Centrifugal winding method of high pressure FRP pipes design method of oil-well pipes

摘要

Previously design of high pressure FRP pipes is based on evaluation of stress for burst of reinforced layer. Its technological standard was presented by API (American Petroleum Institute), and respective evaluation standard is shown by ASTM, AWWA, and ASME. However, besides being applicable only for under 25MPa inner pressure pipes, these does not reflect practical situation that high pressure FRP pipes is destructed mainly not by burst but weeping. This paper shows a design method of extending 25-100 MPa high pressure FRP pipes produced by CW (Centrifugal Winding) method, which is developed by Nishino and his colleagues, by making strain as criteria concerning water leak destruction