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a APR 28 2005 1:02PM HP LASERJET 3200 p.4 SECTION 8 ♦ Repair Procedures PRESSURES FOR THE LOWEST RATED ELEMENT OF THE SYSTEM, OR IF YOU CONTEMPLATE USING AIR OR GAS IN SPITE OF THIS WARNING. REVIEW SAFETY PRECAU- TIONS; PARA.. 1.7.1, BEFORE STARTING THE TEST. If testing with air or gas is required or requested to be per- formed, the following testing procedures and precautions must be followed. As in any system where pressure is employed, adequate safety precautions must be exercised. EXERCISE DUE CARE. JN INSTALLING AND TESTING THE PIPING SYS- TEM. DO NOT ASSUME THE RISK OF INJURY OR PROP- ERTY DAMAGE. 1.. Visually inspect all bonded joints for proper insertion and adhesive cure prior to pressurizing the piping sys- tem. A gap between the adhesive bead and the fitting shoulder indicates that the possibility of joint failure exists. Make any necessary repairs before pressurizing the piping system. See Para, 1.6.9 for potential causes of joint failure. 2. Check the integrity of the joints by pressurizing the j system to 25 psig (0.172 MPa) and holding the pres- sure for a minimum of one minute, then soap all joints to test for leaks. (! 6. Do not straddle the pipe during testing or while checking the piping system for possible leaks. 3. If there are no leaks, raise the line pressure in the sys- ei i;f tem to a maximum of 50 psig (0.345 MPa), Again '> stand at the end of the piping system or where it hold the pressure for at least one minute, and soap all changes directions, CAUTION: Failure to ! joints to check for leaks, i f serious personal injury, death, and/or property 4. As serious personal injury or death can result, damage. the pipe inspector should take precautions for his/her personal safety and protection against flying debris, and also against the whipping action of ` the pipe, which can result from the sudden release of i9F stored energy. Goggles should be worn to protect against flying debris. S. Avoid personal contact with the piping system { S white it is pressurized during testing, except for the actual checking of the joints for leaks. Absolutely no one should be in the trench while the ? pipe Is being initially pressurized for leak testing. Notify all site personnel before beginning the testing procedure. { {N 6. Do not straddle the pipe during testing or while checking the piping system for possible leaks. ei i;f 7. While the pipe is being checked for leaks, do not stand at the end of the piping system or where it changes directions, CAUTION: Failure to strictly follow these instructions can result in i f serious personal injury, death, and/or property ! damage. 8. Smith Fiberglass recommends that after the piping has passed the 50 psig (0.345 MPa) pressure test, the con- tractor should reduce the product lure pressure to a pressure of not more than 25 psig (0.172 MPa) and maintain this pressure until all paving has been com- pleted. leave pressure gauge on each line for inspec- tion. The contractor should check the gauge daily to verify that the pipe is holding pressure. If a leak is encountered during the test procedure, im- mediately release all pressure in the piping system and refer to Section 8 for proper repair procedures. Upon completing any necessary repairs to the piping system, follow the proper testing sequence and verify the sys- tem's integrity. r leaking joints, Smith Fiberglass 'e repair methods listed below. DO to repair damaged fittings. Always pressure Psure work before putting the line back into service to soundness of the repaired section. Contact your local Smith Fiberglass Products' representative for further information. During repair, the pipeline cannot be under pressure, and the area to be repaired must be clean and dry throughout the procedure. 1.8.1 Pipe Patching Follow these Instructions to repair pipe wall damage where the damaged area is two inches (50 mm) or less in' diameter. 1. Cut a length of good pipe long enough to adequately cover the damaged area and extend at least three inch- es (75 mm) (and preferably four inches/100 mm) to ei- ther side of the damaged area (see Fig. 1.8.1). RGURE 1.8.1 2. Slit this "patch" lengthwise twice and remove a section so that about three-fourths of the circumference re- mains (see Fig. 1.8.2). 3. Thoroughly sand the inner surface of the patch and sand a corresponding area on the pipe around the damaged section (see Fig. 1,8.3). Use coarse sandpaper, �8 4 Installation Instructions aY! !n