This article is about Inspection and Testing of Concrete Mortar Lining for Internal Surfaces of Line Piping and Fittings. More you will find about cement lined ductile iron pipe and cement lining pipe Procedure.
what is cement lined ductile iron pipe / Cement Mortar Lining?
Cement lined ductile iron pipe is essentially the same as cement mortar lining. Both terms refer to the process of applying a cement mortar lining to the interior surface of a ductile iron pipe.
A cement mortar liner refers to a protective coating or lining applied to the internal surfaces of steel pipes to provide corrosion resistance and improve the longevity of the pipe. It involves the application of a cement mortar material, which is a mixture of cement, sand, and water, to create a smooth and durable lining on the inside of the pipe.
The cement mortar liner serves as a barrier between the pipe and the transported fluids, preventing corrosion and minimizing the risk of leaks or damage. It is commonly used in various industries, including water supply, sewage systems, and oil and gas pipelines, where the protection of steel pipes against corrosion is crucial.
The cement mortar liner is applied through a specialized process that includes surface preparation, application of the mortar mixture, and curing. The thickness of the liner can vary depending on the specific requirements and conditions of the pipeline. The liner enhances the structural integrity of the pipe and helps to maintain the quality and efficiency of fluid transportation.
How to Perform Inspection cement lined ductile iron pipe?
TEST AND INSPECTION PER: 01-SAMSS-005, and Specifications As Noted Below. Following Is Procedure Related To Inspection And Testing Of Concrete Mortar Lining For Internal Surfaces Of Line Pipe And Fittings.
| Pre-Fabrication/Production Requirements | Specification Details / Notes: |
| Quality Program Procedure | Per 01-SAMSS-005 Sec IV |
| Material receiving & Handling | 01-SAMSS-005, 01-SAMSS-024, & AWWA C205. Random sampling for verification and suitability. |
| Reinforcement Wire, Portland cement and Curing compound. | 01-SAMSS-005 & AWWA C205. |
| In process inspection & test requirement | Specification Details / Notes: |
| Mixing ratio/ slump test | 01-SAMSS-005 & AWWA C205 |
| Mortar Testing : Sand, Water and Cement Mortar | Per 01-SAMSS-005 Table 1. To be performed before and during lining operations. Frequency can increase as determined by the COMPANY. |
| Surface Preparation | 01-SAMSS-005 & SIS-05-59-00: Cleaned in accordance with St2. |
| Thickness | 01-SAMSS-005 & AWWA C205. |
| Mortar Lining Test Cylinders | 01-SAMSS-005 & AWWA C205. |
| Final inspection & test requirements | Specification Details / Notes: |
| General Visual inspection, End cap and Curing process | 01-SAMSS-005 & AWWA C205. |
| Handling, Loading & Stacking | 01-SAMSS-005 01-SAMSS-024, & AWWA C205 |
Notes:
- May only be waived by the responsible Saudi Aramco, ASC, or AOC Inspection
- See form SA-175 form (000003) for instructions on using this
Check Practical Video:
FAQs about Cement Mortar Lining
Cement lined ductile iron pipe refers to a type of pipe where the inner surface of a ductile iron pipe is coated with a layer of cement mortar. This lining provides protection against corrosion and abrasion, ensuring the longevity and durability of the pipe.
The cement lining in ductile iron pipes serves as a barrier between the pipe’s interior surface and the transported fluids. It helps prevent corrosion caused by chemicals or corrosive elements present in the fluid, extending the lifespan of the pipe and maintaining water quality.
Some advantages of cement lined ductile iron pipe include excellent corrosion resistance, smooth inner surface for improved flow characteristics, long service life, and low maintenance requirements. It is a reliable choice for water distribution systems, wastewater applications, and other fluid transport systems.
The cement lining process involves cleaning and preparing the inner surface of the ductile iron pipe, followed by the application of a cement mortar coating. The coating is typically applied using a centrifugal spinning method or a stationary lining technique. The pipe is then cured to allow the cement mortar to harden and form a protective lining.
Yes, cement lined ductile iron pipes are commonly used for potable water distribution systems. The cement mortar lining creates a barrier that prevents any contact between the transported water and the metal surface, ensuring the water remains safe and free from contaminants.
Yes, cement lined ductile iron pipes are known for their excellent resistance to corrosion. The cement mortar lining provides a durable protective layer that can withstand corrosive environments, making them suitable for applications where the pipe may come into contact with aggressive substances or corrosive soils.
The lifespan of the cement lining in ductile iron pipes can vary depending on factors such as water quality, operating conditions, and maintenance practices. Generally, a properly applied and maintained cement lining can last for several decades, providing long-term protection and performance. Regular inspections and maintenance can help ensure the longevity of the lining.