{"id":9198,"date":"2026-09-07T09:54:00","date_gmt":"2026-09-07T09:54:00","guid":{"rendered":"https:\/\/www.desopipe.com\/?p=9198"},"modified":"2026-10-09T02:40:32","modified_gmt":"2026-10-09T02:40:32","slug":"what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe","status":"publish","type":"post","link":"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/","title":{"rendered":"L\u1edbp Nh\u00f4m trong \u1ed0ng H\u1ee3p Kim Nh\u00f4m PPR c\u00f3 Ch\u1ee9c N\u0103ng G\u00ec?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Chuy\u1ec3n \u0111\u1ed5i m\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Chuy\u1ec3n \u0111\u1ed5i<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#Quick_answer\" >C\u00e2u tr\u1ea3 l\u1eddi nhanh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#How_Does_the_Aluminum_Layer_Act_as_an_Oxygen_Barrier\" >How Does the Aluminum Layer Act as an Oxygen Barrier?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#How_Does_the_Aluminum_Layer_Reduce_Thermal_Expansion\" >How Does the Aluminum Layer Reduce Thermal Expansion?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#How_Does_the_Aluminum_Layer_Improve_Rigidity_and_Dimensional_Stability\" >How Does the Aluminum Layer Improve Rigidity and Dimensional Stability?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#Aluminum_vs_Fiber-Reinforced_PPR_Which_Fits_Your_Project\" >Aluminum vs. Fiber-Reinforced PPR: Which Fits Your Project?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#How_Does_Aluminum_Layer_Thickness_Affect_Performance_Is_02_mm_Enough\" >How Does Aluminum Layer Thickness Affect Performance? Is 0.2 mm Enough?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#What_Should_You_Remember_About_the_Aluminum_Layer\" >What Should You Remember About the Aluminum Layer?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#FAQs\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#1_What_is_the_purpose_of_the_aluminum_layer_in_PPR_aluminum_composite_pipe\" >1. What is the purpose of the aluminum layer in PPR aluminum composite pipe?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#2_How_does_the_aluminum_layer_prevent_oxygen_permeation\" >2. How does the aluminum layer prevent oxygen permeation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#3_What_is_the_difference_between_PPR-AL-PPR_and_standard_PPR_pipe\" >3. What is the difference between PPR-AL-PPR and standard PPR pipe?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#4_How_thick_is_the_aluminum_layer_in_PPR_composite_pipe\" >4. How thick is the aluminum layer in PPR composite pipe?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/what-is-the-function-of-the-aluminum-layer-in-ppr-aluminum-composite-pipe\/#5_Does_the_aluminum_layer_affect_pipe_flexibility\" >5. Does the aluminum layer affect pipe flexibility?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Quick_answer\"><\/span><strong>C\u00e2u tr\u1ea3 l\u1eddi nhanh<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The PPR aluminum composite pipe aluminum layer limits oxygen diffusion, reduces thermal expansion, and improves dimensional stability. These properties are useful in hot-water and closed-loop heating systems. DESO combines PPR and aluminum in a three-layer pipe available in PN16 and PN20.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"600\" src=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3.webp\" alt=\"Infographic hi\u1ec3n th\u1ecb ch\u1ee9c n\u0103ng c\u1ee7a l\u1edbp nh\u00f4m trong \u1ed1ng h\u1ee3p kim nh\u00f4m PPR, minh h\u1ecda vi\u1ec7c ng\u0103n ch\u1eb7n khu\u1ebfch t\u00e1n oxy, gi\u1ea3m gi\u00e3n n\u1edf nhi\u1ec7t v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc.\" class=\"wp-image-9199\" srcset=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3.webp 1200w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-500x250.webp 500w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-300x150.webp 300w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-768x384.webp 768w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-18x9.webp 18w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-150x75.webp 150w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-480x240.webp 480w, https:\/\/www.desopipe.com\/wp-content\/uploads\/2026\/10\/image1-3-800x400.webp 800w\" sizes=\"auto, (max-width:767px) 480px, (max-width:1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_the_Aluminum_Layer_Act_as_an_Oxygen_Barrier\"><\/span><strong>How Does the Aluminum Layer Act as an Oxygen Barrier?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Oxygen is prevented from diffusing through the pipe wall when a continuous aluminum layer is part of the installation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rather than stopping the PPR from corroding, the barrier is there to limit oxygen ingress and help safeguard ferrous components present elsewhere in the system. These may include heat exchangers, pumps, boilers, and steel radiators, with the PPR already resisting electrochemical corrosion.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_the_Aluminum_Layer_Reduce_Thermal_Expansion\"><\/span><strong>How Does the Aluminum Layer Reduce Thermal Expansion?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.desopipe.com\/vi\/product\/standard-ppr-pipe\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ti\u00eau chu\u1ea9n PPR<\/a> expands and contracts with shifts in water temperature. Some of this movement can be restricted by adding a continuous aluminum layer, as aluminum tends to expand much less than unreinforced PPR.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The difference can be bigger than you\u2019d expect. DESO&#8217;s <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/product-use-cases\/ppr-pipes-in-hvac-efficiency-durability\/\" target=\"_blank\" rel=\"noreferrer noopener\">H\u1ec7 th\u1ed1ng HVAC <\/a>guidance gives a linear expansion coefficient of about 0.150 mm\/m\u00b7K for standard PP-R and 0.050 mm\/m\u00b7K for PPR-AL-PPR. To compare, the composite construction has about one-third of the thermal expansion of standard PP-R.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Less movement helps long hot-water runs stay aligned and reduces the amount of expansion the piping layout has to accommodate. Supports and expansion planning are still necessary. The aluminum layer does not make thermal movement disappear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_the_Aluminum_Layer_Improve_Rigidity_and_Dimensional_Stability\"><\/span><strong>How Does the Aluminum Layer Improve Rigidity and Dimensional Stability?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The aluminum layer also acts as a reinforcing framework inside the pipe wall. It makes the pipe more rigid and helps it maintain its shape as temperatures change.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That does not mean aluminum alone determines the pipe&#8217;s allowable pressure. Pressure performance depends on the complete construction, including wall dimensions, PPR material, temperature, and operating conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DESO&#8217;s PPR <a href=\"https:\/\/www.desopipe.com\/vi\/product\/ppr-aluminum-composite-pipe\/\" target=\"_blank\" rel=\"noreferrer noopener\">aluminum composite pipe<\/a> uses a three-layer PPR-aluminum-PPR design and is available in PN16 and PN20. Its published size range runs from 20 to 63 mm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Aluminum_vs_Fiber-Reinforced_PPR_Which_Fits_Your_Project\"><\/span><strong>Aluminum vs. Fiber-Reinforced PPR: Which Fits Your Project?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Both aluminum and fiber reinforcement can improve dimensional stability, but they do not perform exactly the same function.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DESO c\u1ee7a <a href=\"https:\/\/www.desopipe.com\/vi\/product\/ppr-fiber-composite-pipe\/\" target=\"_blank\" rel=\"noreferrer noopener\">fiber composite pipe<\/a> uses 20% glass-fiber reinforcement and is available from 20 to 160 mm across PN10 to PN20. It can be useful when the main goal is reducing temperature-related movement while retaining an all-polymer composite construction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aluminum adds something fiber reinforcement does not: a continuous barrier against oxygen diffusion through the pipe wall. That can make PPR pipe with aluminum particularly relevant for closed hydronic systems with oxygen-sensitive components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike a broad <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/ppr-pipe-vs-pvc\/\" target=\"_blank\" rel=\"noreferrer noopener\">PPR pipe vs PVC<\/a> comparison, choosing between these reinforced PPR types comes down to what the reinforcement needs to accomplish. Neither option is universally better.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_Aluminum_Layer_Thickness_Affect_Performance_Is_02_mm_Enough\"><\/span><strong>How Does Aluminum Layer Thickness Affect Performance? Is 0.2 mm Enough?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not necessarily. No universal rule states that a 0.2 mm aluminum layer is sufficient for all PPR aluminum composite pipes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In fact, aluminum thickness is just a single aspect of a multilayer design. You must also account for layer arrangement, pipe diameter, manufacturing method, bonding quality, and required performance. Although a PPR pipe standard may set dimensions or performance requirements, it doesn\u2019t mean that every standard requires the same aluminum thickness.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DESO publishes the dimensions and pressure classes of its aluminum composite pipe range but does not publicly specify a separate aluminum-foil thickness on its product page. It would therefore be misleading to assign a 0.2 mm requirement to DESO&#8217;s range.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A thicker aluminum layer does not automatically mean a better product either. Aluminum thickness alone does not determine PPR pipe lifespan. The complete construction, operating conditions, bonding quality, and installation all affect long-term performance.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  \n  <title>S\u1ea3n ph\u1ea9m n\u1ed5i b\u1eadt c\u1ee7a Hero<\/title>\n  <style>\n    .hero-card {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: Arial, sans-serif;\n      text-decoration: none;\n      color: inherit;\n font-family: 'Poppins';\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins',\n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #0066cc;\n      color: #fff;\n      text-decoration: none;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #004c99;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.desopipe.com\/vi\/product\/ppr-aluminum-composite-pipe\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/www.desopipe.com\/wp-content\/uploads\/2025\/02\/1.webp\" alt=\"\u1ed0ng Composite Nh\u00f4m DESO PPR\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">\u1ed0ng Composite Nh\u00f4m PPR<\/div>\n    <div class=\"hero-description\">\n\n\u1ed0ng nh\u00f4m composite Deso PPR k\u1ebft h\u1ee3p \u0111\u1ed9 b\u1ec1n c\u1ee7a PPR v\u1edbi \u0111\u1ed9 b\u1ec1n c\u1ee7a nh\u00f4m \u0111\u1ec3 mang l\u1ea1i hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i trong h\u1ec7 th\u1ed1ng n\u01b0\u1edbc n\u00f3ng v\u00e0 n\u01b0\u1edbc l\u1ea1nh. <\/div>\n    <span class=\"hero-link\">Xem s\u1ea3n ph\u1ea9m<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Should_You_Remember_About_the_Aluminum_Layer\"><\/span><strong>What Should You Remember About the Aluminum Layer?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Three useful jobs performed by the aluminum layer:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>It restrains thermal expansion<\/li>\n\n\n\n<li>It limits oxygen diffusion<\/li>\n\n\n\n<li>It increases dimensional stability<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Due to these benefits, aluminum-reinforced PPR comes in handy when PPR pipe plumbing requires additional expansion control or when an <a href=\"https:\/\/www.desopipe.com\/vi\/blog\/ppr-pipe\/oxygen-barrier-ppr-pipes-when-necessary\/\" target=\"_blank\" rel=\"noreferrer noopener\">r\u00e0o c\u1ea3n oxy<\/a> is required by a closed-loop system. Just remember the right construction depends on the job that the reinforcement needs to perform.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span><strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_What_is_the_purpose_of_the_aluminum_layer_in_PPR_aluminum_composite_pipe\"><\/span><strong>1. What is the purpose of the aluminum layer in PPR aluminum composite pipe?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It limits oxygen diffusion through the pipe wall, reduces thermal expansion, and increases rigidity and dimensional stability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_How_does_the_aluminum_layer_prevent_oxygen_permeation\"><\/span><strong>2. How does the aluminum layer prevent oxygen permeation?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A physical barrier is created by the continuous metal layer to prevent oxygen from diffusing through the pipe wall. Oxygen-barrier performance is expressed in terms of allowable permeability rather than the whole piping system being treated as impermeable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_What_is_the_difference_between_PPR-AL-PPR_and_standard_PPR_pipe\"><\/span><strong>3. What is the difference between PPR-AL-PPR and standard PPR pipe?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">PPR-AL-PPR adds an aluminum layer between PPR layers. Due to this reinforcement, thermal expansion is reduced and you gain an oxygen barrier along with improved dimensional stability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_How_thick_is_the_aluminum_layer_in_PPR_composite_pipe\"><\/span><strong>4. How thick is the aluminum layer in PPR composite pipe?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No single thickness applies to every product or diameter. Instead, the complete pipe design determines the required thickness, with specifications potentially varying between manufacturers.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Does_the_aluminum_layer_affect_pipe_flexibility\"><\/span><strong>5. Does the aluminum layer affect pipe flexibility?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Adding aluminum makes the pipe more rigid than an equivalent unreinforced plastic construction, which is part of how it limits temperature-related movement.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-fe48e5de wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.desopipe.com\/vi\/contact\/\" style=\"background-color:#0588a7\" target=\"_blank\" rel=\"noreferrer noopener\">Nh\u1eadn b\u00e1o gi\u00e1 mi\u1ec5n ph\u00ed<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Quick answer The PPR aluminum composite pipe aluminum layer limits oxygen diffusion, reduces thermal expansion, and improves dimensional stability. These properties are useful in hot-water and<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":9199,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[],"class_list":["post-9198","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ppr-pipe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PPR Aluminum Composite Pipe: Aluminum Layer Explained | DESO Group<\/title>\n<meta name=\"description\" content=\"Learn what the aluminum layer does in PPR aluminum composite pipe: oxygen barrier, lower thermal expansion, and better dimensional stability. 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