{"product_id":"armstrong-104301-011-flange-cast-iron-1-1-2-npt","title":"Armstrong 104301-011 Flange Cast Iron 1-1\/2\" NPT","description":"\u003cp\u003eThis heavy‑duty cast‑iron flange provides a secure, leak‑free seal for 1‑1\/2\" NPT pipe connections in commercial and industrial heating systems. It is fully compatible with Armstrong equipment and replaces the original \u003cstrong\u003e104301-011\u003c\/strong\u003e part.\u003c\/p\u003e\u003cp\u003eThe flange’s precision‑milled faceplate mates directly with the pipe’s thread, creating a metal‑to‑metal interface that distributes pressure evenly, while the integrated gasket seat ensures a tight seal even under high‑temperature cycles.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Durability:\u003c\/strong\u003e Cast iron construction resists corrosion and thermal stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size:\u003c\/strong\u003e 1‑1\/2\" NPT thread matches standard pipe dimensions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Rating:\u003c\/strong\u003e Engineered for up to 150 psi in closed‑loop systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e Operates reliably from -20°F to 250°F.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Suitable for boiler return lines, hot‑water heating loops, chilled water systems, and retrofits of aging pipework.\u003c\/p\u003e","brand":"Armstrong","offers":[{"title":"Default Title","offer_id":43118365212766,"sku":"104301-011","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/104301_011_image_2b79884a-2d10-4630-82d2-1bbcc41a6627.jpg?v=1785971807","url":"https:\/\/nationalboilersupply.com\/products\/armstrong-104301-011-flange-cast-iron-1-1-2-npt","provider":"National Boiler Supply","version":"1.0","type":"link"}