PROCEDURE: OPERATING DANIELS JUNIOR ORIFICE CHANGER

RISK RANKING: MEDIUM

HAZARD ASSESSMENT: HAZARD POTENTIAL CONTROL 1. Flammable EFFECT 1. Monitor to be used vapors I LEL 1. Vapors may ignite to detect LEL. Fixed causing flash fire. fire and LEL detection may be in place to initiate ESD. SABA/SCBA may have to be 2. H2S . 2. Exposure above used. OEL may cause 2. Monitor to be used serious personal to detect H2S. injury, at higher Fixed H2S detection concentrations; in place to initiate exposure will cause ESD. breathing to stop. 3. Pressure 3. May cause 3. Assurance to be mechanical made by operator equipment to that all pressure operate indicators read “0” possibly discharge before opening up carrier plate. carrier bar. May SAFETY EQUIPMENT: have to insert Safety glasses with side shields, hard hat, steel toe grease to obtain boots, FR Clothing, gloves, personal monitor, back seal.

up man if required (IDLH for H2S is 100ppm — back up required beyond this concentration), SCBA or SABA, Lockout equipment.

PROCEDURE: 1. Close the inlet isolation valve to the separator.

2. Close the downstream isolation valve from the orifice changer.

3. Close all isolation valves on fluid dump lines as a precaution so that no harmful fluids, gases, or pressure can come back through the dump lines.

4. Have continuous monitor set up and turn unit on. Operator shall continuously monitor for H2S, and O2 deficiency while performing procedure.

Procedure:OPERATING DANIELS JUNIOR ORIFICE CHANGER

- 1 - Date of Preparation: July 14, 2004 Date of Revision: July 14, 2004 5. If possible purge out the separator with sweet gas for 5 minutes to sweep out any H2S gas present in the system.

6. Depressurize or bypass the line if possible.

7. Ensure meter run is depressurized.

8. Loosen the clamping bar set screws. **Stand to side of clamping bar out of the line of fire should any residual pressure still be on the meter, operator will then avoid being injured from ejecting clamping bar.

9. Slide out the clamping bar.

10.Lift out the sealing bar plate carrier ring containing the orifice plate and sealing unit.

11.Remove plate.

12.If at anytime during the procedure the operators monitor shows 100PPM + of H2S concentrations, immediately leave the area and call for back up person. Operator to don SCBA and continue removing plate while back up person watches from safe distance with SCBA on or within arms reach.

PROCEDURE STEPS TO REPLACE THE ORIFICE PLATE:

1. Operator is to continuously monitor for H2S and O2 Deficiency while performing procedure.

2. Verify plate condition, o’ring condition and clamping bar gasket condition prior to reinstalling orifice plate. Ensure bevel edge is on downstream side.

3. Insert the sealing bar plate carrier ring.

4. Slide the clamping bar in and tighten set screws.

5. Close all atmospheric vents.

6. Slowly open the upstream isolation valve to the separator and pressure up the system. Purge system.

7. Once system is pressurized, open up the downstream isolation valve from the orifice plate holder.

8. Meter run is now in service. Return separator valving back into service.

Procedure: OPERATING DANIELS JUNIOR ORIFICE CHANGER - 2 - Date of Preparation: July 14, 2004 Date of Revision: July 14, 2004