Fire endurance test on water filled plastic piping

Transcription

1 TEST REPORT No RTE 3359/05 25 October 2005 T018 (EN ISO/IEC 17025) Fire endurance test on water filled plastic piping IMO Resolution A.753(18), 22 November 1993, Guidelines for the Application of plastic Pipes on Ships Appendix 2, Test Method for Fire Endurance Testing of Water filled plastic piping Requested by: E.Skov Jørgensen A/S Date of test: 25 August 2005 VTT TECHNICAL RESEARCH CENTRE OF FINLAND VTT BUILDING AND TRANSPORT

2 TEST REPORT NO RTE 3359/05 1 (4) Requested by Testing Laboratory E.Skov Jørgensen A/S Lillebaeltsvej Esbjerg N Order: Michael Gøtke, Gavatec I/S, 28 June 2005 VTT TECHNICAL RESEARCH CENTRE OF FINLAND (Kivimiehentie 4, Espoo) P.O. Box 1803, FI VTT, FINLAND Contact person at VTT: Kimmo Kaukanen, Tel: , Fax: Task Fire endurance test on insulated water filled plastic piping Test specimen The customer delivered one insulated plastic pipe to VTT on 10 August According to the client the pipe was made of polyethylene. The type markings of the pipe were: Egeplast PE100, SDR11, PN16. The total length of the test specimen was 1500 mm. The whole test specimen consisted of two bare pipe sections which were jointed by butt fusion and of an electro fusion (E/F) coupler. The other end was closed with an end cap and the other with a flange adaptor and a blind flange equipped with interfaces to the testing equipment. The pipe was insulated by Superwool 607 Max Blanket with declared thickness of 25 mm and declared density of 160 kg/m 3. The measured thickness of the wool was 25 mm and density 173 kg/m 3. The pipe was coated with 0.6 mm thick AISI 316 L stainless steel sheet. The threads were made of 0.7 mm thick AISI 316 L stainless steel. The steel sheets were fixed with 6 securing bands: Tespa AISI 316 stainless steel Regular band 19 x 0,76 mm. The securing bands were located outside the steel cover. The distance between supports was 800 mm. The test specimen was exposed to fire at a length of 420 mm, direct above the burners. Part of the pipe, the butt fusion joint and the E/F coupler were on the exposed part of the insulated and steel covered pipe. Drawings Appendix 1 Test arrangement with temperature and pressure measurement locations of the test specimen. Appendix 2 Manufacturer of the plastic pipes Date of test 25 August 2005 E.Skov Jørgensen A/S Lillebaeltsvej Esbjerg N Denmark Date of delivery to VTT: 10 August 2005 Date of mounting and calibration: 24 August 2005 The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

3 TEST REPORT NO RTE 3359/05 2 (4) Test method IMO Resolution A.753(18), 22 November 1993, Guidelines for the Application of plastic Pipes on Ships Appendix 2, Test Method for Fire Endurance Testing of Water filled plastic piping Deviations from the test method Method description Appendix 4 Witnesses Test External pressure [part of the IMO Resolution A.753(18)] According to the acceptance criteria of the IMO Res. A.753(18), Appendix 1, part 5, an internal and external pressure test must be performed after the fire resistance as defined in paragraphs and The external pressure test was not performed due to customers own request. The test was not witnessed by the client or its representatives. The fire endurance test was carried out in the VTT test hall. Before the fireendurance test the systems was calibrated with radiation measurement equipment. Test arrangement with temperature and pressure measurement locations of the test specimen. Appendix 2 The fire endurance test was terminated 30 minutes after the start of the test. After the fire endurance test the internal pressure test was performed. The External pressure test was not carried out. Test results The test results with respect to the requirements imposed by the Resolution of IMO A.753(18) on the fire endurance level L3, water filled plastic piping are presented in the following tables 1 & 2: Table 1. Test results. Fire endurance test 30 minutes Property Water pressure Water temperature Start of the test End of the test Pipe 3 bar 18 C 23 C Integrity leakage Requirement: the allowed leakage <200ml/min No leakage Met requirement for integrity 30 min The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

4 TEST REPORT NO RTE 3359/05 3 (4) Table 2. Test results. Internal pressure test. Duration of test: 15 minutes. Property Water pressure Pipe 16 bar Water temperature 20 C Leakage No leakage Requirement: the allowed leakage <200ml/min Met requirement for leakage 15 min The measured temperatures of the test specimen Appendix 3 Observations Appendix 5 Photographs Appendix 6 The ambient air temperature in the test hall was 21 C in the beginning of the fire resistance test. The test results relate only to the behavior of the test specimen under the particular conditions of the test. At other conditions, for instance under another fire exposure, the behavior of the construction may differ from the presented test result. Classification An insulated plastic pipe PE100, SDR 11, PN16 constructed as described in this test report met during 30 minutes the performance criteria of fire resistance and internal pressure test and may be regarded as a class L3 pipe according to IMO Resolution A.753(18). The pipe may be used in applications where the lack of the external pressure test does not prohibit its use. Prohibited applications would be for instance to mount the pipe to penetrate through tanks (Reference: IMO Resolution A.753(18), Appendix 4 Fire endurance requirement matrix). With respect to the fire safety aspects it shall also be noticed what is said in paragraphs and 4.6 of IMO Resolution A 753(18) concerning flame spread, smoke generation, external pressure, toxicity, electrical conductivity, fire protection coatings and penetrations of fire divisions. Espoo, 25 October 2005 Riitta Kajastila Group Manager Kimmo Kaukanen Research Scientist The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

5 TEST REPORT NO RTE 3359/05 4 (4) APPENDICES Drawings Appendix 1 The test arrangement with temperature and pressure measurement locations of the test specimen Appendix 2 The measured temperatures of test specimen Appendix 3 Method description Appendix 4 Observations Appendix 5 Photographs Appendix 6 DISTRIBUTION Client, 4 originals VTT/Archive, 1 original 6 RTEU107/1073RAKE/KIK The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

6 TEST REPORT NO RTE 3359/05 APPENDIX 1 1 (1) DRAWING AND DATA OF THE TEST SPECIMEN Drawing of the test specimen Drawing of the test specimen ( structure under the steel cover) * = Distance between supports Data of the test specimen delivered by the client: Pipe: Egeplast, PE 100, SDR 11, PN 16 Fittings: Bänninger, PE 100, SDR 11, PN 16; flange adaptor and end cap TEGA, PE 100, SDR 11, PN 16; Electro fusion coupler Isolation: Thread: Steel cover: Superwool 607 Max Blanket, 160 kg/m3, 25 mm thick. AISI 316 stainless steel Ø 0,7 mm AISI 316 L stainless steel sheet 0,6 mm Securing band: Tespa AISI 316 stainless steel Regular band 19 x 0,76 mm (outside the steel cover) The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

7 TEST REPORT NO RTE 3359/05 APPENDIX 2 1 (1) Test arrangement with temperature and pressure measurement locations of the test specimen. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

8 TEST REPORT NO RTE 3359/05 APPENDIX 3 1 (1) THE MEASURED TEMPERATURES The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

9 IMO RES A. 753(18), L3 TEST Short test method description APPENDIX 4 1 (2) TEST METHOD FOR FIRE ENDURANCE TESTING OF WATER FILLED PLASTIC PIPING Test method IMO Resolution A.753(18), 22 November 1993, "Guidelines for the Application of Plastic Pipes on Ships" Appendix 2 "Test Method for Fire Endurance Testing of Waterfilled Plastic Piping". The test is intended to ensure that piping systems meet the fire endurance requirements of the level 3. This lowest level is considered to provide the fire endurance necessary for a water filled piping system to survive a local fire of short duration. The piping systems essential to the safe operation of the ship have to meet level 3 fire endurance standard (Fire endurance requirements matrix is presented in Appendix 4 of IMO A.753(18)). For plastic piping systems three levels (1, 2 and 3) of fire endurance are given, level 1 being the highest and level 3 the lowest one. Specimen Test Each pipe should have a length of approximately 1,5 m. The test pipe shall be prepared with permanent joints and fittings intended to be used. Only valves and straight joints versus elbows and bends are tested as the adhesive in the joint is the primary point of failure. The number of pipe specimens shall be sufficient to test all typical joints and fittings. If the insulation contains, or is liable to absorb, moisture the specimen should not be tested until the insulation has reached an air dry condition. This condition is defined as equilibrium with an ambient atmosphere of 50 % relative humidity at 20+5 o C. The test specimen with a length of 1500 mm mm, is mounted freely in a horizontal position on two V shaped supports. The free length of the pipe between the supports is 800 mm + 50 mm. The ends of the pipe are closed and at one of the ends pressurized water is connected. The water inside the pipe is stagnant and the pressure is maintained at 3 + 0,5 bar during the test. A relief valve is connected to one of the end closures of the specimen and the water inside the pipe is deaerated. The water temperature shall not be less than 15 o C at the start and is measured continuously during the test. The fire source consists of the rows of burners mounted centrally below the test pipe parallel to the pipe's axis. The distance between the burner heads and the pipe is mm. A constant heat flux averaging 113,6 kw/m 2 (+10%) is maintained at the level of the bottom surface of the pipe. The gas consumption is measured during the test. The duration of fire endurance test in the wet condition is 30 minutes. After termination of the burner regulation test, the specimen is allowed to cool down to ambient temperature. Then it is tested with internal pressure and if needed also with external pressure defined according to the classification. The test time in the pressure tests is 15 min. Internal pressure test: The internal pressure in the test is the nominal internal pressure for a pipe which is determined by dividing the short term hydrostatic test failure pressure by a safety factor of 4 or the long term hydrostatic (> h) test failure pressure by a safety factor of 2.5, whichever is the lesser. The hydrostatic test failure pressure should be verified experimentally or by a combination of testing and calculation methods to the satisfaction of the Administration. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication in part of this report is only possible by written authorization from the Technical Research Centre of Finland.

10 IMO RES A. 753(18), L3 TEST Short test method description APPENDIX 4 2 (2) External pressure test: Piping should be designed for an external pressure not less than the sum of the maximum potential head of liquid outside the pipe, plus full vacuum (1 bar). The pressure in the test is same as the nominal external pressure for a pipe which is determined by dividing the collapse test pressure by a safety factor of 3. The collapse test pressure should be verified experimentally or by a combination of testing and calculation methods to the satisfaction of the Administration. Where practicable, the hydrostatic test is conducted on bare pipe, that is pipe which has had all of its coverings including fire protection insulation removed, so that the leakage will be readily apparent. Measurements and observations Temperature, pressure and the gas consumption are measured and recorded at intervals not exceeding 1 minute. Observations are made of the general behaviour of the specimen and photographs and if needed also a video film are taken. Performance criteria During the test, no leakage from the specimen should occur except that slight weeping through the pipe wall may be accepted. Test equipment In the hydrostatic test (after the fire test) the pressure should be held for a minimum of 15 minutes without significant leakages, i.e. not exceeding 0,2 l/minute. Burners: "Sievert No.2942", the inner diameter 29 mm For piping up to 152 mm in external diameter, the fire source consists of two rows of 5 burners and for piping greater than 152 mm in diameter, one additional row of burners is included for each 51 mm increase in pipe diameter (according to Res.A.753 Appendix 2). Constant heat flux 113,6 kw/m 2 (+10%) measured at the mm height above the centreline of the burner array. Fuel: Propane gas, purity 95 %. Radiometer: Medtherm Corporation Model No , Serial No , measuring range kw/m 2. Thermocouples for water temperature: K type (Chromel Alumel) φ 3 mm stainless steel sheathed Water pressure gauges: "Ceval" over pressure gauge, measuring range 0 6 bar and "Wika" under pressure gauge, measuring range 1 0 bar. Gas consumption: Brooks, Mass Flow Controller 5853E, 0 7 g/s propane Weighing device: Metter Type KCC300/43, measuring range kg, accuracy <+3%. RiK/ The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication in part of this report is only possible by written authorization from the Technical Research Centre of Finland.

11 TEST REPORT NO RTE3359/05 APPENDIX 5 1 (1) Observations during the fire endurance test Time/min:s Observation 00:00 Fire endurance test was started. 00:09 The exposed surface began to darken 00:10 Water pressure measurement: 3.16 bar 30:00 The test was terminated. No leakage was observed during the test Observations during the internal pressure test Time/min:s Observation 00:00 Internal pressure test was started. 15:00 The test was terminated. No leakage was observed during the test The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

12 BUILDING AND TRANSPORT TEST REPORT NO RTE 3359/05 APPENDIX 6 1 (5) Photographs of the test specimen Fig 1. Test specimen before the fire endurance test. Fig 2. Fire endurance test. Test time 3 min 34 s. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

13 BUILDING AND TRANSPORT TEST REPORT NO RTE 3359/05 APPENDIX 6 2 (5) Fig 3. Fire endurance test. Test time 7 min 20 s. Fig. 4. Fire endurance test. Test time 24 min 28 s. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

14 BUILDING AND TRANSPORT TEST REPORT NO RTE 3359/05 APPENDIX 6 3 (5) Fig. 5. Fire endurance test. Test time 30 min. Fig. 6. The test specimen after the fire endurance test. The exposed face of the pipe. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

15 BUILDING AND TRANSPORT TEST REPORT NO RTE 3359/05 APPENDIX 6 4 (5) Fig. 7. The test specimen after the fire endurance test. Covering opened. Fig. 8. The test specimen after the fire endurance test. Covering and insulation opened. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.

16 BUILDING AND TRANSPORT TEST REPORT NO RTE 3359/05 APPENDIX 6 5 (5) Fig. 9. The test specimen after the fire endurance test. The steel covering. Fig. 10. The test specimen after the fire endurance test. All insulation removed. Fig. 11. The test specimen after the fire endurance test. Surface of the E/F coupler. The use of the name of the Technical Research Centre of Finland (VTT) in advertising or publication of this report in part is possible only by written permission from VTT.