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High-pressure cylinders in normal traffic can accumulate I.D. contamination which may detrimentally affect end use. The following procedures are recommended for I.D. cleaning of aluminum cylinders.

• Moisture and grime.
• Steam clean and blow dry.

Clean with a soapy solution - one tablespoon of liquid dish washing detergent to one gallon of tap water. Rinse several times with tap water, rinse twice with demineralized or soft water, steam clean and blow dry. Complete the process without a break. Never leave cylinder freestanding with water.

Rinse thoroughly with a solution of baking soda (one cup baking soda to one gallon of tap water). Rinse with clean tap water. Then, rinse with a solution of vinegar (one half cup of household vinegar to one gallon of clean tap water). Rinse several times with fresh tap water, rinse twice with soft water. Steam clean and blow dry. Complete the process without a break. Never leave cylinder freestanding with water.

Tumble the cylinder at 25 to 35 rpm for 10 minutes with a wet detergent aluminum oxide chip combination (two to three cups of aluminum oxide tumbling chips to two quarts of soft water and one teaspoon of liquid washing detergent). Rinse cylinder well with warm tap water (or soft water if the tap water is hard), steam clean and blow dry.

NOTE: Use demineralized water or make sure water is soft.

OBSERVE MANUFACTURERS' CAUTIONS FOR ALL PRODUCTS USED.

NOTE: Tumbling Media is available from Galiso Nuvac, 22 Ponderosa Ct., Montrose, CO 81402-1468, (800) 854-3789. For more information, call Luxfer's Customer Service department at (951) 684-5110 or, if a scuba cylinder owner, see Luxfer's Guide to Scuba Cylinder Inspection.

Aluminum cylinders in normal service, particularly those having a brushed finish, can pick up grime and scuffing which mar appearance. There are a variety of commercial aluminum cleaners available which can be used to clean and improve this appearance. Please make certain that the product used is specifically marked "suitable for aluminum." Otherwise, serious damage could occur resulting in reduction in wall thickness and inherent strength.

The following methods of cleaning, or combinations thereof, are also acceptable:

• Soap and water
• Solvent wipe
• Non-metallic scrubbing pads

DO NOT USE SOLVENT WIPES OR NON-METALLIC SCRUBBING PADS ON PAINTED/CLEAR-COATED CYLINDERS! USE ONLY SOLVENTS SUITABLE FOR PAINTED SURFACES.

Label removal from the coated surface of a Luxfer cylinder should be done so as to not disturb or ruin the coating of the aluminum cylinder. Luxfer does not recommend the use of chemical label removers. A particularly good physical label removing tool (the Super Scraper) is available from Motsenbocker. Call (858) 581-0222 for your nearest supplier.