{"product_id":"threaded-flange-4-inch-class-150-raised-face-rf","title":"Threaded Flange – 4\" Class 150 Raised Face (RF)","description":"\u003cp data-path-to-node=\"4\"\u003eThe 4\" Class 150 Raised Face (RF) Slip-On Flange is a highly versatile, heavy-duty forged piping component designed to securely connect pipes, valves, pumps, and other essential equipment within low-to-moderate pressure industrial networks. Rated for Class 150 applications, this 4-inch flange provides a reliable, permanent connection that is easier to align and install than traditional weld-neck flanges, making it an incredibly cost-effective solution for standard fluid transfer systems.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eUnlike weld-neck flanges that require a precision butt-weld, a slip-on flange is designed to literally \"slip over\" the outside of the pipe. Once properly aligned, the flange is secured using two fillet welds—one on the outside hub and one on the inside bore. This double-welded construction provides ample mechanical strength and leak-proof integrity for standard utility lines, cooling systems, and low-pressure processing environments, while allowing for slight inaccuracies in pipe cutting during the fabrication process.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eThis specific flange features a \u003cb data-path-to-node=\"6\" data-index-in-node=\"32\"\u003eRaised Face (RF)\u003c\/b\u003e profile. The sealing surface is machined to sit slightly higher than the bolting circle. When the bolts are tightened, this elevated face concentrates the mechanical pressure onto a smaller gasket area. This localized compression creates an exceptionally tight, high-integrity seal designed to contain liquids and gases safely, drastically reducing the risk of flange-face blowouts. Manufactured from premium forged steel, it conforms strictly to ASME \/ ANSI B16.5 standards.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eFeatures \u0026amp; Benefits\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eSlip-On Design:\u003c\/b\u003e Slides easily over the pipe for rapid alignment and fit-up, significantly reducing fabrication time and lowering installation costs compared to weld-neck alternatives.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eClass 150 Pressure Rating:\u003c\/b\u003e Engineered to safely handle low-to-moderate internal pressures, making it ideal for standard utility, water, and low-pressure hydrocarbon lines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eRaised Face (RF) Profile:\u003c\/b\u003e The elevated sealing face concentrates gasket compression, maximizing seal integrity and eliminating the risk of leaks under operational vibration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eDouble Fillet Weld Securement:\u003c\/b\u003e Designed to be welded on both the inner diameter and the outer hub, ensuring structural rigidity and dependable fluid containment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eASME B16.5 Compliant:\u003c\/b\u003e Machined to strict industry tolerances to guarantee a perfect face-to-face fit with standard mating equipment and piping networks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003eSpecifications \u0026amp; Technical Details\u003c\/b\u003e\u003c\/p\u003e\n\u003ctable data-path-to-node=\"10\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,1,0,0\"\u003e\u003cb data-path-to-node=\"10,1,0,0\" data-index-in-node=\"0\"\u003eComponent Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,1,1,0\"\u003eSlip-On Flange (SO)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,2,0,0\"\u003e\u003cb data-path-to-node=\"10,2,0,0\" data-index-in-node=\"0\"\u003eSize\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,2,1,0\"\u003e4 Inch (Nominal Pipe Size)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,3,0,0\"\u003e\u003cb data-path-to-node=\"10,3,0,0\" data-index-in-node=\"0\"\u003ePressure Class\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,3,1,0\"\u003eClass 150 (150#)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,4,0,0\"\u003e\u003cb data-path-to-node=\"10,4,0,0\" data-index-in-node=\"0\"\u003eFace Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,4,1,0\"\u003eRaised Face (RF)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,5,0,0\"\u003e\u003cb data-path-to-node=\"10,5,0,0\" data-index-in-node=\"0\"\u003eMaterial\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,5,1,0\"\u003eHigh-Strength Forged Carbon Steel \/ Alloy Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,6,0,0\"\u003e\u003cb data-path-to-node=\"10,6,0,0\" data-index-in-node=\"0\"\u003eIndustry Standard\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,6,1,0\"\u003eASME \/ ANSI B16.5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,7,0,0\"\u003e\u003cb data-path-to-node=\"10,7,0,0\" data-index-in-node=\"0\"\u003eService Application\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"10,7,1,0\"\u003eStandard Service (Water transfer, low-pressure mud lines, cooling systems, and general utility)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eApplications\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003eThis 4-inch Class 150 RF slip-on flange is a highly adaptable component used extensively across surface operations and industrial facilities. Typical applications include low-pressure water and fluid transfer manifolds, cooling water lines, standard mud tank piping, compressed air networks, pump suction headers, and general oilfield routing where severe high pressure is not a primary factor.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eQuality Assurance\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003eAll our industrial flanges are manufactured from premium forged steel and subjected to strict quality control processes. Each slip-on flange undergoes rigorous dimensional inspection, precision face machining verification, and non-destructive testing (NDT) to ensure absolute structural integrity and defect-free sealing surfaces. Full material test reports (MTRs) are available upon request to guarantee full compliance with ASME and ANSI industry standards.\u003c\/p\u003e\n\u003cp data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eRequest a Quote\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"16\"\u003e📞 +1 405 666 5011\u003c\/p\u003e\n\u003cp data-path-to-node=\"16\"\u003e📧 seo@blazess.com\u003c\/p\u003e","brand":"Blaze Sales \u0026 Service","offers":[{"title":"Default Title","offer_id":48243506544885,"sku":"FL-4150T","price":398.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0770\/5785\/1637\/files\/4150_THREADEDFLANGE.png?v=1780950678","url":"https:\/\/blazess.com\/ar\/products\/threaded-flange-4-inch-class-150-raised-face-rf","provider":"Blaze Sales \u0026 Service","version":"1.0","type":"link"}