د.رمضان الهادى المدنى2026-06-252026-06-25https://dspace.academy.edu.ly/handle/123456789/2361It is one of the most important responsibilities of a Water Undertaking to properly maintain the transmission and distribution mains in order to prevent waste and provide a constant pressurized flow of potable water to the consumers. It is equally important to prevent damage to the public property which could arise for not properly repairing a defective pipe. Proper planning and implementation of remedial measures will avoid leakages and breakdowns. GRP pipes has a variety of applications and are very common in the chemical and drink industries . Many GRP pipes was produced annually and the vast majority perform satisfactorily. However, a number have failed in service, with a proportion of these failures being catastrophic. Even in situations where the substances contained are not themselves hazardous, the consequences of a catastrophic failure may be serious. To reduce the risk of such failures, you should be aware of what can go wrong and – more importantly – how to avoid it.Glass Reinforced Plastics, commonly known by various standards, as Fiber Reinforced Plastics (FRP), GRP, Glass Fiber Reinforced Plastic (GFRP), Reinforced Plastic Mortar Pipe (RPMP) or Reinforced Thermoset Resin Plastic (RTRP) is an amalgamation of resin, glass fiber, manufactured using appropriate additives and treatment methods. It is a composite engineering material uniquely capable of meeting a wide variety of specific processes and end product requirements of various applications of fluid transport requirements. It has a combinations of properties generally not found in any other traditional or conventional material, these include exceptionally high strength to weight ratio (have low thicknesses and high mechanical properties-with stands high pressures), superior corrosion resistance (no scaling and no buildup), maintenance free, higher hydraulic efficiency (smaller sizes), light weight (lower transportation and installation costs), higher resistance to surge pressure (more safer under worst conditions due to its low modulus of elasticity), best joining systems, excellent workability and design flexibility's. Thus allowing GRP piping to be used for high pressures and in very tough and rough conditions. GRP piping system is often utilized in almost all applications to with stand aggressive service, ambient and environmental conditions. It has been successfully used in various piping systems and applications over all the world. GRP piping industrial in Libya just started yet (i.e. since 2009), so such manufacturing plants facing some sort of difficulties during commissioning and production.pipes defects caused through manufacturing