Testing results for Hose Patch, hydraulic hose repair system Test Date: 17/3/2017 Test By, Daniel Adams (Branch Manager CEJN Australia) Report compiled By Daniel Adams Page 1
Test Particulars The hose patch hose repair kit consists of two main parts, an outer sealing clamp which fits over the outside of the hose and an inner hose joining/support joiner. Both parts come in various sizes to allow fitting to various hose sizes and types. Having this combination of parts allows the system to be used in two ways: 1. With the sealing clamp straight onto the hose 2. With the sealing clamp onto the outside of the hose with the inner joiner fitted for extra internal support. The purpose of this testing is to measure the performance of the system in the two usable formats. Equipment used: Test Rig: Maximator Hydraulic test unit using water as test media. NATA gauge certification numbers: APTS-11148-02 (gauge) APTS-11148-03 (transducer and chart recorder) Method: 1. Hose test pieces were damaged mechanically in order to replicate typical in field damage. 2. Only the patch section of the kit is applied to the pre damaged test piece as per the instructions 3. The test piece is tested, observed and recorded. 4. The test piece is then cut and the system is set up using the joiner 5. The test piece is tested, observed and recorded. Results: Each page contains information about the normal working pressure and burst pressure of the hose as well as the pressures the test piece was exposed to during the test. There is one hose type/size to a page. There are two chart recording for each hose type, one for the Patch test and one for the Patch with Barb test. Chart recordings are labelled as to what hose type it was and which type of test it is. Page 2
Hose Type 1 R12 Working Pressure 280 bar Internal diameter 1 Burst Pressure 1120 bar Patch only test 37 bar 68 bar Patch and Barb 293 bar 450 bar Comments: Patch test held pressure @ 37bar but leaked with at a quickening drip from between the clamps when more pressure was applied until no more pressure could built up at 68bar. Patch and Barb test- held pressure at 293 bar (above WP for the hose) for 2 minutes before the pressure was increased to 420 bar (1.5 x WP = Test Pressure) with no loss of pressure after settling. Page 3
Hose Type ¾ R15 Working Pressure 413 bar Internal diameter ¾ Burst Pressure 1655 bar Patch only test 116 bar 139 bar Patch and Barb 445 bar 723 bar Comments: Patch test held pressure @ 75 bar but leaked with a drip from between the clamps pressure was applied until no more pressure could built up at 116bar. Patch and Barb test- held pressure at 445 bar (above WP for the hose) for aprox. 1 min before the pressure was increased to 715 bar momentarily with no loss of pressure before being taken to a maximum of 723 bar where leakage occurred. Page 4
Hose Type ¾ R12 Working Pressure 280 bar Internal diameter ¾ Burst Pressure 1120 bar Patch only test 116 bar 139 bar Patch and Barb 284 bar 474 bar Comments: Patch test held pressure @ 116 bar but leaked with a drip from between the clamps pressure was applied until no more pressure could built up at 116bar. Patch and Barb test- held pressure at 284 bar (above WP for the hose) for 1 minutes before the pressure was increased to 420 bar momentarily with no loss of pressure before being taken to a maximum of 474 bar. Page 5
Hose Type ½ R12 Working Pressure 280 bar Internal diameter ½ Burst Pressure 1120 bar Patch only test 73 bar 96 bar Patch and Barb 277 bar 743 bar Comments: Patch test held pressure @ 68 bar but leaked with a drip from between the clamps pressure was applied until no more pressure could built up at 96bar. Patch and Barb test- held pressure at 277 bar for aprox. 1 min before the pressure was increased to 458 bar for another minute with no loss of pressure before being taken to a maximum of 743 bar where leakage occurred. Page 6
Hose Type ½ 4SP Working Pressure 413 bar Internal diameter ½ Burst Pressure 1655 bar Patch only test 163bar 182 bar Patch and Barb 450 bar 743 bar Comments: Patch test held pressure @ 162 bar but leaked with a drip from between the clamps pressure was applied until no more pressure could built up at 182bar. Patch and Barb test- held pressure at 417 bar (above WP for the hose) for aprox. 1 min before the pressure was increased to 720 bar momentarily with no loss of pressure before being taken to a maximum of 743 bar where leakage occurred. Page 7
Hose Type ½ 2SN Working Pressure 275 bar Internal diameter 2SN Burst Pressure 1100 bar Patch only test 101 bar 151 bar Patch and Barb 277 bar 768 bar Comments: Patch test held pressure of approx 100 bar but leaked with a drip from between the clamps, pressure was applied until no more pressure could built up at 151 bar. Patch and Barb test- held pressure at 277 bar (above WP for the hose) for aprox. 1 min before the pressure was increased to 415 bar for about 1 minute with no loss of pressure before being taken to a maximum of 768 bar where leakage occurred Page 8
Hose Type 5/82SN Working Pressure 250 bar Internal diameter 5/8 Burst Pressure 1000 bar Patch only test 97 bar 135 bar Patch and Barb 243 bar 943 bar Comments: Patch test held pressure of aprox 97 bar but leaked with a drip from between the clamps, pressure was applied until no more pressure could built up at 135 bar. Patch and Barb test- held pressure at 243 bar for aprox. 1 min before the pressure was increased to 360 bar for about 1.5 minutes with no loss of pressure before being taken to a maximum of 943 bar where leakage occurred Page 9
Hose Type 3/82SN Working Pressure 330 bar Internal diameter 3/8 Burst Pressure 1320 bar Patch only test 136 bar 198 bar Patch and Barb 399 bar 828 bar Comments: Patch test held pressure of approx 97 bar but leaked with dripping from between the clamps, pressure was applied until no more pressure could built up at 135 bar. Patch and Barb test- held pressure at 399 bar (well above WP for the hose) for aprox. 1 min before the pressure was taken to a maximum of 943 bar where leakage occurred Page 10
Hose Type ¼ 2SN Working Pressure 400 bar Internal diameter ¼ Burst Pressure 1600 bar Patch only test 31 bar 64 bar Patch and Barb 426 bar 1070 bar Comments: Patch test held pressure of aprox 31bar but leaked with dripping from between the clamps, pressure was applied until no more pressure could built up at 64 bar. Patch and Barb testheld pressure at 426 bar (well above WP for the hose) for aprox. 1 min before the pressure was taken to a maximum of 1070 bar where leakage occurred Page 11
Hose Type 3/8 R7 Working Pressure 155 bar Internal diameter 3/8 Burst Pressure 620 bar Patch only test N/A N/A Patch and Barb 201 bar 313 bar Comments: Patch test- No test data could be obtained due to the high leakage rates. Patch and Barb test- held pressure at 201 bar (well above WP for the hose) for aprox. 1 min before the pressure was taken to a maximum of 313 bar where leakage occurred Page 12
Hose Type 1/4 R7 Working Pressure 190 bar Internal diameter 1/4 Burst Pressure 760 bar Patch only test N/A N/A Patch and Barb 194 bar 333 bar Comments: Patch test- No test data could be obtained due to the high leakage rates. Patch and Barb test- held pressure at 194 bar (well above WP for the hose) for aprox. 1 min before the pressure was taken to a maximum of 333 bar where leakage occurred Page 13
Summary Generally the Hose Patch system works well but with some limitation when used in the patch only mode. Patch and Joiner Mode- In all cases hoses joined with the full system (patch and joiner) were able to be pressurised a minimum of 1.5 times the working pressure** of the tested hose with no failures or distortions around the patched area. **(note 1.5x Working pressure is the test pressure calculation applied under ISO1402 for new hose assemblies) Patch Mode- In all tests in the patch mode there was some leakage. All leakage observed was dripping as rates relative to pressure applied rather than a jet stream. Also in this mode it was observed that some blistering of the hose cover outside of the patch was present due to the test fluid seeping back between the hose layers. On average a working pressure of around 100 bar could be achieved with minimal leakage in most cases. This mode would be an emergency only type patch. Thermoplastic assemblies could not be tested in this mode due to excessive leakage. All tests were assembled using a torque wrench and torqued in a cross pattern sequence, this seems to be key in applying they pressure evenly to the clamp to ensure the best possible result. Page 14