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Aluminium alloy SCUBA cylinders are manufactured according to both ISO 7866 design standard and 2014/68/EU (PED) directive and DOT-3AL.
Ruiying aluminium alloy SCUBA cylinders are highly preferred because they offer great comfort outside the water by being light-weight, while on the other hand they provide high performance in the water with right buoyancy. In addition to their lightweight and buoyancy performance, the aluminium cylinders are also safe and healthy by being tested at 310 bar pressure minimum and being corrosion-resistant.

DOT-3AL standard
DOT-3AL standard
DOT-3AL Seamless Aluminum Alloy Gas Cylinder
No.	Type	Outside diameter(mm)	Working pressure (Bar)	Test pressure (Bar)	Material	Bottom Type	Design wall thickness(mm)	Water Capacity(L)	Height (mm)	Weight (kg)	Certificate
No.	Type	Outside diameter(mm)	Working pressure (Bar)	Test pressure (Bar)	Material	Bottom Type	Design wall thickness(mm)	Water Capacity(L)	Height (mm)	Weight (kg)	Certificate
1	111-1.4-310.5	111 4.37in	207 3000PSI	310.5 5000PSI	AA6061	H	7.62 0.3in	1.4	270	2.4	DOT
2	111-1.7-310.5							1.7	315	2.7
3	111-2.0-310.5							2.0	355	3.0
4	111-2.2-310.5							2.2	385	3.2
5	111-2.5-310.5							2.5	425	3.5
6	111-2.8-310.5							2.8	470	3.8
7	111-3.0-310.5							3.0	500	4.0
8	111-3.2-310.5							3.2	525	4.2
9	111-3.5-310.5							3.5	570	4.5
10	111-4.0-310.5							4.0	640	5.0
11	152-5.0-310.5	152 5.98in	207 3000PSI	310.5 5000PSI	AA6061	H	10.44 0.411in	5.0	475	7.3	DOT
12	152-5.5-310.5							5.5	515	7.8
13	152-6.0-310.5							6.0	550	8.3
14	152-6.5-310.5							6.5	590	8.8
15	152-7.0-310.5							7.0	625	9.2
16	152-7.5-310.5							7.5	665	9.7
17	152-7.8-310.5							7.8	685	10.0
18	152-8.0-310.5							8.0	700	10.2
19	152-8.5-310.5							8.5	740	10.7
20	152-9.0-310.5							9.0	775	11.1
21	185-8.0-310.5	185 7.283in	207 3000PSI	310.5 5000PSI	AA6061	H	12.7 0.5in	8.0	505	11.3	DOT
22	185-9.0-310.5							9.0	555	12.3
23	185-10.0-310.5							10.0	605	13.3
24	185-11.0-310.5							11.0	655	14.2
25	185-11.1-310.5							11.1	660	14.3
26	185-12.0-310.5							12.0	705	15.2
27	185-12.5-310.5							12.5	730	15.7
28	185-13.0-310.5							13.0	755	16.1
29	185-13.5-310.5							13.5	780	16.6
30	185-14.0-310.5							14.0	805	17.0
31	203-8.5-310.5	203 8.0in	207 3000PSI	310.5 5000PSI	AA6061	H	13.95 0.549in	8.5	470	12.6	DOT
32	203-9.0-310.5							9.0	490	13.1
33	203-10.0-310.5							10.0	530	14.1
34	203-11.0-310.5							11.0	570	15.0
35	203-11.1-310.5							11.1	575	15.1
36	203-12.0-310.5							12.0	615	16.0
37	203-12.5-310.5							12.5	640	16.6
38	203-13.0-310.5							13.0	660	17.0
39	203-13.5-310.5							13.5	680	17.5
40	203-14.0-310.5							14.0	705	18.0

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