{"id":2455,"date":"2024-10-26T16:30:57","date_gmt":"2024-10-26T16:30:57","guid":{"rendered":"https:\/\/yunming-metal.com\/?post_type=product&#038;p=2455"},"modified":"2025-05-31T20:09:42","modified_gmt":"2025-05-31T12:09:42","slug":"lap-joint-flange","status":"publish","type":"product","link":"https:\/\/yunming-metal.com\/en\/product\/lap-joint-flange\/","title":{"rendered":"Lap Joint Flange (Loose Flange)"},"content":{"rendered":"<h3 data-start=\"104\" data-end=\"130\"><strong data-start=\"108\" data-end=\"128\">Product Overview<\/strong><\/h3>\n<p data-start=\"131\" data-end=\"661\">Lap joint flanges, also known as loose flanges, are designed to be used with stub ends and allow easy alignment and rotation after welding. Since the flange is not welded directly to the pipe, it is especially suitable for applications requiring frequent disassembly, inspection, or alignment. Stainless steel lap joint flanges are corrosion-resistant and easy to install, making them ideal for non-critical, low to medium pressure piping systems. Available in sizes DN15 to DN3000 and compatible with ANSI, EN, and JIS standards.<\/p>\n<h3 data-start=\"663\" data-end=\"690\"><strong data-start=\"667\" data-end=\"688\">Application Areas<\/strong><\/h3>\n<ul data-start=\"691\" data-end=\"974\">\n<li data-start=\"691\" data-end=\"733\">\n<p data-start=\"693\" data-end=\"733\">Chemical and pharmaceutical processing<\/p>\n<\/li>\n<li data-start=\"734\" data-end=\"769\">\n<p data-start=\"736\" data-end=\"769\">Food and beverage manufacturing<\/p>\n<\/li>\n<li data-start=\"770\" data-end=\"815\">\n<p data-start=\"772\" data-end=\"815\">Water treatment and environmental systems<\/p>\n<\/li>\n<li data-start=\"816\" data-end=\"853\">\n<p data-start=\"818\" data-end=\"853\">Marine and shipbuilding pipelines<\/p>\n<\/li>\n<li data-start=\"854\" data-end=\"901\">\n<p data-start=\"856\" data-end=\"901\">Tank nozzles and heat exchanger connections<\/p>\n<\/li>\n<li data-start=\"902\" data-end=\"974\">\n<p data-start=\"904\" data-end=\"974\">Hygienic or clean-in-place (CIP) systems requiring frequent inspection<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"976\" data-end=\"1002\"><strong data-start=\"980\" data-end=\"1000\">Product Features<\/strong><\/h3>\n<ul data-start=\"1003\" data-end=\"1510\">\n<li data-start=\"1003\" data-end=\"1072\">\n<p data-start=\"1005\" data-end=\"1072\">Used with short or long stub ends for detachable pipe connections<\/p>\n<\/li>\n<li data-start=\"1073\" data-end=\"1121\">\n<p data-start=\"1075\" data-end=\"1121\">Allows free rotation for easy bolt alignment<\/p>\n<\/li>\n<li data-start=\"1122\" data-end=\"1192\">\n<p data-start=\"1124\" data-end=\"1192\">Ideal for non-welded joints in corrosive or vibrating environments<\/p>\n<\/li>\n<li data-start=\"1193\" data-end=\"1261\">\n<p data-start=\"1195\" data-end=\"1261\">Suitable for Class 150 to 2500 and PN6 to PN100 pressure ratings<\/p>\n<\/li>\n<li data-start=\"1262\" data-end=\"1334\">\n<p data-start=\"1264\" data-end=\"1334\">Manufactured in 304, 316L, 321, 310S, 904L, duplex, and other grades<\/p>\n<\/li>\n<li data-start=\"1335\" data-end=\"1386\">\n<p data-start=\"1337\" data-end=\"1386\">Available in raised face (RF) or flat face (FF)<\/p>\n<\/li>\n<li data-start=\"1387\" data-end=\"1461\">\n<p data-start=\"1389\" data-end=\"1461\">Complies with ANSI B16.5, EN 1092-1, JIS B2220, DIN, and ISO standards<\/p>\n<\/li>\n<li data-start=\"1462\" data-end=\"1510\">\n<p data-start=\"1464\" data-end=\"1510\">Smooth CNC-machined surface for gasket sealing<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1512\" data-end=\"1544\"><strong data-start=\"1516\" data-end=\"1544\">Technical Specifications<\/strong><\/h3>\n<div class=\"_tableContainer_16hzy_1\">\n<div class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1546\" data-end=\"2881\">\n<thead data-start=\"1546\" data-end=\"1647\">\n<tr data-start=\"1546\" data-end=\"1647\">\n<th data-start=\"1546\" data-end=\"1570\" data-col-size=\"sm\"><strong data-start=\"1548\" data-end=\"1561\">Parameter<\/strong><\/th>\n<th data-start=\"1570\" data-end=\"1647\" data-col-size=\"md\"><strong data-start=\"1572\" data-end=\"1581\">Range<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1750\" data-end=\"2881\">\n<tr data-start=\"1750\" data-end=\"1851\">\n<td data-start=\"1750\" data-end=\"1775\" data-col-size=\"sm\"><strong data-start=\"1752\" data-end=\"1773\">Nominal Size (DN)<\/strong><\/td>\n<td data-start=\"1775\" data-end=\"1851\" data-col-size=\"md\">DN15 \u2013 DN3000<\/td>\n<\/tr>\n<tr data-start=\"1852\" data-end=\"1955\">\n<td data-start=\"1852\" data-end=\"1880\" data-col-size=\"sm\"><strong data-start=\"1854\" data-end=\"1879\">Outside Diameter (OD)<\/strong><\/td>\n<td data-start=\"1880\" data-end=\"1955\" data-col-size=\"md\">34 mm \u2013 3200 mm (approx. 1\u2075\u2044\u2081\u2086\u2033 \u2013 126\u2033)<\/td>\n<\/tr>\n<tr data-start=\"1956\" data-end=\"2058\">\n<td data-start=\"1956\" data-end=\"1981\" data-col-size=\"sm\"><strong data-start=\"1958\" data-end=\"1975\">Thickness (T)<\/strong><\/td>\n<td data-start=\"1981\" data-end=\"2058\" data-col-size=\"md\">9 mm \u2013 120 mm (approx. \u00b3\u2044\u2088\u2033 \u2013 4\u00be\u2033)<\/td>\n<\/tr>\n<tr data-start=\"2059\" data-end=\"2161\">\n<td data-start=\"2059\" data-end=\"2084\" data-col-size=\"sm\"><strong data-start=\"2061\" data-end=\"2078\">Stub End Type<\/strong><\/td>\n<td data-start=\"2084\" data-end=\"2161\" data-col-size=\"md\">Short stub end \/ Long stub end \/ Custom sizes<\/td>\n<\/tr>\n<tr data-start=\"2162\" data-end=\"2264\">\n<td data-start=\"2162\" data-end=\"2187\" data-col-size=\"sm\"><strong data-start=\"2164\" data-end=\"2184\">Pressure Ratings<\/strong><\/td>\n<td data-start=\"2187\" data-end=\"2264\" data-col-size=\"md\">Class 150 \u2013 Class 2500 \/ PN6 \u2013 PN100<\/td>\n<\/tr>\n<tr data-start=\"2265\" data-end=\"2367\">\n<td data-start=\"2265\" data-end=\"2290\" data-col-size=\"sm\"><strong data-start=\"2267\" data-end=\"2286\">Material Grades<\/strong><\/td>\n<td data-start=\"2290\" data-end=\"2367\" data-col-size=\"md\">ASTM A182 F304 \/ F316 \/ F316L \/ F321 \/ 904L \/ 2205 etc.<\/td>\n<\/tr>\n<tr data-start=\"2368\" data-end=\"2470\">\n<td data-start=\"2368\" data-end=\"2393\" data-col-size=\"sm\"><strong data-start=\"2370\" data-end=\"2383\">Standards<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"2393\" data-end=\"2470\">ANSI B16.5, EN 1092-1, JIS B2220, DIN, BS, ISO<\/td>\n<\/tr>\n<tr data-start=\"2471\" data-end=\"2572\">\n<td data-start=\"2471\" data-end=\"2496\" data-col-size=\"sm\"><strong data-start=\"2473\" data-end=\"2481\">Type<\/strong><\/td>\n<td data-start=\"2496\" data-end=\"2572\" data-col-size=\"md\">Lap Joint Flange (Loose Flange), RF or FF face<\/td>\n<\/tr>\n<tr data-start=\"2573\" data-end=\"2675\">\n<td data-start=\"2573\" data-end=\"2598\" data-col-size=\"sm\"><strong data-start=\"2575\" data-end=\"2594\">Connection Type<\/strong><\/td>\n<td data-start=\"2598\" data-end=\"2675\" data-col-size=\"md\">Slide-on and rotate over stub end<\/td>\n<\/tr>\n<tr data-start=\"2676\" data-end=\"2778\">\n<td data-start=\"2676\" data-end=\"2701\" data-col-size=\"sm\"><strong data-start=\"2678\" data-end=\"2696\">Surface Finish<\/strong><\/td>\n<td data-col-size=\"md\" data-start=\"2701\" data-end=\"2778\">CNC machined, anti-rust oil coating<\/td>\n<\/tr>\n<tr data-start=\"2779\" data-end=\"2881\">\n<td data-start=\"2779\" data-end=\"2804\" data-col-size=\"sm\"><strong data-start=\"2781\" data-end=\"2796\">Application<\/strong><\/td>\n<td data-start=\"2804\" data-end=\"2881\" data-col-size=\"md\">Piping systems requiring removable and adjustable connections<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"sticky end-(--thread-content-margin) h-0 self-end select-none\">\n<div class=\"absolute end-0 flex items-end\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 data-start=\"2883\" data-end=\"2914\"><strong data-start=\"2887\" data-end=\"2912\">Manufacturing Process<\/strong><\/h3>\n<ol data-start=\"2915\" data-end=\"3393\">\n<li data-start=\"2915\" data-end=\"2996\">\n<p data-start=\"2918\" data-end=\"2996\"><strong data-start=\"2918\" data-end=\"2946\">Raw Material Preparation<\/strong> \u2013 Cut stainless steel plates or billets to size<\/p>\n<\/li>\n<li data-start=\"2997\" data-end=\"3077\">\n<p data-start=\"3000\" data-end=\"3077\"><strong data-start=\"3000\" data-end=\"3024\">Forging or Machining<\/strong> \u2013 Form flange rings through hot forging or turning<\/p>\n<\/li>\n<li data-start=\"3078\" data-end=\"3152\">\n<p data-start=\"3081\" data-end=\"3152\"><strong data-start=\"3081\" data-end=\"3098\">CNC Machining<\/strong> \u2013 Drill bolt holes, gasket surfaces, and inner bore<\/p>\n<\/li>\n<li data-start=\"3153\" data-end=\"3230\">\n<p data-start=\"3156\" data-end=\"3230\"><strong data-start=\"3156\" data-end=\"3177\">Surface Finishing<\/strong> \u2013 Apply anti-rust treatment and optional polishing<\/p>\n<\/li>\n<li data-start=\"3231\" data-end=\"3312\">\n<p data-start=\"3234\" data-end=\"3312\"><strong data-start=\"3234\" data-end=\"3258\">Inspection &amp; Marking<\/strong> \u2013 Check dimensions, flatness, and mark per standard<\/p>\n<\/li>\n<li data-start=\"3313\" data-end=\"3393\">\n<p data-start=\"3316\" data-end=\"3393\"><strong data-start=\"3316\" data-end=\"3329\">Packaging<\/strong> \u2013 Pack with moisture protection for safe international delivery<\/p>\n<\/li>\n<\/ol>\n<h3 data-start=\"3395\" data-end=\"3406\"><strong data-start=\"3399\" data-end=\"3406\">FAQ<\/strong><\/h3>\n<p data-start=\"3408\" data-end=\"3583\"><strong data-start=\"3408\" data-end=\"3479\">Q1: What&#8217;s the benefit of lap joint flanges over weld neck flanges?<\/strong><br data-start=\"3479\" data-end=\"3482\" \/>A: They are not welded to the pipe, allowing rotation for easier bolt hole alignment and disassembly.<\/p>\n<p data-start=\"3585\" data-end=\"3738\"><strong data-start=\"3585\" data-end=\"3636\">Q2: Can lap joint flanges handle high pressure?<\/strong><br data-start=\"3636\" data-end=\"3639\" \/>A: They are mainly used for low to medium pressure systems. For high pressure, use weld neck types.<\/p>\n<p data-start=\"3740\" data-end=\"3857\"><strong data-start=\"3740\" data-end=\"3782\">Q3: Do you provide matching stub ends?<\/strong><br data-start=\"3782\" data-end=\"3785\" \/>A: Yes. We supply short and long stub ends matched to lap joint flanges.<\/p>\n<p data-start=\"3859\" data-end=\"4005\"><strong data-start=\"3859\" data-end=\"3906\">Q4: What sizes and standards are available?<\/strong><br data-start=\"3906\" data-end=\"3909\" \/>A: Sizes range from DN15 to DN3000. Standards include ANSI B16.5, EN 1092-1, JIS B2220, and ISO.<\/p>\n<p data-start=\"4007\" data-end=\"4153\"><strong data-start=\"4007\" data-end=\"4070\">Q5: What materials are suitable for corrosive environments?<\/strong><br data-start=\"4070\" data-end=\"4073\" \/>A: Grades like 316L, 904L, and duplex 2205 are ideal for corrosive applications.<\/p>\n<p data-start=\"4267\" data-end=\"4501\"><strong data-start=\"4267\" data-end=\"4292\">Still have questions?<\/strong><br data-start=\"4292\" data-end=\"4295\" \/>Feel free to <a href=\"https:\/\/yunming-metal.com\/en\/contact\/\">contact us<\/a> for more details or to discuss your custom stainless steel loose flange requirements. Our technical support team is ready to assist with specifications, certifications, and delivery.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yunming Metal supplies stainless steel lap joint flanges (loose flanges) in sizes DN15\u2013DN3000. Designed for removable pipeline systems using stub ends, they comply with ANSI, EN, and JIS standards and are available in 304, 316L, 321, and duplex steel.<\/p>\n","protected":false},"featured_media":4767,"comment_status":"open","ping_status":"closed","template":"","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":"","theme-transparent-header-meta":"default","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 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":""}}},"product_brand":[],"product_cat":[28],"product_tag":[],"class_list":{"0":"post-2455","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-stainless-steel-flange","7":"desktop-align-left","8":"tablet-align-left","9":"mobile-align-left","11":"first","12":"instock","13":"shipping-taxable","14":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.9 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Lap Joint Flange (Loose Flange) | Stainless Steel ANSI\/EN<\/title>\n<meta name=\"description\" content=\"Stainless steel lap joint flanges (DN15\u2013DN3000) used with stub ends. ANSI, EN, JIS compliant. Detachable for easy pipe alignment and maintenance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/yunming-metal.com\/en\/product\/lap-joint-flange\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lap Joint Flange (Loose Flange)\" \/>\n<meta property=\"og:description\" content=\"Stainless steel lap joint flanges (DN15\u2013DN3000) used with stub ends. ANSI, EN, JIS compliant. 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