Cement lined pipe is a type of pipe that has a layer of cement mortar applied to its interior surface. This lining is designed to protect the pipe from corrosion and to improve the flow characteristics of the fluid or gas being transported through the pipe. Cement lining is commonly used in various industries, including water distribution, sewage systems, and industrial processes.
Cement Lined Pipe Index
- Cement Lined Pipe Benefits
- Cement Lined Pipe Design Considerations
- Cement Lined Pipe Fittings and Pipe Span Considerations
- Mortar Thicknesses
- Cement Lined Pipe Size
- Cement Lined Pipe Standards
- Corrosion Protection - The cement lining acts as a barrier between the interior of the pipe and the corrosive elements in the fluid or gas it carries. This helps extend the lifespan of the pipe and reduces the need for frequent maintenance or replacement.
- Smooth Interior Surface - The cement lining creates a smooth and uniform interior surface, which helps to improve the flow of fluids and reduce friction within the pipe. This can lead to energy savings and increased efficiency in fluid transport.
- Versatility - Cement lined pipes can be used for a wide range of applications, including potable water distribution, wastewater transport, and the conveyance of various chemicals and slurries.
- Longevity - Properly installed and maintained cement lined pipes can have a long service life, making them a cost effective choice for many infrastructure projects.
- Compatibility - Cement lining is compatible with a variety of materials commonly used in pipe construction, such as steel and ductile iron.
It's important to note that cement lining is just one of several lining materials available for pipes, and the choice of lining material depends on factors such as the specific application, the type of fluid or gas being transported, and environmental conditions. Proper installation and maintenance are crucial to ensure the effectiveness and durability of cement lined pipe.
The thickness of the cement mortar lining in cement lined pipes can vary depending on several factors, including the specific application, the corrosiveness of the fluid being transported, industry standards, and engineering considerations. The selection of cement mortar lining thickness in pipes should be a carefully considered decision that takes into account the specific needs of the project, including corrosion resistance, hydraulic performance, industry standards, and cost considerations. Engineers and designers should work closely with manufacturers and refer to relevant standards and guidelines to make informed decisions regarding lining thickness.
Cement lined pipe, also called Mild Steel Cement Lined, abbreviated as MSCL, is pipe that is internally coated with a mortar like compound that acts as a barrier between the carbon steel pipe and the process. The lining may be applied by hand, as is the case with pipe fittings, or with a machine. It is commonly used in the transmission of potable water and sewage applications. It is also used when the process fluid may corrode regular carbon steel pipe.
Due to the fragility of the cement lined coating, it is recommended that the pipe is handled as delicately as possible. This includes the use of rubber covered hooks or other equipment that prevents the damage of the lining.
Mortar Thicknesses often vary per manufacturer. Typical mortar thicknesses are:
|Nominal Pipe Size (in)||AWWA C205 Mortar Thickness (in)||Maximum Span (ft)|
- The Hazen Williams coefficient for new cement lined pipe is typically between 135-150.
- Maximum velocity of a fluid of cement lined pipe is 7-9 feet per second.
- Some people believe that the concrete mortar has self healing properities if it become cracked or otherwise superficially damaged. This is not true. Concrete linings do not regenerate and cracks do not repair themselves.
- ASTM Standards
- ASTM C541 / C541M - Standard Specification for Linings for Asbestos-Cement Pipe