{"id":2434,"date":"2024-10-26T16:19:28","date_gmt":"2024-10-26T16:19:28","guid":{"rendered":"https:\/\/yunming-metal.com\/?post_type=product&#038;p=2434"},"modified":"2025-05-25T23:23:53","modified_gmt":"2025-05-25T15:23:53","slug":"blind-flange-bl","status":"publish","type":"product","link":"https:\/\/yunming-metal.com\/en\/product\/blind-flange-bl\/","title":{"rendered":"Blind Flange (BL)"},"content":{"rendered":"<h3 data-start=\"122\" data-end=\"148\"><strong data-start=\"126\" data-end=\"146\">Product Overview<\/strong><\/h3>\n<p data-start=\"149\" data-end=\"610\">Blind flanges (BL flanges) are solid disks used to close off the ends of piping systems or pressure vessel openings. They allow easy access for inspection, cleaning, or modification of the pipeline. Stainless steel blind flanges provide exceptional durability and corrosion resistance, making them ideal for demanding industrial applications. With size availability from DN15 to DN3000, they support a wide range of international standards and pressure ratings.<\/p>\n<h3 data-start=\"612\" data-end=\"639\"><strong data-start=\"616\" data-end=\"637\">Application Areas<\/strong><\/h3>\n<ul data-start=\"640\" data-end=\"851\">\n<li data-start=\"640\" data-end=\"667\">\n<p data-start=\"642\" data-end=\"667\">Petrochemical pipelines<\/p>\n<\/li>\n<li data-start=\"668\" data-end=\"694\">\n<p data-start=\"670\" data-end=\"694\">Oil and gas facilities<\/p>\n<\/li>\n<li data-start=\"695\" data-end=\"737\">\n<p data-start=\"697\" data-end=\"737\">Water treatment and wastewater systems<\/p>\n<\/li>\n<li data-start=\"738\" data-end=\"775\">\n<p data-start=\"740\" data-end=\"775\">Power plants and pressure vessels<\/p>\n<\/li>\n<li data-start=\"776\" data-end=\"814\">\n<p data-start=\"778\" data-end=\"814\">Food and pharmaceutical processing<\/p>\n<\/li>\n<li data-start=\"815\" data-end=\"851\">\n<p data-start=\"817\" data-end=\"851\">Marine and shipbuilding industries<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"853\" data-end=\"879\"><strong data-start=\"857\" data-end=\"877\">Product Features<\/strong><\/h3>\n<ul data-start=\"880\" data-end=\"1328\">\n<li data-start=\"880\" data-end=\"923\">\n<p data-start=\"882\" data-end=\"923\">Full face sealing with no internal bore<\/p>\n<\/li>\n<li data-start=\"924\" data-end=\"1000\">\n<p data-start=\"926\" data-end=\"1000\">Available in flat face (FF), raised face (RF), and ring type joint (RTJ)<\/p>\n<\/li>\n<li data-start=\"1001\" data-end=\"1070\">\n<p data-start=\"1003\" data-end=\"1070\">Supports pressure ratings from Class 150 to 2500 and PN6 to PN100<\/p>\n<\/li>\n<li data-start=\"1071\" data-end=\"1105\">\n<p data-start=\"1073\" data-end=\"1105\">Size range from DN15 to DN3000<\/p>\n<\/li>\n<li data-start=\"1106\" data-end=\"1153\">\n<p data-start=\"1108\" data-end=\"1153\">Machined surface ensures leak-proof sealing<\/p>\n<\/li>\n<li data-start=\"1154\" data-end=\"1265\">\n<p data-start=\"1156\" data-end=\"1265\">Made from corrosion-resistant stainless steel grades including 304, 316L, 321, 310S, 904L, and duplex steel<\/p>\n<\/li>\n<li data-start=\"1266\" data-end=\"1328\">\n<p data-start=\"1268\" data-end=\"1328\">Easy disassembly and reassembly for maintenance or expansion<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"1330\" data-end=\"1362\"><strong data-start=\"1334\" data-end=\"1362\">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=\"1364\" data-end=\"2630\">\n<thead data-start=\"1364\" data-end=\"1465\">\n<tr data-start=\"1364\" data-end=\"1465\">\n<th data-start=\"1364\" data-end=\"1388\" data-col-size=\"sm\"><strong data-start=\"1366\" data-end=\"1379\">Parameter<\/strong><\/th>\n<th data-start=\"1388\" data-end=\"1465\" data-col-size=\"lg\"><strong data-start=\"1390\" data-end=\"1399\">Range<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1568\" data-end=\"2630\">\n<tr data-start=\"1568\" data-end=\"1669\">\n<td data-start=\"1568\" data-end=\"1593\" data-col-size=\"sm\"><strong data-start=\"1570\" data-end=\"1591\">Nominal Size (DN)<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"1593\" data-end=\"1669\">DN15 \u2013 DN3000<\/td>\n<\/tr>\n<tr data-start=\"1670\" data-end=\"1773\">\n<td data-start=\"1670\" data-end=\"1698\" data-col-size=\"sm\"><strong data-start=\"1672\" data-end=\"1697\">Outside Diameter (OD)<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"1698\" data-end=\"1773\">34 mm \u2013 3200 mm (approx. 1\u2075\u2044\u2081\u2086\u2033 \u2013 126\u2033)<\/td>\n<\/tr>\n<tr data-start=\"1774\" data-end=\"1876\">\n<td data-start=\"1774\" data-end=\"1799\" data-col-size=\"sm\"><strong data-start=\"1776\" data-end=\"1793\">Thickness (T)<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"1799\" data-end=\"1876\">10 mm \u2013 120 mm (approx. \u00b3\u2044\u2088\u2033 \u2013 4\u00be\u2033)<\/td>\n<\/tr>\n<tr data-start=\"1877\" data-end=\"1979\">\n<td data-start=\"1877\" data-end=\"1902\" data-col-size=\"sm\"><strong data-start=\"1879\" data-end=\"1899\">Pressure Ratings<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"1902\" data-end=\"1979\">Class 150 \u2013 Class 2500 \/ PN6 \u2013 PN100<\/td>\n<\/tr>\n<tr data-start=\"1980\" data-end=\"2081\">\n<td data-start=\"1980\" data-end=\"2005\" data-col-size=\"sm\"><strong data-start=\"1982\" data-end=\"2001\">Material Grades<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"2005\" data-end=\"2081\">ASTM A182 F304 \/ F316 \/ F316L \/ F321 \/ 310S \/ 904L \/ 2205 etc.<\/td>\n<\/tr>\n<tr data-start=\"2082\" data-end=\"2184\">\n<td data-start=\"2082\" data-end=\"2107\" data-col-size=\"sm\"><strong data-start=\"2084\" data-end=\"2097\">Standards<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"2107\" data-end=\"2184\">ANSI B16.5, EN 1092-1, JIS B2220, DIN, BS, GB, ISO etc.<\/td>\n<\/tr>\n<tr data-start=\"2185\" data-end=\"2286\">\n<td data-start=\"2185\" data-end=\"2210\" data-col-size=\"sm\"><strong data-start=\"2187\" data-end=\"2195\">Type<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"2210\" data-end=\"2286\">Blind Flange (BL), available with RF \/ FF \/ RTJ face types<\/td>\n<\/tr>\n<tr data-start=\"2287\" data-end=\"2388\">\n<td data-start=\"2287\" data-end=\"2312\" data-col-size=\"sm\"><strong data-start=\"2289\" data-end=\"2308\">Connection Type<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"2312\" data-end=\"2388\">Full face sealing \u2013 no bore, drilled bolt holes for secure connection<\/td>\n<\/tr>\n<tr data-start=\"2389\" data-end=\"2491\">\n<td data-start=\"2389\" data-end=\"2414\" data-col-size=\"sm\"><strong data-start=\"2391\" data-end=\"2409\">Surface Finish<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"2414\" data-end=\"2491\">CNC machined, anti-rust oil coating<\/td>\n<\/tr>\n<tr data-start=\"2492\" data-end=\"2630\">\n<td data-start=\"2492\" data-end=\"2517\" data-col-size=\"sm\"><strong data-start=\"2494\" data-end=\"2509\">Application<\/strong><\/td>\n<td data-col-size=\"lg\" data-start=\"2517\" data-end=\"2630\">Construction, petroleum, chemical, shipbuilding, water systems, power, metallurgy, HVAC, and general industry<\/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=\"2632\" data-end=\"2663\"><strong data-start=\"2636\" data-end=\"2661\">Manufacturing Process<\/strong><\/h3>\n<ol data-start=\"2664\" data-end=\"3176\">\n<li data-start=\"2664\" data-end=\"2773\">\n<p data-start=\"2667\" data-end=\"2773\"><strong data-start=\"2667\" data-end=\"2693\">Raw Material Selection<\/strong> \u2013 Choose stainless steel billets or plates according to customer requirements<\/p>\n<\/li>\n<li data-start=\"2774\" data-end=\"2869\">\n<p data-start=\"2777\" data-end=\"2869\"><strong data-start=\"2777\" data-end=\"2794\">Blank Cutting<\/strong> \u2013 Material is cut into round blanks per specified diameter and thickness<\/p>\n<\/li>\n<li data-start=\"2870\" data-end=\"2949\">\n<p data-start=\"2873\" data-end=\"2949\"><strong data-start=\"2873\" data-end=\"2896\">Forging and Shaping<\/strong> \u2013 Flanges are shaped and flattened as per standard<\/p>\n<\/li>\n<li data-start=\"2950\" data-end=\"3018\">\n<p data-start=\"2953\" data-end=\"3018\"><strong data-start=\"2953\" data-end=\"2970\">CNC Machining<\/strong> \u2013 Precision machining of faces and bolt holes<\/p>\n<\/li>\n<li data-start=\"3019\" data-end=\"3096\">\n<p data-start=\"3022\" data-end=\"3096\"><strong data-start=\"3022\" data-end=\"3043\">Surface Treatment<\/strong> \u2013 Anti-rust oil application and optional polishing<\/p>\n<\/li>\n<li data-start=\"3097\" data-end=\"3176\">\n<p data-start=\"3100\" data-end=\"3176\"><strong data-start=\"3100\" data-end=\"3126\">Inspection &amp; Packaging<\/strong> \u2013 Dimensional and quality checks before packaging<\/p>\n<\/li>\n<\/ol>\n<h3 data-start=\"3178\" data-end=\"3189\"><strong data-start=\"3182\" data-end=\"3189\">FAQ<\/strong><\/h3>\n<p data-start=\"3191\" data-end=\"3396\"><strong data-start=\"3191\" data-end=\"3267\">Q1: What\u2019s the difference between a blind flange and a weld neck flange?<\/strong><br data-start=\"3267\" data-end=\"3270\" \/>A: A blind flange is solid and used to block off a pipe end, whereas a weld neck flange connects two pipe ends and has a bore.<\/p>\n<p data-start=\"3398\" data-end=\"3523\"><strong data-start=\"3398\" data-end=\"3444\">Q2: Do you offer large-size blind flanges?<\/strong><br data-start=\"3444\" data-end=\"3447\" \/>A: Yes, we supply stainless steel blind flanges up to DN3000 (approx. 120\u2033).<\/p>\n<p data-start=\"3525\" data-end=\"3662\"><strong data-start=\"3525\" data-end=\"3572\">Q3: Can blind flanges handle high pressure?<\/strong><br data-start=\"3572\" data-end=\"3575\" \/>A: Absolutely. We provide Class 150 to Class 2500 and PN6 to PN100 rated blind flanges.<\/p>\n<p data-start=\"3664\" data-end=\"3787\"><strong data-start=\"3664\" data-end=\"3704\">Q4: Which face types do you support?<\/strong><br data-start=\"3704\" data-end=\"3707\" \/>A: We offer raised face (RF), flat face (FF), and ring type joint (RTJ) options.<\/p>\n<p data-start=\"3789\" data-end=\"3941\"><strong data-start=\"3789\" data-end=\"3843\">Q5: Do you supply MTCs and third-party inspection?<\/strong><br data-start=\"3843\" data-end=\"3846\" \/>A: Yes. EN 10204 3.1\/3.2 material test certificates and third-party inspection can be provided.<\/p>\n<p data-start=\"3789\" data-end=\"3941\"><strong data-start=\"97\" data-end=\"122\">Still have questions?<\/strong><br data-start=\"122\" data-end=\"125\" \/>Feel free to <a href=\"https:\/\/yunming-metal.com\/en\/contact\/\">contact us<\/a> for more details or to discuss your custom stainless steel blind flange requirements. Our technical support team is ready to assist with specifications, certifications, and delivery.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yunming Metal offers stainless steel blind flanges (BL) in sizes DN15\u2013DN3000. Designed for pipeline closure and pressure vessel ends, they are available in 304, 316L, 321, and 904L. Precision-machined with raised, flat, or RTJ faces. Supports Class 150\u20132500 and PN6\u2013PN100.<\/p>\n","protected":false},"featured_media":4753,"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-2434","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>Blind Flange (BL) \u2013 Stainless Steel ANSI\/EN Standard<\/title>\n<meta name=\"description\" content=\"Stainless steel blind flanges (DN15\u2013DN3000) for ANSI, EN, JIS pipelines. Leak-proof sealing, Class 150\u20132500, 304\/316L\/321 available.\" \/>\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\/blind-flange-bl\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Blind Flange (BL)\" \/>\n<meta property=\"og:description\" content=\"Stainless steel blind flanges (DN15\u2013DN3000) for ANSI, EN, JIS pipelines. 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