{"id":2452,"date":"2024-10-26T16:28:51","date_gmt":"2024-10-26T16:28:51","guid":{"rendered":"https:\/\/yunming-metal.com\/?post_type=product&p=2452"},"modified":"2025-05-25T23:55:42","modified_gmt":"2025-05-25T15:55:42","slug":"welding-neck-flange-wn","status":"publish","type":"product","link":"https:\/\/yunming-metal.com\/en\/product\/welding-neck-flange-wn\/","title":{"rendered":"Welding Neck Flange (WN)"},"content":{"rendered":"

Product Overview<\/strong><\/h3>\n

Welding neck flanges (WN flanges) are designed with a long tapered hub that gradually transitions to the pipe wall thickness, offering excellent stress distribution. This design makes them ideal for high-pressure, high-temperature, or repeated bending applications. These flanges are butt-welded to the pipe, ensuring high strength and leak-free connections. Available in stainless steel grades such as 304, 316L, and 321, our WN flanges are manufactured in compliance with ANSI, EN, JIS, and other global standards.<\/p>\n

Application Areas<\/strong><\/h3>\n
    \n
  • \n

    High-pressure oil and gas pipelines<\/p>\n<\/li>\n

  • \n

    Chemical and petrochemical processing plants<\/p>\n<\/li>\n

  • \n

    Boiler and pressure vessel systems<\/p>\n<\/li>\n

  • \n

    Power generation and thermal plants<\/p>\n<\/li>\n

  • \n

    Offshore platforms and marine engineering<\/p>\n<\/li>\n

  • \n

    Refineries and industrial piping systems<\/p>\n<\/li>\n<\/ul>\n

    Product Features<\/strong><\/h3>\n
      \n
    • \n

      Long tapered hub for superior stress distribution<\/p>\n<\/li>\n

    • \n

      Butt-welded design ensures high-integrity connections<\/p>\n<\/li>\n

    • \n

      Suitable for severe temperature and pressure conditions<\/p>\n<\/li>\n

    • \n

      Size range from DN15 to DN3000 (approx. \u00bd\u2033 \u2013 120\u2033)<\/p>\n<\/li>\n

    • \n

      Available in RF, RTJ, and custom sealing face types<\/p>\n<\/li>\n

    • \n

      Supports Class 150 \u2013 2500 and PN6 \u2013 PN100 pressure ratings<\/p>\n<\/li>\n

    • \n

      Machined surface finish for precise sealing<\/p>\n<\/li>\n

    • \n

      Compatible with ANSI B16.5, EN 1092-1, JIS B2220, and more<\/p>\n<\/li>\n<\/ul>\n

      Technical Specifications<\/strong><\/h3>\n
      \n
      \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Parameter<\/strong><\/th>\nRange<\/strong><\/th>\n<\/tr>\n<\/thead>\n
      Nominal Size (DN)<\/strong><\/td>\nDN15 \u2013 DN3000<\/td>\n<\/tr>\n
      Outside Diameter (OD)<\/strong><\/td>\n34 mm \u2013 3200 mm (approx. 1\u2075\u2044\u2081\u2086\u2033 \u2013 126\u2033)<\/td>\n<\/tr>\n
      Neck Length<\/strong><\/td>\n40 mm \u2013 500 mm (approx. 1\u00bd\u2033 \u2013 20\u2033)<\/td>\n<\/tr>\n
      Thickness (T)<\/strong><\/td>\n10 mm \u2013 120 mm (approx. \u00b3\u2044\u2088\u2033 \u2013 4\u00be\u2033)<\/td>\n<\/tr>\n
      Pressure Ratings<\/strong><\/td>\nClass 150 \u2013 Class 2500 \/ PN6 \u2013 PN100<\/td>\n<\/tr>\n
      Material Grades<\/strong><\/td>\nASTM A182 F304 \/ F316 \/ F316L \/ F321 \/ 310S \/ 904L \/ 2205 etc.<\/td>\n<\/tr>\n
      Standards<\/strong><\/td>\nANSI B16.5, EN 1092-1, JIS B2220, DIN, BS, GB, ISO etc.<\/td>\n<\/tr>\n
      Type<\/strong><\/td>\nWelding Neck Flange (WN), raised face, RTJ face, custom face types<\/td>\n<\/tr>\n
      Connection Type<\/strong><\/td>\nButt-weld connection with pipe for structural integrity<\/td>\n<\/tr>\n
      Surface Finish<\/strong><\/td>\nCNC machined, anti-rust oil coating<\/td>\n<\/tr>\n
      Application<\/strong><\/td>\nOil & gas, chemical, thermal power, boiler systems, marine piping, high-pressure industrial networks<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n
      <\/div>\n<\/div>\n<\/div>\n<\/div>\n

      Manufacturing Process<\/strong><\/h3>\n
        \n
      1. \n

        Raw Material Cutting<\/strong> \u2013 Flange blanks are cut from stainless steel billets or plates<\/p>\n<\/li>\n

      2. \n

        Forging & Heat Treatment<\/strong> \u2013 Flanges are forged and treated for strength and durability<\/p>\n<\/li>\n

      3. \n

        CNC Machining<\/strong> \u2013 Precision machining of bore, sealing face, bolt holes, and neck<\/p>\n<\/li>\n

      4. \n

        Welding End Shaping<\/strong> \u2013 Beveling and tapering to match pipe wall thickness<\/p>\n<\/li>\n

      5. \n

        Surface Finishing<\/strong> \u2013 Smooth finish with anti-corrosion coating applied<\/p>\n<\/li>\n

      6. \n

        Inspection & Marking<\/strong> \u2013 Dimensional inspection and standard-compliant stamping<\/p>\n<\/li>\n<\/ol>\n

        FAQ<\/strong><\/h3>\n

        Q1: What makes welding neck flanges ideal for high-pressure applications?<\/strong>
        A: The tapered hub and butt-weld connection offer excellent strength and stress resistance, especially under pressure or thermal expansion.<\/p>\n

        Q2: What size range do you supply?<\/strong>
        A: We offer WN flanges from DN15 to DN3000 (approx. \u00bd\u2033 to 120\u2033 OD).<\/p>\n

        Q3: Are your flanges compliant with international standards?<\/strong>
        A: Yes, we manufacture to ANSI, EN, JIS, DIN, and ISO standards.<\/p>\n

        Q4: What materials are available for corrosive environments?<\/strong>
        A: Options include 304, 316L, 321, 904L, duplex 2205, and more.<\/p>\n

        Q5: Do you offer third-party inspection and MTCs?<\/strong>
        A: Absolutely. EN 10204 3.1\/3.2 certificates and third-party inspection are available upon request.<\/p>\n

        Still have questions?<\/strong>
        Feel free to contact us for more details or to discuss your custom stainless steel welding neck flange requirements. Our technical support team is ready to assist with specifications, certifications, and delivery.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Yunming Metal offers stainless steel welding neck flanges (WN) in DN15\u2013DN3000 sizes. Butt-welded with tapered neck for high-pressure systems, they meet ANSI, EN, and JIS standards. Available in 304, 316L, 321, 904L, Class 150\u20132500. Ideal for industrial and offshore piping.<\/p>\n","protected":false},"featured_media":4754,"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-2452","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":"\nWelding Neck Flange (WN) | Stainless Steel ANSI\/EN<\/title>\n<meta name=\"description\" content=\"Stainless steel welding neck flanges (DN15\u2013DN3000) for ANSI, EN, and JIS pipelines. 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