{"id":7942,"date":"2026-07-24T11:44:48","date_gmt":"2026-07-24T08:44:48","guid":{"rendered":"https:\/\/axinar.com\/?p=7942"},"modified":"2026-07-24T11:44:48","modified_gmt":"2026-07-24T08:44:48","slug":"galvanized-steel-pipe-types-uses","status":"publish","type":"post","link":"https:\/\/axinar.com\/en\/blog\/galvanized-steel-pipe-types-uses","title":{"rendered":"Galvanized Steel Pipe: Types, Coating Thickness, Uses"},"content":{"rendered":"<p>Galvanized steel pipe is one of the most common, proven and standardized products in metal applications. Used in water supply networks, fire protection, compressed air, industrial piping, and structural constructions. Behind an apparently simple product lie many standards and options that determine if it will work properly in your application.<\/p>\n<h2>Types per DIN 2440 \/ EN 10255<\/h2>\n<h3>DIN 2440 (Older, still in use)<\/h3>\n<ul>\n<li><strong>Medium duty:<\/strong> Standard wall thickness for water supply\/gas up to 25 bar pressure<\/li>\n<li><strong>Diameters:<\/strong> \u00bd&#8221;, \u00be&#8221;, 1&#8243;, 1\u00bc&#8221;, 1\u00bd&#8221;, 2&#8243;, 2\u00bd&#8221;, 3&#8243;, 4&#8243;, 5&#8243;, 6&#8243;<\/li>\n<li><strong>Wall thickness:<\/strong> 2.3 to 5.4 mm depending on diameter<\/li>\n<\/ul>\n<h3>EN 10255 (Modern European standard)<\/h3>\n<p>Replaces DIN 2440. Divides pipes into three categories:<\/p>\n<ul>\n<li><strong>L (Light):<\/strong> Thin wall for general low-pressure use<\/li>\n<li><strong>M (Medium):<\/strong> Standard for water supply, gas, fire protection<\/li>\n<li><strong>H (Heavy):<\/strong> Increased wall for high pressures or structural applications<\/li>\n<\/ul>\n<h2>Zn Coating Thickness<\/h2>\n<p>Protection depends on galvanic layer thickness, typically:<\/p>\n<table>\n<thead>\n<tr>\n<th>Standard<\/th>\n<th>Zn thickness (interior)<\/th>\n<th>Zn thickness (exterior)<\/th>\n<th>Use<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DIN 2444 (light)<\/td>\n<td>70 g\/m\u00b2<\/td>\n<td>200 g\/m\u00b2<\/td>\n<td>General water supply<\/td>\n<\/tr>\n<tr>\n<td>EN 10255 Medium<\/td>\n<td>400 g\/m\u00b2 min<\/td>\n<td>400 g\/m\u00b2 min<\/td>\n<td>Fire protection, industrial<\/td>\n<\/tr>\n<tr>\n<td>EN 10240 A1<\/td>\n<td>500\u2013800 g\/m\u00b2<\/td>\n<td>500\u2013800 g\/m\u00b2<\/td>\n<td>High-corrosion zones<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>Note:<\/em> 1 g\/m\u00b2 Zn \u2248 0.14 \u03bcm coating thickness.<\/p>\n<h2>Uses<\/h2>\n<h3>Fire Protection Networks<\/h3>\n<p>Mandatorily galvanized pipes per NFPA 13 (and Greek PD 71\/1988). Interior Zn protects from stagnant water, fire protection networks are stagnant 99% of the time, where non-galvanized pipe would quickly rust.<\/p>\n<h3>Outdoor Water Supply &amp; Irrigation<\/h3>\n<p>Irrigation networks in farms, outdoor building networks. Galvanized pipe withstands frost and UV radiation better than unprotected.<\/p>\n<h3>Compressed Air Networks<\/h3>\n<p>In factories and industrial units, galvanized pipe is the typical choice for compressed air systems. The advantage: interior Zn prevents oxidation from compressed air moisture.<\/p>\n<h3>Gas (Natural \/ LPG)<\/h3>\n<p>For surface installations (not underground), galvanized pipe is a common solution. EN 10255 is the applicable standard.<\/p>\n<h3>Structural Constructions<\/h3>\n<p>Guardrails, stairs, handrails, wrought iron, metal structure frames. Galvanized pipe replaces black pipe where paint is insufficient (outdoor).<\/p>\n<h3>HVAC &amp; Electrical Supports<\/h3>\n<p>Racks for outdoor AC units, lighting masts, cable trays in industrial installations.<\/p>\n<h2>When It&#8217;s NOT the Best Choice<\/h2>\n<ul>\n<li><strong>Potable water:<\/strong> In older installations with galvanized pipes for potable water, elements (Pb, Cd) may leach from old galvanizing. Modern practice: plastic pipes (PPR, PEX) or inox for potable water.<\/li>\n<li><strong>Heating:<\/strong> Temperatures above 60\u00b0C trigger electrochemical reactions, prefer copper or inox.<\/li>\n<li><strong>Underground installations:<\/strong> Galvanizing isn&#8217;t sufficient for serious soil exposure. Additional epoxy coating or replacement with HDPE is needed.<\/li>\n<li><strong>Chemical solutions:<\/strong> Zn is attacked by acidic and basic solutions. Inox 316L or special alloy is needed.<\/li>\n<\/ul>\n<h2>Comparison with Other Protective Methods<\/h2>\n<table>\n<thead>\n<tr>\n<th>Method<\/th>\n<th>Durability<\/th>\n<th>Cost<\/th>\n<th>Ideal Use<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hot-dip galvanizing<\/td>\n<td>25\u201375 years<\/td>\n<td>Medium<\/td>\n<td>Fire protection, industrial water, structural<\/td>\n<\/tr>\n<tr>\n<td>Electro-galvanizing<\/td>\n<td>3\u201310 years<\/td>\n<td>Low<\/td>\n<td>Interior, non-critical networks<\/td>\n<\/tr>\n<tr>\n<td>Epoxy coating<\/td>\n<td>15\u201330 years<\/td>\n<td>High<\/td>\n<td>Underground, chemical environments<\/td>\n<\/tr>\n<tr>\n<td>Cold galvanizing (paint)<\/td>\n<td>3\u20137 years<\/td>\n<td>Low<\/td>\n<td>Repair, local protection<\/td>\n<\/tr>\n<tr>\n<td>Inox 304\/316L<\/td>\n<td>50+ years<\/td>\n<td>Very high<\/td>\n<td>Potable water, food, chemicals<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Additional Standards and Certifications<\/h2>\n<ul>\n<li><strong>ASTM A53:<\/strong> Widely used American standard for welded and seamless steel pipes.<\/li>\n<li><strong>BS 1387:<\/strong> British standard for steel pipes suitable for welding and threading.<\/li>\n<li><strong>NSF:<\/strong> Certification for contact with potable water (lead-free). In modern practice, however, galvanized steel pipe is not recommended for indoor potable water piping.<\/li>\n<\/ul>\n<h2>Additional Applications<\/h2>\n<ul>\n<li><strong>Agricultural installations:<\/strong> Greenhouses (frame), animal shelters, outdoor irrigation systems.<\/li>\n<li><strong>HVAC:<\/strong> Ventilation ducts, refrigerant lines, outdoor unit supports.<\/li>\n<li><strong>Outdoor plumbing:<\/strong> Outdoor taps, downspouts, gray water lines.<\/li>\n<li><strong>Structural elements:<\/strong> Scaffolding, retaining walls, fences.<\/li>\n<\/ul>\n<h2>Underground Installations, Additional Protection<\/h2>\n<p>When galvanized pipe is placed underground, additional protection is needed:<\/p>\n<ul>\n<li>Wrapping with corrosion-resistant tape.<\/li>\n<li>Protection from aggressive soils (acidic or high salt content).<\/li>\n<li>Sealing cut edges so ungalvanized core is not exposed.<\/li>\n<\/ul>\n<p>Galvanizing alone is not sufficient for long-lasting underground use.<\/p>\n<div style=\"border:1px solid rgba(221,43,28,.28);border-radius:10px;padding:22px;margin:26px 0;background:rgba(255,255,255,.02);\">\n<div style=\"margin-bottom:14px;\">\n<div style=\"font-family:'Barlow Condensed', sans-serif;font-size:1.35rem;font-weight:700;line-height:1.15;margin-bottom:2px;color:#ffffff;\">AXINAR Pipe Galvanizing<\/div>\n<div style=\"opacity:.85;font-size:.92rem;color:#ffffff;\">EN 10255 \/ EN 10240 thicknesses per spec<\/div>\n<\/div>\n<div>\n<p style=\"margin:0 0 12px 0;line-height:1.55;color:#ffffff;\">AXINAR galvanizes pipes, fittings and whole products per EN 10255. For complete constructions (piping kits), we provide cutting, welding + galvanizing in one service.<\/p>\n<ul style=\"margin:0 0 14px 0;padding-left:20px;color:#ffffff;\">\n<li style=\"margin-bottom:6px;\">Galvanizing on complete pipes<\/li>\n<li style=\"margin-bottom:6px;\">Zn thickness 400+ g\/m\u00b2 for industrial<\/li>\n<li style=\"margin-bottom:6px;\">Certificates per batch<\/li>\n<\/ul>\n<p><a href=\"\/en\/metal-cutting\/metal-galvanizing\" style=\"display:inline-block !important;background:#dd2b1c !important;color:#ffffff !important;font-family:Barlow Condensed, sans-serif !important;font-size:.9rem !important;font-weight:700 !important;text-transform:uppercase !important;letter-spacing:1.2px !important;padding:10px 22px !important;border-radius:6px !important;text-decoration:none !important;margin-top:10px;\">See the service \u2192<\/a><\/div>\n<\/div>\n<h2>Request a Quote for Your Project<\/h2>\n<p>Send us sketches, CAD drawings, or a description of your project, and we&#8217;ll respond within 24 hours with a technical estimate. We cover everything from prototypes to mass OEM production.<\/p>\n<p><a href=\"\/en\/contact\" style=\"display:inline-block !important;background:#dd2b1c !important;color:#ffffff !important;font-family:Barlow Condensed, sans-serif !important;font-size:1rem !important;font-weight:700 !important;text-transform:uppercase !important;letter-spacing:1.5px !important;padding:12px 28px !important;border-radius:8px !important;text-decoration:none !important;margin-top:8px;\">Request quote \u2192<\/a><\/p>\n<hr>\n<p><em>See also <a href=\"\/en\/blog\/hot-vs-cold-galvanizing\">hot-dip vs cold galvanizing<\/a> or <a href=\"\/en\/blog\/industrial-hot-dip-galvanizing-applications\">industrial galvanizing applications<\/a>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Galvanized steel pipe is one of the most common, proven and standardized products in metal applications. Used in water supply [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":4959,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"rank_math_title":"Galvanized Steel Pipe: DIN 2440, EN 10255 | AXINAR","rank_math_description":"Galvanized steel pipe: DIN 2440 types (light\/medium\/heavy), Zn coating thicknesses, uses in fire protection, water supply, gas, structural. AXINAR guide.","footnotes":""},"categories":[176],"tags":[],"class_list":["post-7942","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/posts\/7942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/comments?post=7942"}],"version-history":[{"count":0,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/posts\/7942\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/media\/4959"}],"wp:attachment":[{"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/media?parent=7942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/categories?post=7942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/axinar.com\/en\/wp-json\/wp\/v2\/tags?post=7942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}