PVC pressure pipe fittings are pipe fittings made of polyvinyl chloride (PVC) material, mainly used in pipeline systems that withstand a certain pressure. PVC pressure pipe fittings include various parts for connecting pipes, such as elbows, tees, crosses, flanges, etc., which are used to connect and turn different pipe sections in the pipeline system.
Material structure
PVC (Polyvinyl Chloride) is a widely used thermoplastic. PVC pressure pipe fittings are made of vinyl chloride monomer through polymerization reaction, and additives such as stabilizers, lubricants, fillers, etc. are added to improve its heat resistance, toughness, and ductility. The surface of PVC material usually has a layer of paint, the middle is polyvinyl chloride, and the bottom layer is back-coated adhesive. This structure makes PVC pipe fittings have better physical and chemical properties.
Difference between Pressure pipe fittings and ordinary pipe fittings
The main difference between pressure pipe fittings and ordinary pipe fittings is that they are used in different environments and design requirements. Pressure pipe fittings are used in pipeline systems that are subject to internal or external pressure, while ordinary pipe fittings are used in pipeline systems that do not need to withstand pressure.
The difference between pressure pipe fittings and ordinary pipe fittings can be explained in detail from the following aspects:
1. Definition and use:
Pressure pipe fittings: used in pipeline systems that are subject to a certain pressure, such as the transportation of gas, liquid, or steam. The pressure of the fluid and the safety of the pipeline need to be considered during design.
Ordinary pipe fittings: used in pipeline systems that do not need to withstand internal pressure. Gravity flow is usually used for fluid transportation, and internal pressure is not considered during design.
2. Material requirements:
Pressure pipe fittings: materials with sufficient strength, pressure resistance and corrosion resistance are required, such as steel (carbon steel, stainless steel), copper, aluminum alloy, and high-performance plastics (PE, PVC, PP, etc.).
Ordinary pipe fittings: since they do not need to withstand high pressure, lighter and corrosion-resistant materials can be used, such as plastics (PVC, PE), concrete, ceramics, etc..
3. Design and installation requirements:
Pressure fittings: The design needs to be based on the maximum working pressure of the conveying medium to ensure safety and stability under pressure. Welding, flange connection, hot melt connection, or electric fusion connection are required during installation to ensure high sealing and pressure-bearing capacity.
4. Ordinary fittings:
The design mainly considers the fluidity, gravity and slope design of the fluid. Plug-in, bonding, or threaded connection can be used during installation, focusing on easy installation and economy.
5. Applicable scenarios:
Pressure fittings: Suitable for fluid transportation that requires pressure, such as natural gas, water, oil, chemicals, etc., commonly used in industrial production, water supply, gas supply, heating, and other scenarios. Ordinary fittings: Mainly used for fluid transportation that does not need to withstand internal pressure, such as rainwater, sewage, wastewater, etc., commonly used in municipal engineering and infrastructure projects such as drainage systems, sewage treatment, and rainwater collection.
