Mar. 15, 2023
There is no immutable law requiring manhole covers to be round-why should they be round? Although some sewer covers are square or rectangular, there types are rare and are generally only found in cases where there is a need for heavy equipment to go through them. View MoreFeb. 01, 2023
Ductile iron pipe is a kind of graphite-rich cast iron made of ductile cast iron, and its graphite has a spherical molecular structure. This molecular structure makes cast iron less brittle, more impact-resistant than other varieties, and has a flaky structure. View More