1997-07-21_GENERAL DOCUMENTS - M1977493

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07/21/1997 08:45 3035724444 CROW COMPANY PAGE 05 toy►Prewure Procedure Procedure: For pipe and components rated for gravity flow, The piping system should be gradually Drought up intermittent low pressure,or low pcesstrm service. to normal operating pressure,and held at the required test presaue should be maintained for operating pressure for at had ten(10)minutes. ten(10)minutes to one(1)hour,but not more During this tune,Joints and connections should be than one(1)hour. examined for visual evidence of leakage. Leairage inspections may be performed during this time. If the test pressure remains steady(within 5%of the target value)for the test time,no NON-TESTABLE SYSTEMS leakage is indicated TEST PRESSURE RATINGS MUST NOT BE Guidelines EXCEEDED. Some systems may not be suitable for pressure testing. These systems may contain INITIAL SERVICE TESTING non-isolatable components,or temporary closures may not be practical. Such systems should be carefully inspected during and after installation. Guidelines Inspections such as visual examination of joint An initial service test may be acceptable when appearance,meduuUcal checks of bolt for joint tightness.and other relevant examinations should other types of tests are not practical,or when leak be performed, tightness can be demonstrated by normal service, or when performing initial service tests of other equipment. An initial service test may apply to systems where isolation or temporary closures are Plexcolspirolite impractical.or where checking out pumps and 1050 Busse Highway,Suite 200 other equipment affords the opportunity to Bensenville,IL 60106 examine the system for leakage prior to full scale (708)350-3700 operations. Rev.1/92 01991 Chevron Chemical Company