European Markings U.S. Markings NAUTEC DRUCKLUFT - TG 200 890 T 300bar ∂D16 96 / 01 SB 1 the cylinder, an internal inspection should be made at a qualified facility. Sizes Scuba cylinders come in many different sizes. In the metric system, the size of the cylinder is expressed as the volume the cylinder actually holds. In the United States, the size of the cylinder is expressed as the volume of compressed air the cylinder will hold. Some metric sizes you may see when diving include: • A 12-liter cylinder made out of aluminum rated for a pressure of 200 bar. • A 10-liter cylinder made out of aluminum rated for a pressure of 200 bar. • A 10-liter cylinder made out of steel rated for a pressure of 150 bar. • An 18-liter cylinder made out of steel rated for a pressure of 160 bar. Chapter 2- Diving Equipment 2 3 6 Some United States sizes you may see when diving include: • An 80 cubic foot cylinder made out of aluminum rated for a pressure of 3000 psi. • A 63 cubic foot cylinder made out of aluminum rated for a pressure of 3000 psi. • A 72 cubic foot cylinder made out of steel rated for a pressure of 2475 psi. • A 95 cubic foot cylinder made out of steel rated for a pressure of 2640 psi. Markings Markings are placed on the shoulder of each cylinder to provide important pieces of information about the cylinder (figure 2-11). The markings include: • The serial number of the cylinder, which is unique for each cylinder made by a single manufacturer. • The name of the manufacturer or their symbol. • Government-required marks to signify that the Diving Equipment 21 109435 D AS96 / 123456 14, 6 KG 12 , 0L Z FABER M8303 / 97 / 8556/ 134 07 97 TC-3AA M-184 / DOT-3AA 24CCREE73 1 4 2 5 3 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TC - 3AL M207 M8201 DOT -3AL 3000 SH4474 LUXFER 05 98 S80 4 5 7 Steel Cylinder(3AA=Steel) 1. Regulatory Agency 2. Type 3. Working Pressure(Bar) 4. Manufacturer 5. Test Date 6. Serial Number Aluminum Cylinder (3AL=Aluminum) 1. Regulatory Agency 2. Type 3. Working Pressure 4. Serial Number 5. Manufacturer 6. Size 7. Test Date 1. Gas Type 2. Owner 3. Scuba Equipment 4. Service Pressure 5. EWG Design Permit 6. Country of Manufacturer 7. Manufacturer Symbol 8. Serial Number 9. Standard 10. Test Pressure 11. EWG Trademark 12. Repeat Test 13. Empty Weight 14. Minimum Volume 15. Galvanized FIGURE 2-11. CYLINDER MARKINGS PROVIDE IMPORTANT INFORMATION ABOUT THE CYLINDER.
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