بایگانی‌های Nasim Sobh Farda - Page 3 of 5 - dawnbreeze

Hydrogen sulfide

What is hydrogen sulfide?

  • Hydrogen sulfide gas has a very strong odor similar to rotten eggs.
  • Hydrogen sulfide, or sulfide ion, acts as a catalyst in the absorption of hydrogen on the surface of metals, leading to the rapid brittleness of metals.
  • In areas where the air is not flowing, leaking very small amounts of hydrogen sulfide can be very dangerous.
  • If hydrogen sulfide comes in contact with any part of the body or eyes, be sure to rinse the area with plenty of clean water for 15 minutes.

Available grades:

  • Hydrogen sulfide is present only in the liquid phase with a purity of %99.5 and %99.99.

Tanks and maintenance:

  • A group of cylinders is suitable for charging hydrogen sulfide.
  • The maximum weight of the cylinder charge is %62.5 of the weight of the cylinder intake.
  • Hydrogen sulfide is also transported and stored in special tanks in bulk.

Compatible and incompatible materials:

  1. Anhydrous hydrogen sulfide under pressure and ambient temperature are compatible with carbon steel and ferrous iron.
  2. Hydrogen sulfide itself isn’t corrosive to Steel.
  3. Substances such as impurities, pH, specific abrasion conditions, or mechanical and thermal stresses on metals can cause severe corrosion.
  4. Teflon, VITON, and KEL-F are polymers compatible with hydrogen sulfide.

Physical properties

Molecular Weight 34.08
steam pressure 1579 K. Pa @ 15.6 0C
Gas density 26.55 Kg/m3 @ 15.6 0C and 1 atm
Latent heat of vaporization at 15.6 C 444.5 KJ/Kg
Specific heat capacity at the temperature of

15.00C  and 1 atm

 CP=1.014 KJ/Kg.0C

CV=0.7643 KJ/Kg.0C

CP/CV=1.327
Critical temperature  100.5 0C
Critical pressure 9008 KPa(a)
Solubility in water 0.0292 vol.(gas)/Vol.(Water) at 200C and 1 atm
Boiling point -103.8  0C
Explosion / ignition range in air  Flammable Gas/Poison Gas

Compatibility with materials

Material Compatibility of Hydrogen sulfide

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

O

Kalrez
GAS

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safty

Dangerous Products classification:

Dangerous Products Transport Information:

IATA IMDG DOT
UN 1053 UN 1053 UN 1053 UN NUMBER
Hydrogen sulfide Hydrogen sulfide Hydrogen sulfide UN SHIPPING NAME
2.1/2.3 2.1/2.3 2.1/2.3 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Sulfur Dioxid

What is Sulfur Dioxide?

  • Sulfur dioxide is a combination of oxygen and sulfur.
  • In normal conditions, at normal temperatures and pressures, sulfur dioxide is a colorless gas with a very nasty odor that can cool and compress and turn into a colorless liquid.
  • This gas at a pressure of 1 atmosphere and Its boils at the temperature of  10 C
  • This gas at temperature  -9.75 C Freezes.
  • Liquid sulfur dioxide is heavier than water and in the gas phase, it weighs twice as much as air.
  • It is also non-flammable in any of the liquid and gaseous phases and is stable in a chemical bond.
  • This gas becomes very corrosive to metals in the presence of a very small amount of water, sulfur dioxide, except in the presence of lead, stainless steel 316, and special alloys.
  • The Special glass and plastics are resistant to impure (hydrated) sulfur dioxide.

Available grades:

% 9.99 in the liquid phase

Tanks and maintenance:

  • Sulfur dioxide can be charged in pressurized cylinders.
  • This gas can also be charged and transported in tons of tanks, portable flasks, and cargo tanks.

Compatible and incompatible materials:

  1. In a Short temperature range, carbon steels can be exposed to sulfur dioxide without water.
  2. Sulfur dioxide has moisture, in the presence of corrosive carbon steel.

Physical properties

 

Molecular Weight 64.06
steam pressure 49.1 K. Pa @ 21.1 0C
Gas density 1.261 Kg/m3 @ 0 0C and 1 atm
The latent heat of evaporation at the boiling point  361.5 KJ/Kg
Specific heat capacity at a temperature of 25.0  and 1 atm

CP=0.622 KJ/Kg.0C

CV=0.485 KJ/Kg.0C

CP/CV=1.28
Critical temperature 157.4 0C
Critical pressure 7880 KPa(a)
Solubility in water 22.97 vol.(gas)/Vol.(Water) at 00C and 1 atm
Boiling point -10.0  0C
Explosion / ignition range in air Poison Gas

 

 

Compatibility with materials

Material Compatibility of Sulfur dioxide

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

Updating

Kalrez
GAS Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safty

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1079 UN 1079 UN 1079 UN NUMBER
Sulfur dioxide Sulfur dioxide Sulfur dioxide UN SHIPPING NAME
2.3 2.3 2.3 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Xenon

What is Xenon?

  • Xenon is the number 54 element of the periodic table.
  • This element is odorless, whether in gaseous or colorless liquid.
  • This gas has a density of 5,8671 grams per liter (air = 1.29) and has a boiling point Is -108. 12 C. and melting point is 106.9C.
  • This gas is non-combustible, non-toxic, and chemically inert.
  • Fractional distillation of liquid air is called xenon.

Physical properties

Molecular Weight 131.3
steam pressure 100 K. Pa @ -108.15 0C
Gas density 5.472 Kg/m3 @ 21.1 0C and 1 atm
Latent heat of vaporization at boiling point (triple point) 17.6 KJ/Kg
Special heat capacity CP=0.269 KJ/Kg.0C

CV=0.096 KJ/Kg.0C

CP/CV=1.667
Critical temperature 16.60C
Critical pressure 5840 KPa(a)
Solubility in water 0.108 vol.(gas)/Vol.(Water) at 20 0C and 1 atm
Explosion / ignition range in air  Non-Flammable Gas

Compatibility with materials

Material Compatibility of Xenon

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

O

Kalrez
GAS

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safety

Classification of dangerous Products:

Dangerous Products Transport Information:

(For refrigerated liquid)   :UN 2591

IATA IMDG DOT
UN 2036 UN 2036 UN 2036 UN NUMBER
Xenon, compressed Xenon, compressed Xenon, compressed UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Krypton

What is Krypton?

  • Krypton is a chemical element with the symbol of Kr
  • It has an atomic number of 36 and an atomic mass of 83.80, which has six stable isotopes and several radioactive isotopes.
  • Krypton is a noble gas Which has ranks fourth in the periodic table.
  • This colorless, odorless gas is 1.18 times heavier than air.
  • Krypton also combines with fluorine at the temperature of liquid nitrogen due to electrical discharge.

 

 

 

 

 

 

 

 

Physical properties

Molecular Weight 83.80
steam pressure 1 K. Pa @ -153.15 0C
Gas density 3.479 Kg/m3 @ 21.1 0C and 1 atm
Latent heat of vaporization at boiling point (triple point)  19.57 KJ/Kg
Special heat capacity CP=0.251 KJ/Kg.0C

CV=0.146 KJ/Kg.0C

CP/CV=1.69
Critical temperature 16.60C
Critical pressure 5840 KPa(a)
Solubility in water 0.0594 vol.(gas)/Vol.(Water) at 200C and 1 atm
Explosion / ignition range in air  Non-Flammable Gas

Compatibility with materials

Material Compatibility of Krypton

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

O

Kalrez
GAS

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safety

Classification of dangerous Products:

Dangerous Products Transport Information:

(For refrigerated liquid)   :UN 1970

IATA IMDG DOT
UN 1002 UN 1002 UN 1002 UN NUMBER
Krypton, compressed Krypton, compressed Krypton, compressed UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Argon

What is Argon?

  • Argon is one of the chemical elements denoted by Ar and It has an atomic mass of 18.
  • The third-largest gas in the atmosphere is argon (about %0.934 of air is argon).
  • Almost all of the argon in the air is the 40-argon isotope, while in the major argon space it is the 36-argon Isotope.

Other Information About Argon:

  • Argon belongs to the family of rare and inert gases of the periodic table.
  • Argon is a colorless, odorless, tasteless, and non-toxic gas that is completely inert and has no known chemical composition at room temperature, and it’s slightly soluble in water.

Physical properties

Molecular Weight 39.95
steam pressure 100 K. Pa @ -186.15 0C
Gas density 1.650 Kg/m3 @ 21.1 0C and 1 atm
The latent heat of evaporation at the boiling point 162.3 KJ/Kg
Special heat capacity CP=0.523 KJ/Kg.0C

CV=0.314 KJ/Kg.0C

CP/CV=1.67
Critical temperature -122.3 0C
Critical pressure 4906 KPa(a)
Solubility in water 0.056 vol.(gas)/Vol.(Water) at 00C and 1 atm
Explosion / ignition range in air Non Flammable

Compatibility with materials

Material Compatibility of Argon

METALS PLASTICS ELASTOMERS
ALUMINUM CARBON STEEL CAST/DUCTILE IRON 304 STAINLESS STEEL 316 STAINLESS STEEL CUPPER BRASS POLY ETHYLENE POLY PROPYLENE NYLON PTFE – TEFLON PVDF PVC BUNA-NATURAL RUBBER NBR EPR-EPDM VITON
GAS A A A A A A A A A A A A A A A A A
Liquid D D D B C D C D D D C D D D D D D

A: EXCELLENT
B: GOOD
C: FAIR TO POOR
D: NOT RECOMMENDED

Safty

Classification of dangerous Products:

Dangerous Products Transport Information:

IATA IMDG DOT
UN 1006 UN 1006 UN 1006 UN NUMBER
ARGON , COMPRESSED ARGON , COMPRESSED ARGON , COMPRESSED UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Chlorine

What is chlorine?

  • Chlorine is a non-flammable and can be find in light greenish-yellow gas
  • Chlorine has a nasty odor and is 2.5 times heavier than air, and it is very irritating if the gas is inhaled.
  • Liquid chlorine Has amber color , one and a half times heavier than water.
    Chlorine is non-flammable in both gaseous and liquid forms. However, chlorine, like oxygen, can help burn matter. Many organic matter React chemically with chlorine.
  • Chlorine dissolves in very small amounts in water, when it reacts with pure water, it forms compounds of hydrochloric acid and hypochlorous acid (ingredients of bleaches, disinfectants, deodorants, isoxide oxides).

Available grades:

%99.999-% 99.99 – %99.9

Tanks and maintenance:

  • The Maximum allowable capacity to fill chlorine tanks %125 by weight of water at a temperature of 15.6 C0.
  • Chlorine is stored and transported in cylinders with a storage volume of less than 68 kg and also tanks with a capacity of 1000-900 kg called tank tons.

Compatible and incompatible materials:

  • At normal temperatures, chlorine doesn’t corrode steel without moisture (whether liquid or gas), and if there is moisture, there will be a lot of corrosion due to the formation of hydrochloric acid and hypochlorous acid.
  • Therefore, It should be care to keep chlorine away from moisture.
  • Containers, pipes and valves should be closed so that moisture in the atmosphere stays out of the system and does not mix with chlorine.

 

Physical properties

Molecular Weight 28.01
steam pressure 100 K. Pa @ -196.15 0C
Gas density 1.153 Kg/m3 @ 21.1 0C and 1 atm
The latent heat of evaporation at the boiling point  199.1 KJ/Kg
Special heat capacity CP=1.04 KJ/Kg.0C

CV=741 KJ/Kg.0C

CP/CV=1.307
Critical temperature -146.90C
Critical pressure 3399 KPa(a)
Solubility in water 0.019 vol.(gas)/Vol.(Water) at 200C and 1 atm
Explosion / ignition range in air  Flammable Gas

Compatibility with materials

Material Compatibility of Nitrogen

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

Updating

Kalrez
GAS Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safty

Classification of dangerous Products:

Dangerous Products Transport Information:

IATA IMDG DOT
UN 1066
 UN 1066 UN 1066 UN NUMBER
Nitrogen, compressed Nitrogen, compressed Nitrogen, compressed UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Oxygen

What is oxygen?

  • Oxygen is a colorless, odorless, tasteless, gaseous element that supports human life, and It’s combustible, It makes 1/5 of the atmosphere.
  • (%20.95 by volume of the atmosphere and %32.5 by weight of atmosphere) Oxygen at low temperature(0 -184 C), clear, the very light blue liquid that is slightly heavier than water
  • All elements, except neutral gases, combine with oxygen and create The oxides form. Oxygen is non-flammable but greatly intensifies the combustion process

Available oxygen grades:

% 99.9999,% 99.9995,% 99.999,% 99.995,% 99.6

Tanks and maintenance:

  • Oxygen can be charged in the gas form and under pressure in cylinders as well as in trailer tubes.
  • Liquid oxygen is transported and stored in portable flasks and cryogenic tanks.

Compatible and incompatible materials:

  • Gaseous oxygen is non-corrosive and can be used in systems made of ordinary metals. At the temperature of oxygen liquefaction, carbon steels and steel alloys lose their malleability and they aren’t suitable for exposure to oxygen.
  • Metals and alloys are suitable for exposure to oxygen at liquid temperatures include: stainless steel (eg 316,304), nickel and chromium alloys, nickel, Monel 400, copper brass, bronze, and austenitic aluminum alloys.
  • Oxygen contact systems and piping must be free of any combustible materials, grease or oil.

Physical properties

Molecular Weight 31.9988
steam pressure 100 K. Pa @ -183.15 0C
Gas density 1.326 Kg/m3 @ 21.1 0C and 1 atm
The latent heat of evaporation at the boiling point 213 KJ/Kg
Special heat capacity CP=0.9192 KJ/Kg.0C

CV=0.6577 KJ/Kg.0C

CP/CV=1.40
Critical temperature -118.60C
Critical pressure 5043 KPa(a)
Ability to dissolve in water 0.0489 vol.(gas)/Vol.(Water) at 00C and 1 atm
Explosion / ignition range in air Non Flammable

Compatibility with materials

Material Compatibility of OXYGEN

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

O

Kalrez
GAS S C O C S S S O O O O O C U O O O

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safty

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1072 UN 1072 UN 1072 UN NUMBER
Oxygen, compressed Oxygen, compressed Oxygen, compressed UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Nitrogen

What is Nitrogen?

  • Nitrogen makes the most layer of the atmosphere, which means that it’s include%78.08 of the air volume and %75.5 of the air weight.
  • Nitrogen gas is colorless, odorless, tasteless, non-toxic and almost neutral and colorless in liquid form.
  • Nitrogen is non-flammable and has no role in combustion. This gas combines with some active metals such as lithium and magnesium also a type of nitrate.
  • This gas has the ability to combine with hydrogen, oxygen and other elements at very high temperatures dissolve very little nitrogen in water and other liquids and is also a very poor conductor of electricity and heat.

Available nitrogen grades:

%99.9999 – %99.9995 – %99.999 – %99.998 – %99.99 – %99.9

Tanks and maintenance:

  • The gas-phase of Nitrogen can be transported and stored in pressurized Venice cylinders in trailer tubes.
  • Nitrogen in the liquid phase is transported and stored in small portable fluxes and cryogenic tanks

Compatible and incompatible materials:

  • Nitrogen is a neutral, non-corrosive gas that can be used in all systems made of ordinary metals.
  • At liquid nitrogen temperatures, carbon steels and many steel alloys lose their malleability.
  • Suitable materials for use in the presence of liquid nitrogen are stainless steel (eg types 304 and 316) and other alloys of nickel, chromium, copper, monel, brass and austenitic aluminum.

Physical properties

Molecular Weight 70.906
steam pressure 786.7 K. Pa @ 21.1 0C
Gas density 3.2127 Kg/m3 @ 0 0C and 1 atm
The latent heat of evaporation at the boiling point  288.08 KJ/Kg
Special heat capacity CP=0.48422 KJ/Kg.0C

CV=0.36 KJ/Kg.0C

CP/CV=1.334
Critical temperature 143.750C
Critical pressure 7977.5 KPa(a)
Ability to dissolve in water 0.7% vol.(gas)/Vol.(Water) at 0 0C and 1 atm
Explosion / ignition range in air Poison gas , Oxidizer

Compatibility with materials

Material Compatibility of Nitrogen

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

Updating

Kalrez
GAS Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safty

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1017
 UN 1017 UN 1017 UN NUMBER
Chlorine Chlorine Chlorine UN SHIPPING NAME
2.3,5.1 2.3,5.1 2.3,5.1 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Helium

What is Helium?

  • Helium is a monoatomic molecule. Helium is the lightest element after hydrogen and has the smallest molecular cross section among gases.
  • It is one of the rare gases in the atmosphere. It is completely neutral in chemical reactions. The thermal conductivity of helium over other rare gases makes helium superior to other rare gases.
  • Helium is non-flammable and only slightly soluble in water

Available grades:

%99.9999 -%99.9995 -%99.999 -%99.998

Tanks and maintenance:

  • Helium gas can be transported and stored in cylinders – tanks and trailer tubes in accordance with the DOT standard and TC rules.
  • Liquid helium transported as cryogenic fluid in insulated (cryogenic) cylinders and cryogenic tanks

Compatible and incompatible materials:

  • Helium gas is a neutral and non-corrosive , Also its compatible with all common metals.
  • In the presence of liquid helium, carbon steels and many alloys lose their conductivity.
  • Liquid metals compatible with helium include :
    stainless steel 8-18, austenitized nickel-chromium alloys, copper, Monel, brass and aluminum.

Physical properties

Molecular Weight 4.00
steam pressure 100 K. Pa @ -268.94 0C
Gas density 0.0165 Kg/m3 @ 21.1 0C and 1 atm
Latent heat of vaporization at the boiling point 20.28 KJ/Kg
Special heat capacity CP=5.19 KJ/Kg.0C

CV=3.121 KJ/Kg.0C

CP/CV=1.66
Critical Temperature -268.90C
Critical Pressure 227 KPa(a)
Ability to dissolve in water 0.0094 vol.(gas)/Vol.(Water) at 00C and 1 atm
Explosion / ignition range in air  Non-Flammable Gas

Compatibility with materials

Material Compatibility of Helium

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

O

Kalrez
GAS

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safty

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1046
 UN 1046 UN 1046 UN NUMBER
Helium, compressed Helium, compressed Helium, compressed UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

Hydrogen

What is hydrogen?

  • Hydrogen is a colorless, odorless, tasteless, non-toxic and flammable gas.

  • This element is present in the form of gas at ambient temperature and atmospheric pressure.

  • This gas is known as the lightest gas and with a density of approximately %0.07 of air with an invisible flame of hydrogen in the presence of air with a blue flame is very faint and in many cases burns with an invisible flame.

Available hydrogen grades:

%99.9999 -%99.999 – %99.99 – %99.5

Tanks and maintenance:

  • Hydrogen gas is portable in cylinders, trailer tubes and pressure vessels.

  • Liquid hydrogen can be stored and transported at room temperature in multi-crusted cryogenic tanks for liquid hydrogen.

Compatible and incompatible materials:

  • Non-corrosive hydrogen gas at pure temperature can be in contact with ordinary metals.

  • Ordinary carbon steels lose their conductivity at the temperature of liquid hydrogen and become very brittle.

Suitable for standing to liquid hydrogen:

  • Austenitized nickel chromium (stainless steel), copper, copper-silicon alloy, aluminum, monel, and some brass and bronze alloys are suitable for exposure to liquid hydrogen.

 

Physical properties

Molecular Weight 2.016
steam pressure 100 K. Pa @ -253.13 0C
Gas density 0.08342 Kg/m3 @ 21.1 0C and 1 atm
Latent heat of vaporization at the boiling point 446 KJ/Kg
Special heat capacity CP=14.34 KJ/Kg.0C

CV=10.12 KJ/Kg.0C

CP/CV=1.42
Special heat capacity -239.960C
Critical pressure 1316 KPa(a)
Solubility in water 0.019 vol.(gas)/Vol.(Water) at 15.60C and 1 atm
Explosion / ignition range in air  Flammable Gas

Compatibility with materials

Material Compatibility of Hydrogen

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

 Viton® Buna-N Neoprene Polyurethane

O

Kalrez
GAS

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Safety

Classification of dangerous goods:

Dangerous Goods Transport Information:

 

IATA IMDG DOT
UN 1049 UN 1049 UN 1049 UN NUMBER
Hydrogen, compressed Hydrogen, compressed Hydrogen, compressed UN SHIPPING NAME
2.1 2.1 2.1 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD

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