Qual é a temperatura máxima segura para tanques de oxigênio e acetileno quando expostos à luz solar direta?

The temperature to avert explosive risks for oxygen and acetylene cylinders in sunlight exposure should be maintained under 40°C.

This guideline is stipulated in TSGR0006-2014, the official Safety Technical Supervision Regulations for Gas Cylinders. For further information, see point 6 under section TSG6.7.1.