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class="firstHeading mw-first-heading"><span class="mw-page-title-main">Air line</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="This article exist only in this language. 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<div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Tube or hose carrying a compressed air supply</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">For companies engaged in air transportation, see <a href="/wiki/Airline" title="Airline">Airline</a>. For other uses, see <a href="/wiki/Airline_(disambiguation)" class="mw-disambig" title="Airline (disambiguation)">Airline (disambiguation)</a>.</div> <p>An <b>air line</b> is a <a href="/wiki/Tube_(fluid_conveyance)" title="Tube (fluid conveyance)">tube</a>, or <a href="/wiki/Hose" title="Hose">hose</a>, that contains and carries a <a href="/wiki/Compressed_air" title="Compressed air">compressed air</a> supply. In industrial usage, this may be used to inflate car or bicycle <a href="/wiki/Tire" title="Tire">tyres</a> or power <a href="/wiki/Tool" title="Tool">tools</a> worked by compressed air, for breathing apparatus in hazardous environments and to operate many other <a href="/wiki/Pneumatic" class="mw-redirect" title="Pneumatic">pneumatic</a> systems.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Air lines provide compressed air for a wide range of uses and to cater for a variety of uses air lines are manufactured in a range of corrosion-resistant materials. Typically air lines are made with flexible hose or rigid pipe. Air line hoses provide flexibility and mobility for use, whereas a piped air line is more permanent and resistant to damage. For a typical compressed air system, both types of air lines are used in conjunction. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Air_line_hose">Air line hose</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Air_line&action=edit&section=1" title="Edit section: Air line hose"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Air_line_hose_types.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Air_line_hose_types.png/400px-Air_line_hose_types.png" decoding="async" width="400" height="238" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Air_line_hose_types.png/600px-Air_line_hose_types.png 1.5x, //upload.wikimedia.org/wikipedia/commons/0/0a/Air_line_hose_types.png 2x" data-file-width="604" data-file-height="360" /></a><figcaption>Two types of air line hose</figcaption></figure> <p>Air line hoses are flexible tubes used to convey pressurised air. They are commonly used for carrying a supply of compressed air to operate pneumatic powered systems, such as a <a href="/wiki/Air_brake_(road_vehicle)" title="Air brake (road vehicle)">road vehicle air brake system</a> for large <a href="/wiki/Vehicle" title="Vehicle">vehicles</a> and a <a href="/wiki/Railway_air_brake" title="Railway air brake">railway air brake</a> system for <a href="/wiki/Railroad_car" title="Railroad car">railway carriages</a> / <a href="/wiki/Locomotive" title="Locomotive">locomotives</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Due to the versatility of a flexible compressed air supply hoses are also used for pneumatic hand tools, pneumatic robotics and for connections to air powered equipment. Hose air lines are manufactured with anti-corrosion & abrasion resistant materials, to prevent internal corrosion from air moisture/condensate and from external abrasion when in use. Air line hoses are manufactured in a number of materials, meaning each type of hose can provide different characteristics to suit its use. Some important characteristics include flexibility, weight & manoeuvrability.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <dl><dt>Commonly used materials for Air Line Hose</dt></dl> <ul><li><a href="/wiki/Rubber" class="mw-redirect" title="Rubber">Rubber</a> – Most commonly used</li> <li>Hybrid Material – A combination of polyurethane, PVC, and rubber</li> <li><a href="/wiki/PVC" class="mw-redirect" title="PVC">PVC</a></li> <li><a href="/wiki/Polyurethane" title="Polyurethane">Polyurethane</a><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></li></ul> <p>A wide range of hose sizes & materials are available to accommodate the different pressures, flow rates & of its intended use. There are two types of air line hose which are most commonly used. The two types are known as Standard (straight) and Recoil (coiled) hose types. The outer diameter size of <b>air line</b> hoses are manufactured in both <a href="/wiki/Imperial_units" title="Imperial units">imperial</a> and <a href="/wiki/Metric_system" title="Metric system">metric</a> unit systems. </p> <div class="mw-heading mw-heading2"><h2 id="Fixed_pipe_air_lines">Fixed pipe air lines</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Air_line&action=edit&section=2" title="Edit section: Fixed pipe air lines"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The term <b>air line</b> is also used to describe fixed pipe compressed air systems. These systems are often found in laboratories, workshops, manufacturing facilities & on other sites for industrial processes. Fixed pipe air lines can also found onboard large shipping vessels, as compressed air is used to rotate the engines for starting up. Large diameter pipework systems are used for air lines that convey compressed air over great distances, these are typically found on large industrial sites & research facilities. </p><p>Fixed pipe systems are typically connected to a large industrial <a href="/wiki/Compressor" title="Compressor">compressor</a>, located remotely, in a <a href="/wiki/Plant_room" class="mw-redirect" title="Plant room">plant room</a> or dedicated space. The compressed air lines will be piped from the compressor to one or multiple point of use outlets. At the outlet of a fixed air line you will typically find a <a href="/wiki/Pressure_regulator" title="Pressure regulator">Pressure regulator</a> installed upstream of the termination/outlet point, this allows the user to regulate the pressure and flow of air to suit the desired use. The regulator allows each outlet to be controlled independently, even though they are served by a common compressor and connected to the same system. </p><p>As with hose air lines, Fixed pipe air lines must be manufactured with anti-corrosion materials, such as non-ferrous metals or plastics, to prevent internal corrosion from air moisture content and condensate. </p> <dl><dt>Commonly used materials for piped air line systems</dt></dl> <ul><li>Aluminium – smooth bore, energy efficient pipework</li> <li>Galvanised carbon steel – medium and heavy weight pipework systems</li> <li>Stainless steel and copper compression jointed systems</li> <li>Plastics, ABS and MDPE pipework systems<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></li></ul> <p>Piped air lines are typically installed with a fall gradient away from the outlet point, this is to allow any build-up of moisture within the pipework (due to internal condensation) to drain via the automatic tank drain or via a drain leg installed on the system.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Branch connections to serve outlets are typically taken vertically off the top of the main supply line and then loop down to the outlet point. This is done as a safety precaution and to avoid damaging pneumatic equipment. A connection into the top of a main air line greatly reduces the risk of <a href="/wiki/Condensation" title="Condensation">Condensation</a> water or particulates being discharged at high velocity through the outlet.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Uses">Uses</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Air_line&action=edit&section=3" title="Edit section: Uses"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Common uses of air hoses include: </p> <ul><li>To supply compressed air to <a href="/wiki/Pneumatic_tool" title="Pneumatic tool">pneumatic hand tools</a>.</li> <li>In road vehicles, between tractors and semi-trailers which use <a href="/wiki/Air_brake_(road_vehicle)" title="Air brake (road vehicle)">air brakes</a>.</li> <li>In <a href="/wiki/Railway_air_brake" title="Railway air brake">railway air brakes</a>.</li> <li>To supply <a href="/wiki/Breathing_gas" title="Breathing gas">breathing gas</a> to <a href="/wiki/Underwater_diving" title="Underwater diving">underwater divers</a> from the surface, usually through a <a href="/wiki/Diver%27s_umbilical" class="mw-redirect" title="Diver's umbilical">diving umbilical</a> cable.</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Air_line&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist 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(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.ciscoair.com/applications-compressed-air/">"Applications of Compressed Air"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Applications+of+Compressed+Air&rft_id=https%3A%2F%2Fwww.ciscoair.com%2Fapplications-compressed-air%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+line" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.ciscoair.com/applications-compressed-air/">"Applications of Compressed Air"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Applications+of+Compressed+Air&rft_id=https%3A%2F%2Fwww.ciscoair.com%2Fapplications-compressed-air%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+line" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.air-compressorsdirect.co.uk/airline-hose">"Air Compressors Direct - ABAC Air, ABAC Spinn, ABAC Genesis, ABAC pro and Bambi Compressors - Air Compressors Supplies UK"</a>. March 2017.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Air+Compressors+Direct+-+ABAC+Air%2C+ABAC+Spinn%2C+ABAC+Genesis%2C+ABAC+pro+and+Bambi+Compressors+-+Air+Compressors+Supplies+UK&rft.date=2017-03&rft_id=https%3A%2F%2Fwww.air-compressorsdirect.co.uk%2Fairline-hose&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+line" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.sgs-engineering.com/help-advice/choose-perfect-compressor-air-hose/#">"How to Choose the Perfect Air Compressor Hose / Help & Advice"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=How+to+Choose+the+Perfect+Air+Compressor+Hose+%2F+Help+%26+Advice&rft_id=https%3A%2F%2Fwww.sgs-engineering.com%2Fhelp-advice%2Fchoose-perfect-compressor-air-hose%2F%23&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+line" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.sgs-engineering.com/help-advice/choose-perfect-compressor-air-hose/#">"How to Choose the Perfect Air Compressor Hose / Help & Advice"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=How+to+Choose+the+Perfect+Air+Compressor+Hose+%2F+Help+%26+Advice&rft_id=https%3A%2F%2Fwww.sgs-engineering.com%2Fhelp-advice%2Fchoose-perfect-compressor-air-hose%2F%23&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+line" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text">Archived at <a rel="nofollow" class="external text" href="https://ghostarchive.org/varchive/youtube/20211205/2KKCwfvqoNs">Ghostarchive</a> and the <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140429154904/http://www.youtube.com/watch?v=2KKCwfvqoNs">Wayback Machine</a>: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=2KKCwfvqoNs">"Compressed Air System Basics"</a>. <i><a href="/wiki/YouTube" title="YouTube">YouTube</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=YouTube&rft.atitle=Compressed+Air+System+Basics&rft_id=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D2KKCwfvqoNs&rfr_id=info%3Asid%2Fen.wikipedia.org%3AAir+line" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.parkertransair.com/jahia/Jahia/lang/en_GB/filiale/czech/home/TechnicalCenter/CompressedAirPipeSystem">"Compressed air pipe system"</a>.</cite><span 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