{"id":3363,"date":"2026-09-19T22:40:40","date_gmt":"2026-09-19T14:40:40","guid":{"rendered":"https:\/\/abkweldmc.com\/?p=3363"},"modified":"2026-09-19T22:40:42","modified_gmt":"2026-09-19T14:40:42","slug":"asme-b16-5-vs-b16-9-vs-b16-11-vs-b16-34-vs-b16-47-piping-component-standards-comparison-matrix-flanges-butt-welding-fittings-socket-weld-threaded-fittings-valves-and-large-diameter-flanges-select","status":"publish","type":"post","link":"https:\/\/abkweldmc.com\/pt\/3363.html","title":{"rendered":"ASME B16.5 vs B16.9 vs B16.11 vs B16.34 vs B16.47 Piping Component Standards Comparison Matrix: Flanges, Butt-Welding Fittings, Socket-Weld\/Threaded Fittings, Valves, and Large-Diameter Flanges Selection Guide for Refinery, Petrochemical, and Pipeline Fabricators"},"content":{"rendered":"

ASME B16.5 vs B16.9 vs B16.11 vs B16.34 vs B16.47 Piping Component Standards Comparison Matrix: Flanges, Butt-Welding Fittings, Socket-Weld\/Threaded Fittings, Valves, and Large-Diameter Flanges Selection Guide for Refinery, Petrochemical, and Pipeline Fabricators<\/h1>\n

This ASME B16 piping component standards comparison matrix maps the five most-referenced piping component standards \u2014 B16.5 Pipe Flanges and Flanged Fittings + B16.9 Factory-Made Wrought Butt-Welding Fittings + B16.11 Forged Fittings, Socket-Welding and Threaded + B16.34 Valves \u2014 Flanged, Threaded, and Welding End + B16.47 Large Diameter Steel Flanges \u2014 governing the piping component ecosystem in refinery + petrochemical + pipeline + industrial pressure piping. Understanding these five standards + their scope boundaries + material grades + pressure-temperature ratings enables correct piping component specification + procurement + fabrication + certification.<\/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

5 ASME B16 Standards Head-to-Head Overview<\/h2>\n\n\n\n\n\n\n\n\n\n
Standard<\/th>\nFull Title<\/th>\nPrimary Product Scope<\/th>\n<\/tr>\n<\/thead>\n
ASME B16.5<\/strong><\/td>\nPipe Flanges and Flanged Fittings<\/td>\nFlanges NPS 1\/2 through NPS 24; Class 150\/300\/600\/900\/1500\/2500<\/td>\n<\/tr>\n
ASME B16.9<\/strong><\/td>\nFactory-Made Wrought Butt-Welding Fittings<\/td>\nElbows + tees + reducers + caps + laterals NPS 1\/2 through NPS 48<\/td>\n<\/tr>\n
ASME B16.11<\/strong><\/td>\nForged Fittings, Socket-Welding and Threaded<\/td>\nSmall-bore socket-welded + threaded fittings NPS 1\/8 through NPS 4<\/td>\n<\/tr>\n
ASME B16.34<\/strong><\/td>\nValves \u2014 Flanged, Threaded, and Welding End<\/td>\nValves of various types + connection ends; Class 150 through Class 4500<\/td>\n<\/tr>\n
ASME B16.47<\/strong><\/td>\nLarge Diameter Steel Flanges<\/td>\nFlanges NPS 26 through NPS 60; Series A + Series B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pressure-Temperature Rating (Class) System<\/h2>\n
    \n
  • Class 150:<\/strong> Lower pressure rating; typical general service; approximately 285 psig at ambient reducing at higher temperature<\/li>\n
  • Class 300:<\/strong> Medium pressure; approximately 740 psig at ambient<\/li>\n
  • Class 600:<\/strong> Higher pressure; approximately 1480 psig at ambient<\/li>\n
  • Class 900:<\/strong> High pressure; approximately 2220 psig at ambient<\/li>\n
  • Class 1500:<\/strong> Very high pressure; approximately 3705 psig at ambient<\/li>\n
  • Class 2500:<\/strong> Ultra-high pressure; approximately 6170 psig at ambient<\/li>\n
  • Class 4500 (B16.34 only):<\/strong> Extreme high pressure specialty valve applications<\/li>\n<\/ul>\n

    B16.5 vs B16.47 Flange Range Boundary<\/h2>\n
      \n
    • B16.5:<\/strong> NPS 1\/2 through NPS 24 \u2014 covers most pressure piping flange applications<\/li>\n
    • B16.47:<\/strong> NPS 26 through NPS 60 \u2014 covers large-diameter piping typical in tank + pipeline + specialty industrial<\/li>\n
    • B16.47 Series A:<\/strong> Heavier-duty large flange (formerly MSS SP-44 rules)<\/li>\n
    • B16.47 Series B:<\/strong> Lighter-duty large flange (formerly API 605 rules)<\/li>\n
    • Boundary at NPS 24-26:<\/strong> Application specifies which; not interchangeable<\/li>\n<\/ul>\n

      B16.9 Butt-Welding Fittings Types<\/h2>\n
        \n
      • Elbows:<\/strong> 90\u00b0 long\/short radius + 45\u00b0 + specialty angle<\/li>\n
      • Tees:<\/strong> Equal + reducing<\/li>\n
      • Reducers:<\/strong> Concentric + eccentric<\/li>\n
      • Caps:<\/strong> End closure<\/li>\n
      • Laterals + Y-branches:<\/strong> Angular branch connections<\/li>\n
      • Return bends:<\/strong> 180\u00b0 change of direction<\/li>\n<\/ul>\n

        Materials + Grades Common in B16 Standards<\/h2>\n
          \n
        • Carbon steel:<\/strong> A105 (forgings), A234 WPB (fittings), A216 WCB (castings)<\/li>\n
        • Low-alloy steel:<\/strong> A182 F11\/F22\/F91 (forgings), A234 WP11\/WP22\/WP91 (fittings), A217 (castings)<\/li>\n
        • Stainless steel:<\/strong> A182 F304\/F316\/F321\/F347 (forgings), A403 WP304\/WP316 (fittings), A351 (castings)<\/li>\n
        • Nickel alloys:<\/strong> B564 (Inconel\/Hastelloy forgings), B366 (fittings)<\/li>\n
        • Duplex\/super-duplex:<\/strong> A182 F51\/F53\/F55 (forgings), A815 (fittings)<\/li>\n<\/ul>\n

          B16.34 Valve Types<\/h2>\n
            \n
          • Gate valves:<\/strong> Isolation service; full open\/closed operation<\/li>\n
          • Globe valves:<\/strong> Throttling + isolation; better control<\/li>\n
          • Check valves:<\/strong> Non-return; swing + lift + tilting-disc + wafer variants<\/li>\n
          • Ball valves:<\/strong> Quarter-turn isolation; low-pressure-drop<\/li>\n
          • Butterfly valves:<\/strong> Compact quarter-turn; large-diameter service<\/li>\n
          • Plug valves:<\/strong> Quarter-turn plug; specialty applications<\/li>\n<\/ul>\n

            Fabrication Considerations<\/h2>\n
              \n
            • Butt-welding fittings (B16.9):<\/strong> Field-welded to pipe; require WPS + welder qualification per ASME IX + code (B31.1\/3\/etc.)<\/li>\n
            • Socket-weld fittings (B16.11):<\/strong> Small-bore field-welded; less rigorous NDE than butt-welded<\/li>\n
            • Flanged joints (B16.5 + B16.47):<\/strong> Bolted assembly + gasket; no field welding but requires bolted assembly per ASME PCC-1<\/li>\n
            • Valves (B16.34):<\/strong> Field-installed via flanged\/butt-weld\/threaded ends per valve specification<\/li>\n<\/ul>\n

              Wuxi ABK Equipment for B16-Referenced Fabrication<\/h2>\n
                \n
              • Pipe spool fabrication with B16.9 fittings:<\/strong> Cell C pipeline spool configuration per Batch 20 #2 (HGZ + HBJ positioner + orbital TTW + fit-up)<\/li>\n
              • B16.5 flange welding to spool:<\/strong> Same Cell C configuration + specialty flange fixture<\/li>\n
              • Large diameter B16.47 flange to tank\/vessel:<\/strong> HJK heavy rotator + LH-8080\/80150 large-envelope manipulator<\/li>\n
              • B16.34 valve body welding to pipe\/spool:<\/strong> Cell C or Cell A configuration depending on valve size + service<\/li>\n<\/ul>\n

                Common Specification Errors<\/h2>\n
                  \n
                • Wrong Class rating:<\/strong> Under-specified Class results in derating at service temperature; over-specified adds cost + weight<\/li>\n
                • B16.5 vs B16.47 boundary confusion:<\/strong> Ordering B16.5 for NPS 26+ flange fails as standard doesn’t cover; specify B16.47 correctly<\/li>\n
                • Series A vs Series B (B16.47):<\/strong> Not interchangeable; mismatch causes bolt-hole and gasket mismatch<\/li>\n
                • Material grade mismatch to service:<\/strong> Carbon steel A234 WPB in Cr-Mo P91 service unacceptable; PMI (Positive Material Identification) prevents installation mistakes<\/li>\n<\/ul>\n

                  Summary<\/h2>\n

                  ASME B16.5 (Pipe Flanges and Flanged Fittings NPS 1\/2-24) + B16.9 (Factory-Made Wrought Butt-Welding Fittings elbows\/tees\/reducers\/caps NPS 1\/2-48) + B16.11 (Forged Socket-Welding and Threaded Fittings NPS 1\/8-4 small-bore) + B16.34 (Valves \u2014 Flanged, Threaded, Welding End Class 150-4500) + B16.47 (Large Diameter Steel Flanges NPS 26-60 Series A\/B) comparison matrix. Class system 150\/300\/600\/900\/1500\/2500\/4500 pressure ratings with temperature derating. B16.5-B16.47 boundary at NPS 24\/26. B16.47 Series A (heavier MSS SP-44 heritage) vs Series B (lighter API 605 heritage) not interchangeable. B16.9 fittings types (elbows + tees + reducers + caps + laterals + return bends). Materials A105 + A234 WPB\/WP11\/WP22\/WP91 + F304\/F316 stainless + Inconel\/Hastelloy B564\/B366 + duplex F51\/F53\/F55. B16.34 valve types (gate + globe + check + ball + butterfly + plug). Fabrication considerations (butt-welded field-welded WPS ASME IX; socket-welded small-bore; flanged bolted assembly ASME PCC-1; valve installation per valve spec). Common specification errors (wrong Class + boundary confusion + Series mismatch + material grade mismatch). Wuxi ABK Machinery equipment<\/strong> Cell C pipeline spool + HJK heavy rotator + LH large-envelope manipulator supports B16.5\/9\/11\/34\/47 fabrication + certification for refinery + petrochemical + pipeline + industrial pressure piping.<\/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: 2026-07-24.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

                  This matrix compares ASME B16.5 flanges, B16.9 butt-welding fittings, B16.11 socket\/threaded forged fittings, B16.34 valves and B16.47 large-diameter flanges across NPS scope, Class 150\u20134500 ratings, material grades and fabrication rules, with guidance on B16.5\/B16.47 boundaries, Series A\/B selection and Wuxi ABK Cell C\/HJK\/LH automation for spool, flange and valve-body welding.<\/p>\n","protected":false},"author":1,"featured_media":3364,"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":[440,583,584,588,582,586,587,591,585,592,590,567,589,150],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"pt","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\/pt\/wp-json\/wp\/v2\/posts\/3363"}],"collection":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/comments?post=3363"}],"version-history":[{"count":1,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts\/3363\/revisions"}],"predecessor-version":[{"id":3365,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/posts\/3363\/revisions\/3365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/media\/3364"}],"wp:attachment":[{"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/media?parent=3363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/categories?post=3363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abkweldmc.com\/pt\/wp-json\/wp\/v2\/tags?post=3363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}