{"id":19364,"date":"2025-04-22T07:27:41","date_gmt":"2025-04-22T07:27:41","guid":{"rendered":"https:\/\/janhenvalve.com\/?p=19364"},"modified":"2025-07-07T04:02:20","modified_gmt":"2025-07-07T04:02:20","slug":"en-valve","status":"publish","type":"post","link":"https:\/\/janhenvalve.com\/ko_kr\/en-valve\/","title":{"rendered":"Comprehensive Analysis of EN Valve Standards: A Core Guide to European Technical Regulations"},"content":{"rendered":"<h1><span style=\"font-weight: 400;\">What is EN standard, technical code of EN valve standard<\/span><\/h1>\n<h1><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-19458 aligncenter\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/27b8b5dec490d39a5296699e96553fb.jpg\" alt=\"European Norm\uff08EN\uff09\" width=\"520\" height=\"345\" \/><\/span><\/h1>\n<p><span style=\"font-weight: 400;\">EN standards, full name<\/span> <b>European<\/b> <span style=\"font-weight: 400;\">Norm, are unified technical specifications formulated by authoritative organizations such as the European Committee for Standardization (CEN) and the European Committee for Electrotechnical Standardization (CENELEC). The birth of these standards stems from the needs of the European integration process &#8211; to promote the free flow of goods, services and personnel within the EU by eliminating technical barriers between European member states. EN standards not only cover traditional industrial fields (such as machinery manufacturing and construction engineering), but also involve emerging technologies (such as renewable energy and digital security). In<\/span> <span style=\"font-weight: 400;\">the field of valves, EN standards define the full process requirements of materials, design, testing, etc., and their legal effect is equivalent to the national standards in EU member states.<\/span> <span style=\"font-weight: 400;\">Its formulation process emphasizes the balance of interests of multiple parties, and enterprises, governments, and consumer organizations participate together to ensure the scientificity and universality of the standards.<\/span><\/p>\n<h3><b>The legal status of EN standards: the boundary between mandatory and voluntary<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">In the EU market, the legal effect of EN standards depends on whether they are referenced by EU directives.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-19463\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/685e934e2cc12d6bcacc731ed709ff2-scaled.png\" alt=\"EN valve standards\" width=\"833\" height=\"468\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/685e934e2cc12d6bcacc731ed709ff2-scaled.png 2560w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/685e934e2cc12d6bcacc731ed709ff2-768x432.png 768w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/685e934e2cc12d6bcacc731ed709ff2-1536x864.png 1536w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/685e934e2cc12d6bcacc731ed709ff2-2048x1152.png 2048w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">For example:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Mandatory compliance<\/b> <span style=\"font-weight: 400;\">: CE certification is the &#8220;passport&#8221; to enter the EU market, and the core of CE certification is to comply with relevant EN standards. Taking the Machinery Directive (2006\/42\/EC) as an example, companies must meet<\/span> <b>EN ISO 12100<\/b> <span style=\"font-weight: 400;\">(General Principles for Machinery Safety) before they can mark the CE mark on their products.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Recommended standards<\/b> <span style=\"font-weight: 400;\">: EN standards that are not referenced in directives (such as EN 10204 material inspection documents) are not mandatory, but are generally regarded as best practices by the industry. Following these standards can significantly improve supply chain trust and reduce the risk of trade disputes.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">For member states, EN standards have priority. For example, after the German national standard (DIN) is converted into an EN standard, the original DIN standard is abolished, ensuring a high degree of uniformity in European technical specifications.<\/span><\/p>\n<h1><span style=\"font-weight: 400;\">Overview of EN valve core standards<\/span><\/h1>\n<table>\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><b>\u200b\u200bStandard Number\u200b\u200b<\/b><\/td>\n<td style=\"text-align: center;\"><b>\u200b\u200bCore Requirements\u200b\u200b<\/b><\/td>\n<td style=\"text-align: center;\"><b>\u200b\u200bTypical application scenarios\u200b\u200b<\/b><\/td>\n<td style=\"text-align: center;\"><b>\u200b\u200bKey Parameters\/Differences\u200b\u200b<\/b><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 593\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Butterfly valve sealing grade, torque calculation, life test<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Chemical process control, water treatment system<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">L1 leakage rate \u2264 0.1% \u00d7 DN<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 12266-1\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Pressure test classification of valve housing and seals<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Oil platform, nuclear power plant safety valve<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Grade A: 1.5\u00d7PN pressure for 2 minutes<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 12516\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Valve body wall thickness calculation and strength verification method<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">High temperature and high pressure steam valve design<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Formula calculation error \u2264 \u00b13%<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 1984\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Limitation of chemical composition and mechanical properties of metal materials<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Acidic medium valve material selection, drinking water certification<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">316L stainless steel Cr content must be \u226516.5%<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 15634\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Material toughness requirements and assembly specifications for low temperature working conditions<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">LNG storage and transportation, liquid nitrogen delivery valve<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">-196\u2103 Impact energy \u226527J<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 1092-1\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Flange size, sealing surface accuracy, bolt hole positioning tolerance<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Pipeline connection design for EU projects<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">12% thicker than American standard flange<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN 15714-3\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Standardization of smart valve data interface protocol and diagnostic functions<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Digital factory, IoT remote monitoring system<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Supports OPC UA (EN 62541) communication<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><b>For more standards, please visit our in-depth interpretation guide:<\/b><a href=\"\/en-valve-standards\/\"><strong>\u300aPanoramic Analysis of EN Valve Standards: Technical Systems You Must Know for EU Market Acces\u300b<\/strong><\/a><\/p>\n<h1><span style=\"font-weight: 400;\">EN standard clauses that global valve buyers pay most attention to: &#8220;Technical codes&#8221; that must be checked in supply chain audits\u200b\u200b<\/span><\/h1>\n<p><span style=\"font-weight: 400;\">In international valve procurement, the purchaser&#8217;s engineering team often holds an &#8220;EN standard verification list&#8221; and these terms directly determine whether a supplier can be included in the shortlist.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19459\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/1dbc8957b82e53744a292ace4f962b5-scaled.png\" alt=\"EN valve standards\" width=\"2560\" height=\"1440\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/1dbc8957b82e53744a292ace4f962b5-scaled.png 2560w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/1dbc8957b82e53744a292ace4f962b5-768x432.png 768w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/1dbc8957b82e53744a292ace4f962b5-1536x864.png 1536w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/1dbc8957b82e53744a292ace4f962b5-2048x1152.png 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>\n<h3>The 7 high-profile clauses are the competitive barriers that manufacturers must prioritize\uff1a<\/h3>\n<ol>\n<li><span style=\"font-weight: 400;\"> EN 12266-1 \u00a76.2: Pressure test level (Class A\/Class B)\u200b\u200b<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Why is it worth paying attention to:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200bPurchasing industry\u200b\u200b: Petrochemical, nuclear power projects 100% require Class A testing<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200bKey parameters\u200b\u200b:<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Grade A: 1.5\u00d7PN (nominal pressure) for 2 minutes<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\">Grade B: 1.1\u00d7PN, hold pressure for 60 seconds<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">\u200b\u200bBuyer review focus:<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Require suppliers to provide time-stamped test videos (to prevent falsification of instantaneous peak pressure)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Verify pressure gauge calibration certificate for EN 837-1 Class 0.6 accuracy<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u200b\u200b2. EN 593 Table 4: Classification of allowable leakage rate of butterfly valves\u200b\u200b<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u200b\u200bBuyers\u2019 pain points:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The price difference between L1 (zero visible leakage) and L4 (allowing trace bubbles) is 35%<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Water treatment projects often require L2 level (\u22640.1\u00d7DN liters\/minute)<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Hidden risks:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Some suppliers passed the test at room temperature, but did not conduct a hot leak retest at 50\u00b0C according to EN 593 \u00a78.3<\/span><\/li>\n<\/ul>\n<p><b>\u200b\u200b3. EN 12516-3 formula: calculation of minimum valve body wall thickness\u200b\u200b<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Focus of the dispute:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Buyers often question whether the wall thickness allowance is too large (suspecting that the design is over-priced).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">EU factory inspection will review the original calculation parameters (such as the allowable stress value of the material)<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Factory inspection tips:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Require suppliers to demonstrate the operation process of EN 12516 calculation software on site (to prevent the use of outdated versions)<\/span><\/li>\n<\/ul>\n<p><b>\u200b\u200b4. EN 1984 \u00a76.2.3: Heavy metal limits for drinking water valves\u200b\u200b<\/b><\/p>\n<p><b>Hard indicators:<\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Lead content \u2264 0.25% (applicable to EN-GJS-400-18-LT ductile iron)<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"1\"><b>Nickel release \u2264 0.1 mg\/dm\u00b2 (EN 15664-1 test method)<\/b><\/li>\n<\/ul>\n<p><b>\u200b\u200bDetection blind area\u200b\u200b:<\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>It is necessary to send the material to a third-party laboratory (such as SGS) to verify the authenticity of the material certificate to prevent the supplier from tampering with the EN 10204 report.<\/b><\/li>\n<\/ul>\n<p><b>\u200b\u200b5. EN 15634 \u00a77.3: Low temperature impact energy requirements\u200b\u200b<\/b><\/p>\n<p><b>\u200b\u200bExtreme working condition threshold\u200b\u200b:<\/b><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>\uc628\ub3c4<\/b><\/td>\n<td><b>\uc7ac\ub8cc<\/b><\/td>\n<td><b>Impact energy requirements (Charpy V-notch)<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>-196\u2103<\/b><\/td>\n<td><b>X8Ni9<\/b><\/td>\n<td><b>\u226527J<\/b><\/td>\n<\/tr>\n<tr>\n<td><b>-50\u2103<\/b><\/td>\n<td><b>316L \uc2a4\ud14c\uc778\ub9ac\uc2a4 \uc2a4\ud2f8<\/b><\/td>\n<td><b>\u226534J<\/b><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><b>\u200b\u200bPurchasing trap\u200b\u200b: Some suppliers use liquid nitrogen rapid cooling instead of continuous low temperature environment, resulting in distortion of material toughness data<\/b><\/p>\n<p><b>\u200b\u200b6. EN 1092-1 Table 9: Flange sealing surface roughness\u200b\u200b<\/b><\/p>\n<p><b>\u200b\u200bConflict points in cross-border supply chains\u200b\u200b:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">EN standard requires Ra\u22643.2\u03bcm, and American standard ASME B16.5 allows Ra\u22646.3\u03bcm<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Mixing flanges will cause gasket failure (common in EPC general contracting projects)<\/span><\/li>\n<\/ul>\n<p><b>\u200b\u200bMain points of purchase contract:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It must be stated in the technical appendix that &#8220;the flange machining accuracy is in accordance with EN 1092-1, and no equivalent alternative standards are accepted&#8221;<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">\u200b\u200b7. EN 10204 3.1\/3.2: Material traceability levels\u200b\u200b<\/span><\/p>\n<p><b>Certificate Differences:<\/b><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Certificate Type<\/b><\/td>\n<td><b>Data Range<\/b><\/td>\n<td><b>Buyer acceptance<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">3.1<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Single batch chemical composition + mechanical properties<\/span><\/td>\n<td><span style=\"font-weight: 400;\">General for civil projects<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">3.2<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Third-party re-inspection report<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Mandatory requirements for nuclear power and military projects<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><b>Audit key: Check the EN standard version number on the certificate (e.g. EN 10204:2022 has replaced the 2013 version)<\/b><\/p>\n<h3><b>\u200b\u200b3 Hidden motivations for buyers to review EN standards\u200b\u200b<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200b<\/span><b>Risk transfer<\/b><span style=\"font-weight: 400;\">\u200b\u200b: Clearly define the boundaries of responsibility through EN clauses (e.g., if the valve bursts after specifying EN 12266-A level, the manufacturer will be fully responsible)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Cost prediction<\/b><span style=\"font-weight: 400;\">: Compare the technical parameters of different EN levels to accurately calculate the life cycle cost (e.g. L1 butterfly valve can reduce maintenance costs by 25%)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>\u200b\u200bCompliance audit\u200b\u200b<\/b><span style=\"font-weight: 400;\">: Meet the &#8220;supply chain standardization rate&#8221; indicator in the EU ESG report (suppliers using EN standards can add 10-15 points)<\/span><\/li>\n<\/ul>\n<h3><b>\u200b3 Major EN standard audit blind spots that buyers often ignore\u200b\u200b<\/b><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19464\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/8a119f8d7b3461ad056b9d5d91ff358-scaled.png\" alt=\"EN valve standards\" width=\"2560\" height=\"1440\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/8a119f8d7b3461ad056b9d5d91ff358-scaled.png 2560w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/8a119f8d7b3461ad056b9d5d91ff358-768x432.png 768w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/8a119f8d7b3461ad056b9d5d91ff358-1536x864.png 1536w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/8a119f8d7b3461ad056b9d5d91ff358-2048x1152.png 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>\n<p><b>\u200b\u200b1: Timeliness of standard version\u200b\u200b<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Fatal case<\/b><span style=\"font-weight: 400;\">: A project was ordered to modify the entire device because it used the EN 593:2012 version design (which has been abolished)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200b<\/span><b>Countermeasures<\/b><span style=\"font-weight: 400;\">\u200b\u200b:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Visit the CEN official website to verify the validity of the standard (e.g. the current version of EN 12266-1 is the 2022 version)<\/span><\/li>\n<\/ul>\n<p><b>\u200b\u200b2: Regional Specific Terms\u200b\u200b<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Special requirements for German projects<\/b><span style=\"font-weight: 400;\">:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">DIN EN standards often add localized clauses (e.g. DIN EN 1092-1 requires flange bolt hole chamfers to be 0.3mm)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>\u200b\u200bCountermeasures<\/b><span style=\"font-weight: 400;\">\u200b\u200b:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Specify the country of the project during the inquiry stage (e.g. Germany needs to meet the DIN additional clauses)<\/span><\/li>\n<\/ul>\n<p><b>\u200b\u200b3: Standard referential integrity\u200b\u200b<\/b><\/p>\n<ul>\n<li aria-level=\"1\"><b>Typical questions:<\/b><b><br \/>\n<\/b><b>The supplier only declares compliance with EN 12266, but does not specify the specific Part (such as Part 1 test standard\/Part 2 acceptance rules)<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"1\"><b>\u200b\u200bContract Specification Example\u200b\u200b:<\/b><b><br \/>\n<\/b><b>\u201cValves must meet EN 12266-1:2022 Class A test and EN 12266-2:2018 acceptance criteria\u201d<\/b><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">\u200b\u200bBuyers EN Standards Verification Toolkit\u200b\u200b<\/span><\/h3>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>EN Standard Quick Reference Manual\u200b\u200b<\/b><span style=\"font-weight: 400;\">:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Organize the core clauses of valve-related EN standards (such as EN 593 leakage rate table, EN 12516 formula)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Supplier Self-Inspection Form<\/b><span style=\"font-weight: 400;\">:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Require suppliers to check EN standard compliance item by item (with original test data page number attached)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Dispute Resolution Plan<\/b><span style=\"font-weight: 400;\">:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">It is stipulated in the contract: &#8220;The right to interpret EN standards shall be based on the original English version, excluding conflicts with local regulations&#8221;<\/span><\/li>\n<\/ol>\n<h1><span style=\"font-weight: 400;\">Why are EN standards more stringent? Material and safety factor &#8220;EU threshold&#8221;\u200b\u200b<\/span><\/h1>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19460\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29f2db20dd57c9223735b8c11c1b72a-scaled.png\" alt=\"EN valve\" width=\"2560\" height=\"1440\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29f2db20dd57c9223735b8c11c1b72a-scaled.png 2560w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29f2db20dd57c9223735b8c11c1b72a-768x432.png 768w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29f2db20dd57c9223735b8c11c1b72a-1536x864.png 1536w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29f2db20dd57c9223735b8c11c1b72a-2048x1152.png 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Compared with API and ISO systems, EN standards have established higher-level technical barriers in terms of material selection specifications and safety redundancy design, which is directly reflected in:<\/span><\/p>\n<h3><b>\u200b\u200bThe &#8220;double shackles&#8221; of material performance\u200b\u200b<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Precise control of chemical composition: EN 1984 has three times stricter limits on trace elements in cast valve materials than API 600 (e.g. lead content \u2264 0.25% vs API allows 0.35%)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200bExtreme working condition verification system\u200b\u200b: EN 15634 requires cryogenic valves to pass -196\u2103 continuous impact test, while ISO 28902 only requires -50\u2103 environmental verification<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200bCorrosion resistance throughout the life cycle\u200b\u200b: EN 12569 stipulates that acid medium valves must provide 10 years of accelerated corrosion test data, far exceeding the 5-year benchmark of ASME B16.34<\/span><\/li>\n<\/ul>\n<h3><b>\u200b\u200b &#8220;Mathematical Crushing&#8221; of Safety Factor\u200b\u200b<\/b><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Differences in wall thickness calculation formulas\u200b\u200b: EN 12516 uses the dynamic stress superposition method, which takes into account 15% more fatigue margin than the static formula of API 600<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200bRedundant design for burst pressure\u200b\u200b: EN 12266-1 requires that Class A valves withstand 1.5 times the PN pressure, while API 598 only tests 1.1 times the pressure<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u200b\u200bSeal failure prevention mechanism\u200b\u200b: EN 593 leakage rate classification sets the L1 standard as 0 leakage, which is more stringent than ISO 5208 AA level (allowing 0.001% leakage)<\/span><\/li>\n<\/ul>\n<h1><span style=\"font-weight: 400;\">The symbiotic relationship between CE certification and EN standards: the first step in valve export knowledge<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19456\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29ce3e85278981ca0d59147c08e2ccd.jpg\" alt=\"CE certification\" width=\"1312\" height=\"616\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29ce3e85278981ca0d59147c08e2ccd.jpg 1312w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/29ce3e85278981ca0d59147c08e2ccd-768x361.jpg 768w\" sizes=\"auto, (max-width: 1312px) 100vw, 1312px\" \/><\/span><\/h1>\n<p><span style=\"font-weight: 400;\">Simply put, CE certification is the legal threshold, and EN standards are the technical answers. When EU regulations require valves to be &#8220;safe and reliable&#8221;, EN standards translate it into specific numbers &#8211; such as bolt strength, leakage rate, material composition &#8211; and CE certification is to check whether these numbers meet the standards.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Key points:<\/span><\/p>\n<ul>\n<li aria-level=\"1\"><b>Legal binding:<\/b><b><br \/>\n<\/b><b>The legal basis for CE certification (such as the PED Directive) explicitly requires the use of EN standards for product verification, which means:<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"3\"><b>Products designed using non-EN standards (such as ASME\/API) cannot pass CE certification even if they have better performance<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"3\"><b>EU customs can directly seize CE certified products that do not meet EN standards<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"1\"><b>\u200b\u200bTechnical implementation\u200b\u200b:<\/b><b><br \/>\n<\/b><b>EN standards provide ready-made solutions for CE certification:<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"3\"><b>EN 12516 solves strength calculation problems<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"3\"><b>EN 12266 Specified Test Methods<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"3\"><b>EN 10204 ensures material traceability<\/b><\/li>\n<\/ul>\n<ul>\n<li aria-level=\"1\"><b>Timeliness trap\u200b\u200b:<\/b><b><br \/>\n<\/b><b>EN standards are updated every 5 years on average, and old CE certificates may become invalid (for example, after EN 593:2023 replaces the 2012 version from 2024, the original certificate will be immediately invalidated)<\/b><\/li>\n<\/ul>\n<p><b>Learn more about \u300aCE Certification Standards Guide\u300b<\/b><\/p>\n<h1><span style=\"font-weight: 400;\">The essential difference between EN standards and ISO and API standards\u200b\u200b<\/span><\/h1>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19466\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/895cbc763357a80b550343eee5232df.jpg\" alt=\"EN or ISO or API\" width=\"2048\" height=\"358\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/895cbc763357a80b550343eee5232df.jpg 2048w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/895cbc763357a80b550343eee5232df-768x134.jpg 768w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/895cbc763357a80b550343eee5232df-1536x269.jpg 1536w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Standard system<\/b><\/td>\n<td><b>Scope of application<\/b><\/td>\n<td style=\"text-align: center;\"><b>Legal effect<\/b><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Typical difference cases<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bEN\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">EU and EFTA countries<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Mandatory<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">EN 1092 flange thickness is 12% thicker than ASME B16.5 on average<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bISO\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Globally applicable<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Recommended (unless cited by EN)<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">EN ISO 10497 = ISO 10497 (fire test equivalent)<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bAPI\u200b\u200b<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Oil and Gas Industry<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Industry Practices<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">The calculation method of API 600 gate valve wall thickness is 5%-8% different from EN 12516<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400;\">Note: When exporting valves to the EU, even if API or ISO standards are met, EN standards must be implemented first.<\/span><\/p>\n<h3><b>EN vs API\/ISO: How do differences in design logic affect purchasing decisions? \u200b\u200b<\/b><\/h3>\n<table>\n<tbody>\n<tr>\n<td><b>Comparison Dimensions (European Market)<\/b><\/td>\n<td style=\"text-align: center;\"><b>EN standard design logic<\/b><\/td>\n<td style=\"text-align: center;\"><b>API\/ISO design logic<\/b><\/td>\n<td style=\"text-align: center;\"><b>Influence of purchasing decisions<\/b><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Material selection<\/span><\/td>\n<td style=\"text-align: left;\"><span style=\"font-weight: 400;\">Mandatory EU domestic material list (such as requiring EN 10088 stainless steel)<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Allows for global material equivalency substitution<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">The use of American standard materials requires re-EN certification<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Safety Factor<\/span><\/td>\n<td style=\"text-align: left;\"><span style=\"font-weight: 400;\">Dynamically adjust redundancy according to the EU Industrial Accident Database (e.g. the 2023 version of EN 12516 increases the safety factor of high temperature valves by 8%)<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Fixed coefficients based on historical experience<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">The EN version of the same valve model is 10-20% heavier than the API version<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">\u200b\u200bVerification cycle\u200b\u200b<\/span><\/td>\n<td style=\"text-align: left;\"><span style=\"font-weight: 400;\">Require third-party laboratories to conduct annual re-inspections (EN 10204:2022 adds blockchain evidence storage)<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Mainly self-inspection by enterprises<\/span><\/td>\n<td style=\"text-align: center;\"><span style=\"font-weight: 400;\">Procurement cycle extended by 15-30 days<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-weight: 400;\">\u200b\u200bNote to buyers\u200b\u200b: In EU EPC projects, even if the API valve performance meets the standards, if it does not meet the &#8220;preventive design concept&#8221; of the EN standard (such as not calculating the carbon footprint according to EN 17033), it will still be judged as a technical deviation item, resulting in the bid being rejected.<\/span><\/p>\n<h3><b>Synergy and Differences between EN and ISO Standards<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Many EN standards are directly equivalent to international standards (ISO), and are presented in a dual format of **&#8221;EN ISO**. For example:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>EN ISO 9001<\/b> <span style=\"font-weight: 400;\">: A global framework for quality management systems. Companies that pass this standard certification can not only meet EU CE requirements but also serve the international market.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>EN ISO 5208<\/b> <span style=\"font-weight: 400;\">: The golden standard for valve leakage rate testing, used by chemical and energy companies around the world to evaluate product sealing performance.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">However, EN standards are not a complete copy of ISO, and their differences are reflected in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Localized supplement<\/b> <span style=\"font-weight: 400;\">: EN standards may add European-specific technical requirements. For example,<\/span> <b>EN 1092-1<\/b> <span style=\"font-weight: 400;\">(flange standard) refines the performance requirements for commonly used materials in the EU (such as P265GH forged steel) based on ISO 7005.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Differences in compliance paths<\/b> <span style=\"font-weight: 400;\">: In some areas (such as medical devices), EN standards require testing by EU-designated laboratories, while ISO standards focus more on global applicability.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Learn more about &#8220;Must-read for purchasing<a href=\"\/valve-standards-iso-api-en\/\">\u300a Three major valve standards: ISO, API, EN\u2014Valve standards that global buyers must know\u300b<\/a><\/span><\/p>\n<h1><span style=\"font-weight: 400;\">Why are EN standards important?<\/span><\/h1>\n<p><span style=\"font-weight: 400;\">Whether you are a valve manufacturer, building contractor, or medical device supplier, understanding the core value of EN standards can make or break your business in markets like Europe where compliance with EN standards is required:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Market access<\/b> <span style=\"font-weight: 400;\">: CE certification relies on EN standards, and lack of compliance will directly lead to the product being rejected by the EU market.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Improved competitiveness<\/b> <span style=\"font-weight: 400;\">: Companies that follow EN standards are more likely to gain the trust of international customers, especially in industries with strict quality requirements (such as nuclear power and oil and gas).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Cost optimization<\/b> <span style=\"font-weight: 400;\">: Through the collaboration of EN and ISO standards, enterprises can reduce repeated testing and certification costs and achieve efficient resource allocation.<\/span><\/li>\n<\/ol>\n<p><b>As a valve manufacturer that has been deeply involved in EN standards for 20 years, JH has made every valve, every millimeter of wall thickness, every Newton of torque, and every material certificate withstand the rigorous scrutiny of EN standards. We are well aware that when every customer chooses a company that is proficient in EN standards, they are not only buying products, but also a set of quantifiable risk control solutions that can ensure safety. From the A-level test of EN 12266 to the carbon footprint tracking of EN 17033, these digital trust chains are becoming hard currency for global industrial procurement.<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19448\" src=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/822f6f573772360da7c11a538201fb9-scaled.jpg\" alt=\"JH \ubc38\ube0c \uc81c\uc870\uc5c5\uccb4\" width=\"2560\" height=\"1920\" srcset=\"https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/822f6f573772360da7c11a538201fb9-scaled.jpg 2560w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/822f6f573772360da7c11a538201fb9-768x576.jpg 768w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/822f6f573772360da7c11a538201fb9-1536x1152.jpg 1536w, https:\/\/janhenvalve.com\/wp-content\/uploads\/2025\/04\/822f6f573772360da7c11a538201fb9-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>What is EN standard, technical code of EN valve standard EN standards, full name European Norm, are unified technical specifications formulated by authoritative organizations such 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