Maine Oxy | Specialty Gases and Welding Supplies

800-377-9433

Your First Choice for Gases, Welding & Innovative Solutions Since 1929

industrialgas

We offer the full range products to cover your specific application needs. In addition to pure gases, our Mig and Tig gas mixtures address a variety of applications and materials. Deliveries are dispatched from the store nearest you, So whatever your method and application, Maine Oxy has the gas you need.

 

  • icon Acetylene
  • icon Air
  • icon Argon
  • icon Carbon Dioxide
  • icon Helium
  • icon Hydrogen
  • icon Nitrogen
  • icon Oxygen
  • icon Propane

Acetylene, a compound of carbon and hydrogen, is a colorless, highly flammable gas. It is slightly lighter than air and has a garlic-like odor. Acetylene is manufactured by the reaction of water with calcium carbide, and is dissolved in acetone as a stabilizer for storage and transportation.

Acetylene is used for chemical synthesis and for oxy-acetylene cutting, heating and welding.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Acetylene AA Grade

99.6%

Oxygen plus CH4

PH3

< 4000 ppm

< 20 ppm

Acetylene Industrial

98.0%

   
Technical Information:Shipping Information:

Chemical Symbol: C2H2

Molecular Weight: 26.04

Specific Volume 14.7 ft3/lb (0.91 m3/kg)

CAS Registry Number: 74-86-2

DOT Proper Name: Acetylene, dissolved

Hazard Class: 2.1

I.D. Number: UN 1001

Labels: Flammable Gas

Sizes:

Cylinder Sizes Acet

Cylinder NameCubic FootPSIDimensions (inches)

MC

10

250

15 x4

B

40

250

23 x 6.5

WQ

75

250

31 x 7

WS

140

250

40 x 8.5

WK

250

250

42 x 13

WTL

390

250

44 x 14

 

 

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Ultra Zero

 

Total Hydrocarbons

Moisture

Oxygen

Carbon Dioxide

Carbon Monoxide

< 0.1 ppm

< 3 ppm

19.5% to 23.5%

< 1 ppm

< 1 ppm

Zero

 

Total Hydrocarbons

Oxygen

1 ppm

19.5% to 23.5%

Extra Dry

 

Moisture

Oxygen

< 8 ppm

19.5% to 23.5%

Technical Information:Shipping Information:

Chemical Symbol: N/A

Molecular Weight: 28.96

Specifi c Volume 13.3 ft3/lb (0.83 m3/kg)

CAS Registry Number: 132259-10-0

DOT Proper Name: Air, Compressed

Hazard Class: 2.2

I.D. Number: UN 1002

Labels: Nonflammable Gas

Sizes:

Cylinder Sizes Revised

Standard Cylinder Sizes *Contents ft3/m3Cylinder Pressure PSIGCGA Valve Connection

300

284

2400

590

200

213

2015

590

80

79

2015

590

*Nonstandard cylinder sizes available upon request

Argon is a non-flammable, colorless, odorless, chemically inactive gas which comprises less than 1.0% of the atmospheric air. Commercial argon is the product of air separation, where liquefaction and distillation produce a grade of low purity from which oxygen must be removed (by combining it with hydrogen to produce water).

Argon is widely used as a fill gas in incandescent and fluorescent lamps, and is an inert shielding gas for arc welding to protect the weld from contaminants.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification
Argon Research 99.9999%

Oxygen

Moisture

Nitrogen

Total Hydrocarbons

CO/CO2

< 0.15 ppm

< 0.15 ppm

< 0.40 ppm

< 0.10 ppm

< 0.10 ppm

Argon N2 Free 99.999%

Oxygen

Moisture

Nitrogen

Total Hydrocarbons

< 2 ppm

< 2 ppm

< 5 ppm

< 0.5 ppm

Argon Ultra High Purity 99.999%

Oxygen

Moisture

Total Hydrocarbons

< 2 ppm

< 2 ppm

< 0.5 ppm

Argon Pre-Pure 99.998%

Oxygen

Moisture

Total Hydrocarbons

< 5 ppm

< 5 ppm

< 2 ppm

Argon Zero 99.998% Total Hydrocarbons < 0.5 ppm
Argon Industrial 99.99%    
Technical Information:Shipping Information:

Chemical Symbol: Ar

Molecular Weight: 39.948

Specific Volume 9.7 ft3/lb (0.606 m3/kg)

CAS Registry Number: 7440-37-1

DOT Proper Name: Argon, Compressed

Hazard Class: 2.2

I.D. Number: UN 1006

Labels: Nonflammable Gas

Sizes:

Cylinder Sizes Revised

Cylinder NameCubic FootPSIDimensions (inches)
R 20 2015 18 x 5.5
60 60 2015 22 x 7
Q 80 2015 36 x 7
S 141 2015 46 x 7.25
K 227 2015 51 x 9
T 305 2400 55 x 9.25

Carbon Dioxide is a non-flammable, colorless, odorless gas with an acidic taste. Atmospheric air contains only 0.03% of Carbon Dioxide, so it is not a commercially feasible source; rather, numerous manufacturing processes furnish by-product streams from which carbon dioxide may be obtained, such as the combustion of coal and natural gas.

Carbon Dioxide is used to carbonate soft drinks, freeze and process food, and acts as a shielding gas in the arc welding process. It is also used extensively to fill fire extinguishers.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Carbon Dioxide Research

99.999%

Oxygen

Nitrogen

Carbon Monoxide

Hydrogen

Methane

Water

< 1 ppm

< 1 ppm

< 0.1 ppm

< 1 ppm

< 0.5 ppm

< 2 ppm

Carbon Dioxide Laser

99.995%

Moisture

Oxygen

Total Hydrocarbons

< 5 ppm

< 5 ppm

< 1 ppm

Carbon Dioxide Instrument

99.99%

Moisture

Oxygen

Nitrogen

< 10 ppm

< 20 ppm

< 50 ppm

Carbon Dioxide Bone Dry

99.8%

Moisture

< 20 ppm

Carbon Dioxide Industrial

99.8%

   
Technical Information:Shipping Information:

Chemical Symbol: CO2

Molecular Weight: 44.04

Specifi c Volume 8.76 ft3/lb (0.55 m3/kg)

CAS Registry Number: 124-38-9

DOT Proper Name: Carbon Dioxide

Hazard Class: 2.2

I.D. Number: UN 1013

Labels: Nonflammable Gas

Sizes:

CO2 Cylinder Sizes

Cylinder NameLbs.PSIDimensions (inches)

5

5

400

19 x 5

10

10

400

21 x 5

15

15

400

23 x 6

20

20

400

27 x 8

50

50

400

56 x 9

75

75

400

60 x 9

 

 

Helium is a non-flammable, colorless, odorless gas which is the second lightest element known. Its concentration in the atmosphere of just 0.0005% also makes it one of the most rare gases. Natural gas wells store helium and provide the principal source of this gas, which is extracted by a stripping process.

After hydrogen, helium has the smallest molecular cross-section of any gas. Its permeation rate and ease of detectability make it an ideal medium for leak detection. Helium is widely used as a shielding gas for arc welding and as an inter gas in the production of reactive materials, and safely fill the need to replace hydrogen in lighter-than-air applications.

Helium is also used for balloon filling.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Helium 7.0

99.99999%

Total of all impurities

< 100 ppb

Helium Research

99.9999%

Oxygen

Moisture

Nitrogen

Total Hydrocarbons

Carbon Monoxide

Carbon Dioxide

Total of all impurities

< 0.5 ppm

< 1 ppm

< 1 ppm

< 0.2 ppm

< 0.1 ppm

< 0.1 ppm

< 1 ppm

Helium Ultra High Purity

99.999%

Oxygen

Moisture

Total Hydrocarbons

< 2 ppm

< 2 ppm

< 0.5 ppm

Helium Pre-Pure

99.997%

Oxygen

Moisture

< 5 ppm

< 5 ppm

Helium Industrial

99.9%

   
Technical Information:Shipping Information:

Chemical Symbol: He

Molecular Weight: 4.003

Specific Volume 96.7 ft3/lb (6.0 m3/kg)

CAS Registry Number: 7440-59-7

DOT Proper Name: Helium, Compressed

Hazard Class: 2.2

I.D. Number: UN1046

Labels: Non-flammable Gas

Sizes:

Cylinder Sizes Revised

Cylinder NameCubic FootPSIDimensions (inches)

Cylinder Name

Cubic Foot

PSI

Dimensions (inches)

R

20

2015

19 x 5

60

58

2015

22 x 7

Q

74

2015

36 x 7

S

124

2015

46 x 7.25

K

201

2015

51 x 9

T

267

2400

55 x 9.25

 

 

Hydrogen, the lightest element, is a colorless, odorless, tasteless and flammable gas found at concentrations of about 100 ppm (0.01%) in the air. Sources for this gas are numerous, including dissociation of ammonia, electrolysis of water, and extraction from by-product streams of chemical and petroleum processing.

Hydrogen is widely used in the petroleum refinery processes of hydro treating and hydrocracking, and serves the food industry by turning inedible grease into soaps and animal feeds. In the welding industry, Hydrogen is used as a fuel in underwater oxy-hydrogen torches, and for metal welding and brazing. The space program also uses hydrogen as a rocket fuel when weight and energy considerations are paramount.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Hydrogen Research

99.9999%

Oxygen

Water

Nitrogen

THC

CO2 + CO

< 0.2 ppm

< 0.5 ppm

< 0.3 ppm

< 0.1 ppm

< 0.1 ppm

Hydrogen Ultra High Purity

99.999%

Moisture

Oxygen

Nitrogen

Total Hydrocarbons

< 3 ppm

< 1 ppm

< 5 ppm

< 1 ppm

Hydrogen Zero

99.995%

Total Hydrocarbons

< 0.5 ppm

Hydrogen Pre-Pure

99.99%

Moisture

Oxygen

< 10 ppm

< 20 ppm

Hydrogen Industrial

99.8%

   
Technical Information:Shipping Information:

Chemical Symbol: H2

Molecular Weight: 2.02

Specific Volume 192 ft3/lb (11.9 m3/kg)

CAS Registry Number: 1333-74-0

DOT Proper Name: Hydrogen, Compressed

Hazard Class: 2.1

I.D. Number: UN 1049

Labels: Flammable Gas

Sizes:

Cylinder Sizes Revised

Cylinder NameCubic FootPSIDimensions (inches)

R

20

2015

18 x 5.5

60

60

2015

22 x 7

Q

80

2015

36 x 7

S

122

2015

46 x 7.25

K

197

2015

51 x 9

T

261

2400

55 x 9.25

 

 

Nitrogen is a colorless, odorless, non-flammable gas which constitutes over 78.0% of atmospheric air. Commercial nitrogen is the product of air separation, and is used for inerting electrical systems and chemical manufacturing, and for food processing and packaging.

Due to its reactivity under the influence of high heat and chemicals, nitrogen is not used as a shielding gas in the welding industry. It is, however used as a purging and refrigerant gas, and has powered many impact wrenches in the motorsports world.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Nitrogen Research

99.9999%

Oxygen

Moisture

Total Hydrocarbons

CO/CO2

< 0.15 ppm

< 0.15 ppm

0.10 ppm

0.10 ppm

Nitrogen Ultra High Purity

99.999%

Oxygen

Moisture

Total Hydrocarbons

< 2 ppm

< 3 ppm

< 0.5 ppm

Nitrogen Prepurified

99.998%

Oxygen

Moisture

< 5 ppm

< 5 ppm

Nitrogen Zero

99.998%

Total Hydrocarbons

< 0.5 ppm

Nitrogen Industrial

99.9%

   
Technical Information:Shipping Information:

Chemical Symbol: N2

Molecular Weight: 28.01

Specific Volume 13.8 ft3/lb (0.86 m3/kg)

CAS Registry Number: 7727-37-9

DOT Proper Name: Nitrogen, Compressed

Hazard Class: 2.2

I.D. Number: UN 1066

Labels: Nonflammable Gas

Sizes:

Cylinder Sizes Revised

Cylinder NameCubic FootPSIDimensions (inches)

R

20

2015

18 x 5.5

60

60

2015

22 x 7

Q

80

2015

36 x 7

S

138

2265

48 x 7

K

277

2265

54 x 9

T

301

2400

60 x 10

 

 

Oxygen is a colorless, odorless and non flammable gas which is the earth's most abundant element. Combined in water as H2O and in other combinations, oxygen make up close to 50% of the earth's crust. The principal uses of oxygen stem from its strong oxidizing and life-sustaining properties.

Oxygen is used in the metals industry in conjunction with acetylene and other fuel gases in metal cutting, heating, welding, hardening, and scarfing. In the chemical and petroleum industries, oxygen is used in the production of synthetic gas from coal and liquid fuels.

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Oxygen Research

99.999%

Argon

Moisture

Nitrogen

Total Hydrocarbons

CO/CO2

< 5 ppm

< 2 ppm

< 5 ppm

< 1 ppm

< 1 ppm

Oxygen Ultra High Purity

99.993%

Argon

Moisture

Nitrogen

Total Hydrocarbons

< 40 ppm

< 3 ppm

< 10 ppm

< 0.5 ppm

Oxygen Zero

99.8%

Total Hydrocarbons

< 0.5 ppm

Oxygen Extra Dry

99.6%

Moisture

< 10 ppm

Oxygen Industrial

99.9%

   
Technical Information:Shipping Information:

Chemical Symbol: O2

Molecular Weight: 32

Specific Volume 12.1 ft3/lb (0.76 m3/kg)

CAS Registry Number: 7782-44-7

DOT Proper Name: Oxygen, Compressed

Hazard Class: 2.2

I.D. Number: UN 1072

Labels: Nonflammable Gas, Oxidizer

Sizes:

Cylinder Sizes Revised

Cylinder NameCubic FootPSIDimensions (inches)

R

20

2015

18 x 5.5

60

60

2015

22 x 7

Q

80

2015

36 x 7

S

141

2015

46 x 7.25

K

228

2015

51 x 9

T

307

2400

55 x 9.25

 

 

We offer multiple purities and cylinder sizes. See the chart below.

GradePurityImpuritySpecification

Propane Research

> 99.9%

Total Impurities

< 1000 ppm

Propane Instrument

> 99.5%

Total Impurities

< 0.5%

Propane Chemically Pure

> 99.0%

Total Impurities

< 1.0%

Propane Industrial

98.0%

   
Technical Information:Shipping Information:

Chemical Symbol: C3H8

Molecular Weight: 44.11

Specific Volume 8.5 ft3/lb (0.531 m3/kg)

CAS Registry Number: 74-98-6

DOT Proper Name: Propane

Hazard Class: 2.1

I.D. Number: UN1978

Labels: Flammable Gas

Cylinder Sizes Propane