There are many common types of pipe fittings, including elbows, reducers, tees, crosses, reducers, flanges, pipe caps, pipe sleeves, etc. These common pipe fitting types will be introduced in detail below.

Elbow: An elbow is a pipe fitting used to change the direction of a pipeline. Common elbow types include long elbow, short elbow, 90 degree elbow, 45 degree elbow, etc. Elbows are generally divided into long elbows and short elbows according to their bending radius, and into 90-degree elbows and 45-degree elbows according to their angles.

Reducer: A reducer is a pipe fitting that connects pipes of different sizes. Common types of reducers include equal-diameter reducers and eccentric reducers. The diameter of both ends of the equal-diameter reducer is the same, but the diameter of the middle pipe section is different; while the diameter of the eccentric reducer is different from the diameter of the two ends and the diameter of the middle pipe section, so that the direction of the pipe can have an eccentric angle.

Tee: A tee is a fitting that divides a pipe into two or more branches. Common types of tees include equal-diameter tees, equal-diameter tees, and reducing tees. The three channels of the equal-diameter tee are the same size, while the three channels and branches of the equal-diameter tee are the same size, but the sizes of the main lines connected to them are different; the reducing tee is the size of one of the three channels. Different dimensions than the other two channels.

Cross: A cross is a pipe fitting that divides a pipe into three or more branches. Common types of crosses include equal-diameter crosses, equal-diameter crosses, and reducing-diameter crosses. The four channels of the equal-diameter cross are of the same size, while the four channels and branches of the equal-diameter cross are of the same size, but the sizes of the main lines connected to them are different; the reducing cross is one or more of the four channels. The dimensions of a channel are different from the dimensions of other channels.

Reducing pipe: A reducing pipe is a pipe fitting whose diameter can be changed. Common types of reducers include tapered reducers and flared reducers. A tapered reducer refers to a pipe whose diameter gradually becomes smaller or larger, forming a tapered pipe; a flared reducer refers to a pipe whose diameter gradually expands from small to large, forming a flared pipe.

Flange: A flange is a pipe fitting that connects pipes and equipment. Common flange types include flat welding flange, butt welding flange, threaded flange, horizontal welding flange, etc. Flat welding flange is to connect two pipes or equipment together by flat welding; butt welding flange is to connect two pipes or equipment together by butt welding; threaded flange is to connect two pipes or equipment with threads. Pipes or equipment are connected together; horizontal welding flanges connect pipes or equipment together through horizontal welding.

Pipe Cap: A pipe cap is a pipe fitting that seals a pipe. Common types of pipe caps include flat head pipe caps, spherical pipe caps, round head pipe caps, etc. The flat-head cap has a flat bottom and can completely block the pipe; the spherical cap is spherical and can only partially block the pipe; the round-head cap is conical and can be connected to other pipe fittings and seal the pipe.

Pipe Sleeve: A pipe sleeve is a pipe fitting that connects pipes. Common types of pipe sleeves include copper pipe sleeves, steel pipe sleeves, cast iron pipe sleeves, etc. Pipe sleeves are usually used to connect pipes of different materials and can be connected to the pipes by welding, threading or other methods.

The above is an introduction to common types of pipe fittings, including elbows, reducers, tees, crosses, reducers, flanges, pipe caps, pipe sleeves, etc. These pipe fitting types play different roles in engineering use and can meet the requirements of different pipelines.