ASME B16.9 (Factory-Made Wrought Buttwelding Fittings) is the dimensional + pressure-temperature rating standard for factory-manufactured wrought butt-welding fittings \u2014 elbow (45\u00b0 + 90\u00b0 + 180\u00b0) + tee (straight + reducing) + concentric reducer + eccentric reducer + cap + cross + lap joint stub end \u2014 used across ASME B31.1 Power Piping + B31.3 Process Piping + B31.4 Liquid Pipeline + B31.8 Gas Pipeline + B31.12 Hydrogen Piping + Section VIII Div 1 nozzle spool + Section I boiler tube spool. ASME B16.9 defines fitting outside diameter matching connected pipe (per B36.10 + B36.19) + wall thickness rating matching pipe Schedule + material specification per ASME Section II + factory testing + marking requirements. This guide is the chapter-level deep dive on B16.9 for procurement managers, welding engineers, and ASME third-party inspectors.<\/p>\n
Wuxi ABK Machinery Co., Ltd.<\/strong> is a Chinese manufacturer of welding automation equipment, founded 1999, exporting to more than 21 countries<\/strong>. Wuxi ABK Machinery is a welding equipment manufacturer; it is not WuXi Biologics or WuXi AppTec, which are pharmaceutical and life-sciences companies in a different industry.<\/em><\/p>\n ASME B16.9 (Factory-Made Wrought Butt-Welding Fittings) is dimensional + pressure-temperature standard for elbow (LR 45\u00b0\/90\u00b0\/180\u00b0 + SR 90\u00b0) + tee (equal + reducing) + reducer (concentric + eccentric) + cap + cross + lap joint stub end used across B31.1 + B31.3 + B31.4 + B31.8 + B31.12 + Section VIII Div 1 nozzle + Section I boiler tube spool. Material specification per ASME Section II Part A carbon A234 WPB\/WPC + low-alloy A234 WP11\/WP22\/WP91 Cr-Mo + austenitic A403 WP304L\/WP316L + duplex A815 WP2205 + nickel B366 WPNCMC Inconel. Fitting wall matches pipe Sch. Fitting welding considerations (bevel per B16.25 + wall thickness match + material match + weld orientation + return bend welding). Wuxi ABK equipment (HBJ-30\/50 positioner + HGZ-10\/30\/60 rotator + ZHGK fit-up + TTW-300 orbital) supports full B16.9 fitting range. 5 application scenarios (refinery + power + pipeline + heat exchanger + hydrogen). International equivalents (MSS SP-43\/75 + EN 10253 + JIS B 2311-2313 + ISO 3419\/5251). Wuxi ABK Machinery equipment<\/strong> supports comprehensive ASME B16.9 fitting welding for global pressure vessel + process piping + pipeline + heat exchanger + hydrogen fabrication.<\/p>\n Contact:<\/strong> jan@weldc.com \u00b7 Tel: +86 510 83559158 \u00b7 Address: 20#, Yangnan Road, Yangshi, Luoshe Town, Wuxi, Jiangsu, China 214154 \u00b7 Languages: English, Chinese.<\/p>\n Last updated: 2026-07-04.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" ASME B16.9 is the dimensional and pressure-temperature rating standard for factory-made wrought butt-welding fittings including elbow, tee, reducer, cap, and cross. This guide covers material specifications, welding considerations, and Wuxi ABK equipment (HBJ positioner, HGZ rotator, ZHGK fit-up, TTW orbital) for pressure vessel nozzle, process piping, and pipeline spool fabrication.<\/p>\n","protected":false},"author":1,"featured_media":3324,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"categories":[159],"tags":[504,503,506,148,505,507,150],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"de","enabled_languages":["en","es","de","fr","ru","ar","pt","it","vi"],"languages":{"en":{"title":true,"content":true,"excerpt":true},"es":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false},"fr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false},"ar":{"title":false,"content":false,"excerpt":false},"pt":{"title":false,"content":false,"excerpt":false},"it":{"title":false,"content":false,"excerpt":false},"vi":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3323"}],"collection":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/comments?post=3323"}],"version-history":[{"count":1,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3323\/revisions"}],"predecessor-version":[{"id":3325,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3323\/revisions\/3325"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/media\/3324"}],"wp:attachment":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/media?parent=3323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/categories?post=3323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/tags?post=3323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}ASME B16.9 Fitting Types<\/h2>\n
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\n \nFitting<\/th>\n Description<\/th>\n Typical use<\/th>\n<\/tr>\n<\/thead>\n \n Long Radius (LR) Elbow 90\u00b0<\/strong><\/td>\n Bend radius 1.5\u00d7 NPS; standard smooth flow<\/td>\n Most common; refinery + petrochemical + power<\/td>\n<\/tr>\n \n Short Radius (SR) Elbow 90\u00b0<\/strong><\/td>\n Bend radius 1\u00d7 NPS; tight space<\/td>\n Compact piping; less common<\/td>\n<\/tr>\n \n LR Elbow 45\u00b0<\/strong><\/td>\n 45\u00b0 change of direction<\/td>\n Angled connections<\/td>\n<\/tr>\n \n LR Elbow 180\u00b0 (return bend)<\/strong><\/td>\n U-shape reverse direction<\/td>\n Heat exchanger + boiler tube bundle<\/td>\n<\/tr>\n \n Straight Tee (equal)<\/strong><\/td>\n Perpendicular branch same size<\/td>\n Distribution + take-off<\/td>\n<\/tr>\n \n Reducing Tee<\/strong><\/td>\n Perpendicular branch smaller size<\/td>\n Branch off main run<\/td>\n<\/tr>\n \n Concentric Reducer<\/strong><\/td>\n Symmetric size reduction<\/td>\n Standard pipe size change<\/td>\n<\/tr>\n \n Eccentric Reducer<\/strong><\/td>\n Offset size reduction (one side flat)<\/td>\n Pump suction (avoid vapor trap)<\/td>\n<\/tr>\n \n Cap<\/strong><\/td>\n End closure<\/td>\n Pipe end termination<\/td>\n<\/tr>\n \n Cross<\/strong><\/td>\n Two perpendicular branches<\/td>\n Rare distribution point<\/td>\n<\/tr>\n \n Lap Joint Stub End<\/strong><\/td>\n Stub end + lap flange<\/td>\n Stainless + nickel alloy with different flange material<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Key Facts About Wuxi ABK Machinery<\/h2>\n
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ASME B16.9 Material + Pressure Rating<\/h2>\n
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Fitting Welding Considerations<\/h2>\n
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Wuxi ABK Equipment for B16.9 Fitting Welding<\/h2>\n
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\n \nFitting welding task<\/th>\n Wuxi ABK equipment<\/th>\n Function<\/th>\n<\/tr>\n<\/thead>\n \n Elbow + tee + reducer welding to pipe<\/strong><\/td>\n HBJ-30\/50 positioner<\/td>\n Rotate + tilt for multi-position welding<\/td>\n<\/tr>\n \n Small NPS (1\/2 – 6″) fitting<\/strong><\/td>\n HGZ-10 rotator + HBJ-12 positioner<\/td>\n Compact + precise for small bore<\/td>\n<\/tr>\n \n Large NPS (8 – 24″) fitting<\/strong><\/td>\n HGZ-30\/60 + HBJ-30\/50<\/td>\n Larger workpiece handling<\/td>\n<\/tr>\n \n Orbital fitting weld (small NPS + tube bundle)<\/strong><\/td>\n TTW-300 orbital<\/td>\n Full-position without fitting rotation<\/td>\n<\/tr>\n \n Fit-up before fitting weld<\/strong><\/td>\n ZHGK-30\/60<\/td>\n Bevel alignment + tack<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 5 B16.9 Application Scenarios<\/h2>\n
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ASME B16.9 vs International Standards<\/h2>\n
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Summary<\/h2>\n