"泥浆输送管" can be translated into English as "slurry delivery pipe" or "slurry transport pipe".
"Slurry" refers to a mixture of solid particles suspended in a liquid, typically water, which is commonly used to describe mud or similar substances in engineering contexts.
"Delivery pipe" or "transport pipe" both convey the idea of a conduit for conveying or transporting the slurry from one place to another.
Both translations are accurate and commonly used in relevant industries.