purity

standard

unit

Application

oxygen

≥99.5

GB-T3863-1995

bottle/cylinder

 Steel cutting, welding, flame processing

nitrogen

≥99.5

GB-T3864-1996

bottle/cylinder

Replacement gas and protection gas for chemical industry,    metallurgy, and electric industry.

hydrogen

≥99.9

GB-T3634-1995

bottle/cylinder

Chemical industry, glasses, synthetic cut stone.

CO2

≥99.8

GB-6052-85

bottle/cylinder

Chemical industry, welding, casting mold

Helium

≥99

GB/4844-95

bottle/cylinder

Electronic industry, leak hunting, floating air balloon.

Acetylene(C2H2)

≥98

GB6819-1996

bottle/cylinder

Welding, cutting, heating, organic raw materials

propene

≥99.5

Q/DY-98

KG

Welding, cutting

pure hydrogen

≥99.99

GB/T7445-1995

bottle/cylinder

 Raw material gas, high-altitude weather    balloon used in chemical industry.

pure Helium

≥99.995

GB/T4844.2-1995

bottle/cylinder

 Electronic industry, chemical industry, analysis

  Pure argon

   ≥99.99

   GB/T4842-95

Bottle

    Welding shielded welding, stainless steel smelting, container,    steel structure manufacture, mold processing, etc.