Specialty Gas Mixtures

Our ISO/IEC Accredited Analytical Gas lab in the Pacific Northwest allows us to produce calibration gases that meet a wide range of measurement and process control requirements. Local distribution means faster turn-around on customer orders. Central Welding Supply can Fill and analyze in house specialty gas mixtures of multiple components as low as 100 ppm. 

Standard Gas Mixtures

  • Environmental Monitoring

  • Appliance Testing

  • Emission Testing

  • Oil & Gas Measurements

  • Gas Detection

  • Food & Pharma

  • Research & Development

Custom Gas Mixtures

  • Customer specifications

  • Developmental mixtures

  • Mixed blend specifications

  • Liquid mixtures

  • Variety of packaging

Accredited Mixtures

  • Gas Mixtures calibrated and accredited to ISO/IEC 17025:2017

  • (COC) Certificate of Conformance

Specialty Gas Mixtures

Central Cryogenics offers a wide variety of custom gas and liquid mixtures to suit the most stringent process control or analytical requirements.

We supply three grades, covering most specification requirements. The Mixture Specifications Table outlines each of the three grades - Primary Standard, Certified Standard, and Unanalyzed Mixture - and their tolerances. If you require accuracies which exceed our stated tolerances, our Gas Specialists can assist you.

Grade Concentration Range Preperation Tolerance Certification Tolerance
Primary Standards** 20 ppm to 4,999 ppm
5,000 ppm to 1.9%
2% to 49% 		±5% of component
±2% of component
±1% of component 		±1% of component
±1% of component
±0.02% absolute
Certified Standards** 1 ppm to 99 ppm
100 ppm to 0.99%
1% to 49% 		±20% of component
±10% of component
±5% of component 		±5% of component
±2% of component
±1% of component
Unanalyzed Mixtures 0.1% to 0.99%
1% to 50% 		±15% of component
±10% of component 		Not Applicable
Not Applicable
*These tolerances may vary from those stated in the table under the following situations:

- Mixtures containing low molecular weight components such as hydrogen and helium, depending on their concentration.
- Mixtures containing components that present adsorption, stability, or other blending problems.
- Multicomponent blends, depending on the type, number, and concentration of the components.

**Depending on the component concentrations, it is sometimes possible to produce gas mixtures with tolerances that surpass those indicated.

Pure Gas Products

Central Cryogenics offers the six major grades of gas purity specifications.

- Research Grade
- Ultra High Purity
- Zero
- High Purity
- Electronic Grade
- Ultra Pure Carrier Grade Gases

Central Welding Supply is the ONLY regional producer of CEMS Air and CEMS Nitrogen

Laser Grade Pure Gas, Gas Mixtures, and Laser Gas Systems.

Laser Applications

Pure gases and the calibration of specialty gas mixtures are a critical component in the operation of a laser cutting applications. Our ISO accredited specialty gas lab is state of the art and the only local source for production and distribution.The working of metals with industrial lasers is now a very widespread practice in industry. Laser manufacturers and users agree that the quality of the gases used in laser applications is of vital importance.Central Cryogenics maintains gases that meet or exceed defined standards for better performance and longer life spans for your laser equipment. The benefits of using quality gases include extended life for consumables and optics, improving laser performance and lowering operating cost.

Resonator Gases

  • Designed to improve laser performance

  • Lower operating costs

  • Blended to meet or exceed the exact specifications and tolerances of the Laser Equipment Manufacturer.

Laser Assist Gases

Central Cryogenics offers high quality, high purity assist gases such as: Nitrogen, Oxygen, Argon, Helium. Central Cryogenics maintains gases that meet or exceed defined standards for better performance and longer life spans for your laser equipment. And, we maintain a consistent quality level of purity for all delivered liquid and can provide individual certifications.

Laser Cutting System Design

Certificate of Accreditation
ISO/IEC 17025:2017
Calibration
Iss. Date: 2/16/2023
Exp Date: 5/31/2025
Accreditation: 112792

Certificate of Accreditation
ISO/IEC 17025:2017
Chemical Testing
Iss. Date: 2/16/2023
Exp Date: 5/31/2025
Accreditation: 112792

Certificates of Conformance (COC)

A COC defines gas specifications for products distributed. This certification provides quality assurance for gases filled within a batch.

COC's are available on request for all the gases we fill and distribute.

Custom gas and liquid mixtures to suit the most stringent process control or analytical requirements.

  • Primary Standard

  • Certified Standard

  • Unanalyzed Mixture

Certificates of Analysis (COA)

A COA defines gas specifications and quality assurance for "UHP" grade gases or mixtures that is performed on a specific cylinder or vessel.

COAs may be requested at the time of gas order for an additional charge.

QUESTIONS ABOUT GAS CERTIFICATIONS?
Contact our Gas Specialists for further information regarding our gas certifications.

CALL: (360) 454-5541
smokeypointlab@centralwelding.com

Industries Served

  • Life Science Industries

  • Research Laboratories

  • University / Medical Research

  • Chemical / Petrochemical

  • Semi-conductor / Electronics

Complete List of Specialty Gases:

Acetylene
Air
Ammonia
Argon
Arsine
Boron Trichloride
Boron Trifluoride
Butadiene 1,3
n-Butane
Butene (cis-2)
Butene (trans-2)
1-Butene
Carbon Dioxide
Carbon Monoxide
Carbonyl Sulfide

CEMS Air
CEMS Nitrogen
Chlorine
Deuterium
Dichlorosilane
Dimethyl Ether
Ethane
Ethylene Hal
ocarbon-14 (Tetrafluoromethane)
Halocarbon-22 (Chlorodifluoromethane)
Halocarbon-23 (Trifluoromethane)
Halocarbon-116 (Hexafluoroethane
Halocarbon-134A (Tetrafluoroethane)
Halocarbon-218 (Octafluoropropane)
Halocarbon-C318 (Octafluorocyclobutane)

Helium
Hydrogen
Hydrogen Bromide
Hydrogen Chloride
Hydrogen Sulfide
Isobutane
Isobutylene Krypton
Methane
Methyl Chloride
Methyl Fluoride
Methyl Mercaptan
Monomethylamine
Neon
Neopentane
Nitric Oxide

Nitrogen
Nitrogen Dioxide
Nitrogen Trifluoride
Nitrous Oxide
Oxygen
Pentane
Phosphine
Propane
Propylene
Silane
Silicon Tetrachloride
Sulfur Dioxide
Sulfur Hexafluoride
Xenon