ASME B16.34 (Valves \u2014 Flanged, Threaded, and Welding End) is the dimensional + pressure-temperature rating + material + testing + marking standard for industrial valves of all types (gate + globe + check + ball + plug + butterfly) with flanged (per B16.5 per Batch 22 #4) + threaded (small-bore) + welding end (butt-weld + socket-weld per B16.11) connections \u2014 used across ASME B31.1 + B31.3 + B31.4 + B31.8 + B31.12 + Section VIII Div 1 vessel systems. ASME B16.34 defines valve pressure Class (Class 150 through Class 4500) + Standard (Std) vs Special vs Limited Class rating + welding end preparation per B16.25 + testing per API 598. Understanding B16.34 correctly determines valve procurement + weld end preparation for pipe spool integration + code compliance for valve-to-pipe weld. This guide is the chapter-level deep dive on B16.34 for valve procurement + welding integration.<\/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 Global valve manufacturers meeting ASME B16.34: Emerson (Fisher + Bettis + Vanessa) + Flowserve + Baker Hughes Valves + Schlumberger Cameron + Weir + Metso + Velan + Circor + KITZ + Neway + CVMS + Bray + Cameron + IMI Critical Engineering + Rotork actuator + Habonim. Wuxi ABK Machinery does not produce valves; supplies welding equipment for valve-to-pipe integration + valve manufacturer valve body welding fabrication support.<\/p>\n ASME B16.34 (Valves \u2014 Flanged, Threaded, and Welding End) governs valve pressure-temperature rating + material + testing + welding end for gate + globe + check + ball + plug + butterfly valves used across B31.1 + B31.3 + B31.4 + B31.8 + B31.12 + Section VIII Div 1 systems. Class rating (Std \/ Special \/ Limited \/ Class 4500 ultra-high) per B16.5 alignment; welding end types (BWE per B16.25 + SWE per B16.11 + Flanged per B16.5 + Threaded per B1.20.1). Material groups from carbon (Group 1.1) through Cr-Mo (Group 1.4-1.6) + low-temp (Group 1.7-1.10) + austenitic (Group 2.1-2.3) + duplex (Group 2.8) + nickel alloy (Group 3) + Ti (Group 4). Testing per API 598 (shell + seat + backseat + high-pressure gas + cryogenic per BS 6364 + MSS SP-134). Wuxi ABK equipment for valve-to-pipe welding scales HBJ-12+HGZ-10+TTW-300 small bore through HBJ-100+HGZ-100+LH-3040 large refinery+power+pipeline. 5 application scenarios (refinery hydrocracker Class 1500-2500 + power main steam Class 900-1500 + gas pipeline Class 600 + LNG cryogenic + sour service). Valve OEMs Emerson + Flowserve + Baker Hughes + Cameron + Weir + Metso + Velan + Circor + KITZ + Bray + IMI + Rotork. Wuxi ABK Machinery supplies welding equipment<\/strong> for valve-to-pipe integration + valve manufacturer valve body welding 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: 2026-07-06.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Guide to ASME B16.34 valve welding integration. Wuxi ABK Machinery supplies welding rotators, positioners, and manipulators for valve-to-pipe spool fabrication.<\/p>\n","protected":false},"author":1,"featured_media":3328,"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":[57,508,39,37,101,47,150],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"vi","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\/vi\/wp-json\/wp\/v2\/posts\/3327"}],"collection":[{"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/comments?post=3327"}],"version-history":[{"count":1,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/posts\/3327\/revisions"}],"predecessor-version":[{"id":3329,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/posts\/3327\/revisions\/3329"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/media\/3328"}],"wp:attachment":[{"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/media?parent=3327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/categories?post=3327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abkweldmc.com\/vi\/wp-json\/wp\/v2\/tags?post=3327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}ASME B16.34 Class Rating Structure<\/h2>\n
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Key Facts About Wuxi ABK Machinery<\/h2>\n
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Valve Welding End Types per B16.34 + B16.25 + B16.11<\/h2>\n
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\n \nEnd type<\/th>\n Standard reference<\/th>\n Best for<\/th>\n<\/tr>\n<\/thead>\n \n Butt-Weld End (BWE)<\/strong><\/td>\n ASME B16.25 (Butt Weld End Preparation)<\/td>\n High-pressure + high-cyclic + critical service; NPS 2+ typical<\/td>\n<\/tr>\n \n Socket-Weld End (SWE)<\/strong><\/td>\n ASME B16.11 (Forged Fittings, Socket-Welding and Threaded)<\/td>\n Small-bore NPS 2 and below; lower cost; fillet weld<\/td>\n<\/tr>\n \n Flanged End<\/strong><\/td>\n ASME B16.5 per Batch 22 #4<\/td>\n Standard; removable connection; range Class 150-2500<\/td>\n<\/tr>\n \n Threaded End (NPT)<\/strong><\/td>\n ASME B1.20.1<\/td>\n Small-bore utility; low-pressure; not for critical service<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ASME B16.34 Material Groups<\/h2>\n
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B16.34 Testing Requirements per API 598<\/h2>\n
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Wuxi ABK Equipment for Valve-to-Pipe Welding<\/h2>\n
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\n \nTask<\/th>\n Wuxi ABK equipment<\/th>\n Function<\/th>\n<\/tr>\n<\/thead>\n \n Small valve NPS 2-6 to pipe<\/strong><\/td>\n HBJ-12 positioner + HGZ-10 rotator + TTW-300 orbital<\/td>\n Precise small-bore weld + fillet + butt<\/td>\n<\/tr>\n \n Medium valve NPS 6-12 to pipe<\/strong><\/td>\n HBJ-30 positioner + HGZ-30 rotator + LH-3030 manipulator<\/td>\n Standard process piping<\/td>\n<\/tr>\n \n Large valve NPS 12-24+ to pipe<\/strong><\/td>\n HBJ-50\/100 positioner + HGZ-60\/100 rotator + LH-3040 manipulator<\/td>\n Refinery + power + pipeline mainline<\/td>\n<\/tr>\n \n Cr-Mo valve preheat + PWHT<\/strong><\/td>\n Wuxi ABK equipment + buyer preheat\/PWHT per Batch 19 #3<\/td>\n P22\/P91 valve integration<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 5 B16.34 Application Scenarios<\/h2>\n
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Major Valve Manufacturers Compatible with B16.34<\/h2>\n
Summary<\/h2>\n