- \n
- Superior stress distribution at weld joint<\/li>\n
- Reduced stress concentration<\/li>\n
- Ideal for high pressure and temperature<\/li>\n
- Excellent for cyclic loading conditions<\/li>\n
- Full penetration weld provides leak-proof connection<\/li>\n<\/ul>\n
Applications:<\/strong> Refineries, power plants, offshore platforms, high-pressure process lines<\/p>\n
Slip-On Flanges<\/h3>\n
Slip-on flanges slide over the pipe and are welded both inside and outside. They’re cost-effective for lower-pressure applications.<\/p>\n
Advantages:<\/strong><\/p>\n
- \n
- Lower initial cost than weld neck<\/li>\n
- Easier alignment during installation<\/li>\n
- Shorter lead time<\/li>\n
- Sufficient for most general service<\/li>\n<\/ul>\n
Applications:<\/strong> Water systems, low-pressure process lines, utility piping<\/p>\n
Socket Weld Flanges<\/h3>\n
Socket weld flanges have a recessed bore for pipe insertion and a single external fillet weld. Used primarily for small-diameter piping.<\/p>\n
Applications:<\/strong> Instrument lines, hydraulic systems, small-bore high-pressure piping<\/p>\n
Threaded Flanges<\/h3>\n
Threaded flanges have internal NPT threads for screw-on installation without welding.<\/p>\n
Advantages:<\/strong><\/p>\n
- \n
- No welding required<\/li>\n
- Quick installation and removal<\/li>\n
- Ideal for explosive environments<\/li>\n<\/ul>\n
Applications:<\/strong> Low-pressure water, air, gas lines; instrument connections<\/p>\n
Lap Joint Flanges<\/h3>\n
Lap joint flanges are used with stub ends. The flange rotates freely around the pipe, facilitating bolt hole alignment.<\/p>\n
Applications:<\/strong> Piping requiring frequent maintenance, lined pipe systems<\/p>\n
Blind Flanges<\/h3>\n
Blind flanges close off pipe ends, valve openings, or pressure vessel nozzles. They have no bore center.<\/p>\n
Flange Face Types<\/h2>\n
Raised Face (RF)<\/h3>\n
The most common face type. The raised portion concentrates gasket pressure for better sealing.<\/p>\n
Flat Face (FF)<\/h3>\n
Entire face is flat, used with flat gaskets. Required when mating with cast iron equipment.<\/p>\n
Ring Type Joint (RTJ)<\/h3>\n
RTJ flanges have a groove for metal ring gaskets. Used for high-pressure, high-temperature service.<\/p>\n
Flange Standards<\/h2>\n
ASME B16.5<\/h3>\n
The North American standard for pipe flanges and flanged fittings.<\/p>\n
- \n
- Size range: 1\/2″ to 24″<\/li>\n
- Pressure classes: 150, 300, 400, 600, 900, 1500, 2500<\/li>\n<\/ul>\n
DIN\/EN Standards<\/h3>\n
- \n
- DIN 2501 \/ EN 1092-1:<\/strong> European flange standard<\/li>\n
- PN ratings: PN6, PN10, PN16, PN25, PN40<\/li>\n<\/ul>\n
JIS B2220<\/h3>\n
Japanese Industrial Standard for flanges.<\/p>\n
- \n
- 5K, 10K, 16K, 20K, 30K ratings<\/li>\n<\/ul>\n
GB\/T Standards<\/h3>\n
Chinese national standards for flanges.<\/p>\n
- \n
- GB\/T 9112-9124:<\/strong> Steel pipe flanges<\/li>\n<\/ul>\n
Material Selection Guide<\/h2>\n
Carbon Steel<\/h3>\n
- \n
- A105:<\/strong> Forged carbon steel, most common<\/li>\n
- A350 LF2:<\/strong> Low-temperature service<\/li>\n<\/ul>\n
Stainless Steel<\/h3>\n
- \n
- A182 F304\/F304L:<\/strong> General corrosion resistance<\/li>\n
- A182 F316\/F316L:<\/strong> Marine and chemical service<\/li>\n<\/ul>\n
Conclusion<\/h2>\n
Selecting the right flange type ensures safe, reliable, and maintainable piping systems. Consider pressure, temperature, fluid properties, maintenance requirements, and applicable codes when making your selection.<\/p>\n
Songhai Flange manufactures all flange types in carbon steel, stainless steel, alloy steel, and special materials. Our ISO 9001:2008 certified facility ensures consistent quality and full traceability.
\nWhatsApp:<\/strong>\u00a0+86-18658777855
\nEmail:<\/strong>\u00a01007788887@qq.com
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<\/a><\/p>","protected":false},"excerpt":{"rendered":"Complete guide to industrial flange types including weld neck, slip-on, socket weld, threaded, and lap joint flanges with selection criteria.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[214],"tags":[122,142,103,231,156,233,232],"class_list":["post-1623","post","type-post","status-publish","format-standard","hentry","category-technical-guide","tag-asme-b16-5","tag-flange-selection","tag-flange-types","tag-industrial-flanges","tag-pipe-flanges","tag-slip-on-flange","tag-weld-neck-flange"],"_links":{"self":[{"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/posts\/1623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/comments?post=1623"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/posts\/1623\/revisions"}],"predecessor-version":[{"id":1638,"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/posts\/1623\/revisions\/1638"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/media?parent=1623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/categories?post=1623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflanges.com\/ms\/wp-json\/wp\/v2\/tags?post=1623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- A182 F316\/F316L:<\/strong> Marine and chemical service<\/li>\n<\/ul>\n
- A350 LF2:<\/strong> Low-temperature service<\/li>\n<\/ul>\n
- A105:<\/strong> Forged carbon steel, most common<\/li>\n
- GB\/T 9112-9124:<\/strong> Steel pipe flanges<\/li>\n<\/ul>\n
- PN ratings: PN6, PN10, PN16, PN25, PN40<\/li>\n<\/ul>\n
- DIN 2501 \/ EN 1092-1:<\/strong> European flange standard<\/li>\n