163 ① Limit Hydraulic Fracturing Test Purpose: Check the short-term strength of pipe and fittings Temperature (｢ｪC) 20 40 60 80 Burst Pressure (MPa) 8.4 6.8 5.6 4.2 Result: No abnormalities such as leakage from the fused part are seen. (Reference) Relationship between temperature and burst pressure Notes: PP pipe has no relationship with the size and has almost the same strength. ② Pulling Test Purpose: Check the strength of the pipe-to-fitting fused part against a pulling load (Pulling speed: 10mm/min) Results: No slippage or damage of the fused part. ③ Bending Test Purpose: Check the strength of the pipe-to-fitting fused part against a bending load (Bending angle (Angle of attack): 15｢ｪ) Results: No slippage or damage of the fused part. ④ Flattening Test Purpose: Check the air-tightness when the pipe is flattened near the fused part (Flatten rate: 30%, Water pressure: 2.5 MPa) Results: No delamination or leakage from the fused part. ⑤ Pulsation Test Purpose: Check The strength against repeated pressure (0→←3.0 MPa) on the fitting (Water temperature: 10｢ｪC, Number of times: 1,000,000 times) Result: No abnormalities such as breakage of the fitting and leakage from the fused part are seen. Notes: Data above are experimental values and do not guarantee the performance. Results of Performance Test
