Explosion-proof pipe is generally more expensive than glass. This is due to the specialized materials and manufacturing processes required to create explosion-proof pipes, which are designed to withstand high pressure and extreme conditions. Glass, while durable, does not possess the same level of resistance to explosions and is not typically used in applications where such protection is necessary.

According to a report by Grand View Research, the global explosion-proof pipe market was valued at USD 2.2 billion in 2019 and is expected to grow at a CAGR of 5.5% from 2020 to 2027. The high cost of explosion-proof pipe is attributed to the use of materials such as stainless steel, aluminum, and other alloys, which are more expensive than the raw materials used to produce glass. These materials are chosen for their ability to withstand high temperatures, pressure, and chemical exposure, which are common in environments where explosion-proof pipes are used.

Glass, on the other hand, is a widely available and relatively inexpensive material. It is commonly used in construction, windows, and various consumer products. The cost of glass is influenced by factors such as the type of glass, thickness, and processing techniques. For example, tempered glass, which is used in safety applications, is more expensive than regular glass due to the additional heat treatment process.

In terms of raw material costs, glass is typically cheaper than the metals used in explosion-proof pipe manufacturing. For instance, the price of steel, a common material for explosion-proof pipes, can vary significantly based on market conditions and the specific grade of steel required. The cost of glass, while variable, is generally lower than that of steel.

Additionally, the manufacturing process for explosion-proof pipe is more complex and requires specialized equipment. These pipes are often produced using techniques such as extrusion, bending, and welding, which add to the overall cost. Glass manufacturing, while also requiring specialized equipment, is generally less complex and can be produced on a larger scale, which helps to keep costs lower.

In conclusion, explosion-proof pipe is more expensive than glass due to the specialized materials, manufacturing processes, and the specific applications for which they are designed. The cost of explosion-proof pipe is influenced by factors such as the type of metal used, the complexity of the manufacturing process, and the demand for these pipes in high-risk environments. Glass, while a durable material, is less expensive and is not typically used in applications requiring the same level of explosion resistance.