{"id":3420,"date":"2022-10-26T16:06:34","date_gmt":"2022-10-26T16:06:34","guid":{"rendered":"https:\/\/daniel.com\/?page_id=3420"},"modified":"2025-11-19T22:48:17","modified_gmt":"2025-11-19T22:48:17","slug":"orifice-flange-unions","status":"publish","type":"page","link":"https:\/\/daniel.com\/?page_id=3420","title":{"rendered":"Orifice Flange Unions"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1216.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_2_5 2_5 fusion-flex-column fusion-flex-align-self-flex-start\" style=\"--awb-bg-size:cover;--awb-width-large:40%;--awb-margin-top-large:0px;--awb-spacing-right-large:4.8%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:4.8%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element \" style=\"text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\" class=\"image-magnify\" class=\"image-scroll\"><img decoding=\"async\" width=\"730\" height=\"774\" title=\"Orifice Flange Unions-block-dn-new\" src=\"https:\/\/daniel.com\/wp-content\/uploads\/2022\/10\/Orifice-Flange-Unions-block-dn-new.png\" data-orig-src=\"https:\/\/daniel.com\/wp-content\/uploads\/2022\/10\/Orifice-Flange-Unions-block-dn-new.png\" alt class=\"lazyload img-responsive wp-image-3428\" 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style=\"--awb-bg-size:cover;--awb-width-large:60%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.2%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.2%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-title title fusion-title-1 fusion-title-text fusion-title-size-two h2product\"><div class=\"title-sep-container title-sep-container-left fusion-no-large-visibility fusion-no-medium-visibility fusion-no-small-visibility\"><div class=\"title-sep sep- sep-solid\" style=\"border-color:var(--awb-color3);\"><\/div><\/div><span class=\"awb-title-spacer fusion-no-large-visibility fusion-no-medium-visibility fusion-no-small-visibility\"><\/span><h2 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:uppercase;--fontSize:26;--minFontSize:26;line-height:var(--awb-typography1-line-height);\">Orifice Flange Unions<\/h2><span class=\"awb-title-spacer\"><\/span><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep- sep-solid\" style=\"border-color:var(--awb-color3);\"><\/div><\/div><\/div><div class=\"fusion-separator\" style=\"align-self: flex-start;margin-right:auto;margin-top:10px;margin-bottom:30px;width:100%;max-width:150px;\"><div class=\"fusion-separator-border sep-single\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color3);border-top-width:3px;\"><\/div><\/div><div class=\"fusion-title title fusion-title-2 fusion-title-text fusion-title-size-three\"><div class=\"title-sep-container title-sep-container-left fusion-no-large-visibility fusion-no-medium-visibility fusion-no-small-visibility\"><div class=\"title-sep sep- sep-solid\" style=\"border-color:var(--awb-color3);\"><\/div><\/div><span class=\"awb-title-spacer fusion-no-large-visibility fusion-no-medium-visibility fusion-no-small-visibility\"><\/span><h3 class=\"title-heading-left fusion-responsive-typography-calculated\" style=\"margin:0;text-transform:capitalize;--fontSize:20;--minFontSize:20;line-height:var(--awb-custom_typography_1-line-height);\">Quality Beyond Compare<\/h3><span class=\"awb-title-spacer\"><\/span><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep- sep-solid\" style=\"border-color:var(--awb-color3);\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-1\" style=\"--awb-text-transform:none;\"><p><span class=\"fusion-dropcap dropcap dropcap-boxed\" style=\"--awb-border-radius:0px;\">E<\/span>Exceptional performance and superior durability are the hallmarks of Daniel Orifice Flange Unions. Available in line sizes 2-inch to 8-inch and ANSI 600 to 2500 with carbon steel or stainless steel assembly. Every Daniel OFU is expertly manufactured to meet or exceed AGA 3\/API 14.3 standards.<\/p>\n<\/div><div class=\"fusion-text fusion-text-2 turn-off\" style=\"--awb-font-size:13px;--awb-text-transform:none;--awb-text-color:var(--awb-color3);\"><p style=\"text-align: left; margin-bottom: 1px;\"><strong>Coming Soon:<\/strong><\/p>\n<div class=\"fusion-separator fusion-full-width-sep\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:0px;margin-bottom:10px;width:100%;\"><div class=\"fusion-separator-border sep-single\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color3);border-top-width:1px;\"><\/div><\/div>\n<\/div><div class=\"fusion-builder-row fusion-builder-row-inner fusion-row fusion-flex-align-items-flex-start\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-0 fusion_builder_column_inner_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div style=\"text-align:center;\"><a class=\"fusion-button button-flat button-medium button-default fusion-button-default button-1 fusion-button-span-yes fusion-button-default-type button-width160\" style=\"--button_margin-right:auto;--button_margin-left:auto;width:calc(100% - auto - auto);\" target=\"_self\" href=\"https:\/\/daniel.com\/?page_id=340\"><span class=\"fusion-button-text\">Request a Quote<\/span><i class=\"fa-angle-right fas button-icon-right\" aria-hidden=\"true\"><\/i><\/a><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column_inner fusion-builder-nested-column-1 fusion_builder_column_inner_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:90px;--awb-padding-bottom:10px;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1216.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column daniel-tabs\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-tabs fusion-tabs-1 classic vertical-tabs icon-position-left mobile-mode-accordion\" style=\"--awb-title-border-radius-top-left:0px;--awb-title-border-radius-top-right:0px;--awb-title-border-radius-bottom-right:0px;--awb-title-border-radius-bottom-left:0px;--awb-inactive-color:var(--awb-color1);--awb-background-color:var(--awb-color1);--awb-border-color:var(--awb-color3);--awb-active-border-color:#ac1a2f;\"><div class=\"nav\"><ul class=\"nav-tabs\" role=\"tablist\"><li class=\"active\" role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-7a2c504f2a6e389d2d0\" aria-selected=\"true\" id=\"fusion-tab-specifications\" href=\"#tab-7a2c504f2a6e389d2d0\"><h4 class=\"fusion-tab-heading\">Specifications<\/h4><\/a><\/li><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-3f4583c2a7dca5e8b8b\" aria-selected=\"false\" tabindex=\"-1\" id=\"fusion-tab-features\" href=\"#tab-3f4583c2a7dca5e8b8b\"><h4 class=\"fusion-tab-heading\">Features<\/h4><\/a><\/li><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-fb65bbf4d7c0b18c4a1\" aria-selected=\"false\" tabindex=\"-1\" id=\"fusion-tab-documentsanddrawings\" href=\"#tab-fb65bbf4d7c0b18c4a1\"><h4 class=\"fusion-tab-heading\">Documents and Drawings<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-content\"><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs\" role=\"tablist\"><li class=\"active\" role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-7a2c504f2a6e389d2d0\" aria-selected=\"true\" id=\"mobile-fusion-tab-specifications\" href=\"#tab-7a2c504f2a6e389d2d0\"><h4 class=\"fusion-tab-heading\">Specifications<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix in active\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-specifications\" id=\"tab-7a2c504f2a6e389d2d0\">\n<div class=\"specs-table\">\n<table width=\"100%\">\n<tbody>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Mechanical Ratings<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">Standard: 2-in to 8-in, ANSI 600-2500<\/p>\n<p>Consult factory for other options<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Flange Face And End Connections<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">Standard: Raised face weldnek and ring-joint weldnek<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Assembly<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">Carbon Steel: furnished complete with studs (ASTM A-193 GR B7), nuts (ASTM A-194 GR 2H), (2) 0.0625-in non-asbestos gaskets and (2) jackscrews<\/p>\n<p>Stainless Steel: furnished complete with zinc plated studs (ASTM A-193 GR B7), nuts (ASTM A-194 GR 2H), (2) 0.0625-in non-asbestos gaskets and (2) jackscrews<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Differential Pressure Taps<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\"><strong>Location and number of tap holes<\/strong><\/p>\n<ul>\n<li>Standard: 2 tap holes with orientation on top and bottom 180 deg apart, in accordance with API 14.3 (AGA3) or ISO 5167<\/li>\n<li>Consult factory for other tap location and number of tap options<\/li>\n<\/ul>\n<p><strong>Process connection<\/strong><\/p>\n<ul>\n<li>Standard: .50-in NPT standard<\/li>\n<li>Consult factory for other options<\/li>\n<\/ul>\n<p><strong>Types of tap connections<\/strong><\/p>\n<ul>\n<li>Standard: Threaded<\/li>\n<li>Optional: Socket weld<\/li>\n<li>Consult factory for other options<\/li>\n<\/ul>\n<p><strong>Line bore tolerances<\/strong><\/p>\n<ul>\n<li>Standard size: Sch 40 and 80<\/li>\n<li>Consult factory for other options<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Temperature Range<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">Standard: -20\u00b0F to +250\u00b0F (-29\u00b0C to +121\u00b0C)<\/p>\n<p>Standard (low temperature): -100\u00b0F to +250\u00b0F (-73\u00b0C to +121\u00b0C)<\/p>\n<p>Consult factory for other options<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Material Specifications<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">Standard: A105 Carbon Steel and A350 LF-2 (low temperature applications)<\/p>\n<p>Consult factory for other options<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Flow Measurement Code<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">API 14.3<\/p>\n<p>ISO-5167<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Design Code<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">ASME B16.36<\/td>\n<\/tr>\n<tr>\n<td class=\"specs-table-lt\" align=\"right\"><strong>Gaskets<\/strong><\/td>\n<td class=\"specs-table-rt\" align=\"left\">Standard gaskets for RF flanges are 0.625-in thick. (0.125-in thick gaskets are available as an option.)<\/p>\n<ul>\n<li>Grafoil gasket<\/li>\n<li>Spiral wound gasket without inner ring<\/li>\n<li>Garlock gylon<\/li>\n<li>Spiral wound gasket with inner ring<\/li>\n<\/ul>\n<p>RTJ Flanges use Daniel model 560 or 590 style plate holders. The plate holder is designed with an equivalent ring gasket to match the R-number based on size and pressure class.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs\" role=\"tablist\"><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-3f4583c2a7dca5e8b8b\" aria-selected=\"false\" tabindex=\"-1\" id=\"mobile-fusion-tab-features\" href=\"#tab-3f4583c2a7dca5e8b8b\"><h4 class=\"fusion-tab-heading\">Features<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-features\" id=\"tab-3f4583c2a7dca5e8b8b\">\n<ul>\n<li><strong>Bore Tolerances<\/strong> are well within the latest recommendations of API-14.3.<\/li>\n<li><strong>Pressure Tap Hole Location<\/strong> is closely controlled. Tap hole centers are 0.938-in from bearing faces of raised face flanges, placing their centerline 1-in from the face of the orifice plate when 0.063-in gasket thickness is included.\n<ul>\n<li>1. For 3-in and smaller flanges, tap location tolerance is \u00b1 0.016-in.<\/li>\n<li>2. For 4-in and larger flanges, tap location tolerance is \u00b1 0.031-in.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Pressure Tap Holes<\/strong> \u2013 Tap hole edges on the flange bore surface are carefully inspected to be free from burrs. All roughness is eliminated. Sizes are shown in the following tables.<\/li>\n<li><strong>Flange Tap Connections<\/strong> &#8211; Standard connections are .50-in NPT. Other sizes and types are available on request.<\/li>\n<li><strong>Gaskets<\/strong> &#8211; Two 0.063-in thick(1) precision die-cut gaskets are furnished with all raised face orifice flanges. Non-asbestos gaskets are standard.<\/li>\n<li><strong>Dowel pins:<\/strong> Alignment dowel pins of the knock-out type are furnished as standard on all 2-in to 8-in raised face orifice flanges. These dowel pins assure correct alignment of the flange bores as well as centering the orifice plate bore to the flange bores within the tolerances of API-14.3.<\/li>\n<\/ul>\n<\/div><div class=\"nav fusion-mobile-tab-nav\"><ul class=\"nav-tabs\" role=\"tablist\"><li role=\"presentation\"><a class=\"tab-link\" data-toggle=\"tab\" role=\"tab\" aria-controls=\"tab-fb65bbf4d7c0b18c4a1\" aria-selected=\"false\" tabindex=\"-1\" id=\"mobile-fusion-tab-documentsanddrawings\" href=\"#tab-fb65bbf4d7c0b18c4a1\"><h4 class=\"fusion-tab-heading\">Documents and Drawings<\/h4><\/a><\/li><\/ul><\/div><div class=\"tab-pane fade fusion-clearfix\" role=\"tabpanel\" tabindex=\"0\" aria-labelledby=\"fusion-tab-documentsanddrawings\" id=\"tab-fb65bbf4d7c0b18c4a1\"><strong>Downloadable PDF<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/daniel.com\/wp-content\/uploads\/2022\/10\/Daniel-Orifice-Flange-Unions-Datasheet.pdf\" target=\"_blank\" rel=\"noopener\"><i class=\"fb-icon-element-1 fb-icon-element fontawesome-icon fa-file-pdf fas circle-no fusion-text-flow\" style=\"--awb-iconcolor:var(--awb-color4);--awb-iconcolor-hover:var(--awb-color3);--awb-font-size:18px;--awb-margin-right:9px;\"><\/i> Daniel Orifice Flange Unions Data Sheet<\/a><\/li>\n<\/ul>\n<\/div><\/div><\/div>\n<div class=\"table-2 turn-off\">\n<table width=\"100%\">\n<tbody>\n<tr>\n<td align=\"right\"><strong>Line Size<\/strong><\/td>\n<td align=\"left\">DN50 to DN200 (2-in to 8-in)<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Fluid Type<\/strong><\/td>\n<td align=\"left\">Liquid<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Operating Temperature Range<\/strong><\/td>\n<td align=\"left\">-29\u00ba C to +66\u00ba C (-20\u00ba F to +150\u00ba F)<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Operating Pressure Range<\/strong><\/td>\n<td align=\"left\">ANSI 150 to 300<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Materials: Valve Body<\/strong><\/td>\n<td align=\"left\">Carbon Steel, ASTM A352 GR LCC<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Materials: Valve Cylinder<\/strong><\/td>\n<td align=\"left\">DN50 to DN 200 (2-in to 4-in): Stainless Steel, ANSI 150 to 600; DN250 to DN 300 (6-in to 8-in) Carbon Steel, Nickel Coated, ANSI 150 to 600<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Materials: Valve Piston<\/strong><\/td>\n<td align=\"left\">Standard: Stainless Steel<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Materials: Seat Ring<\/strong><\/td>\n<td align=\"left\">DN50 to DN200 (2-in to 6-in) Stainless Steel; DN300 (8-in) Carbon Steel, Nickel Coated<\/td>\n<\/tr>\n<tr>\n<td align=\"right\"><strong>Materials: O-Rings<\/strong><\/td>\n<td align=\"left\">Standard: Viton; Optional: Neoprene, EPR, Kalrez \/ Teflon AP (Aggressive Products)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":12,"featured_media":0,"parent":2704,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-3420","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Orifice Flange Unions - Daniel Measurement &amp; 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