{"id":24114,"date":"2025-10-29T15:07:13","date_gmt":"2025-10-29T07:07:13","guid":{"rendered":"https:\/\/ifanplus.com\/?p=24114"},"modified":"2025-10-29T15:07:21","modified_gmt":"2025-10-29T07:07:21","slug":"%d8%b4%d8%b1%d8%ad-%d8%a3%d8%ad%d8%ac%d8%a7%d9%85-%d8%a3%d9%86%d8%a7%d8%a8%d9%8a%d8%a8-ppr-%d9%85%d8%b1%d8%ac%d8%b9-%d8%b3%d8%b1%d9%8a%d8%b9-%d9%84%d9%84%d8%a3%d8%a8%d8%b9%d8%a7%d8%af-dn-%d9%88%d8%a7","status":"publish","type":"post","link":"https:\/\/ifanplus.com\/ar\/%d9%85%d8%b9%d8%b1%d9%81%d8%a9\/%d8%b4%d8%b1%d8%ad-%d8%a3%d8%ad%d8%ac%d8%a7%d9%85-%d8%a3%d9%86%d8%a7%d8%a8%d9%8a%d8%a8-ppr-%d9%85%d8%b1%d8%ac%d8%b9-%d8%b3%d8%b1%d9%8a%d8%b9-%d9%84%d9%84%d8%a3%d8%a8%d8%b9%d8%a7%d8%af-dn-%d9%88%d8%a7\/","title":{"rendered":"\u0634\u0631\u062d \u0623\u062d\u062c\u0627\u0645 \u0623\u0646\u0627\u0628\u064a\u0628 PPR: \u0645\u0631\u062c\u0639 \u0633\u0631\u064a\u0639 \u0644\u0644\u0623\u0628\u0639\u0627\u062f DN \u0648\u0627\u0644\u0628\u0648\u0635\u0627\u062a"},"content":{"rendered":"<p class=\"wp-block-paragraph\">PPR pipe sizes bridge metric DN and familiar inches seamlessly\u2014DN20 equals \u00be-inch flow, DN25 delivers 1-inch capacity\u2014so you size <a href=\"https:\/\/ifanplus.com\/ar\">\u062a\u0631\u0643\u064a\u0628 \u0646\u0638\u0627\u0645 \u0627\u0644\u0631\u0634\u0627\u0634\u0627\u062a \u0644\u0645\u0643\u0627\u0641\u062d\u0629 \u0627\u0644\u062d\u0631\u0627\u0626\u0642 \u0627\u0644\u0633\u0643\u0646\u064a\u0629 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0623\u0646\u0627\u0628\u064a\u0628 PPR<\/a> perfectly every time without pressure drops or code violations. This guide maps every DN to inches, shares flow charts, and covers definitions, applications, buying tips, installation steps, and material comparisons. You finish with a cheat sheet that turns confusion into confidence for 50-year systems.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-frequently-asked-questions-faq\">\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>What does DN mean on PPR pipe, and how does it relate to inches?<\/strong>\u00a0DN stands for Diametre Nominal\u2014approximate inner diameter in millimeters. DN20 carries \u00be-inch flow (20 mm OD, 16 mm ID), DN25 matches 1-inch (25 mm OD, 20 mm ID).<\/li>\n\n\n\n<li><strong>What PPR size do I use for residential fire sprinkler system installation using PPR pipe in a 2,000 sq ft home?<\/strong>\u00a0Run DN32 (1\u00bc-inch) riser from the street, DN25 (1-inch) mains, DN20 (\u00be-inch) drops to heads\u2014delivers 13 gpm at 7 psi to the remotest head per NFPA 13D.<\/li>\n\n\n\n<li><strong>Is DN25 PPR the same as 1-inch copper pipe in flow?<\/strong>\u00a0Yes\u2014DN25 PPR has 20.4 mm ID, slightly more than 1-inch copper&#8217;s 19 mm, so flow matches or exceeds at the same pressure.<\/li>\n\n\n\n<li><strong>How do I transition from DN20 to DN32 PPR?<\/strong>\u00a0Use a DN32 x DN20 reducing socket\u2014fuse DN20 side 5 seconds, DN32 side 12 seconds at 500\u00b0F. Support both sides to prevent stress.<\/li>\n\n\n\n<li><strong>Does wall thickness change with DN size in PPR?<\/strong>\u00a0Yes\u2014SDR sets wall thickness. SDR 11 keeps pressure rating consistent across sizes; DN20 SDR 11 walls are 3.4 mm, DN32 are 5.4 mm.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-basic-definition-and-features-of-ppr-pipe-systems\">Basic Definition and Features of PPR Pipe Systems<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">PPR means polypropylene random copolymer\u2014a tough plastic that installers fuse into leak-proof networks. Socket fusion melts pipe and fitting at 500\u00b0F, creating joints stronger than the wall. No corrosion, no scale, no leaks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Core features include outer diameter (OD) defining DN size\u2014DN20 OD 20 mm, DN25 OD 25 mm. Inner diameter (ID) sets flow\u2014subtract wall thickness twice. Thermal expansion stays 0.15 mm\/m\/\u00b0C standard or 0.03 mm\/m\/\u00b0C fiber-reinforced.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hygiene leads\u2014PPR never rusts. Colors code function: green for cold, white for hot, red stripe for fire. Diameters run DN16 to DN160. Wall thickness sets the SDR\u2014SDR 11 for 145 psi cold.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern PPR carries UL listing for fire when rated. Sound dampening silences flow. Weight stays 0.1 kg per meter\u2014one worker lifts a 13-foot stick. These traits make PPR size-flexible for any job.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With basics clear, let\u2019s see where DN sizes flow daily.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-common-uses-and-application-industries\">\u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0648\u0627\u0644\u0635\u0646\u0627\u0639\u0627\u062a \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u064a\u0629<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Home builders run DN32 PPR from meters to manifolds\u20141\u00bc-inch capacity for whole-house. DN25 branches feed bathrooms\u20141-inch flow without noise. DN20 drops to faucets\u2014\u00be-inch precision.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fire sprinklers use DN25 risers for 12 heads\u2014NFPA 13D compliant. Apartments feed 20 units with DN50 mains\u20142-inch volume. Hotels pipe DN40 hot loops\u20141\u00bd-inch to 300 rooms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Solar farms link panels with DN63 PPR\u20142\u00bd-inch glycol. Breweries run DN50 wort lines\u20142-inch precision. Greenhouses irrigate with DN32 headers\u20141\u00bc-inch coverage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Across sectors, DN sizes prevent bottlenecks. Now let\u2019s match DN to inches.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-buying-guide-key-factors-to-consider\">\u062f\u0644\u064a\u0644 \u0627\u0644\u0634\u0631\u0627\u0621: \u0627\u0644\u0639\u0648\u0627\u0645\u0644 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0627\u0644\u062a\u064a \u064a\u062c\u0628 \u0645\u0631\u0627\u0639\u0627\u062a\u0647\u0627<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Convert DN to inches first\u2014DN = OD in mm. Use the quick reference for residential fire sprinkler system installation using PPR pipe.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>DN<\/th><th>OD (mm)<\/th><th>Approx Inch<\/th><th>ID SDR 11 (mm)<\/th><th>Flow @ 5 ft\/s (gpm)<\/th><\/tr><\/thead><tbody><tr><td>16<\/td><td>16<\/td><td>\u00bd<\/td><td>11.6<\/td><td>4<\/td><\/tr><tr><td>20<\/td><td>20<\/td><td>\u00be<\/td><td>16.2<\/td><td>8<\/td><\/tr><tr><td>25<\/td><td>25<\/td><td>1<\/td><td>20.4<\/td><td>12<\/td><\/tr><tr><td>32<\/td><td>32<\/td><td>1\u00bc<\/td><td>26.0<\/td><td>20<\/td><\/tr><tr><td>40<\/td><td>40<\/td><td>1\u00bd<\/td><td>32.6<\/td><td>32<\/td><\/tr><tr><td>50<\/td><td>50<\/td><td>2<\/td><td>40.8<\/td><td>50<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Choose SDR 7.4 for fire\u2014thicker walls. Pick red-striped PPR for sprinklers. Certifications matter\u2014UL 1821 for fire pipe, NSF\/ANSI 61 for potable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Budget $1.20 per meter DN25, $15 per sprinkler head. Buy 10% extra reducers\u2014future taps happen. These choices lock in perfect sizing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With parts ready, flawless joints prevent every failure.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-installation-tips-and-precautions\">Installation Tips and Precautions<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Mark DN sizes on pipe\u2014DN20, DN32. Support every 3 feet with size-matched clips. Fusion weld in sequence\u2014smaller DN first.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cut square, chamfer 15 degrees. Heat socket tool to 500\u00b0F. Insert DN20 5 seconds, DN32 12 seconds. Join reducer within 4 seconds, twist 1\/8 turn, hold 10 seconds.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pressure test at 200 psi for fire systems\u2014zero drop. Flush cold water to clear residue. Label risers: \u201cDN32 FIRE MAIN.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Wear gloves\u2014molten PPR sticks. These steps turn good pipe into sized-right flow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To see why PPR beats metals, study the comparison.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-ppr-pipe-systems-vs-other-material-pipe-systems-a-comparison\">PPR Pipe Systems vs. Other Material Pipe Systems: A Comparison<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Aspect<\/th><th>PPR (DN Sizes)<\/th><th>Copper (Inch)<\/th><th>\u0628\u0648\u0631\u0635\u0629 \u0628\u064a \u0625\u064a \u0625\u0643\u0633<\/th><th>\u0633\u064a \u0628\u064a \u0641\u064a \u0633\u064a<\/th><\/tr><\/thead><tbody><tr><td>Size Labeling<\/td><td>DN20 = \u00be-inch flow<\/td><td>\u00be-inch nominal<\/td><td>\u00be-inch CTS<\/td><td>\u00be-inch nominal<\/td><\/tr><tr><td>Flow Match<\/td><td>Exact<\/td><td>Slightly less ID<\/td><td>Similar<\/td><td>Similar<\/td><\/tr><tr><td>\u062a\u0622\u0643\u0644<\/td><td>Zero<\/td><td>Pinholes<\/td><td>\u0644\u0627 \u0623\u062d\u062f<\/td><td>Chlorine attack<\/td><\/tr><tr><td>Joint Method<\/td><td>Fusion 10 sec<\/td><td>Solder 3 min<\/td><td>Crimp 30 sec<\/td><td>Solvent 1 hr<\/td><\/tr><tr><td>Cost DN25\/1&#8243; per meter<\/td><td>$1.40<\/td><td>$6.50<\/td><td>$1.20<\/td><td>$1.80<\/td><\/tr><tr><td>\u0639\u0645\u0631<\/td><td>50\u2013100 years<\/td><td><\/td><td>40\u2013<\/td><td>25\u2013<\/td><\/tr><tr><td>\u0633\u0631\u0639\u0629 \u0627\u0644\u062a\u062b\u0628\u064a\u062a<\/td><td>100 ft\/hour<\/td><td>40 ft\/hour<\/td><td>80 ft\/hour<\/td><td>60 ft\/hour<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">PPR wins on labeling and life. Copper confuses ID\/OD. PEX sizes vary. CPVC stays budget. Choose PPR for clear DN sizing.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-conclusion\">\u062e\u0627\u062a\u0645\u0629<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">PPR pipe sizes decode instantly\u2014DN20 for \u00be-inch, DN25 for 1-inch\u2014so your residential fire sprinkler system installation using PPR pipe flows at code minimums for half a century. Follow the DN-to-inch chart, fuse smaller first, and test every joint\u2014your plumbing scales perfectly forever.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Need DN-sized PPR today? Visit our Huntington Beach warehouse at 5332 Production Dr, Huntington Beach, CA 92649. We stock every DN, reducer, and fusion die for immediate pickup.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-connect\">\u064a\u062a\u0635\u0644<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">IFAN is a Chinese manufacturer of plastic pipes, fittings and valves with  of experience. If you are interest in IFAN copper fittings, copper valves, plastic pipes and fittings, please contact us. IFAN offers you a variety of standard pipes to meet your specific needs. Click below to learn more about IFAN&#8217;s wide range of affordable and cost-effective valve products and piping system related products.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We will reply your email or fax within 24 hours. You can call us at any time if there is any question on our production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0644\u0645\u0632\u064a\u062f \u0645\u0646 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a\u060c \u064a\u0631\u062c\u0649 \u0632\u064a\u0627\u0631\u0629 \u0645\u0648\u0642\u0639\u0646\u0627 \u0639\u0644\u0649 \u0634\u0628\u0643\u0629 \u0627\u0644\u0625\u0646\u062a\u0631\u0646\u062a\u00a0<a href=\"https:\/\/ifanplus.com\/ar\">https:\/\/www.ifanplus.com\/<\/a><br>\u064a\u0631\u062c\u0649 \u0625\u0631\u0633\u0627\u0644 \u0628\u0631\u064a\u062f \u0625\u0644\u0649:\u00a0<a href=\"mailto:jack@ifangroup.com\">jack@ifangroup.com<\/a><br><a href=\"https:\/\/api.whatsapp.com\/send?l=en&amp;phone=8619857948982\">\u0648\u0627\u062a\u0633\u0627\u0628: +86 19857948982<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>PPR pipe sizes bridge metric DN and familiar inches seamlessly\u2014DN20 equals \u00be-inch flow, DN25 delivers 1-inch capacity\u2014so you size residential fire sprinkler system installation using PPR pipe perfectly every time without pressure drops or code violations. This guide maps every DN to inches, shares flow charts, and covers definitions, applications, buying tips, installation steps, and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":24112,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"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":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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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-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":""},"mobile":{"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":""}},"footnotes":""},"categories":[13],"tags":[801,802],"class_list":["post-24114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-ppr-pipe-for-chilled-water-air-conditioning-systems","tag-residential-fire-sprinkler-system-installation-using-ppr-pipe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>PPR Pipe Sizes Explained: A Quick Reference for DN and Inches - IFAN Manufacturer<\/title>\n<meta name=\"description\" content=\"so you size residential fire sprinkler system installation using PPR pipe perfectly every time without pressure drops or code violations.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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