TASK 70-00-06-800-007
1 . General.
This chapter defines the quality of gases utilized for standard practices and other process document applications. The three required qualities of gas are the following:
A.Commercial quality gases.
B.Pure gases.
C.Very pure gases.
2 . Commercial Quality Gases.
Subtask 70-00-06-800-071
D.Under the term "Commercial quality gases" are grouped the gases that meet the following specifications:
(1)Gas content, between 99.0 percent and 99.8 percent.
(2)Oxygen content, less than or equal to 20 ppm.
(3)Water content, less than or equal to 20 ppm.
E.These gases are designated only by their name, e.g. Argon.
3 . Pure Gases.
Subtask 70-00-06-800-072
F.Under the term "Pure gases" are grouped the gases that meet the following specifications:
(1)Gas content, between 99.990 percent and 99.998 percent.
(2)Oxygen content, less than or equal to 10 ppm.
(3)Water content, less than or equal to 10 ppm.
G.These gases are designated by their name preceded by the term "pure" e.g. Pure Argon.
4 . Very Pure Gases.
Subtask 70-00-06-800-073
H.Under the term "very pure gases" are grouped the gases that meet the following specifications:
(1)Gas content, between 99.995 percent and 99.998 percent.
(2)Oxygen content, less than or equal to 5 ppm.
(3)Water content, less than or equal to 5 ppm.
I.These gases are designated by their name preceded by the term "very pure", e.g. Very Pure Argon.