Preliminary Requirements

Safety Requirements

WARNING

REFER TO THE MANUFACTURERS MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION SUCH AS: HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING. USE AND CONTROL MEASURES.

Procedure

1. SUBTASK 70-11-55-110-001 Carbon Removal Procedure

   1. 

      CAUTION

      DO NOT USE THIS PROCESS ON ALUMINUM, CARBON SEALS OR ENGINE BEARINGS.

      

      CAUTION

      DO NOT IMMERSE INSULATED TUBES.

      

      CAUTION

      DO NOT USE THIS PROCEDURE ON TUBES WITH ALUMINUM FITTINGS.

      

      CAUTION

      DO NOT USE A METAL BRUSH TO CLEAN TUBE BORES. WIRE BRUSHING CAN CAUSE SCRATCHES THAT ROUGHEN THIS SURFACE AND INCREASE THE POSSIBILITY OF COKE FORMATION. SCRATCHES CAN ALSO CAUSE CRACKS TO FORM, WHICH CAN CAUSE TUBE FAILURE.

      NOTE

      This process is approved for use on steel, nickel, cobalt and titanium.

      Mask or plug the part, if necessary.

   2. NOTE

      For carbon removal from tubes/jet bores, pump the gel into the tubes; use a suitable squeeze bottle and/or hose.

      Apply CoMat 01-455 ALKALINE GEL CARBON REMOVER or CoMat 01-456 ALKALINE GEL CARBON REMOVER (as received, 100 percent by volume, at ambient temperature) to the part.

   3. Soak the part by one of the methods that follow:

      1. Soak the part for 10 minutes to 12 hours.

      2. For more effective removal of heavy carbon, soak the part in two-hour increments; then, flush with water and apply the alkaline gel again.

   4. Fully flush with a cold or hot water pressure spray.

   5. Remove the masking or the plug.

   6. Do an inspection (borescope internally for tubes) for the removal of carbon with a borescope if used to clean the inner diameter of a tube or internal cavity. If necessary, do procedure B. and C. again. The maximum soak time is 24 hours.