HDPE is used as firefighting pipeline in storage yard of a hydraulic project in Tanzania.HDPE is a kind of low modulus viscoelastic pipe,so it will have self limiting creep expansion under pressure.Due to the extension of polyethylene molecular chain under high stress,the pressure of filling water in the pipe will slightly decline during the test time,which does not mean that the pipe leaks,but the normal behavior of creep plastic pipe.Compared with the rigid pipe,the test method of HDPE pressure test will be different.Based on Chinese code GB 50268-2008,European code BS EN 805:2000 and American code ASTM F2164-18,the firefighting pressure test of HDPE pipeline is compared and analyzed to provide experience reference for subsequent related projects.