Here are the key aspects of GRP (Glass Reinforced Plastic) and HDPE (High-Density Polyethylene) pipes as main options for pipework:

GRP Pipes:

Advantages: Cost-effective for large diameters, high stiffness, and competitive CAPEX.
Installation: Requires trench installation to prevent floating; suitable for calm sea conditions.
Usage: Predominantly used in the Middle East due to favorable climate conditions.
Considerations: Requires careful handling and installation to avoid damage; not ideal for rough sea conditions.

HDPE Pipes:

Advantages: Versatile, can be installed in trenches or above seabed; suitable for rough sea conditions.
Installation: Allows for long-length pipes, reducing the number of joints and installation time.
Usage: Widely used globally, especially in regions with challenging sea conditions.
Considerations: Requires concrete ballast for stability; welding quality is crucial for integrity.