Page 218 - Trenchless Technology Piping Installation and Inspection

182 Cha pte r F o u r

Advantages Limitations
1. Various standards and 1. Prone to internal tuberculation
methods are available and external corrosion, subject to
for internal and external electrolysis
corrosion protection 2. Use of internal and external corrosion
2. High tensile strength protection raises price of the product
3. High compressive strength 3. Low resistance to external pressures
4. Easy to assemble, nonweld in large-diameter sizes
joints available 4. Air vacuum valves are necessary in
5. Adopts well to locations large-diameter lines
where soil movements occur 5. Welding of joints require skilled labor
6. Good hydraulic properties and is time consuming
when internally lined 6. Special care required to ensure proper
alignment at joint in welded pipe
7. Fully dependent on proper installation
to limit deflection and collapse.
TABLE 4.20 Advantages and Limitations of Steel Pipe

4.8 Summary
This chapter presented an overview of pipe-soil interaction system
describing behavior of rigid and flexible pipes under different load-
ing and environmental conditions. To provide an aid in pipe selec-
tion, this chapter provided detail description of different types of
pipes such as cement based, plastic (PVC, PE, GRP), and metallic
pipes. Manufacturing process, applicable standards, joint types,
and the advantages and limitations of each type of pipe were also
provided.