{"id":22921,"date":"2026-02-06T04:00:42","date_gmt":"2026-02-06T03:00:42","guid":{"rendered":"https:\/\/starmodul.com\/how-to-join-metal-pipes-without-welding-or-threading\/"},"modified":"2026-10-30T19:52:24","modified_gmt":"2026-10-30T18:52:24","slug":"how-to-join-metal-pipes-without-welding-or-threading","status":"publish","type":"post","link":"https:\/\/starmodul.com\/en\/how-to-join-metal-pipes-without-welding-or-threading\/","title":{"rendered":"How to join metal pipes without welding or threading"},"content":{"rendered":"<div style=\"background-color: #f4f5f7; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333333; padding: 20px;\">\n<div style=\"max-width: 800px; margin: 0 auto; background-color: #ffffff; border-radius: 8px; padding: 40px; box-shadow: 0 10px 40px -10px rgba(16, 24, 40, 0.15); border-top: 5px solid #fba905;\">\n<p style=\"margin-bottom: 18px; color: #444;\">Metalworking has historically been reserved for professionals due to the complexity of welding. However, new mechanical connector systems have democratized the construction of metal structures. It is now possible to assemble everything from shelving to pergolas using simple wrenches, eliminating the risks of fire and fumes.  <\/p>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Advantages of the cold bonding system<\/h2>\n<p style=\"margin-bottom: 18px; color: #444;\">Opting for bolted connectors for metal tubes offers clear benefits, especially for home DIY projects and quick assembly in industrial settings.<\/p>\n<ul style=\"list-style: none; padding-left: 0; margin-bottom: 25px;\">\n<li style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\">\n                <span style=\"color: #fba905; font-weight: bold; font-size: 1.5em; line-height: 1; margin-right: 12px; flex-shrink: 0; margin-top: 0.1em;\">&#8211;<\/span><br \/>\n                <span><strong style=\"color: #101828;\">Total safety:<\/strong> No sparks, no risk of fire and no need for special eye protection equipment.<\/span>\n            <\/li>\n<li style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\">\n                <span style=\"color: #fba905; font-weight: bold; font-size: 1.5em; line-height: 1; margin-right: 12px; flex-shrink: 0; margin-top: 0.1em;\">&#8211;<\/span><br \/>\n                <span><strong style=\"color: #101828;\">Reversibility:<\/strong> If you make a mistake, simply unscrew. The weld is permanent and requires cutting to correct. <\/span>\n            <\/li>\n<li style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\">\n                <span style=\"color: #fba905; font-weight: bold; font-size: 1.5em; line-height: 1; margin-right: 12px; flex-shrink: 0; margin-top: 0.1em;\">&#8211;<\/span><br \/>\n                <span><strong style=\"color: #101828;\">Speed:<\/strong> Assembly time is reduced by up to 50% as there is no need to prepare surfaces or wait for the material to cool.<\/span>\n            <\/li>\n<li style=\"display: flex; align-items: flex-start; margin-bottom: 12px;\">\n                <span style=\"color: #fba905; font-weight: bold; font-size: 1.5em; line-height: 1; margin-right: 12px; flex-shrink: 0; margin-top: 0.1em;\">&#8211;<\/span><br \/>\n                <span><strong style=\"color: #101828;\">Clean finish:<\/strong> No burrs or weld seams to file or paint afterwards.<\/span>\n            <\/li>\n<\/ul>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Available connector types<\/h2>\n<p style=\"margin-bottom: 18px; color: #444;\">There are different parts designed to cover all the geometric needs of a structure.<\/p>\n<div style=\"overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; margin: 30px 0; border-radius: 6px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.05); background-color: #fff;\">\n<thead>\n<tr style=\"background-color: #101828; color: #ffffff;\">\n<th style=\"padding: 15px; text-align: left; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.5px;\">Union Type<\/th>\n<th style=\"padding: 15px; text-align: left; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.5px;\">Primary Function<\/th>\n<th style=\"padding: 15px; text-align: left; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.5px;\">Common Application<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\">90\u00ba elbow<\/td>\n<td style=\"padding: 15px; color: #333;\">Forming clean corners.<\/td>\n<td style=\"padding: 15px; color: #333;\">Table frames, shelf corners.<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\">T-joint<\/td>\n<td style=\"padding: 15px; color: #333;\">Connecting one pipe perpendicular to another.<\/td>\n<td style=\"padding: 15px; color: #333;\">Crosspieces, handrails, reinforcements.<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\">Base or Flange<\/td>\n<td style=\"padding: 15px; color: #333;\">To fix the pipe to the floor or wall.<\/td>\n<td style=\"padding: 15px; color: #333;\">Furniture legs, anchoring posts.<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\">Crossover<\/td>\n<td style=\"padding: 15px; color: #333;\">Joining tubes that cross without cutting.<\/td>\n<td style=\"padding: 15px; color: #333;\">Complex structures, light scaffolding.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Connectors for square tubing without welding: StarModul dimensions<\/h2>\n<p style=\"margin-bottom: 18px; color: #444;\">StarModul connectors are galvanized steel pieces that are bolted to the tube, with hardware included. There are corner brackets, L-shaped and T-shaped connectors, straight outlets, and pieces for roofs with a slope, and each series corresponds to a tube size: <\/p>\n<div style=\"overflow-x: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; margin: 30px 0; background-color: #fff;\">\n<thead>\n<tr style=\"background-color: #101828; color: #ffffff;\">\n<th style=\"padding: 15px; text-align: left; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.5px;\">Series<\/th>\n<th style=\"padding: 15px; text-align: left; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.5px;\">Square or rectangular tube<\/th>\n<th style=\"padding: 15px; text-align: left; text-transform: uppercase; font-size: 0.85rem; letter-spacing: 0.5px;\">Type of connector<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\"><a href=\"https:\/\/starmodul.com\/en\/unions-tube-2-5x2-5-cm-without-fins\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">0025 Series<\/a><\/td>\n<td style=\"padding: 15px; color: #333;\">2.5 \u00d7 2.5 cm<\/td>\n<td style=\"padding: 15px; color: #333;\">Without flanges<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\"><a href=\"https:\/\/starmodul.com\/en\/unions-tube-5x5-cm-without-fins\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">SL55 Series<\/a><\/td>\n<td style=\"padding: 15px; color: #333;\">5 \u00d7 5 cm<\/td>\n<td style=\"padding: 15px; color: #333;\">Without flanges<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\"><a href=\"https:\/\/starmodul.com\/en\/5x5-cm-tube-fittings-with-fins\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">0055 Series<\/a><\/td>\n<td style=\"padding: 15px; color: #333;\">5 \u00d7 5 cm<\/td>\n<td style=\"padding: 15px; color: #333;\">With flanges<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\"><a href=\"https:\/\/starmodul.com\/en\/tube-joints-10x5-cm-with-fins\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">0105 Series<\/a><\/td>\n<td style=\"padding: 15px; color: #333;\">10 \u00d7 5 cm<\/td>\n<td style=\"padding: 15px; color: #333;\">With flanges<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\"><a href=\"https:\/\/starmodul.com\/en\/tube-fittings-10x5-cm-10x10-cm-with-fins\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">0510 Series<\/a><\/td>\n<td style=\"padding: 15px; color: #333;\">10 \u00d7 10 and 10 \u00d7 5 cm<\/td>\n<td style=\"padding: 15px; color: #333;\">With flanges<\/td>\n<\/tr>\n<tr style=\"border-bottom: 1px solid #eee;\">\n<td style=\"padding: 15px; color: #101828; font-weight: bold;\"><a href=\"https:\/\/starmodul.com\/en\/unions-tube-10x10-cm-with-fins\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">1010 Series<\/a><\/td>\n<td style=\"padding: 15px; color: #333;\">10 \u00d7 10 cm<\/td>\n<td style=\"padding: 15px; color: #333;\">With flanges<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 18px; color: #444;\">Connectors <strong>with flanges<\/strong> are the most common in structures for porches, garages, warehouses, and homes. Those <strong>without flanges<\/strong> are fixed with self-drilling screws in the center of the joint and provide a cleaner finish, intended for furniture, shelving, and exposed structures. <\/p>\n<p style=\"margin-bottom: 18px; color: #444;\">We also have the tubing: <a href=\"https:\/\/starmodul.com\/en\/galvanized-steel-pipes-for-metallic-structures\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">galvanized steel tubes<\/a> by the meter or <a href=\"https:\/\/starmodul.com\/en\/galvanized-steel-pipe-100x100x2mm\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">cut to size<\/a> for your project.<\/p>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Where to buy connectors for square tubing without welding<\/h2>\n<p style=\"margin-bottom: 18px; color: #444;\">You can buy individual pieces in the <a href=\"https:\/\/starmodul.com\/en\/shop\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">StarModul online store<\/a>, with shipping throughout Spain, or order a <a href=\"https:\/\/starmodul.com\/en\/structures-kit\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">complete kit<\/a> with connectors, cut tubes, and hardware. If you are unsure which pieces you need, design the structure in the <a href=\"https:\/\/starmodul.com\/en\/3d-configurator-metal-structure\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">3D configurator<\/a> and we will prepare a quote for you. <\/p>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Necessary tools<\/h2>\n<p style=\"margin-bottom: 18px; color: #444;\">To work with this system, the workshop is simplified to the maximum. You only need a saw to cut the profiles to size (or order them already cut), a wrench or an electric screwdriver to tighten the connector hardware, and a tape measure and a level for setting out. <\/p>\n<p style=\"margin-bottom: 18px; color: #444;\">If you want to start a project, you can view the components in the <a href=\"https:\/\/starmodul.com\/en\/bolted-joints-for-steel-structures\/\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">bolted connector system without welding<\/a>.<\/p>\n<p style=\"margin-bottom: 18px; color: #444;\">Learning how to <a href=\"https:\/\/starmodul.com\/en\/how-it-works\/\" target=\"_blank\" style=\"color: #101828; text-decoration: none; border-bottom: 2px solid #fba905; font-weight: 600;\">join tubes without welding<\/a> opens up a world of possibilities for creating industrial furniture and garden structures on your own.<\/p>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Conclusion<\/h2>\n<p style=\"margin-bottom: 18px; color: #444;\">Connector technology has eliminated the entry barrier to metalworking. It is the ideal solution for those looking for robustness without the technical complication of soldering. <\/p>\n<h2 style=\"color: #101828; font-size: 1.6rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: 700;\">Frequently asked questions about joining tubes without welding<\/h2>\n<div style=\"background-color: #f8f9fa; border-left: 4px solid #fba905; padding: 20px; margin-bottom: 15px; border-radius: 0 6px 6px 0;\">\n            <span style=\"display: block; font-weight: bold; color: #101828; margin-bottom: 8px;\">Are these joints resistant to heavy loads?<\/span><br \/>\n            <span style=\"color: #555;\">Yes. StarModul connectors are used in porches, garages, warehouses, and homes; bolted connectors transfer the stresses between tubes without welding. In building structures, the calculation must be performed by an engineer according to the project loads.  <\/span>\n        <\/div>\n<div style=\"background-color: #f8f9fa; border-left: 4px solid #fba905; padding: 20px; margin-bottom: 15px; border-radius: 0 6px 6px 0;\">\n            <span style=\"display: block; font-weight: bold; color: #101828; margin-bottom: 8px;\">Can they be used outdoors?<\/span><br \/>\n            <span style=\"color: #555;\">Perfectly. If both tubes and connectors are made of galvanized steel, they resist corrosion and weathering as well or better than a welded and painted structure. <\/span>\n        <\/div>\n<div style=\"background-color: #f8f9fa; border-left: 4px solid #fba905; padding: 20px; margin-bottom: 15px; border-radius: 0 6px 6px 0;\">\n            <span style=\"display: block; font-weight: bold; color: #101828; margin-bottom: 8px;\">Are they suitable for any tube?<\/span><br \/>\n            <span style=\"color: #555;\">No, they must be tubes of the specific diameter or dimension for the connector (in StarModul: 2.5\u00d72.5, 5\u00d75, 10\u00d75, or 10\u00d710 cm tubing). Precision is key for the grip. <\/span>\n        <\/div>\n<div style=\"background-color: #f8f9fa; border-left: 4px solid #fba905; padding: 20px; margin-bottom: 15px; border-radius: 0 6px 6px 0;\">\n            <span style=\"display: block; font-weight: bold; color: #101828; margin-bottom: 8px;\">Do they loosen with vibration?<\/span><br \/>\n            <span style=\"color: #555;\">If tightened to the recommended torque, they are very difficult to loosen. For high vibration machinery, chemical threadlockers can be used for extra security. <\/span>\n        <\/div>\n<div style=\"background-color: #f8f9fa; border-left: 4px solid #fba905; padding: 20px; margin-bottom: 15px; border-radius: 0 6px 6px 0;\">\n            <span style=\"display: block; font-weight: bold; color: #101828; margin-bottom: 8px;\">Can I disassemble and reuse the parts?<\/span><br \/>\n            <span style=\"color: #555;\">This is one of its great advantages. You can disassemble a table and use the same parts and tubes to build a shelf years later. <\/span>\n        <\/div>\n<div style=\"background-color: #f8f9fa; border-left: 4px solid #fba905; padding: 20px; margin-bottom: 15px; border-radius: 0 6px 6px 0;\">\n            <span style=\"display: block; font-weight: bold; color: #101828; margin-bottom: 8px;\">Is it more expensive than welding?<\/span><br \/>\n            <span style=\"color: #555;\">The parts have a cost, but you save the welding machine, gas, electrodes and skilled labor time, so the final cost is usually lower.<\/span>\n        <\/div>\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Metalworking has historically been reserved for professionals due to the complexity of welding. However, new mechanical connector systems have democratized the construction of metal structures. It is now possible to assemble everything from shelving to pergolas using simple wrenches, eliminating the risks of fire and fumes. Advantages of the cold bonding system Opting for bolted [&hellip;]<\/p>\n","protected":false},"author":303,"featured_media":35102,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[565],"tags":[],"class_list":["post-22921","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-guides"],"_links":{"self":[{"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/posts\/22921","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/users\/303"}],"replies":[{"embeddable":true,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/comments?post=22921"}],"version-history":[{"count":4,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/posts\/22921\/revisions"}],"predecessor-version":[{"id":30359,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/posts\/22921\/revisions\/30359"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/media\/35102"}],"wp:attachment":[{"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/media?parent=22921"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/categories?post=22921"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starmodul.com\/en\/wp-json\/wp\/v2\/tags?post=22921"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}