GAS & METAL REACTION 

  Gas

Aluminum

copper

brass

steel

Stainless steel

Special Characteristic

Acetylene

RNRRRDo not use at pressures exceeding 15 psig

Air

RRRRR

Ammonia

RNNXRCauses stress cracking of cooper and cooper alloys

Argon

RRRRR

Butane

RRRRR

Butanes

RRRRR

Carbon Dioxide

RRRRR

Carbon Monoxide

RRRRR

Ethane

RRR

Ethylene

RRRRR

Ethylene oxide

NNRRExposure of liquid on skin or clothing can cause dermatitis

Fluorine

RRXRStrong oxidant can ignite combustible materials and metals

Helium

RRRRR

Hydrogen

RRRRR

Hydrogen Bromide

NXNXXSteel or stainless steel serviceable in dry liquid or gas service

Hydrogen Chloride

NXXXSteel or stainless steel serviceable in dry liquid or gas service

Hydrogen Fluoride

XRRRRExposure can attack skin, bones and fingernails

Hydrogen Selenide

NNNXRExtremely toxic, older deadens the olfactory nerves

Hydrogen Sulfide

NNNXROdor deadens olfactory nerves, can cause paralysis                

Isobutane

RRRRR

Krypton

RRRRR

Methane

RRRRR

Methyl Acetyiene

RNXRR

Neon

RRRRR

Nitric oxide

RNNXRReadily reacts with oxygen to form Nitrogen Dioxide

Nitrogen

RRRRR

Nitrous oxide

RRRRR

Oxygen

RRRRRStrong oxidant, ignites combustible matter spontaneously

Propane

RRRRR

Propylene

RRRRR

Silane

RRRRRPyrophoric

Sulfur Dioxide

RRRRR

Sulfur Hexafluoride

RRRRR

Xenon

RRRRR

R: RECOMMENDED


N: NON-RECOMMENDED


X: UNSATISFACTORY FOR USE WITH THE INTENDED