{"id":3318,"date":"2026-09-08T20:46:40","date_gmt":"2026-09-08T12:46:40","guid":{"rendered":"https:\/\/abkweldmc.com\/?p=3318"},"modified":"2026-09-08T20:46:41","modified_gmt":"2026-09-08T12:46:41","slug":"asme-b36-10-b36-19-pipe-dimensions-standards-nominal-pipe-size-schedule-and-wall-thickness-reference-for-carbon-steel-and-stainless-steel-pipe-spool-fabrication","status":"publish","type":"post","link":"https:\/\/abkweldmc.com\/de\/3318.html","title":{"rendered":"ASME B36.10 + B36.19 Pipe Dimensions Standards: Nominal Pipe Size, Schedule, and Wall Thickness Reference for Carbon Steel and Stainless Steel Pipe Spool Fabrication"},"content":{"rendered":"

ASME B36.10 + B36.19 Pipe Dimensions Standards: Nominal Pipe Size, Schedule, and Wall Thickness Reference for Carbon Steel and Stainless Steel Pipe Spool Fabrication<\/h1>\n

ASME B36.10 (Welded and Seamless Wrought Steel Pipe) + ASME B36.19 (Stainless Steel Pipe) are the dimensional standards governing pipe outside diameter (OD) + wall thickness (Schedule) + Nominal Pipe Size (NPS) designation for carbon steel + low-alloy steel (B36.10) and stainless steel (B36.19) pipe used in 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 pressure vessel nozzles + Section I boiler tube. Understanding B36.10 + B36.19 correctly determines pipe procurement + wall thickness selection + wall thickness calculation compliance + pipe spool fabrication cost + code audit + interoperability with international standards (ISO 4200 + EN 10220 + DIN 2448). This guide is the chapter-level deep dive on B36.10 + B36.19 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

Nominal Pipe Size (NPS) Concept<\/h2>\n

NPS is North American pipe designation \u2014 historically related to inside diameter but modern NPS is a NOMINAL designation NOT actual dimension. For NPS \u2264 12″, OD is fixed regardless of Schedule (wall thickness only varies inward). For NPS \u2265 14″, OD equals NPS in inches \u00d7 25.4 mm.<\/p>\n

ASME B36.10 Common Carbon Steel Pipe Sizes<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
NPS<\/th>\nOD (mm)<\/th>\nSchedule 40 wall (mm)<\/th>\nSchedule 80 wall (mm)<\/th>\nSchedule 160 wall (mm)<\/th>\n<\/tr>\n<\/thead>\n
NPS 1\/2<\/strong><\/td>\n21.3<\/td>\n2.77<\/td>\n3.73<\/td>\n4.78<\/td>\n<\/tr>\n
NPS 1<\/strong><\/td>\n33.4<\/td>\n3.38<\/td>\n4.55<\/td>\n6.35<\/td>\n<\/tr>\n
NPS 2<\/strong><\/td>\n60.3<\/td>\n3.91<\/td>\n5.54<\/td>\n8.74<\/td>\n<\/tr>\n
NPS 4<\/strong><\/td>\n114.3<\/td>\n6.02<\/td>\n8.56<\/td>\n13.49<\/td>\n<\/tr>\n
NPS 6<\/strong><\/td>\n168.3<\/td>\n7.11<\/td>\n10.97<\/td>\n18.26<\/td>\n<\/tr>\n
NPS 8<\/strong><\/td>\n219.1<\/td>\n8.18<\/td>\n12.70<\/td>\n23.01<\/td>\n<\/tr>\n
NPS 10<\/strong><\/td>\n273.1<\/td>\n9.27<\/td>\n15.09<\/td>\n28.58<\/td>\n<\/tr>\n
NPS 12<\/strong><\/td>\n323.9<\/td>\n10.31<\/td>\n17.48<\/td>\n33.32<\/td>\n<\/tr>\n
NPS 14<\/strong><\/td>\n355.6<\/td>\n11.13<\/td>\n19.05<\/td>\n35.71<\/td>\n<\/tr>\n
NPS 16<\/strong><\/td>\n406.4<\/td>\n12.70<\/td>\n21.44<\/td>\n40.49<\/td>\n<\/tr>\n
NPS 20<\/strong><\/td>\n508.0<\/td>\n15.09<\/td>\n26.19<\/td>\n50.01<\/td>\n<\/tr>\n
NPS 24<\/strong><\/td>\n609.6<\/td>\n17.48<\/td>\n30.96<\/td>\n59.54<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Schedule Designation System<\/h2>\n
    \n
  • Schedule 5S \/ 10S \/ 40S \/ 80S:<\/strong> Stainless steel per B36.19 (S suffix); typically thinner walls than carbon steel for corrosion service.<\/li>\n
  • Schedule 10 \/ 20 \/ 30 \/ 40 (STD) \/ 60 \/ 80 (XS) \/ 100 \/ 120 \/ 140 \/ 160 \/ XXS:<\/strong> Carbon steel per B36.10; STD = Standard = Schedule 40 for smaller NPS; XS = Extra Strong = Schedule 80 for smaller NPS.<\/li>\n
  • XXS (Double Extra Strong):<\/strong> Heaviest carbon steel wall; different from Schedule 160 for larger NPS.<\/li>\n<\/ul>\n

    Key Facts About Wuxi ABK Machinery<\/h2>\n
      \n
    • Founded:<\/strong> 1999 \u2014 25+ years<\/li>\n
    • Facility:<\/strong> 4,500 m\u00b2 owned plant in Wuxi, Jiangsu, China<\/li>\n
    • ASME B36.10 + B36.19 support:<\/strong> Wuxi ABK pipe spool welding equipment supports full NPS 1\/2 through 24″ range per B36.10 + B36.19 dimensional standards<\/li>\n
    • Certifications:<\/strong> CE Marking; SGS available; 12\/24-month warranty<\/li>\n<\/ul>\n

      B36.19 Stainless Steel Pipe \u2014 Key Differences from B36.10<\/h2>\n
        \n
      • Same OD as B36.10:<\/strong> Stainless pipe OD matches carbon steel for interchangeability of fittings + flanges.<\/li>\n
      • Thinner walls (Schedule S):<\/strong> Corrosion resistance replaces wall thickness need; Schedule 10S + 40S common vs Schedule 40 + 80 carbon.<\/li>\n
      • Common materials:<\/strong> A312 TP304L + TP316L + TP321 + TP347 austenitic; A790 UNS S31803 duplex; A312 TP2205 duplex.<\/li>\n
      • Wall thickness range:<\/strong> Schedule 5S (thinnest) through Schedule 80S; typically 1\/3 to 1\/2 wall of equivalent carbon Schedule.<\/li>\n<\/ul>\n

        Wuxi ABK Pipe Spool Equipment by NPS Range<\/h2>\n\n\n\n\n\n\n\n\n
        NPS range<\/th>\nWuxi ABK rotator<\/th>\nApplication<\/th>\n<\/tr>\n<\/thead>\n
        NPS 1\/2 – 4<\/strong><\/td>\nHGZ-10 (1 t)<\/td>\nInstrumentation + small process<\/td>\n<\/tr>\n
        NPS 4 – 12<\/strong><\/td>\nHGZ-30 (3 t)<\/td>\nStandard process piping + Cr-Mo<\/td>\n<\/tr>\n
        NPS 12 – 24<\/strong><\/td>\nHGZ-60 (6 t) \/ HGZ-100 (10 t)<\/td>\nRefinery + power plant + gas pipeline<\/td>\n<\/tr>\n
        NPS 24 – 48+<\/strong><\/td>\nHGZ-100+ \/ HJK series<\/td>\nCross-country transmission + LNG cryogenic<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        ASME B36.10 + B36.19 vs International Standards<\/h2>\n
          \n
        • ISO 4200:<\/strong> International plain-end steel tubes; different OD + wall series.<\/li>\n
        • EN 10220:<\/strong> European seamless + welded steel tubes; DN designation (Diam\u00e8tre Nominal) approximately matches NPS.<\/li>\n
        • DIN 2448:<\/strong> German seamless steel tubes; historical DN + wall thickness.<\/li>\n
        • JIS G 3452 \/ 3454:<\/strong> Japanese SGP + SPPS pipe; different OD + wall.<\/li>\n
        • Interchangeability:<\/strong> Most ASME B31 codes accept international equivalents with conversion documentation; API 5L is globally standard for line pipe.<\/li>\n<\/ul>\n

          5 Common B36.10 + B36.19 Procurement Mistakes<\/h2>\n
            \n
          • Mistake 1 \u2014 Confuse NPS with actual OD:<\/strong> NPS 2 pipe has 60.3 mm OD (not 50.8 mm); mismatch causes fitting incompatibility.<\/li>\n
          • Mistake 2 \u2014 Wrong Schedule for pressure\/temperature:<\/strong> Schedule 40 used where Schedule 80 required per B31.3 calculation.<\/li>\n
          • Mistake 3 \u2014 Use carbon Schedule for stainless:<\/strong> Schedule 40 stainless heavier than needed; use Schedule 40S; wasted material + cost.<\/li>\n
          • Mistake 4 \u2014 Foreign pipe with different OD:<\/strong> DIN 2448 pipe with slightly different OD; fitting won’t fit; requires machining.<\/li>\n
          • Mistake 5 \u2014 XXS confused with Schedule 160:<\/strong> XXS and Schedule 160 differ for larger NPS; buyer needs to specify correctly.<\/li>\n<\/ul>\n

            Summary<\/h2>\n

            ASME B36.10 (Welded and Seamless Wrought Steel Pipe) + B36.19 (Stainless Steel Pipe) are dimensional standards governing pipe OD + wall thickness + NPS designation for carbon + low-alloy + stainless pipe used across B31.1 + B31.3 + B31.4 + B31.8 + B31.12 + Section VIII Div 1 nozzles + Section I boiler tube. NPS is nominal designation NOT actual dimension \u2014 for NPS \u2264 12″ OD is fixed; NPS \u2265 14″ OD = NPS \u00d7 25.4 mm. Schedule designation ranges Schedule 5S\/10S (stainless thin) through Schedule 40 (STD) \/ 80 (XS) \/ 160 \/ XXS (carbon heavy). Wuxi ABK pipe spool welding equipment supports full NPS 1\/2 through 48″+ range with HGZ-10\/30\/60\/100 + HJK series rotators matched to NPS + wall thickness combinations. International standard equivalents (ISO 4200 + EN 10220 + DIN 2448 + JIS G 3452\/3454) require conversion documentation for interchangeability. The 5 common mistakes (NPS vs OD confusion + wrong Schedule \/ stainless carbon Schedule \/ foreign pipe OD mismatch \/ XXS vs Schedule 160) account for most procurement failures. Wuxi ABK Machinery supplies pipe spool welding equipment<\/strong> supporting full ASME B36.10 + B36.19 pipe dimensional range for ASME B31.1 + B31.3 + B31.4 + B31.8 + B31.12 + Section VIII Div 1 + Section I applications globally.<\/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: 2026-06-30.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

            ASME B36.10 + B36.19 govern pipe OD, wall thickness, and NPS designation for carbon and stainless steel pipe spool fabrication. Learn 5 common procurement mistakes and Wuxi ABK equipment support.<\/p>\n","protected":false},"author":1,"featured_media":0,"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":[496,495,502,497,498,499,500,501,150],"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\/3318"}],"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=3318"}],"version-history":[{"count":1,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3318\/revisions"}],"predecessor-version":[{"id":3319,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/posts\/3318\/revisions\/3319"}],"wp:attachment":[{"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/media?parent=3318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/categories?post=3318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abkweldmc.com\/de\/wp-json\/wp\/v2\/tags?post=3318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}