Full-scale tests of pipe sections with surface axial and circumferential notches to justify the concept "Leak-Before-Break"
![](https://static.wixstatic.com/media/567cc1_c361b1e1824c4332beee03eedf29e61d~mv2.png/v1/crop/x_13,y_0,w_624,h_447/fill/w_473,h_338,al_c,q_85,usm_0.66_1.00_0.01,enc_auto/567cc1_c361b1e1824c4332beee03eedf29e61d~mv2.png)
In order to verify the developed limit load analytical models of the pipe elements with crack-like surface defects of different orientation and determining the mechanism of the possible fracture ("leak" or "break"), full-scale tests of the pipe sections (straight pipe, elbow, T-junction) with axial and circumferential defects were performed.
Test objects:
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straight pipe,
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elbow,
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T-junction.
Full-scale test types:
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straight pipes with axial surface notches under internal pressure,
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straight pipes with circumferential surface notches under internal pressure,
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straight pipes with circumferential surface notches under combined internal pressure and bending,
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pipe bend (elbow) with axial surface notch (on external creator) under internal pressure,
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T-junctions with axial surface notches (in nozzle zone) under internal pressure.
![def1.png](https://static.wixstatic.com/media/567cc1_2b5475e42d2b4663b46e1c8a0495134d~mv2_d_1600_1200_s_2.png/v1/fill/w_115,h_86,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/def1.png)
Leak
![def2.png](https://static.wixstatic.com/media/567cc1_7e65d699190c4ca0b4326f2b7a83f8ec~mv2.png/v1/crop/x_1,y_0,w_1022,h_768/fill/w_114,h_86,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/def2.png)
Break
Full-scale test of T-junction with axial surface notch