{"id":3334,"date":"2025-07-31T14:16:25","date_gmt":"2025-07-31T14:16:25","guid":{"rendered":"https:\/\/discover.restek.com\/?p=3334"},"modified":"2025-12-08T23:30:58","modified_gmt":"2025-12-08T23:30:58","slug":"how-do-i-know-what-the-internal-diameter-of-my-lc-tubing-is","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/es\/faq-de\/gnot5082\/how-do-i-know-what-the-internal-diameter-of-my-lc-tubing-is","title":{"rendered":"How do I know what the internal diameter of my LC tubing is?"},"content":{"rendered":"\n
\"Stainless-steel<\/figure>\n\n\n\n

UHPLC systems are plumbed with extremely narrow-bore tubing that is indiscernible to the naked eye. For this reason, tubing lengths are color coded based on internal diameter. Restek offers stainless-steel capillary tubing with colored bands: red = 0.005\u201d; yellow = 0.007\u201d; blue = 0.010\u201d; and orange = 0.020\u201d. Color coding varies by manufacturer; it is not universal. It\u2019s also important to note that stainless-steel capillary tubing should be cut to length by the manufacturer, not by the customer. It is impossible to achieve a clean, square cut without professional machining cutters. Stainless-steel fittings with pre-swaged ferrules or EXP fittings with hybrid ferrules are used with stainless-steel tubing to achieve leak-tight seals for UHPLC at up to 20,000 psi.<\/p>\n\n\n\n

The internal diameter of LC grade stainless-steel tubing is identified by the colored band on the precut lengths.<\/p>\n","protected":false},"excerpt":{"rendered":"

UHPLC systems are plumbed with extremely narrow-bore tubing that is indiscernible to the naked eye. For this reason, tubing lengths are color coded based on internal diameter. Restek offers stainless-steel capillary tubing with colored bands: red = 0.005\u201d; yellow = 0.007\u201d; blue = 0.010\u201d; and orange = 0.020\u201d. Color coding varies by manufacturer; it is not…<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[802],"tags":[2682,2701],"industries-application":[],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[],"hf_cat_post":[625],"ppma_author":[414],"class_list":["post-3334","post","type-post","status-publish","format-standard","hentry","category-faq-de","tag-faq-hplc-and-uhplc","tag-faq-lc-hardware"],"acf":[],"taxonomy_info":{"category":[{"value":802,"label":"FAQ"}],"post_tag":[{"value":2682,"label":"FAQ: HPLC and UHPLC"},{"value":2701,"label":"FAQ: LC Hardware"}]},"featured_image_src_large":false,"author_info":{"display_name":"Restek Corporation","author_link":"https:\/\/discover.restek.com\/es\/author\/restek-corporation\/"},"comment_info":0,"category_info":[{"term_id":802,"name":"FAQ","slug":"faq-de","term_group":0,"term_taxonomy_id":802,"taxonomy":"category","description":"","parent":0,"count":271,"filter":"raw","cat_ID":802,"category_count":271,"category_description":"","cat_name":"FAQ","category_nicename":"faq-de","category_parent":0}],"tag_info":[{"term_id":2682,"name":"FAQ: HPLC and UHPLC","slug":"faq-hplc-and-uhplc","term_group":0,"term_taxonomy_id":2682,"taxonomy":"post_tag","description":"Browse frequently asked questions for HPLC and UHPLC products.","parent":0,"count":61,"filter":"raw"},{"term_id":2701,"name":"FAQ: LC Hardware","slug":"faq-lc-hardware","term_group":0,"term_taxonomy_id":2701,"taxonomy":"post_tag","description":"Browse frequently asked questions for LC hardware.","parent":0,"count":8,"filter":"raw"}],"authors":[{"term_id":414,"user_id":11,"is_guest":0,"slug":"restek-corporation","display_name":"Restek Corporation","avatar_url":{"url":"https:\/\/discover.restek.com\/wp-content\/uploads\/Restek_Favicon_300x300.jpg","url2x":"https:\/\/discover.restek.com\/wp-content\/uploads\/Restek_Favicon_300x300.jpg"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/posts\/3334","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/comments?post=3334"}],"version-history":[{"count":3,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/posts\/3334\/revisions"}],"predecessor-version":[{"id":70747,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/posts\/3334\/revisions\/70747"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/media?parent=3334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/categories?post=3334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/tags?post=3334"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/industries-application?post=3334"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/post-badge?post=3334"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/resource-type?post=3334"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/product-library?post=3334"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/resource-technique?post=3334"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/hf_cat_post?post=3334"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/es\/wp-json\/wp\/v2\/ppma_author?post=3334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}