{"id":1904,"date":"2019-12-01T12:05:09","date_gmt":"2019-12-01T12:05:09","guid":{"rendered":"http:\/\/nahrab.decodat.com\/?page_id=1904"},"modified":"2021-02-08T08:47:45","modified_gmt":"2021-02-08T08:47:45","slug":"%da%a9%d9%88%d9%be%d9%84%db%8c%d9%86%da%af-%d9%85%d8%b3%d8%aa%d9%82%db%8c%d9%85","status":"publish","type":"page","link":"https:\/\/en.nahrab.net\/?page_id=1904","title":{"rendered":"Straight coupling"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1904\" class=\"elementor elementor-1904\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-43fc2b1 elementor-section-stretched elementor-section-height-min-height elementor-section-boxed elementor-section-height-default elementor-section-items-middle\" data-id=\"43fc2b1\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b7a2bb9\" data-id=\"b7a2bb9\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-836130e elementor-widget elementor-widget-writing-effect-headline\" data-id=\"836130e\" data-element_type=\"widget\" data-widget_type=\"writing-effect-headline.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t        <h3 class=\"futurio-extra-written-headline\" data-speed=\"50\" data-delay=\"1000\" data-loop=\"1\">\r\n        \r\n                    <span class=\"written-lines\">STRAIGHT<\/span>\r\n        \r\n                    <span class=\"after-written\">COUPLING<\/span>\r\n                <\/h3>\r\n        \t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cef7dde elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-invisible\" data-id=\"cef7dde\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeIn&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3d98f29\" data-id=\"3d98f29\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4b7fdd7 elementor-position-right elementor-vertical-align-top elementor-widget elementor-widget-image-box\" data-id=\"4b7fdd7\" data-element_type=\"widget\" data-widget_type=\"image-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-image-box-wrapper\"><figure class=\"elementor-image-box-img\"><img fetchpriority=\"high\" decoding=\"async\" width=\"297\" height=\"297\" src=\"https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/Coupling.png\" class=\"elementor-animation-grow attachment-medium size-medium wp-image-1909\" alt=\"\u06a9\u0648\u067e\u0644\u06cc\u0646\u06af \u0645\u0633\u062a\u0642\u06cc\u0645\" srcset=\"https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/Coupling.png 297w, https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/Coupling-150x150.png 150w, https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/Coupling-100x100.png 100w, https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/Coupling-64x64.png 64w\" sizes=\"(max-width: 297px) 100vw, 297px\" \/><\/figure><div class=\"elementor-image-box-content\"><h3 class=\"elementor-image-box-title\">Straight coupling<\/h3><p class=\"elementor-image-box-description\">\nDN:50-3000 mm\n|\nPN: 10-25 bar\n\n\n<p style=\"text-align: justify;\">The coupling can be used to connect the pipe below or above ground level by observing the following technical specifications. By using the water coupling system, there will be no need for threading , beveling, welding or flanging the pipe end  and the problems caused by the contraction and longitudinal expansion in the pipes on this fitting  will be eliminated.\n<\/p><\/p><\/div><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-5bf3905 elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-invisible\" data-id=\"5bf3905\" data-element_type=\"section\" data-settings=\"{&quot;animation&quot;:&quot;fadeInDown&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-45cf26a\" data-id=\"45cf26a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-feae05c elementor-widget elementor-widget-counter\" data-id=\"feae05c\" data-element_type=\"widget\" data-widget_type=\"counter.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-counter\">\n\t\t\t<div class=\"elementor-counter-number-wrapper\">\n\t\t\t\t<span class=\"elementor-counter-number-prefix\">DN: 50 - <\/span>\n\t\t\t\t<span class=\"elementor-counter-number\" data-duration=\"2000\" data-to-value=\"3000\" data-from-value=\"50\">50<\/span>\n\t\t\t\t<span class=\"elementor-counter-number-suffix\"><\/span>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-counter-title\">mm<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-f4bb989\" data-id=\"f4bb989\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bbc8ab6 elementor-widget elementor-widget-counter\" data-id=\"bbc8ab6\" data-element_type=\"widget\" data-widget_type=\"counter.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-counter\">\n\t\t\t<div class=\"elementor-counter-number-wrapper\">\n\t\t\t\t<span class=\"elementor-counter-number-prefix\">PN: 10 - <\/span>\n\t\t\t\t<span class=\"elementor-counter-number\" data-duration=\"2000\" data-to-value=\"25\" data-from-value=\"10\" data-delimiter=\",\">10<\/span>\n\t\t\t\t<span class=\"elementor-counter-number-suffix\"><\/span>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-counter-title\">Bar<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ae08ea elementor-tabs-view-horizontal elementor-widget elementor-widget-tabs\" data-id=\"1ae08ea\" data-element_type=\"widget\" data-widget_type=\"tabs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-tabs\">\n\t\t\t<div class=\"elementor-tabs-wrapper\" role=\"tablist\" >\n\t\t\t\t\t\t\t\t\t<div id=\"elementor-tab-title-2811\" class=\"elementor-tab-title elementor-tab-desktop-title\" aria-selected=\"true\" data-tab=\"1\" role=\"tab\" tabindex=\"0\" aria-controls=\"elementor-tab-content-2811\" aria-expanded=\"false\">More Details<\/div>\n\t\t\t\t\t\t\t\t\t<div id=\"elementor-tab-title-2812\" class=\"elementor-tab-title elementor-tab-desktop-title\" aria-selected=\"false\" data-tab=\"2\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2812\" aria-expanded=\"false\">Technical Document<\/div>\n\t\t\t\t\t\t\t\t\t<div id=\"elementor-tab-title-2813\" class=\"elementor-tab-title elementor-tab-desktop-title\" aria-selected=\"false\" data-tab=\"3\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2813\" aria-expanded=\"false\">Technical Drawing<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<div class=\"elementor-tabs-content-wrapper\" role=\"tablist\" aria-orientation=\"vertical\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-tab-title elementor-tab-mobile-title\" aria-selected=\"true\" data-tab=\"1\" role=\"tab\" tabindex=\"0\" aria-controls=\"elementor-tab-content-2811\" aria-expanded=\"false\">More Details<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-2811\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"tabpanel\" aria-labelledby=\"elementor-tab-title-2811\" tabindex=\"0\" hidden=\"false\"><p><strong>Application:<\/strong><\/p><p>The coupling can be used to connect the pipe below or above ground level by observing the following technical specifications. By using the water coupling system, there will be no need for threading , beveling, welding or flanging the pipe end\u00a0 and the problems caused by the contraction and longitudinal expansion in the pipes on this fitting\u00a0 will be eliminated.<\/p><p><strong>Product \u00a0features:<\/strong><\/p><ul><li>No need for special tools and facilities for installation<\/li><li>Can be installed in any weather conditions and in narrow trenches<\/li><li>No need for bonding, welding, beveling and threading pipes<\/li><li>High speed installation and assembly<\/li><li>Suitable for all types of PVC, GRP, DUCTILE, STEEL, pipes<\/li><li>No need to specify the exact position for installation<\/li><li>Placing the pipes with this type of coupling along the curved path without using any elbows or bends.<\/li><li>Compensation the effects of temperature changes with linear displacement<\/li><li>Reducing the need for joints.<\/li><li>Suitable for all types of PVC, GRP, DUCTILE, STEEL, pipes<\/li><li>No need to specify the exact position for installation<\/li><li>Placing the pipes with this type of coupling along the curved path without necessity for an elbow or a bend.<\/li><li>Reducing the need for joints<\/li><\/ul><p><strong>Corrosion Protection:<\/strong><\/p><p>Electrostatic Epoxy Powder Coating with min 250 \u00b5m thickness, certified by reputable international institutions for potable water.<\/p><p><strong>The effect of temperature on the coupling:<\/strong><\/p><p>The coupling temperature performance depends on the type of rubber gasket (sealing gasket) used in it and can be used up to 100 \u00b0 C. The coupling operates at a relatively constant temperature with maximum efficiency. If thermal turbulence occurs, the coupling screws need to be readjusted. Therefore, the coupling cannot be used in places such as central heating with high temperature changes.<\/p><p><strong>Chemical resistance:<\/strong><\/p><p>The chemical resistance of the coupling is determined by the strength of the metal surface and the rubber material and the inner surface of the coupling.<\/p><p><strong>Pipe Coatings:<\/strong><\/p><p>Some pipes are covered \u00a0with a layer for protection, which increases the outer diameter of the pipe, in which case the coupling can also be used, and to use, it is necessary to chip away a thin layer of the protective coating, The pipes should then be re-painted and ready to be installed for cathodic and corrosion protection\u00a0 .It should be noted that the protective layer must be\u00a0 removed \u00a0only a short distance from the pipe ends and if protective wires are used for cathodic protection of pipes, Nahrabab Gostar Eshtehard Company is able to provide\u00a0 suitable couplings with the shape of pipes for use. Therefore, we must be aware of the final diameter of the pipes, i.e \u00a0\u00a0the outer diameter of the pipe plus the thickness of the coating or protective layer.<\/p><p><strong>Stress reduction in the system:<\/strong><\/p><ul><li>Rubber gaskets absorb sound and vibrations.<\/li><li>The distance between the two ends of the pipes can be used as a vibration absorber.<\/li><li>Due to the above characteristics, different types of couplings can be used as vibration absorber in pumping stations and along the pipe.<\/li><\/ul><p><strong>Use of<\/strong> <strong>Coupling \u00a0for GRP Pipes:<\/strong><\/p><p>Couplings can be used instead of manchoned<a href=\"#_ftn1\" name=\"_ftnref1\">[1]<\/a> end\u00a0 to connect GRP pipes in pipelines<strong>. <\/strong>The advantages of coupling over manchon is as follows:<\/p><p>When repairing or disconnecting two connected pipes in GRP pipelines, the manchoned end must be broken, while the coupling can be easily opened and closed due to the bolted connection.<\/p><p style=\"text-align: left;\">Resin (adhesive) and fiber welding methods are used to implement GRP pipelines, but the coupling connection is used for both above and under- ground .The angular flexibility of the coupling is greater than the angular deflection of the manchoned end.<\/p><p dir=\"rtl\" style=\"text-align: left;\">. installation and assembly speed is faster than manchone<\/p><p dir=\"rtl\"><img decoding=\"async\" class=\"alignnone size-medium wp-image-1906 aligncenter\" src=\"http:\/\/nahrab.decodat.com\/wp-content\/uploads\/2019\/12\/sh01-300x290.png\" alt=\"\" width=\"300\" height=\"290\" srcset=\"https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/sh01-300x290.png 300w, https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/sh01-64x62.png 64w, https:\/\/en.nahrab.net\/wp-content\/uploads\/2019\/12\/sh01.png 401w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p><div><table id=\"table-1\"><colgroup> <col \/> <col \/> <col \/> <\/colgroup><tbody><tr><td class=\"CellOverride-1\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-1\">Item <\/span><span class=\"CharOverride-2\">No<\/span><\/p><\/td><td class=\"CellOverride-1\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-1\">Name<\/span><\/p><\/td><td class=\"CellOverride-1\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-1\">Material<\/span><\/p><\/td><\/tr><tr><td class=\"CellOverride-2\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-3\">1 <\/span><\/p><\/td><td class=\"CellOverride-2\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-4\">Body<\/span><\/p><\/td><td class=\"CellOverride-2\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-3\">ST37-2<\/span><\/p><\/td><\/tr><tr><td class=\"CellOverride-3\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-3\">2 <\/span><\/p><\/td><td class=\"CellOverride-3\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-4\">End Ring<\/span><\/p><\/td><td class=\"CellOverride-3\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-3\">ST37-2 or Ductile Iron<\/span><\/p><\/td><\/tr><tr><td class=\"CellOverride-2\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-3\">3 <\/span><\/p><\/td><td class=\"CellOverride-2\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-4\">Gasket<\/span><\/p><\/td><td class=\"CellOverride-2\"><p class=\"Normal ParaOverride-1\"><span style=\"font-family: Arial, sans-serif;\"><span style=\"font-variant-caps: small-caps;\"><b>NBR or EPDM<\/b><\/span><\/span><\/p><\/td><\/tr><tr><td class=\"CellOverride-4\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-3\">4 <\/span><\/p><\/td><td class=\"CellOverride-4\"><p class=\"Normal ParaOverride-1\"><span class=\"CharOverride-4\">Bolts &amp; Nuts<\/span><\/p><\/td><td class=\"CellOverride-4\"><p class=\"Normal ParaOverride-1\"><span style=\"font-family: Arial, sans-serif;\"><span style=\"font-variant-caps: small-caps;\"><b>Galvanized steel<\/b><\/span><\/span><\/p><\/td><\/tr><\/tbody><\/table><\/div><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-tab-title elementor-tab-mobile-title\" aria-selected=\"false\" data-tab=\"2\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2812\" aria-expanded=\"false\">Technical Document<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-2812\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"tabpanel\" aria-labelledby=\"elementor-tab-title-2812\" tabindex=\"0\" hidden=\"hidden\"><ul dir=\"rtl\"><li style=\"text-align: right;\"><a href=\"https:\/\/en.nahrab.net\/wp-content\/uploads\/2021\/02\/Coupling-Straight-STepped-..-.pdf\">Coupling Straight Stepped<\/a><\/li><li style=\"text-align: right;\"><a href=\"http:\/\/nahrab.net\/wp-content\/uploads\/2019\/12\/\u062f\u0633\u062a\u0648\u0631\u0627\u0644\u0639\u0645\u0644-\u0646\u0635\u0628-\u0648-\u0646\u06af\u0647\u062f\u0627\u0631\u06cc-\u06a9\u0648\u067e\u0644\u06cc\u0646\u06af.pdf\">\u0631\u0627\u0647\u0646\u0645\u0627\u06cc \u0646\u0635\u0628 \u0648 \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u06a9\u0648\u067e\u0644\u06cc\u0646\u06af<\/a><\/li><\/ul><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-tab-title elementor-tab-mobile-title\" aria-selected=\"false\" data-tab=\"3\" role=\"tab\" tabindex=\"-1\" aria-controls=\"elementor-tab-content-2813\" aria-expanded=\"false\">Technical Drawing<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-2813\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"tabpanel\" aria-labelledby=\"elementor-tab-title-2813\" tabindex=\"0\" hidden=\"hidden\"><p dir=\"rtl\" style=\"text-align: left;\">Technical drawings of this valve will be Uploaded soon<\/p><\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>STRAIGHT COUPLING Straight coupling DN:50-3000 mm | PN: 10-25 bar The coupling can be used to connect the pipe below or above ground level by observing the following technical specifications. By using the water coupling system, there will be no need for threading , beveling, welding or flanging the pipe end and the problems caused&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/en.nahrab.net\/index.php?rest_route=\/wp\/v2\/pages\/1904"}],"collection":[{"href":"https:\/\/en.nahrab.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/en.nahrab.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/en.nahrab.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/en.nahrab.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1904"}],"version-history":[{"count":15,"href":"https:\/\/en.nahrab.net\/index.php?rest_route=\/wp\/v2\/pages\/1904\/revisions"}],"predecessor-version":[{"id":3263,"href":"https:\/\/en.nahrab.net\/index.php?rest_route=\/wp\/v2\/pages\/1904\/revisions\/3263"}],"wp:attachment":[{"href":"https:\/\/en.nahrab.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}