What type of elbow covering is generally used on large pipes?

The choice of mitred elbows as the correct answer is based on their design and functionality in large piping systems. Mitred elbows are created by cutting and joining two pieces of pipe at an angle, which helps to maintain a smooth flow of fluid and minimize turbulence. This aspect is particularly important for large pipes, as it assists in managing pressure and flow more efficiently.

Additionally, mitred elbows often provide structural integrity and durability that is beneficial in high-stress environments commonly associated with large piping systems. They can also be effectively insulated or covered with materials as required, ensuring thermal efficiency and protection from external elements.

In contrast, the other options, such as perforated sheets and insulated blankets, are typically used for different applications and do not serve as the primary type of elbow covering for large pipes. Perforated sheets are often utilized for ventilation or soundproofing purposes rather than as a primary connection type in plumbing. Insulated blankets, while useful for thermal insulation, do not function as an elbow or fitting themselves.

Fiberglass jackets would generally be used for insulation purposes but not as an elbow covering in the way mitred elbows play a role in piping systems. The design and function of mitred elbows specifically align with the requirements of large pipe systems, making