BB-H-886E
2.2 Other publications. The following documents form a part of this specification to the extent
specified herein. Unless a specific issue is identified, the issue in effect on the date of invitation
for bids or request for proposal shall apply.
Compressed Gas Association (CGA)
CGA C-1
- Methods for Pressure Testing Compressed Gas
Cylinders
CGA C-5
- Wall Stress Requalification Criteria for High
Pressure Seamless Steel Cylinders
CGA C-6
- Standards for Visual Inspection of Steel
Compressed Gas Cylinders
CGA C-11
- Recommended Practices for Inspection of
Compressed Gas Cylinders at Time of Manufacture
CGA G-5
- Hydrogen
CGA G-5.3
- Commodity Specification for Hydrogen
CGA P-15
- Filling of Industrial and Medical Nonflammable
Compressed Gas Cylinders
CGA S-1.1
- Pressure Relief Device Standards Part 1 - Cylinders
for Compressed Gases
CGA TB-17
- Test Methods for Evaluating Paints and Coatings on
Refillable Steel Compressed Gas Cylinders
CGA V-9
- Compressed Gas Association Standard for
Compressed Gas Cylinder Valves
(Application for copies should be addressed to the Compressed Gas Association, 4221
Walney Road, 5th Floor, Chantilly, VA 20151-2923. Electronic copies may be obtained from
https://www.cganet.com/.)
3. REQUIREMENTS
3.1 Material. The material shall conform to the requirements of type I (gaseous) hydrogen as
specified in CGA G-5.3 and shown in table I.
TABLE I. Requirements. 1
Limiting characteristics
Grade A
Grade B
Grade C
ppm (v/v) 2
ppm (v/v)
ppm (v/v)
QVL B 3
CGA G-5.3 Quality Verification Level
QVL D
QVL L
Hydrogen, minimum (percent by volume)
99.95
99.99
99.999
Water vapor
34
3.5
3.5
Total hydrocarbon content (as methane)
10
5
1
1
Additional information on the properties and handling of hydrogen may be found in CGA G-5.
2
Quantities are in parts per million by volume (ppm (v/v)) unless otherwise noted.
3
QVL B for type I (gaseous) hydrogen.
3
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