Homes built before the 1960s often relied on black iron pipes for gas and water delivery. While they share similarities with steel, black malleable iron fittings—such as those manufactured by Jizhong—are designed with improved flexibility and easier installation in mind. These fittings can withstand mechanical stress and are especially favored for gas lines due to https://archpipes.com/news/company-blogs-en/understanding-the-role-of-black-malleable-iron-fittings-in-modern-piping-systems/