For nearly 50 years, polyethylene (PE) has been used to transport fluids. Its ability to withstand harsh chemicals without corrosion and leak as well as the tight installation, polyethylene (PE) has been regarded as the ideal material for the gas industry. Additionally, PE joints offer leak-free connections which outperform other competing materials in terms of reliability and longevity, not to mention the remarkable savings on the installation costs and life of the materials. Improvements in the strength and performance of PE materials has resulted in water, chemical & several other industry needing solutions for liquid and gas transfer to adopt PE for its pressure transmission networks.

The three basic popular available type of PE are HDPE, MDPE and LDPE.   LDPE grades have a very minimal role in pipe production and HDPE remains the dominant player in pipe manufacture.  The Properties of polyethylene are primarily determined by density, molecular weight distribution.  With increasing density (higher crystallinity), the following properties also increase:  Yield Stress (tensile Strength), Modulus of Elasticity (Rigidity), Hardness, Solvent Resistance, Impermeability to gases and vapors.    On the other hand, impact strength, transparency and stress cracking resistance decrease with increasing density.