>\n<td>14.12<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">M8<\/td>\n<td>300<\/td>\n<td>0.9002<\/td>\n<td>4.979<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">M10<\/td>\n<td>300<\/td>\n<td>1.0101<\/td>\n<td>4.979<\/td>\n<td>20.29<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0d8c024 e-flex e-con-boxed e-con e-parent\" data-id=\"0d8c024\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8616e14 elementor-widget elementor-widget-heading\" data-id=\"8616e14\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Application of EN 13445<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b80059f elementor-widget elementor-widget-text-editor\" data-id=\"b80059f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tCurrently,standards such as EN 13445-3\/6\/8\/10 only directly reference the EN 1092-1 standard.However,it is noteworthy that the flange and gasket matching table in EN 13445-3 explicitly lists CLASS grades,indicating that steel flanges in Europe also fall under the CLASS classification system.This content enhances the standard&#8217;s influence in Europe.Despite its regional limitations,it is widely accepted and exerts significant impact across the continent.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c253bb2 e-flex e-con-boxed e-con e-parent\" data-id=\"c253bb2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-239db56 elementor-widget elementor-widget-heading\" data-id=\"239db56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Comparison and Application of EN 1759<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0f3e0f elementor-widget elementor-widget-text-editor\" data-id=\"e0f3e0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tIf the flange standard specified in the conditions is ASME B16.5,it is recommended to switch to the EN 1759-1 standard to ensure design consistency.Using this standard simplifies the calculation of pipe flanges and is generally accepted by both AI and NOBO in most cases.However,EN 1759-1 also has limitations.The standard has not been updated since 2004,resulting in some newer material standards not being covered.Nevertheless,Appendix D of this standard provides a method for calculating the Maximum Allowable Working Pressure (MAWP) for European standard materials at specific design temperatures,partially addressing this deficiency.For MAWP issues involving new materials at design temperatures,this can be resolved by creating custom Excel spreadsheets.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element 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