AWWA C900 is a specific standard developed by the American Water Works Association (AWWA) that sets the requirements for Polyvinyl Chloride (PVC) pressure pipe used primarily in water distribution systems. It is a critical specification ensuring the quality, performance, and compatibility of PVC pipes for municipal and private water utilities.
This standard outlines the manufacturing, testing, and material properties for PVC pipes ranging from 4 inches to 60 inches in diameter, specifically designed for use in potable water, reclaimed water, and wastewater applications under pressure.
Understanding AWWA C900 Pipe
The AWWA C900 standard provides detailed guidelines for the production of PVC pipes, ensuring they meet rigorous specifications for durability and safety in water infrastructure. Pipes manufactured under this standard are known for their reliability and long service life.
Key Characteristics of AWWA C900 Pipes:
- Material Composition: These pipes are made from high-quality PVC compounds. For instance, PVC pressure pipe conforming to this standard is manufactured from compounds that meet a cell classification of 12454 as defined in the ASTM D1784 standard. This classification indicates specific minimum physical properties such as impact strength, tensile strength, and stiffness.
- Application: Primarily used for water distribution networks, including mains and service lines, handling various pressures. They are also suitable for reclaimed water and gravity sewer force mains.
- Pressure Ratings: AWWA C900 pipes come in different pressure classes (e.g., DR14, DR18, DR25) which dictate their maximum allowable operating pressure.
- Joint Types: Common joint types include bell-and-spigot with rubber gaskets, ensuring watertight connections.
Why is AWWA C900 Important?
The AWWA C900 standard is vital for several reasons in the water industry:
- Ensures Quality: It guarantees that pipes meet stringent quality controls during manufacturing, leading to reliable and long-lasting infrastructure.
- Promotes Interchangeability: By standardizing dimensions and performance characteristics, it ensures that pipes and fittings from different manufacturers can be used together seamlessly.
- Public Safety: For potable water applications, the standard ensures that the pipe material is safe and does not leach harmful substances into the drinking water supply.
- Environmental Benefits: PVC pipes are resistant to corrosion and tuberculation, which can improve water flow efficiency and reduce energy consumption for pumping.
Technical Aspects of C900
| Feature | Description |
|---|---|
| Material | Polyvinyl Chloride (PVC) compounds, typically conforming to ASTM D1784 cell classification 12454. |
| Application | Pressurized water distribution (potable, reclaimed water), force mains. |
| Diameter Range | Commonly available from 4 inches up to 60 inches. |
| Pressure Classes | Defined by Dimension Ratio (DR), such as DR14, DR18, DR25, indicating the pipe's pressure capability. A lower DR number signifies higher pressure rating. |
| Jointing | Gasketed bell-and-spigot joints are common, providing flexible, leak-tight connections. |
| Certifications | Pipes meeting this standard often carry third-party certifications (e.g., NSF/ANSI 61) for safe drinking water components. |
Applications of AWWA C900 PVC Pipe
AWWA C900 pipe is widely adopted across various sectors due to its robust properties and compliance with crucial standards. Some common applications include:
- Municipal Water Mains: Serving as the backbone of urban and rural water supply networks.
- Subdivision Water Lines: Connecting new residential and commercial developments to existing water infrastructure.
- Reclaimed Water Systems: Transporting treated wastewater for non-potable uses like irrigation.
- Industrial Water Supply: Providing water for various industrial processes.
- Gravity Sewer Force Mains: Used in systems where wastewater needs to be pumped under pressure.
For further information on general AWWA Standards and water infrastructure, it is recommended to consult official publications and industry resources.
