{"id":1010,"date":"2026-04-17T23:31:30","date_gmt":"2026-04-18T03:31:30","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1010"},"modified":"2026-04-17T23:43:41","modified_gmt":"2026-04-18T03:43:41","slug":"lap-joint-flange-stub-end-assembly-easy-alignment-piping-systems","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/zh\/2026\/04\/17\/lap-joint-flange-stub-end-assembly-easy-alignment-piping-systems\/","title":{"rendered":"\u642d\u63a5\u6cd5\u5170\u77ed\u7aef\u7ec4\u4ef6 \u6613\u4e8e\u5bf9\u51c6\u7684\u7ba1\u9053\u7cfb\u7edf"},"content":{"rendered":"<h2>Understanding Lap Joint Flanges<\/h2>\n<p>A Lap Joint Flange consists of two components: a stub end and a backing flange. The stub end is butt-welded to the pipe, while the backing flange rotates freely around it, allowing for easy bolt hole alignment during assembly.<\/p>\n<h3>Design Features<\/h3>\n<ul>\n<li>Two-piece construction: stub end + backing flange<\/li>\n<li>Backing flange rotates freely for bolt alignment<\/li>\n<li>Stub end provides pressure containment<\/li>\n<li>Available in various materials and finishes<\/li>\n<\/ul>\n<h3>Key Advantages<\/h3>\n<ol>\n<li><strong>Easy Alignment:<\/strong> Rotating flange simplifies bolt hole matching<\/li>\n<li><strong>Cost Savings:<\/strong> Backing flange can be lower-grade material<\/li>\n<li><strong>Quick Disassembly:<\/strong> Ideal for systems requiring frequent maintenance<\/li>\n<li><strong>Reduced Installation Time:<\/strong> No need to rotate pipe for alignment<\/li>\n<li><strong>\u591a\u529f\u80fd\u6027\uff1a<\/strong> Compatible with various stub end materials<\/li>\n<\/ol>\n<h3>Typical Applications<\/h3>\n<ul>\n<li>Low-pressure piping systems<\/li>\n<li>Systems requiring frequent disassembly<\/li>\n<li>Large diameter piping where alignment is challenging<\/li>\n<li>Water treatment and distribution systems<\/li>\n<li>HVAC and fire protection systems<\/li>\n<li>Process piping with expansion joints<\/li>\n<\/ul>\n<h3>Material Combinations<\/h3>\n<table>\n<tr>\n<th>Component<\/th>\n<th>Material Options<\/th>\n<\/tr>\n<tr>\n<td>Stub End<\/td>\n<td>304\/316 Stainless, Carbon Steel, Duplex<\/td>\n<\/tr>\n<tr>\n<td>Backing Flange<\/td>\n<td>Carbon Steel (cost-effective option)<\/td>\n<\/tr>\n<\/table>\n<h3>\u6807\u51c6<\/h3>\n<ul>\n<li>ASME B16.5: Class 150-2500<\/li>\n<li>EN 1092-1: PN6-PN100<\/li>\n<li>GB\/T 9115: Chinese lap joint flange standard<\/li>\n<\/ul>\n<h3>Installation Tips<\/h3>\n<ol>\n<li>Ensure stub end is properly welded to pipe<\/li>\n<li>Verify backing flange rotates freely<\/li>\n<li>Check gasket seating surface is clean<\/li>\n<li>Tighten bolts in cross pattern<\/li>\n<\/ol>\n<p>Lap joint flanges offer an economical and practical solution for piping systems requiring frequent maintenance or where precise bolt alignment is challenging.<\/p>\n<p><strong>WhatsApp\uff1a<\/strong>\u00a0+86-18658777855<br \/>\n<strong>\u7535\u5b50\u90ae\u4ef6\uff1a<\/strong>\u00a01007788887@qq.com<br \/>\n<a href=\"https:\/\/www.720yun.com\/vr\/a6ajt7ynrw0\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-884\" src=\"http:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4.webp\" alt=\"\" width=\"1290\" height=\"2317\" srcset=\"https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4.webp 1290w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-167x300.webp 167w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-570x1024.webp 570w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-768x1379.webp 768w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-855x1536.webp 855w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-1140x2048.webp 1140w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-7x12.webp 7w, https:\/\/www.songhaiflange.com\/wp-content\/uploads\/2026\/04\/4-416x747.webp 416w\" sizes=\"auto, (max-width: 1290px) 100vw, 1290px\" \/><\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u642d\u63a5\u6cd5\u5170 \u642d\u63a5\u6cd5\u5170\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a\u4e00\u4e2a\u77ed\u7aef\u548c\u4e00\u4e2a\u652f\u6491\u6cd5\u5170\u3002\u77ed\u7aef\u901a\u8fc7\u5bf9\u710a\u8fde\u63a5\u5230\u7ba1\u9053\u4e0a\uff0c\u800c\u80cc\u886c\u6cd5\u5170\u5219\u53ef\u7ed5\u77ed\u7aef\u81ea\u7531\u65cb\u8f6c\uff0c\u4ece\u800c\u4fbf\u4e8e\u5728\u7ec4\u88c5\u8fc7\u7a0b\u4e2d\u5bf9\u51c6\u87ba\u6813\u5b54\u3002\u8bbe\u8ba1\u7279\u70b9 \u4e24\u4ef6\u5f0f\u7ed3\u6784\uff1a\u77ed\u7aef + \u652f\u6491\u6cd5\u5170 \u652f\u6491\u6cd5\u5170\u53ef\u65cb\u8f6c [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[71,66,103,70],"class_list":["post-1010","post","type-post","status-publish","format-standard","hentry","category-blog","tag-facing","tag-flange","tag-lapjoint","tag-standard"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/posts\/1010","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/comments?post=1010"}],"version-history":[{"count":2,"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/posts\/1010\/revisions"}],"predecessor-version":[{"id":1021,"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/posts\/1010\/revisions\/1021"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/media?parent=1010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/categories?post=1010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/zh\/wp-json\/wp\/v2\/tags?post=1010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}