{"id":7513,"date":"2026-10-15T10:25:02","date_gmt":"2026-10-15T02:25:02","guid":{"rendered":"https:\/\/soroyaglobal.com\/?p=7513"},"modified":"2026-10-15T10:25:56","modified_gmt":"2026-10-15T02:25:56","slug":"stainless-steel-elbows-buttweld-vs-threaded-a-buyers-guide","status":"publish","type":"post","link":"https:\/\/soroyaglobal.com\/de\/stainless-steel-elbows-buttweld-vs-threaded-a-buyers-guide\/","title":{"rendered":"Edelstahl-Winkelst\u00fccke: Stumpfschwei\u00df- vs. Gewindeanschluss \u2013 Ein Einkaufsratgeber"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Bei der Beschaffung <strong>stainless steel elbows<\/strong>, the first decision buyers make after the angle is the connection type: <strong>buttweld<\/strong> oder <strong>threaded (screwed)<\/strong>. The choice determines pressure rating, installation method, leakage risk and total cost. This guide explains the difference, when to use each, and what to specify on your RFQ.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Buttweld elbows: welded into the line<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Buttweld elbows have plain, beveled ends that are welded directly to the pipe. They are the standard choice for process piping:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Druckstufe:<\/strong> full pipe rating (e.g. Sch 10S, 40S, 80S), suitable for high-pressure and high-temperature service.<\/li>\n\n\n\n<li><strong>Leak-tight:<\/strong> the joint becomes one continuous piece of metal \u2014 the most reliable connection.<\/li>\n\n\n\n<li><strong>Standards:<\/strong> ASTM A403 for austenitic stainless fitting, ASME B16.9 for dimensions.<\/li>\n\n\n\n<li><strong>Angles:<\/strong> 45\u00b0, 90\u00b0 and 180\u00b0 returns, long radius (LR) and short radius (SR).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Threaded (screwed) elbows: screwed into the line<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Threaded elbows have female NPT or BSPT threads and are screwed onto male-threaded pipe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Size range:<\/strong> typically NPS 1\/8&#8243; to 4&#8243; (DN6\u2013DN100); threaded fittings above 2&#8243; are uncommon.<\/li>\n\n\n\n<li><strong>Druckstufe:<\/strong> lower than buttweld, limited by the thread depth. Standard classes are 3000 lb, 6000 lb and 9000 lb (ASME B16.11).<\/li>\n\n\n\n<li><strong>Installation:<\/strong> fast and simple, no welding needed \u2014 ideal for instrumentation, small-bore lines and maintenance.<\/li>\n\n\n\n<li><strong>Leak risk:<\/strong> threaded joints can leak under vibration or thermal cycling; use thread sealant and proper torquing.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Which one should you choose?<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Use buttweld when:<\/strong> line size is 2&#8243; and above, pressure\/temperature is high, the line carries hazardous or valuable fluid, or leak-free joints are required.<\/li>\n\n\n\n<li><strong>Use threaded when:<\/strong> line size is small (typically \u2264 2&#8243;), welding is not practical on site, the line needs frequent dismantling, or it is instrument\/utility piping.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Grades and materials<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Both buttweld and threaded elbows are available in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>304 \/ 304L:<\/strong> general-purpose, water and mild chemicals.<\/li>\n\n\n\n<li><strong>316 \/ 316L:<\/strong> molybdenum-bearing, for coastal, chloride and chemical service.<\/li>\n\n\n\n<li><strong>Low-carbon grades (L):<\/strong> recommended when the fitting will be welded, to reduce carbide precipitation and intergranular corrosion.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Checkliste f\u00fcr die Angebotsanfrage des K\u00e4ufers<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Angle: 45\u00b0, 90\u00b0 or 180\u00b0.<\/li>\n\n\n\n<li>Connection type: buttweld (beveled ends) or threaded (NPT\/BSPT).<\/li>\n\n\n\n<li>Size (NPS or DN) and wall thickness \/ schedule (10S, 40S, 80S).<\/li>\n\n\n\n<li>Radius: long radius (LR, 1.5D) or short radius (SR, 1.0D) \u2014 see our <a href=\"https:\/\/soroyaglobal.com\/de\/stainless-steel-elbows-long-radius-vs-short-radius-a-buyers-guide\/\">LR vs SR elbow guide<\/a>.<\/li>\n\n\n\n<li>Grade (304\/L, 316\/L) and standard (ASTM A403, ASME B16.9 \/ B16.11).<\/li>\n\n\n\n<li>Material certificate (EN 10204 3.1) \u2014 see our <a href=\"https:\/\/soroyaglobal.com\/de\/stainless-steel-pipe-mill-test-certificate-buyer-checklist\/\">Checkliste f\u00fcr den K\u00e4ufer: Werkspr\u00fcfzeugnis<\/a>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For help choosing between buttweld and threaded stainless elbows, send us your line size, pressure and fluid.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SOROYA PTE. LTD.<\/strong><br>\nEmail\uff1anancy@soroya.com.sg<br>\nWhatsApp: +65 8058 3416<\/p>","protected":false},"excerpt":{"rendered":"<p>When sourcing stainless steel elbows, the first decision buyers make after the angle is the connection type: buttweld or threaded [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7514,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/posts\/7513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/comments?post=7513"}],"version-history":[{"count":1,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/posts\/7513\/revisions"}],"predecessor-version":[{"id":7515,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/posts\/7513\/revisions\/7515"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/media\/7514"}],"wp:attachment":[{"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/media?parent=7513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/categories?post=7513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/soroyaglobal.com\/de\/wp-json\/wp\/v2\/tags?post=7513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}