The dimensions of an equal tee will vary depending on the pipe size and pressure rating. Typically, the length of the run (the straight portion of the tee) is the same as the diameter of the pipe, while the outlets are typically half the diameter of the run.

Tees are typically classified based on their pressure rating and material composition. Some common classes of tee include standard weight, extra strong, and double extra strong.

There are two main types of tees used in piping: equal tees and reducing tees. Equal tees have three outlets of the same size, while reducing tees have one outlet of a different size than the other two.

An equal tee has three identical-sized outlets, while a reducing tee has one outlet that is smaller than the other two. Equal tees are typically used in systems where fluid flow needs to be equally distributed among three branches, whereas reducing tees are used to join pipes with different diameters or where the fluid flow needs to be diverted to

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A 90d elbow refers to an elbow with a bending angle of 90 degrees. It is typically used to change the direction of flow in a piping system.

An 8D bend refers to a bend with a bending radius of eight times the nominal diameter of the pipe it is being connected to. For example, an 8D bend for a 4-inch pipe would have a bending radius of 32 inches.

A 6D elbow refers to an elbow with a bending radius of six times the nominal diameter of the pipe it is being connected to. For example, a 6D elbow for a 4-inch pipe would have a bending radius of 24 inches.

A 5D elbow refers to an elbow with a bending radius of five times the nominal diameter of the pipe it is being connected to. For example, a 5D elbow for a 4-inch pipe would have a bending radius of 20 inches.

A 1 D bend refers to a bend with a bending radius equal to the nominal diameter of the pipe it is being connected to. For example, a 1 D bend for a 4-inch pipe would have a bending radius of 4 inches.

An elbow 3D refers to an elbow with a bending radius of three times the nominal diameter of the pipe it is being connected to. For example, a 3D elbow for a 4-inch pipe would have a bending radius of 12 inches.