{"id":1541,"date":"2020-05-25T12:37:35","date_gmt":"2020-05-25T09:37:35","guid":{"rendered":"https:\/\/nak.ua\/%d0%b1%d0%b5%d0%b7-%d0%ba%d0%b0%d1%82%d0%b5%d0%b3%d0%be%d1%80%d1%96%d1%97\/fitting-standards-dk-dkos-dkol-jic-differences\/"},"modified":"2020-05-25T12:37:35","modified_gmt":"2020-05-25T09:37:35","slug":"fitting-standards-dk-dkos-dkol-jic-differences","status":"publish","type":"post","link":"https:\/\/nak.ua\/en\/news\/fitting-standards-dk-dkos-dkol-jic-differences\/","title":{"rendered":"Why there are different manufacturing standards for DK, DKOS, DKOL and JIC fittings and how they differ"},"content":{"rendered":"

Why there are different manufacturing standards for DK, DKOS, DKOL and JIC fittings and how they differ<\/strong><\/p>\n

One of the components of a high-pressure hose (HP hose) is the metal fitting.<\/p>\n

As machinery and equipment developed, different fitting standards emerged. This is due to the design features of the working units and to the countries where they were created, each with its own units of measurement.<\/p>\n

The main distinguishing feature of fittings is the thread size. At present there are three of them.<\/p>\n

    \n
  1. Metric thread of the European standard (DIN \/ GOST). The standard uses the following fitting types:<\/li>\n<\/ol>\n

    DK, DKO, DKI, DKM, DK-Flat, DKL \u0456 DKS, DKFM \u0456 DKFG, DKWC, JIS-Komatsu, NTK.<\/p>\n

      \n
    1. British Standard Pipe inch thread (BSP). The following types are used:<\/li>\n<\/ol>\n

      BSP, BSPT, BSP-Flat, BSP (O-ring), NPTF, NPSM, JIS-Toyota.<\/p>\n

        \n
      1. Inch thread of the American standard (SAE).<\/li>\n<\/ol>\n

        Types used:<\/p>\n

        JIC, ORFS, SAE.<\/p>\n

        Let’s take a closer look at the history, advantages and drawbacks of some popular standards and types of fittings for HP hoses.<\/p>\n

        The DK standard<\/strong><\/h3>\n

        Created back in the 1950s, this standard uses metric threads from M14\u00d71.5 to M52\u00d72 and a universal nipple with sealing angles of 24\u00b0, 37\u00b0 and 60\u00b0.<\/p>\n

        The drawback of this type is fairly low pressure and load ratings. Also, because most units of that era are being replaced with more modern ones, this type of fitting is used less and less.<\/p>\n

        The DK standardO<\/strong><\/h3>\n

        This standard was developed in Germany and is divided into two types:<\/p>\n

        – DKOL – light-series fittings<\/p>\n

        – DKOS – heavy-series fittings<\/p>\n

        The fittings are made with an O-ring seal at the nipple tip. The seating cone sealing angle is 24\u00b0. Fittings with a male thread and 60\u00b0 and 24\u00b0 cones fit only universal fittings with a female thread and 60\u00b0 and 24\u00b0 cones.<\/p>\n

        The BSP standard<\/strong><\/h3>\n

        This standard uses what is known as the Whitworth thread. On fittings of this standard, sealing is achieved in two ways:<\/p>\n

        – by contact of the thread profile<\/p>\n

        – by a combination of cone and ring seals<\/p>\n

        The sealing angle is 60\u00b0.<\/p>\n

        It is also worth noting that fittings of this standard are made with two thread forms<\/p>\n

        – with a parallel thread (BSPP standard)<\/p>\n

        – with a tapered thread (BSPT standard)<\/p>\n

        BSP fittings are sometimes used in plumbing applications.<\/p>\n

        The JIC standard<\/strong><\/h3>\n

        This design and standard were developed in the USA in the 1950s for connecting flared tubes. The advantage of this fitting type is compatibility with many systems. The inverted cone sealing angle is 74\u00b0.<\/p>\n

        The fittings are manufactured with an American inch thread with a 60\u00b0 profile angle.<\/p>\n

        The ORFS standard<\/strong><\/h3>\n

        The ORFS standard \u0431\u0443\u0432 \u0440\u043e\u0437\u0440\u043e\u0431\u043b\u0435\u043d\u0438\u0439 \u0432 \u0421\u0428\u0410. \u0421\u0432\u043e\u044e \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u0456\u0441\u0442\u044c, \u0434\u0430\u043d\u0430 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0456\u044f \u0437\u0430\u0432\u043e\u044e\u0432\u0430\u043b\u0430 \u0437\u0430 \u0440\u0430\u0445\u0443\u043d\u043e\u043a \u0432\u0438\u0441\u043e\u043a\u043e\u0433\u043e \u0440\u0456\u0432\u043d\u044f \u0443\u0449\u0456\u043b\u044c\u043d\u0435\u043d\u043d\u044f \u0456 \u0441\u0442\u0456\u0439\u043a\u043e\u0441\u0442\u0456 \u0434\u043e \u0432\u0456\u0431\u0440\u0430\u0446\u0456\u0439. \u041f\u0440\u0438 \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u0430\u043d\u043d\u0456 \u0434\u0430\u043d\u043e\u0433\u043e \u0442\u0438\u043f\u0443 \u0444\u0456\u0442\u0438\u043d\u0433\u0456\u0432 \u0437\u0440\u0443\u0447\u043d\u043e \u0432\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u044e\u0432\u0430\u0442\u0438 \u0420\u0412\u0414 \u043d\u0430 \u0441\u0430\u043c \u043c\u0435\u0445\u0430\u043d\u0456\u0437\u043c \u0431\u0435\u0437 \u0437\u043c\u0456\u0449\u0435\u043d\u043d\u044f \u0456\u043d\u0448\u0438\u0445 \u0435\u043b\u0435\u043c\u0435\u043d\u0442\u0456\u0432. \u041a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0446\u0456\u0439\u043d\u043e \u043a\u0456\u043b\u044c\u0446\u0435 \u0443\u0449\u0456\u043b\u044c\u043d\u044e\u0432\u0430\u0447\u0430 \u0440\u043e\u0437\u0442\u0430\u0448\u043e\u0432\u0430\u043d\u043e \u0432 \u043a\u0430\u043d\u0430\u0432\u0446\u0456 \u0441\u0430\u043c\u043e\u0433\u043e \u0444\u0456\u0442\u0438\u043d\u0433\u0430.<\/p>\n

        We would like to note that for many years NAK has been engaged in HP hose manufacturing<\/a>. In our work we use machines from Uniflex<\/a>, known for their high German quality. Finished batches of hoses undergo testing. If you need hose supplies or simply a repair, our specialists are always ready to advise on selection and, of course, to assemble a finished product according to your specification.<\/p>\n

        \"\u0427\u043e\u043c\u0443<\/p>\n

        \"\u0427\u043e\u043c\u0443<\/p>\n

        \"\u0427\u043e\u043c\u0443<\/p>\n

        \"\u0427\u043e\u043c\u0443<\/p>\n","protected":false},"excerpt":{"rendered":"

        Why there are different manufacturing standards for DK, DKOS, DKOL and JIC fittings and how they differ One of the<\/p>\n","protected":false},"author":1,"featured_media":1165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"Fitting standards DK, DKOS, DKOL, JIC: differences | NAK","_seopress_titles_desc":"Metric, BSP and SAE thread standards for hose fittings: history, sealing angles, advantages and drawbacks of DK, DKO, BSP, JIC and ORFS.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"categories":[246],"tags":[],"class_list":["post-1541","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/posts\/1541","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/comments?post=1541"}],"version-history":[{"count":0,"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/posts\/1541\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/media\/1165"}],"wp:attachment":[{"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/media?parent=1541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/categories?post=1541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nak.ua\/en\/wp-json\/wp\/v2\/tags?post=1541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}