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Color differentiation and selection of oxygen tube acetylene tube propane tube carbon dioxide tube, from GB/T 2550-2016

Hose color and gas identification

Gas

Color and logo of the overlay

Acetylene and other combustible gases (except LPG, MPS, natural gas, methane)

gules

oxygen

Blue

Air, nitrogen, argon, carbon dioxide

black

Liquefied petroleum gas (LPG) and methyl acetylene prodiene mixture (MPS), natural gas, methane

orange

All gas in addition to flux of flux (included in this table)

Red / orange

Flux gas

Red flux

With regard to the applicability of hose to hydrogen, the manufacturer should consult the manufacturer