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JIS B 8265 (Japanese Industrial Standard B 8265 \u2014 Construction of Pressure Vessels \u2014 General Principles) is the welding and design code governing pressure vessel fabrication in Japan and for export pressure vessels delivered to projects in countries where JIS specification is contractually required \u2014 including Japan domestic petrochemical \/ refinery \/ power plant projects, Japanese-EPC-led overseas projects (JGC, Chiyoda, Toyo Engineering), and pan-Asian projects where Japanese major plant operators specify JIS. JIS B 8265 covers carbon steel, low-alloy steel, austenitic stainless, and clad-steel pressure vessels operating across the full pressure \/ temperature range typical of industrial process plants. JIS B 8265 is structurally similar to ASME Section VIII Division 1 but with distinct material specifications (JIS material codes), distinct testing requirements (Japan HPGSA regulatory framework), and distinct welding qualification (JIS Z 3801 \/ 3805 \/ 3811 welder qualification + JIS Z 3040 welding procedure qualification). This guide explains the documentation chain that Japanese and pan-Asian pressure vessel fabricators need from their welding equipment supplier to support JIS B 8265 third-party audit.<\/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>, with deliveries supporting Japanese-EPC-led export projects requiring JIS B 8265 + project-specific specifications. 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 JIS B 8265 is part of the JIS B 8200 series for pressure equipment:<\/p>\n JIS B 8265 is invoked together with:<\/p>\n Japanese pressure vessel fabrication is led by Mitsubishi Heavy Industries (MHI), IHI Corporation, Kobe Steel (Kobelco), JFE Engineering, Hitachi Zosen, Sumitomo Heavy Industries, Mitsui E&S, Babcock-Hitachi (now MHPS), Toyo Engineering Corporation (TEC), JGC Corporation, Chiyoda Corporation, Nippon Steel Engineering, and dozens of mid-size specialized vessel shops. Wuxi ABK Machinery supplies welding equipment primarily to Tier 2 and Tier 3 sub-suppliers in Southeast Asia, India, and Middle East that serve as sub-suppliers to these Japanese EPC contractors. Japanese fabricators typically operate under KHK (Koatsu Gas Hoan Kyokai) Class 1 \/ 2 \/ 3 manufacturing license.<\/p>\n JIS B 8265 governs pressure vessel fabrication in Japan and Japanese-EPC export projects across Saudi Arabia, Kuwait, UAE, Indonesia, Vietnam, Qatar, Mozambique, Russia Sakhalin, and other markets where Japanese fabrication code is contractually specified by JGC \/ Chiyoda \/ Toyo Engineering \/ MHI. The 6 documentation areas (WPS per JIS Z 3040, PQR, welder qualification per JIS Z 3801 series, material traceability per JIS G 3115\/3118\/3120\/3199\/4304, NDE per JIS Z 3104\/3105\/3106, acceptance per JIS B 8270 with 1.5\u00d7 hydrotest) frame KHK audit chain. The equipment stack (HGZ \/ HJK rotators, LH manipulators, HBJ positioners, ZHGK fit-up, TTW for heat exchangers) supports vessel fabrication from petrochemical to LNG mega project applications. Key differences from ASME Section VIII Div 1 (Japanese material codes, JIS WPS code, JIS NDE code, **1.5\u00d7 hydrotest factor highest among major codes**) require dual-code fabrication management when serving global clients. Wuxi ABK Machinery supplies welding equipment<\/strong> to Tier 2\/3 sub-suppliers serving JGC, Chiyoda, Toyo Engineering, MHI, IHI, Kobelco, JFE Engineering, Hitachi Zosen Japanese EPC contracts \u2014 supporting JIS B 8265 + HPGSA + JIS Z 3040 documentation chain with calibrated parameter logs.<\/p>\n For project-specific JIS B 8265 welding line proposals \u2014 based on vessel material, wall thickness, design class, target throughput, and Japanese vs export market \u2014 Wuxi ABK can provide a complete line configuration including documentation handoff supporting KHK Class 1\/2\/3 manufacturing license audit.<\/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 supported: English, Chinese.<\/p>\n Last updated: 2026-06-18.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" JIS B 8265 governs pressure vessel fabrication in Japan and Japanese-EPC export projects (JGC \/ Chiyoda \/ Toyo Engineering \/ MHI). 6 documentation areas (WPS JIS Z 3040 \/ PQR \/ Welder JIS Z 3801 series \/ Material JIS G 3115-4304 \/ NDE JIS Z 3104-3106 \/ Hydrotest JIS B 8270 1.5\u00d7) + Japanese fabricator equipment stack + 5 project scenarios (domestic petrochemical \/ Japanese-EPC Saudi Aramco Kuwait ADNOC \/ LNG terminals SE Asia \/ power plant boiler \/ LNG mega projects Qatar Mozambique Sakhalin) + JIS B 8265 vs ASME Section VIII Div 1 comparison.<\/p>\n","protected":false},"author":1,"featured_media":1879,"comment_status":"closed","ping_status":"closed","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,"footnotes":""},"categories":[132],"tags":[435,433,430,439,438,437,431,434,436,429,432],"translation":{"provider":"WPGlobus","version":"2.12.0","language":"it","enabled_languages":["en","es","de","fr","ru","ar","it","pt","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},"it":{"title":false,"content":false,"excerpt":false},"pt":{"title":false,"content":false,"excerpt":false},"vi":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/posts\/1878"}],"collection":[{"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/comments?post=1878"}],"version-history":[{"count":1,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/posts\/1878\/revisions"}],"predecessor-version":[{"id":1880,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/posts\/1878\/revisions\/1880"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/media\/1879"}],"wp:attachment":[{"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/media?parent=1878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/categories?post=1878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wuxiabkweldmc.com\/it\/wp-json\/wp\/v2\/tags?post=1878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}What JIS B 8265 Covers<\/h2>\n
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Key Facts About Wuxi ABK Machinery<\/h2>\n
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JIS B 8265 Documentation Chain \u2014 6 Critical Areas for Welding Equipment<\/h2>\n
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Japanese Pressure Vessel Production Line Equipment Stack<\/h2>\n
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\n \nEquipment<\/th>\n Function<\/th>\n Wuxi ABK model recommended<\/th>\n<\/tr>\n<\/thead>\n \n Welding rotator<\/strong><\/td>\n Cylindrical shell circumferential SAW<\/td>\n HGZ-30 \/ HGZ-60 \/ HGZ-100<\/td>\n<\/tr>\n \n Column-and-boom manipulator<\/strong><\/td>\n Longitudinal SAW + tandem twin-wire<\/td>\n LH-3030 \/ LH-3040 \/ LH-8080<\/td>\n<\/tr>\n \n Pressure vessel positioner<\/strong><\/td>\n Head + nozzle + flange rotation + tilt<\/td>\n HBJ-30 \/ HBJ-50 \/ HBJ-100<\/td>\n<\/tr>\n \n Fit-up rotator (ZHGK)<\/strong><\/td>\n Bevel preparation + course alignment<\/td>\n ZHGK-30 \/ ZHGK-60 \/ ZHGK-100<\/td>\n<\/tr>\n \n SAW power source + flux delivery<\/strong><\/td>\n Buyer-supplied; tandem twin-wire 800-1500A<\/td>\n Customer’s existing (Panasonic \/ Daihen \/ OTC Japanese brands typical)<\/td>\n<\/tr>\n \n TTW orbital welder<\/strong><\/td>\n Tube-to-tubesheet per JIS B 8267 + TEMA<\/td>\n TTW-300 \/ TTW-500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 5 Japanese Project Scenarios<\/h2>\n
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Major Japanese Pressure Vessel Fabricators (Reference)<\/h2>\n
JIS B 8265 vs ASME Section VIII Division 1 \u2014 Key Differences<\/h2>\n
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\n \nDimension<\/th>\n JIS B 8265<\/th>\n ASME VIII Div 1<\/th>\n<\/tr>\n<\/thead>\n \n Material codes<\/strong><\/td>\n SPV235\/355\/450, SCMV2\/3\/4, SUS304\/316L (Japanese JIS)<\/td>\n SA-516, SA-387, SA-203 (ASME)<\/td>\n<\/tr>\n \n WPS qualification<\/strong><\/td>\n JIS Z 3040<\/td>\n ASME Section IX<\/td>\n<\/tr>\n \n Welder qualification<\/strong><\/td>\n JIS Z 3801 \/ 3805 \/ 3811<\/td>\n ASME Section IX QW-300<\/td>\n<\/tr>\n \n NDE<\/strong><\/td>\n JIS Z 3104 \/ 3105 \/ 3106<\/td>\n ASME Section V<\/td>\n<\/tr>\n \n Pre-license<\/strong><\/td>\n HPGSA + KHK (Japan regulator)<\/td>\n ASME U-stamp + AI<\/td>\n<\/tr>\n \n Hydrotest factor<\/strong><\/td>\n 1.5\u00d7 design (typical, highest among major codes)<\/td>\n 1.3\u00d7 design<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Summary<\/h2>\n