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PRESSURES FOR THE LOWEST 4. t As serious personal this pressure until all paving RATED ELEMENT OF THE SYS- injury or death can has been completed. Leave TEM OR IF YOU CONTEMPLATE result, the pipe inspector pressure gauge on each line \ USING AIR OR GAS IN SPITE OF should take precautions for for inspection. The contractor THIS WARNING.REVIEW SAFETY his/her personal safety and should check the gauge daily PRECAUTIONS, PARAGRAPH protection against flying to verify that the pipe is hold- 1.7.1, BEFORE STARTING THE debris and also against the ing pressure. TEST. whipping action of the pipe If a leak is encountered during If testing with air or gas is which can be the result of the the test procedure, imme- required or requested to be per- sudden release of stored diately release all pressure in formed, the following testing energy. Goggles should beworn to protect against flying the piping system and refer to procedures and precautions Section 8 for proper repair must be followed. debris. procedures. Upon completion As in any system where pressure 5. Avoid personal contact of any necessary repairs to the is employed, adequate safety with the piping system piping system, follow the precautions must be exercised. while it is pressurized during proper testing sequence and EXERCISE DUE CARE IN INSTAL- testing, except for the actual verify the system's integrity. LING AND TESTING THE PIPING checking of the joints for SYSTEM. DO NOT ASSUME THE leaks. Absolutely no one RISK OF INJURY OR PROPERTY should be in the trench while DAMAGE. the pipe is being initially pres- surized for leak testing. Notify 1. Visually inspect all bonded all site personnel prior to joints for proper insertion and beginning the testing pro- adhesive cure prior to pressur- cedure. izing the piping system. A gap between the adhesive bead 6. Q Do not straddle the and the fitting shoulder indi- pipe during testing or cates that the possibility of while checking the piping joint failure exists. Make any system for possible leaks. necessary repairs before pres- 7. , While the pipe is being surizing the piping system. checked for leaks, do See Paragraph 1 .6.9 for not stand at the end of the potential causes of joint piping system or where it failure. changes directions.CAUTION: 2. Check the integrity of the Failure to strictly follow these joints by pressurizing the sys- instructions can result in tem to 25 psig(.172 MPa)and serious personal injury, holding the pressure for a death, and/or property minimum of one minute,then damage. soap all joints to test for leaks. 8. Smith Fiberglass Products 3. If there are no leaks, raise the recommends that after the line pressure in the system to a piping has passed the 50 psig maximum of 50 psig (.345 (.345 MPa) pressure test, the MPa).Again hold the pressure contractor should reduce the for at least one minute, and product line pressure to a soap all joints to check for pressure of not more than 25 leaks. psig (.172 MPa) and maintain 20