Their functions are vastly different. Pipe caps act like temporary masks for piping systems, primarily used for protection during construction or isolation of pipe openings during maintenance; they can be easily removed. End caps, on the other hand, are permanent bottom covers for pressure vessels, welded to the equipment as pressure-bearing components. The former prioritizes convenience, while the latter emphasizes sealing and pressure resistance.
The difference lies in their structural design. Pipe caps are mostly threaded or snap-fit, commonly made of lightweight materials like plastic and rubber, and are typically simple flat caps.
End caps must be made of the same metal material as the pipe, precision-stamped into streamlined curved surfaces such as ellipses or butterflies, with their thickness rigorously calculated.
The difference is determined by the application scenario. Pipe caps are commonly used on construction sites and maintenance sites, acting as temporary protection for pipe openings like band-aids. End caps are specifically designed for pressure equipment such as boilers and chemical tanks, serving as core components ensuring the safe operation of the equipment. The former is lower in cost and reusable, while the latter requires custom production using specialized equipment.
