What characteristic makes cast iron pipe popular for commercial use?

Cast iron pipe is favored in commercial applications due to its robust strength. This durability allows it to withstand heavy loads and stresses associated with various installations, such as in buildings or infrastructure where constant pressure and potential impact are concerns. Cast iron is capable of enduring high levels of vibration and thermal expansion, which can occur in commercial environments. Its strength attributes also contribute to its longevity, reducing the need for frequent replacements or repairs, which makes it a reliable choice for plumbing systems in commercial settings.

Other characteristics like cost savings or corrosion resistance might enhance its appeal, but the defining factor in its popularity is the exceptional strength it offers, making it suitable for demanding commercial uses.