{"id":5649,"date":"2026-04-25T11:45:21","date_gmt":"2026-04-25T11:45:21","guid":{"rendered":"https:\/\/www.pipetechservice.com\/?p=5649"},"modified":"2026-04-25T11:45:26","modified_gmt":"2026-04-25T11:45:26","slug":"how-to-choose-the-right-pipe-plug-size-for-pipeline-isolation","status":"publish","type":"post","link":"https:\/\/www.pipetechservice.com\/fr\/how-to-choose-the-right-pipe-plug-size-for-pipeline-isolation\/","title":{"rendered":"How to Choose the Right Pipe Plug Size for Pipeline Isolation"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-a-practical-guide-to-pipe-plug-sizing-based-on-actual-pipe-id-pressure-rating-and-plug-type\">A Practical Guide to Pipe Plug Sizing Based on Actual Pipe ID, Pressure Rating, and Plug Type<\/h2>\n\n\n\n<p>Selecting the right pipe plug starts with one rule: use the actual internal diameter of the pipe, not the nominal pipe size alone. From there, match the measured ID to the manufacturer&#8217;s size range, then confirm pressure rating, media compatibility, and installation conditions. This guide walks you through each step with clear rules, practical examples, and field verification methods.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-measure-pipe-id-for-plug-sizing\">How to Measure Pipe ID for Plug Sizing<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Always measure actual internal diameter at the insertion point. Nominal pipe size is only a starting reference.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-step-by-step-measurement-process\">Step-by-Step Measurement Process<\/h3>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Clean the pipe interior\u00a0at the insertion point. Remove rust, debris, welding slag, and deposits.<\/li>\n\n\n\n<li>Insert your measurement tool\u00a0to a depth of at least 2x the pipe diameter.<\/li>\n\n\n\n<li>Take three measurements\u00a0at 120-degree intervals around the circumference.<\/li>\n\n\n\n<li>Record the smallest measurement\u00a0as your working ID. Use the smallest measured ID for plug selection.<\/li>\n\n\n\n<li><strong>Check for ovality.<\/strong>\u00a0If measurements vary significantly, note this for plug selection.<\/li>\n<\/ol>\n\n\n\n<p><strong>Tools by pipe size:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pipe Size<\/th><th>Recommended Tool<\/th><\/tr><\/thead><tbody><tr><td>Under 6&#8243;<\/td><td>Digital caliper<\/td><\/tr><tr><td>6&#8243; to 12&#8243;<\/td><td>Internal diameter tape<\/td><\/tr><tr><td>Over 12&#8243;<\/td><td>Telescoping bore gauge<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Why measurement matters:<\/strong>&nbsp;Two pipes with the same NPS but different schedules have different IDs. A 4-inch Schedule 40 pipe has 4.026&#8243; ID. A 4-inch Schedule 80 pipe has 3.826&#8243; ID. The same plug cannot seal both.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pipe-plug-sizing-by-pressure-rating\">Pipe Plug Sizing by Pressure Rating<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Pressure requirement is usually the primary factor determining plug type selection.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-pressure-based-selection-guidelines\">Pressure-Based Selection Guidelines<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pression de fonctionnement<\/th><th>Recommended Plug Type<\/th><th>Typical Applications<\/th><\/tr><\/thead><tbody><tr><td>0-15 PSI<\/td><td>Standard inflatable<\/td><td>Gravity sewer, storm drain, low-pressure gas<\/td><\/tr><tr><td>15-50 PSI<\/td><td>Reinforced inflatable<\/td><td>Water lines, irrigation, pneumatic tests<\/td><\/tr><tr><td>50-150 PSI<\/td><td>Heavy-duty inflatable or mechanical<\/td><td>Municipal water mains, chemical transfer<\/td><\/tr><tr><td>Above 150 PSI<\/td><td>Mechanical compression recommended<\/td><td>Natural gas, crude oil, steam lines<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Safety margin rule:<\/strong>&nbsp;Select a plug rated for at least 25% higher pressure than your maximum operating pressure. A line operating at 80 PSI requires a plug rated for minimum 100 PSI.<\/p>\n\n\n\n<p><strong>When inflatable plugs are not recommended:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Operating pressure above 150 PSI (though some heavy-duty models reach higher)<\/li>\n\n\n\n<li>Pipe temperature above 180\u00b0F for standard rubber<\/li>\n\n\n\n<li>Permanent installation longer than 30 days<\/li>\n<\/ul>\n\n\n\n<p><strong>When mechanical plugs are typically required:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Natural gas transmission lines (many codes specify mechanical)<\/li>\n\n\n\n<li>Pressures above 150 PSI<\/li>\n\n\n\n<li>Hydrocarbon service with long-term isolation needs<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-inflatable-vs-mechanical-pipe-plug\">Inflatable vs Mechanical Pipe Plug<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Choose inflatable for temporary, variable-size jobs under 150 PSI. Choose mechanical for high pressure, permanent installation, or repeated use.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Comparison Factor<\/th><th>Bouchon gonflable<\/th><th>Bouchon m\u00e9canique<\/th><\/tr><\/thead><tbody><tr><td>Sizing method<\/td><td>Diameter range (e.g., 6&#8243; to 10&#8243;)<\/td><td>Specific ID \u00b10.125&#8243;<\/td><\/tr><tr><td>Ovality tolerance<\/td><td>Up to 5% typical<\/td><td>Up to 2% typical<\/td><\/tr><tr><td>Max pressure<\/td><td>Depends on model and manufacturer<\/td><td>Depends on model and manufacturer<\/td><\/tr><tr><td>Installation time<\/td><td>2-5 minutes<\/td><td>5-15 minutes<\/td><\/tr><tr><td>Retrieval under pressure<\/td><td>Usually no<\/td><td>Some models yes<\/td><\/tr><tr><td>Cost per size range<\/td><td>Lower (one plug fits multiple sizes)<\/td><td>Higher (one plug per size)<\/td><\/tr><tr><td>Best application<\/td><td>Temporary, variable pipe conditions<\/td><td>Permanent, high-pressure, repeated use<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Selection shortcut:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temporary water\/sewer isolation under 50 PSI \u2192 Inflatable<\/li>\n\n\n\n<li>Natural gas above 100 PSI \u2192 Mechanical (check local codes)<\/li>\n\n\n\n<li>Multiple pipe sizes on one job \u2192 Inflatable<\/li>\n\n\n\n<li>Long-term permanent plug \u2192 Mechanical<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pipe-plug-size-chart-by-nps-and-id\">Pipe Plug Size Chart by NPS and ID<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Match your measured ID to the plug range column. Always verify pressure rating with the product datasheet.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Pipe NPS<\/th><th>Typical ID Range (inches)<\/th><th>Inflatable Plug Range<\/th><th>Mechanical Plug Size<\/th><\/tr><\/thead><tbody><tr><td>2&#8243;<\/td><td>1.94 &#8211; 2.07<\/td><td>1.75&#8243; &#8211; 2.25&#8243;<\/td><td>2&#8243;<\/td><\/tr><tr><td>3&#8243;<\/td><td>2.90 &#8211; 3.07<\/td><td>2.75&#8243; &#8211; 3.25&#8243;<\/td><td>3&#8243;<\/td><\/tr><tr><td>4&#8243;<\/td><td>3.83 &#8211; 4.03<\/td><td>3.75&#8243; &#8211; 4.50&#8243;<\/td><td>4&#8243;<\/td><\/tr><tr><td>6&#8243;<\/td><td>5.76 &#8211; 6.36<\/td><td>5.50&#8243; &#8211; 6.50&#8243;<\/td><td>6&#8243;<\/td><\/tr><tr><td>8&#8243;<\/td><td>7.63 &#8211; 8.39<\/td><td>7.50&#8243; &#8211; 8.50&#8243;<\/td><td>8&#8243;<\/td><\/tr><tr><td>10&#8243;<\/td><td>9.56 &#8211; 10.52<\/td><td>9.50&#8243; &#8211; 11.00&#8243;<\/td><td>10&#8243;<\/td><\/tr><tr><td>12&#8243;<\/td><td>11.50 &#8211; 12.54<\/td><td>11.50&#8243; &#8211; 13.00&#8243;<\/td><td>12&#8243;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-can-one-pipe-plug-size-cover-multiple-pipe-schedules\">Can One Pipe Plug Size Cover Multiple Pipe Schedules?<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Not necessarily. Different schedules change internal diameter significantly.<\/p>\n\n\n\n<p><strong>ID variation by schedule for 6-inch pipe:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Schedule<\/th><th>Internal Diameter<\/th><th>Same Plug Works?<\/th><\/tr><\/thead><tbody><tr><td>Schedule 10<\/td><td>6.357&#8243;<\/td><td>Usually no (too loose)<\/td><\/tr><tr><td>Schedule 40<\/td><td>6.065&#8243;<\/td><td>Reference size<\/td><\/tr><tr><td>Schedule 80<\/td><td>5.761&#8243;<\/td><td>Usually no (too tight)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Exception:<\/strong>&nbsp;Some mechanical plugs offer interchangeable rubber disc sets. A single metal body with different disc thicknesses can cover multiple schedules. Check manufacturer specifications.<\/p>\n\n\n\n<p><strong>Field advice:<\/strong>&nbsp;Pipe schedule is often unknown on older lines. Always measure ID directly rather than trusting schedule markings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-size-pipe-plugs-for-oval-or-deformed-pipe\">How to Size Pipe Plugs for Oval or Deformed Pipe<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Oval pipes require inflatable plugs with wider tolerance. Severely deformed pipes may need foam-filled plugs.<\/p>\n\n\n\n<p><strong>Identifying oval pipe:<\/strong>&nbsp;When your three ID measurements vary by more than 3% for steel pipe or 5% for plastic pipe, the pipe is out-of-round.<\/p>\n\n\n\n<p><strong>Solution by ovality percentage:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ovality<\/th><th>Recommended Solution<\/th><\/tr><\/thead><tbody><tr><td>Under 3%<\/td><td>Standard inflatable plug works<\/td><\/tr><tr><td>3% to 5%<\/td><td>Inflatable plug with wider range; consider one size smaller<\/td><\/tr><tr><td>5% to 8%<\/td><td>Foam-filled inflatable plug recommended (lower pressure rating)<\/td><\/tr><tr><td>Above 8%<\/td><td>Alternative isolation method advised<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Note on foam-filled plugs:<\/strong>&nbsp;These compress to 50-60% of pipe ID and expand to fill irregular shapes. Limitation: Maximum pressure rating is typically lower than standard plugs. Check manufacturer datasheet for specific ratings.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-verify-correct-plug-fit-before-full-pressure-application\">How to Verify Correct Plug Fit Before Full Pressure Application<\/h2>\n\n\n\n<p><strong>Core conclusion:<\/strong>&nbsp;Always perform a low-pressure verification test before applying full operating pressure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-three-field-verified-test-methods\">Three Field-Verified Test Methods<\/h3>\n\n\n\n<p><strong>Method 1: Bubble Test (low pressure applications)<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Insert and inflate plug to manufacturer spec<\/li>\n\n\n\n<li>Pressurize upstream side to 5 PSI<\/li>\n\n\n\n<li>Apply soap solution around plug perimeter<\/li>\n\n\n\n<li>Bubbles indicate bypass\u2014remove and size up<\/li>\n<\/ol>\n\n\n\n<p><strong>Method 2: Pressure Hold Test (all pressures)<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Isolate a test section between plug and a closed valve<\/li>\n\n\n\n<li>Pressurize to 50% of operating pressure<\/li>\n\n\n\n<li>Monitor gauge for 10 minutes<\/li>\n\n\n\n<li>Pressure drop exceeding 5% indicates seal issue<\/li>\n<\/ol>\n\n\n\n<p><strong>Method 3: Mechanical Pull Test (mechanical plugs only)<\/strong><\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Set plug according to manufacturer torque specification<\/li>\n\n\n\n<li>Attach pull cable to retrieval eye<\/li>\n\n\n\n<li>Apply moderate axial force<\/li>\n\n\n\n<li>Movement indicates insufficient compression<\/li>\n<\/ol>\n\n\n\n<p><strong>When to re-test:<\/strong>&nbsp;After any pressure spike, temperature change exceeding 30\u00b0F, or significant line vibration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-common-pipe-plug-sizing-mistakes\">Common Pipe Plug Sizing Mistakes<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Mistake<\/th><th>Consequence<\/th><th>Prevention<\/th><\/tr><\/thead><tbody><tr><td>Using NPS instead of measured ID<\/td><td>Bypass leakage or plug ejection<\/td><td>Always measure ID in the field<\/td><\/tr><tr><td>Ignoring pressure rating safety margin<\/td><td>Potential plug blowout<\/td><td>Add 25% safety margin<\/td><\/tr><tr><td>Assuming one plug fits all schedules<\/td><td>No seal or won&#8217;t insert<\/td><td>Check ID against plug range<\/td><\/tr><tr><td>Installing without verification test<\/td><td>Unknown leak path<\/td><td>Test at low pressure before use<\/td><\/tr><tr><td>Using wrong rubber for medium<\/td><td>Swelling or degradation<\/td><td>Request compatibility data<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-quick-decision-guide-for-pipe-plug-selection\">Quick Decision Guide for Pipe Plug Selection<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Measure actual ID\u00a0at the insertion point<\/li>\n\n\n\n<li>Check operating pressure\u00a0and add 25% safety margin<\/li>\n\n\n\n<li>Confirm medium compatibility\u00a0with elastomer options<\/li>\n\n\n\n<li>Choose inflatable or mechanical\u00a0based on pressure and job duration<\/li>\n\n\n\n<li>Select plug size\u00a0matching your measured ID to manufacturer range<\/li>\n\n\n\n<li>Verify fit\u00a0with low-pressure test before full operation<\/li>\n<\/ol>\n\n\n\n<p>This six-step sequence applies to most pipeline isolation jobs. Download or save this guide for field reference.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions-about-pipe-plug-sizing\">Frequently Asked Questions About Pipe Plug Sizing<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q1-is-pipe-plug-size-based-on-nps-or-actual-id\">Q1: Is pipe plug size based on NPS or actual ID?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Actual ID. NPS is only a starting reference. Always measure ID at the insertion point.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q2-how-do-i-measure-pipe-id-without-cutting-the-pipe\">Q2: How do I measure pipe ID without cutting the pipe?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Use an internal diameter tape or telescoping bore gauge inserted through an existing opening, flange, or tapped fitting. For pipes under 6 inches, a digital caliper works.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q3-what-happens-if-i-use-the-wrong-size-pipe-plug\">Q3: What happens if I use the wrong size pipe plug?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;An undersized plug leaks or blows out. An oversized plug won&#8217;t insert properly. Both create safety hazards.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q4-can-one-plug-fit-multiple-schedules\">Q4: Can one plug fit multiple schedules?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Not necessarily. Different schedules have different IDs. Check your actual measurement against the plug&#8217;s specified range.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q5-inflatable-vs-mechanical-which-should-i-choose\">Q5: Inflatable vs mechanical: which should I choose?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Inflatable for temporary jobs under 150 PSI. Mechanical for high pressure or permanent installation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q6-how-do-i-know-if-my-pipe-is-too-oval-for-a-standard-plug\">Q6: How do I know if my pipe is too oval for a standard plug?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Measure ID at three angles. If variation exceeds 3% for steel or 5% for plastic, consult the manufacturer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q7-can-i-reuse-a-pipe-plug-on-a-different-pipe-size\">Q7: Can I reuse a pipe plug on a different pipe size?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Inflatable plugs with a wide range can be reused within that range. Mechanical plugs are size-specific.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-q8-how-do-i-verify-a-pipe-plug-is-sealed-before-full-pressure\">Q8: How do I verify a pipe plug is sealed before full pressure?<\/h3>\n\n\n\n<p><strong>A :<\/strong>&nbsp;Run a pressure hold test at 50% of operating pressure for 10 minutes. Drop under 5% confirms good seal.<\/p>","protected":false},"excerpt":{"rendered":"<p>A Practical Guide to Pipe Plug Sizing Based on Actual Pipe ID, Pressure Rating, and Plug Type Selecting the right pipe plug starts with one rule: use the actual internal diameter of the pipe, not the nominal pipe size alone. From there, match the measured ID to the manufacturer&#8217;s size range, then confirm pressure rating, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5650,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"_uag_custom_page_level_css":"","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":"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":"","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-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":"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":[701],"tags":[500,754,753,752,95],"class_list":["post-5649","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trenchless-technology","tag-inflatable-pipe-plug","tag-mechanical-pipe-plug","tag-pipe-internal-diameter-measurement","tag-pipe-plug-size-selection","tag-pipeline-isolation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.5 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Choose the Right Pipe Plug Size for Pipeline Isolation | JSW<\/title>\n<meta name=\"description\" content=\"Learn pipe plug sizing based on actual ID measurement, pressure rating, and plug type. Step-by-step guide covers inflatable vs mechanical plugs, oval pipe solutions, and verification tests.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pipetechservice.com\/fr\/how-to-choose-the-right-pipe-plug-size-for-pipeline-isolation\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Choose the Right Pipe Plug Size for Pipeline Isolation\" \/>\n<meta property=\"og:description\" content=\"Learn pipe plug sizing based on actual ID measurement, pressure rating, and plug type. 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Practical Guide to Pipe Plug Sizing Based on Actual Pipe ID, Pressure Rating, and Plug Type Selecting the right pipe plug starts with one rule: use the actual internal diameter of the pipe, not the nominal pipe size alone. 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