What are stipulations on the diving maximum safe depth of China's industry?
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1. Breathe oxygen in diving, decompression, breathing oxygen cabin resting state of maximum safe depth of 15 m.
2. Air diving
A. air diving maximum depth for 60 m;
B. use the portable air diving underwater breathing apparatus for maximum safety depth of 40 m;
C. air saturation diving maximum safe depth of 15 m;
3. The nitrogen oxygen diving:
A. nitrogen oxygen diving depth of 50 m the biggest security;
B. the biggest security of nitrogen oxygen saturation diving depth of 36.5 m;
C. nitrogen oxygen saturation, the air diving tour of maximum safe depth of 70 m;
4. Helium oxygen diving:
A. use jet regenerative helium oxygen heavy diving apparatus diving depth of 120 m the biggest security;
B. the helium oxygen saturation diving and the diving tour of the maximum depth of 300 m.
Diving depth greater than 50 m or decompression time more than 20 min, must be equipped with the water pressure cabin and related equipment. Using injection regenerative helium oxygen heavy diving apparatus, must be equipped with hoisting cage diving and related equipment. Diving depth is more than 150 m, it must be equipped with hot water and respiratory gas heating equipment.