Gumbriatno, Steve is right. ...

Gumbriatno,

Steve is right. You need more information.

There is not an only answer for this question. Depending of the country some materials are cheaper than others due to availability (HDPE, MDPE, RTP, etc). Rocky soils sometimes requires ensure pipe life span using carbon steel instead. Country regulations, and industry standards (O&G, nuclear, food processing, etc.) may require additional safety factors that make one material more suitable than other despite the cost.

Just for Oil and Gas these are general guidelines, but  more information is  needed:

Low pressure pipes  under 200 psig MAWP (Maximum Allowable Working Pressure) HDPE or MDPE is used depending of the diameter and location classification (population density).

Reinforced Thermoplastic Resin Pipes (RTP or RTRP) are used pressure at pressures near 2000 psig, depending also by pipe diameter, thickness and location classification.

Carbon Steel is also used if the corrosion levels can be mitigated using corrosion inhibitors and if periodical magnetic internal inspections can be performed.

I have used all of these pipes in my career and in each case a particular analysis was done to decide the best option for the application.