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The document sets surface cleanliness limits (no galvanizing, plating, oil, grease, scale, or removable foreign material) and quality standards for castings, plates, and pipe. It details minimum plate thickness and weight per square foot, pipe and flange types, bolt-hole alignment, welding and grinding expectations, dimensional tolerances for vessels and piping, and construction practices to ensure structural strength, smoothness, and correct fit.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/metal-fabrication-specification-for-metal-intended-to-be-rubber-lined-section-8/648653/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/metal-fabrication-specification-for-metal-intended-to-be-rubber-lined-section-8/648653.png","ImageObject",300,407,{"name":92,"@type":93},"Maya Linwood","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-27","2026-10-23",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What surface condition must metals meet before rubber lining?","Question",{"text":112,"@type":113},"Surfaces must be free of galvanizing or other plating, oil and grease, and also free of scale and other foreign material not readily removed by sandblast or shotblast. Castings, when specified, must be smooth and free of porosity, defects, sand or blow holes.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What are the minimum plate thickness and weight per square foot?",{"text":117,"@type":113},"The specification lists minimums tied to thickness: 7/64” (4.375), 9/64” (5.625), 3/16” (7.50), 1/4” (10.2), 5/16” (12.5), 3/8” (15.0), and 1/2” (20.0).",{"name":119,"@type":110,"acceptedAnswer":120},"How must joints and welds be prepared when rubber is applied?",{"text":121,"@type":113},"All joints to be rubber covered must be continuous solid welds. Welds must be smooth and free of porosity, holes, high spots, lumps, pockets, or undercuts, with proper peening and grinding to eliminate porosity and sharp edges/high spots.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},648653,1793079412,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},962084928432,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","METAL FABRICATION  \nSCOPE  \nThis specification applies to all metal intended to be rubber lined. Metals furnished must conform to this specification with respect to suitability for rubber lining or covering.  \nMATERIAL  \na. The surfaces are to be free of galvanizing or other plating, oil and grease. The surface must also be free of scale and other foreign material not readily removed by sandblast or shotblast. Castings, when specified, are to be smooth and free of porosity, defects, sand or blow holes and other such imperfections.  \nb. All plates shall be flat, with no appreciable buckle or warpage. Sharp edges must be removed; burrs are not permissible. The thickness and weight per square foot shall be no less than the figures listed below:  \n\n| THICKNESS | WEIGHT PER FOOT |\n| --- | --- |\n| 7/64” | 4.375 |\n| 9/64” | 5.625 |\n| 3/16” | 7.50 |\n| 1/4” | 10.2 |\n| 5/16” | 12.5 |\n| 3/8” | 15.0 |\n| 1/2” | 20.0 |\n\nc. Pipe is to be standard weight, new welded or seamless steel to ASA schedule 30 to 40 unless otherwise specified. Wall gauge to be specified if not shown or called for on purchase order or drawings.  \nd. Flanges shall be flat faced, not raised, standard 150\\# forged steel slip-on, weld neck or boiler plate. 125\\# cast iron flanges or cast iron pipe  \n-are not recommended for rubber lining. If customer insists-they do so at their own risk.  \ne. Flanges on opposite ends of pipe are to have their bolt holes in exact alignment unless otherwise specified. Pipe ends at flange face are to be continuously welded and ground smooth. Rough burrs should be removed.  \nf. When cast steel domes and fittings are specified, they shall be free from porosity, sand holes and other foreign material.  \n[www.blairrubber.com](www.blairrubber.com)  \nSECTION 8: METAL FABRICATION  \nDIMENSIONS  \nUnless otherwise specified, dimensions for vessels are considered inside dimensions, for pipe, overall length end to end and for projecting fittings from outside of vessel surface to face of fitting, nozzle or flange.  \nTolerances shown below apply to individual parts and to overall dimensions when parts are made up from sections, when such tolerances are specified on the drawings.  \nStraight Pipe 24” or less Plus or minus 1/16”  \nStraight Pipe over 24” Plus or minus 1/8”  \nOther dimensions Plus or minus 1/8”  \nCONSTRUCTION  \na. Drawings that are attached to and are a part of the purchase order should prescribe requirements of metals to be rubber lined or covered. Materials shall be fabricated in accordance with good commercial practice.  \nb. All vessels shall be constructed with a minimum number of pieces. Rectangular tanks of the open top type shall be properly reinforced in accordance with accepted practice to provide adequate structural strength and to prevent bulging. Normally, a drawing or definite information showing required reinforcement will be furnished.  \nc. Companion angles of sectional vessels that are bolted together must be square, plumb and smooth with sections fitting exactly when bolted together. (Specified rubber thickness to be allowed in fabrication should such companion angles require rubber) . The open ends of sectional vessels shall be provided with suitable bracing so that they will not become distorted in transit and handling. Sectional vessels shall be permanently match-marked on spots that are not to be rubber covered to accurately indicate their position when assembled.  \nd. Unless otherwise specified, the necessary bolts, nuts and washers to complete any assembly are to be furnished by the metal supplier or fabricator.  \ne. Vessels with dished heads are to have the dished heads flanged in such a manner as to eliminate wrinkles and buckles.  \nf. Vessels subject to more than 10\\# working pressure must, when practical, have heads dished from one-piece plates. When, from necessity, heads are made up in sections, the sections are to be formed before welding together and must be of 20% greater thickness than specified for the one-piec","cbCaiitKGoDUALrK","https://ap.wps.com/l/cbCaiitKGoDUALrK","pdf",1243262,"English","# Scope\n# Material Requirements\n# Dimensions\n# Construction\n# Welding","[{\"question\":\"What surface condition must metals meet before rubber lining?\",\"answer\":\"Surfaces must be free of galvanizing or other plating, oil and grease, and also free of scale and other foreign material not readily removed by sandblast or shotblast. Castings, when specified, must be smooth and free of porosity, defects, sand or blow holes.\"},{\"question\":\"What are the minimum plate thickness and weight per square foot?\",\"answer\":\"The specification lists minimums tied to thickness: 7/64” (4.375), 9/64” (5.625), 3/16” (7.50), 1/4” (10.2), 5/16” (12.5), 3/8” (15.0), and 1/2” (20.0).\"},{\"question\":\"How must joints and welds be prepared when rubber is applied?\",\"answer\":\"All joints to be rubber covered must be continuous solid welds. Welds must be smooth and free of porosity, holes, high spots, lumps, pockets, or undercuts, with proper peening and grinding to eliminate porosity and sharp edges/high spots.\"}]","METAL FABRICATION - Specification for Metal Intended to be Rubber Lined - Section 8 | PDF",1792794426,15]