Page 163 - Praxair - Specialty Gases and Equipment Reference Guide

Environmental

EPA Protocols

Component Balance Concentration Certification CGA 4000 Series Regulator
Period (Years) (See Page E•241)
Ammonia Nitrogen 5 - 50 ppm 1 705 Corrosive
Carbon Dioxide Air 360 - 420 ppm 8 590 Non-corrosive
Carbon Dioxide Nitrogen 5 ppm - 20% 8 580 Non-corrosive
Carbon Monoxide Air 2.5 ppm - 10% 8 590/350 Non-corrosive
Carbon Monoxide Nitrogen 2.5 ppm - 15% 8 590/350 Non-corrosive
Formaldehyde Nitrogen 0.5 - 10 ppm 1 330 Corrosive
Hydrogen Chloride Nitrogen 10 - 5000 ppm 2 330 Corrosive
Hydrogen Sulfide Nitrogen 1 - 1000 ppm 3 330 Corrosive
Methane Air 1 - 1000 ppm 8 590/350 Non-corrosive
Methane Nitrogen 1 ppm - 10% 8 590/350 Non-corrosive
Methanol or Ethanol Air/Nitrogen 75 - 500 pmm 4 350 Non-corrosive
Natural Gas Natural Gas Varies 4 350 Non-corrosive
Nitric Oxide Nitrogen 0.5 - 50 ppm 3 660 Corrosive
Nitric Oxide Nitrogen 50 ppm - 1 % 8 660 Corrosive
Nitrous Oxide Air 1 ppm - 5 % 8 590 Non-corrosive
Oxides of Nitrogen Air 3 ppm - 1 % 3 660 Corrosive
Oxides of Nitrogen Nitrogen 10 - 1000 ppm 2 660 Non-corrosive
Oxygen Nitrogen 10 ppm - 25% 8 590 Non-corrosive
Propane Air 0.1 - 500 ppm 8 590 Non-corrosive
Propane Nitrogen 1 ppm - 2 % 8 350 Non-corrosive
Sulfur Dioxide Air 10 - 100 ppm 2 660 Corrosive
Sulfur Dioxide Air 100 - 1000 ppm 3 660 Corrosive
Sulfur Dioxide Nitrogen 1 - 50 ppm 4 660 Corrosive
Sulfur Dioxide Nitrogen 50 ppm - 1 % 8 660 Corrosive

Important Things to Know

■ Multi-component Protocols are assigned a certification ■ Trace concentrations of other pollutants in the mixture
period based on the minor component or balance can be certified on request.
gas with the shortest certification period. ■ For CEM zero grade gas products for Air (see pages
Environmental
B•24 and D•163) and Nitrogen (see pages B•65 and
■ Protocol concentrations lower than those listed D •163).
will have an initial 6-month certification period.
Upon recertification, acceptable cylinders may ■ Other mixture components or concentrations may be
have extended certifications. available, please inquire.
■ Some mixtures may not be available due to critical ■ Certification periods apply only to mixtures in aluminum
mixture limitations, safety considerations or SRM containers.
availability. ■ EPA Protocol mixtures should not be used
■ Analytical uncertainty for certain mixture components below 100 psig.
and concentrations may vary. The actual analytical ■ Manage your environmental gas and equipment needs
uncertainty will be specified on the Certificate of online via Praxair Express .
™
Analysis.

D•162 1-877-PRAXAIR www.praxairdirect.com