{"id":1063,"date":"2026-04-23T20:05:08","date_gmt":"2026-04-24T00:05:08","guid":{"rendered":"https:\/\/www.songhaiflange.com\/?p=1063"},"modified":"2026-04-23T20:05:29","modified_gmt":"2026-04-24T00:05:29","slug":"ansi-class-150-flange-dimensions-pdf-threaded-small-bore-pipe-guide","status":"publish","type":"post","link":"https:\/\/www.songhaiflange.com\/pa\/2026\/04\/23\/ansi-class-150-flange-dimensions-pdf-threaded-small-bore-pipe-guide\/","title":{"rendered":"ANSI Class 150 Flange Dimensions PDF Threaded Small Bore Pipe Guide"},"content":{"rendered":"<h2>ANSI Class 150 Flange Dimensions Complete Reference<\/h2>\n<p>ANSI Class 150 flanges are the most widely used flange type in industrial piping. This guide provides complete dimensional data, PDF references, and selection information for engineers and procurement professionals.<\/p>\n<h3>Class 150 Flange Overview<\/h3>\n<p>ANSI\/ASME B16.5 Class 150 flanges are designed for low to medium pressure applications:<\/p>\n<h4>Pressure Rating<\/h4>\n<ul>\n<li>Maximum working pressure: 285 psi at ambient temperature<\/li>\n<li>Hydrostatic test pressure: 450 psi<\/li>\n<li>Temperature range: -20\u00b0F to 800\u00b0F (-29\u00b0C to 427\u00b0C)<\/li>\n<li>Pressure decreases at elevated temperatures<\/li>\n<\/ul>\n<h4>Common Materials<\/h4>\n<ul>\n<li>Carbon Steel: ASTM A105, A350 LF2<\/li>\n<li>Stainless Steel: A182 F304\/304L, F316\/316L<\/li>\n<li>Alloy Steel: A182 F11, F22, F91<\/li>\n<li>Duplex: A182 F51, F53<\/li>\n<\/ul>\n<h3>Complete Dimension Tables<\/h3>\n<h4>NPS 1\/2 to NPS 24 Class 150 Dimensions<\/h4>\n<table>\n<tr>\n<th>\u0a10\u0a28.\u0a2a\u0a40.\u0a10\u0a38.<\/th>\n<th>\u0a21\u0a40\u0a10\u0a28<\/th>\n<th>\u0a13.\u0a21\u0a40.<\/th>\n<th>BC<\/th>\n<th>\u0a2c\u0a4b\u0a32\u0a1f<\/th>\n<th>Hole<\/th>\n<th>Thick<\/th>\n<\/tr>\n<tr>\n<td>1\/2<\/td>\n<td>15<\/td>\n<td>3.50<\/td>\n<td>2.38<\/td>\n<td>4<\/td>\n<td>0.62<\/td>\n<td>0.44<\/td>\n<\/tr>\n<tr>\n<td>3\/4<\/td>\n<td>20<\/td>\n<td>3.88<\/td>\n<td>2.75<\/td>\n<td>4<\/td>\n<td>0.62<\/td>\n<td>0.50<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>25<\/td>\n<td>4.25<\/td>\n<td>3.12<\/td>\n<td>4<\/td>\n<td>0.62<\/td>\n<td>0.56<\/td>\n<\/tr>\n<tr>\n<td>1.1\/4<\/td>\n<td>32<\/td>\n<td>4.62<\/td>\n<td>3.50<\/td>\n<td>4<\/td>\n<td>0.62<\/td>\n<td>0.56<\/td>\n<\/tr>\n<tr>\n<td>1.1\/2<\/td>\n<td>40<\/td>\n<td>5.00<\/td>\n<td>3.88<\/td>\n<td>4<\/td>\n<td>0.62<\/td>\n<td>0.62<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>50<\/td>\n<td>6.00<\/td>\n<td>4.75<\/td>\n<td>4<\/td>\n<td>0.75<\/td>\n<td>0.62<\/td>\n<\/tr>\n<tr>\n<td>2.1\/2<\/td>\n<td>65<\/td>\n<td>7.00<\/td>\n<td>5.50<\/td>\n<td>4<\/td>\n<td>0.75<\/td>\n<td>0.69<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>80<\/td>\n<td>7.50<\/td>\n<td>6.00<\/td>\n<td>4<\/td>\n<td>0.75<\/td>\n<td>0.75<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>100<\/td>\n<td>9.00<\/td>\n<td>7.50<\/td>\n<td>8<\/td>\n<td>0.75<\/td>\n<td>0.81<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>125<\/td>\n<td>10.00<\/td>\n<td>8.50<\/td>\n<td>8<\/td>\n<td>0.75<\/td>\n<td>0.88<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>150<\/td>\n<td>11.00<\/td>\n<td>9.50<\/td>\n<td>8<\/td>\n<td>0.88<\/td>\n<td>0.94<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>200<\/td>\n<td>13.50<\/td>\n<td>11.75<\/td>\n<td>8<\/td>\n<td>0.88<\/td>\n<td>1.06<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>250<\/td>\n<td>16.00<\/td>\n<td>14.25<\/td>\n<td>12<\/td>\n<td>0.88<\/td>\n<td>1.12<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>300<\/td>\n<td>19.00<\/td>\n<td>17.00<\/td>\n<td>12<\/td>\n<td>1.00<\/td>\n<td>1.12<\/td>\n<\/tr>\n<tr>\n<td>14<\/td>\n<td>350<\/td>\n<td>21.00<\/td>\n<td>18.75<\/td>\n<td>12<\/td>\n<td>1.12<\/td>\n<td>1.19<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td>400<\/td>\n<td>23.50<\/td>\n<td>21.25<\/td>\n<td>16<\/td>\n<td>1.12<\/td>\n<td>1.31<\/td>\n<\/tr>\n<tr>\n<td>18<\/td>\n<td>450<\/td>\n<td>25.00<\/td>\n<td>22.75<\/td>\n<td>16<\/td>\n<td>1.25<\/td>\n<td>1.44<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>500<\/td>\n<td>27.50<\/td>\n<td>25.00<\/td>\n<td>20<\/td>\n<td>1.25<\/td>\n<td>1.56<\/td>\n<\/tr>\n<tr>\n<td>24<\/td>\n<td>600<\/td>\n<td>32.00<\/td>\n<td>29.50<\/td>\n<td>20<\/td>\n<td>1.38<\/td>\n<td>1.69<\/td>\n<\/tr>\n<\/table>\n<p>Note: All dimensions in inches. OD=Outside Diameter, BC=Bolt Circle, Hole=Bolt Hole Diameter, Thick=Flange Thickness<\/p>\n<h3>Threaded Flange for Small Bore Pipe<\/h3>\n<p>Threaded flanges are ideal for small diameter piping where welding is impractical:<\/p>\n<h4>Size Range<\/h4>\n<ul>\n<li>Available: NPS 1\/2 to NPS 4 (DN15 to DN100)<\/li>\n<li>Pressure classes: 150, 300, 600, 900, 1500, 2500<\/li>\n<li>Thread types: NPT, BSP, PT<\/li>\n<\/ul>\n<h4>\u0a32\u0a3e\u0a17\u0a42\u0a06\u0a02<\/h4>\n<ul>\n<li>Instrument connections<\/li>\n<li>Sample points<\/li>\n<li>Drain and vent lines<\/li>\n<li>Temporary installations<\/li>\n<li>Hazardous areas (no hot work)<\/li>\n<li>Compressed air systems<\/li>\n<li>Water distribution<\/li>\n<\/ul>\n<h4>Installation Tips<\/h4>\n<ol>\n<li>Clean threads on both flange and pipe<\/li>\n<li>Apply PTFE tape or thread compound<\/li>\n<li>Hand-tighten first, then wrench<\/li>\n<li>Leave 1-2 threads exposed<\/li>\n<li>Do not overtighten<\/li>\n<\/ol>\n<h3>Flange Repair and Machining Service<\/h3>\n<p>Professional repair services extend flange life and reduce replacement costs:<\/p>\n<h4>Repair Capabilities<\/h4>\n<ul>\n<li><strong>Face Resurfacing:<\/strong> Repair damaged sealing surfaces<\/li>\n<li><strong>Bore Machining:<\/strong> Restore proper pipe fit<\/li>\n<li><strong>Bolt Hole Repair:<\/strong> Fix stripped or damaged holes<\/li>\n<li><strong>Weld Overlay:<\/strong> Build up worn surfaces<\/li>\n<li><strong>Re-drilling:<\/strong> Modify bolt patterns<\/li>\n<\/ul>\n<h4>When to Repair vs Replace<\/h4>\n<ul>\n<li>Minor surface damage: Repair<\/li>\n<li>Severe corrosion: Replace<\/li>\n<li>Cracked flange: Replace<\/li>\n<li>Dimensional out of tolerance: Repair or replace<\/li>\n<\/ul>\n<h3>Carbon Steel Flange Suppliers<\/h3>\n<p>Finding reliable suppliers ensures quality and competitive pricing:<\/p>\n<h4>Supplier Selection Criteria<\/h4>\n<ol>\n<li>Manufacturing capabilities and certifications<\/li>\n<li>Material traceability (MTR available)<\/li>\n<li>Quality control procedures<\/li>\n<li>Production capacity and lead times<\/li>\n<li>Export experience and references<\/li>\n<li>After-sales support<\/li>\n<\/ol>\n<h4>Price Indicators<\/h4>\n<ul>\n<li>Raw material costs (steel prices)<\/li>\n<li>Manufacturing complexity<\/li>\n<li>Surface treatment requirements<\/li>\n<li>Quantity and size<\/li>\n<li>Certification requirements<\/li>\n<\/ul>\n<h3>Stainless Steel Flange Manufacturers by Country<\/h3>\n<h4>Major Manufacturing Regions<\/h4>\n<ul>\n<li><strong>China:<\/strong> Largest producer, competitive pricing<\/li>\n<li><strong>India:<\/strong> Growing capacity, good quality<\/li>\n<li><strong>Italy:<\/strong> Premium quality, higher cost<\/li>\n<li><strong>USA:<\/strong> Domestic supply, quick delivery<\/li>\n<li><strong>Japan:<\/strong> High precision, excellent quality<\/li>\n<\/ul>\n<h3>Corrosion Resistant Flange for Marine Use<\/h3>\n<p>Marine environments require superior corrosion resistance:<\/p>\n<h4>Recommended Materials<\/h4>\n<ul>\n<li>316\/316L: General marine applications<\/li>\n<li>2205 Duplex: Offshore platforms<\/li>\n<li>2507 Super Duplex: Severe conditions<\/li>\n<li>904L: Chemical tankers<\/li>\n<li>Aluminum Bronze: Propeller shafts<\/li>\n<\/ul>\n<h4>Protective Measures<\/h4>\n<ul>\n<li>Cathodic protection systems<\/li>\n<li>Protective coatings<\/li>\n<li>Regular inspection and maintenance<\/li>\n<li>Sacrificial anodes<\/li>\n<\/ul>\n<h3>Download Resources<\/h3>\n<ul>\n<li>ASME B16.5 dimension charts (PDF)<\/li>\n<li>Material selection guides<\/li>\n<li>Installation procedures<\/li>\n<li>Inspection checklists<\/li>\n<\/ul>\n<p>Songhai Flange supplies ANSI Class 150 flanges in all sizes with complete dimensional certification. Threaded flanges available for small bore applications. Contact us for repair services and marine-grade corrosion resistant options.<\/p>","protected":false},"excerpt":{"rendered":"<p>ANSI Class 150 Flange Dimensions Complete Reference ANSI Class 150 flanges are the most widely used flange type in industrial piping. This guide provides complete dimensional data, PDF references, and selection information for engineers and procurement professionals. Class 150 Flange Overview ANSI\/ASME B16.5 Class 150 flanges are designed for low to medium pressure applications: Pressure [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[81,66,72,70,104],"class_list":["post-1063","post","type-post","status-publish","format-standard","hentry","category-blog","tag-ansi","tag-flange","tag-rating","tag-standard","tag-threaded"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/posts\/1063","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/comments?post=1063"}],"version-history":[{"count":1,"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/posts\/1063\/revisions"}],"predecessor-version":[{"id":1064,"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/posts\/1063\/revisions\/1064"}],"wp:attachment":[{"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/media?parent=1063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/categories?post=1063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.songhaiflange.com\/pa\/wp-json\/wp\/v2\/tags?post=1063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}