SAFETY DEVICE TEST PROCEDURES

SAFETY DEVICE TEST PROCEDURES, TEST TOLERANCES, AND LEAKAGE RATES

1. SSV’s     Closure of the SSV shall not exceed 45 seconds. The surface controlled SSSV shall close in not more than 2 minutes after the shut-in signal has closed the SSV. All SSV’s and USV’s shall be tested for operation and leakage at least once each calendar month, but at no time shall more than 6 weeks elapse between test. Leakage rate: None permitted

2. PSV     The relief valve shall be set no higher than the maximum-allowable working pressure of the vessel. All PSV’s shall be tested at least once every 12 months.

Test Tolerances: plus or minus 2 psi up to and including 70 psi, and 3 % for pressure above 70 psi.

3. Vessels     The high pressure shut-in sensor shall be set no higher than 15% or 5 psi, whichever is greater, above the highest operating pressure of the vessel. This setting shall also be set sufficiently below (5% or 5 psi, whichever is greater) the relief valves set pressure. The low pressure shut-in sensor shall activate no lower than 15% or 5 psi, whichever is greater, below the lowest pressure in the operating range.  PSHL set pressure tolerance for set pressures greater than 5 psi is plus or minus 5 percent or 5 psi, whichever is greater, however, the trip pressure should not exceed the pressure rating of the equipment protected. A PSHL with a set pressure of 5 psi or less must function properly within the service range for which it is installed.

4. Flowline     The high pressure shut-in sensor shall be set no higher than 15% or 5 psi, whichever is greater , above the highest operating pressure of the line. The low pressure shut-in sensor shall be set no lower than 15% or 5 psi, whichever is greater, below the lowest operating pressure of the line. All flowline FSV’s shall be checked for leakage at least once each calendar month, but at no time shall more than 6 weeks elapse between test.  PSHL set pressure tolerance for set pressures greater than 5 psi is plus or minus 5 percent 5 psi, whichever is greater, the trip pressure should not exceed the pressure rating of the equipment protected. A PSHL with a set pressure of 5 psi or less must function properly within the service for which it is installed.

5. FSV’s   Shall be checked for leakage at least once calendar month, but at no time shall more than 6 weeks elapse between test.  Leakage Rate: 200 cu. centimeters per/min. liquid or 5 cu. ft. gas per/min.

6. SCSSSV     Shall be tested in place for proper operation when installed or reinstalled and therafter at intervals not exceeding 6 months.  Leakage Rate: 200 cu. centimeters per/min. liquid or 5 cu. ft. gas per/min.

7. SSCSSV     Shall be tested at intervals not exceeding 6 months for those not installed in a landing nipple and 12 months for those valves installed in a landing nipple.  Leakage Rate: 200 cu. centimeters per/min. liquid or 5 cu. ft. gas per/min.

8. Tubing Plugs Inspected for leakage every 6 months. Leakage Rate: 200 cu. centimeters per/min. liquid or 5 cu. ft. gas per/min.

9. The following devices shall be tested at least once each calendar month, but at no time shall more than 6 weeks elapse between test.

All pumps for firewater systems shall be inspected and operated weekly.

10. TSH      Shutdowns on compressor’s every 6 months.       TSH     Shutdowns on fired components every 12 months.

11. ESD    Shall be tested for operation at least once each calendar month, but at no time shall more than 6 weeks elapse between test.

12. ASH Gas Detectors     set point tolerance is plus or minus 5 % of full scale reading; however the trip point must not exceed 60 % LEL at the high level setting or 25 % LEL at the low level setting.