# 2008 Budapest
The advanced bimodal PE4710 materials enable its applications in large diameter gas pipe to replace cast iron and steel pipe. Among the three key field performances, the pressure rating is independent of pipe diameters. However, the SCG and RCP properties are dependent of pipe diameters. As pipe diameters increases, RCP critical pressure decreases. Larger diameter pipe with the same percentage of scratches has higher stress intensity that may result in SCG failure sooner. As PSE&G is moving to use large diameter PE4710 gas pipe, the application boundary, material limitations, standard acceptance, and regulatory requirements must be addressed. This paper will investigate all relevant factors that influence the large diameter gas pipe application.