You have to know the classification about the gas cylinder

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Currently, industrial gases, the most widely used to belong to bottled gas cylinders using the only quantity, but also more complex species.

Generalized gas cylinders should include different pressures, different volumes, different structures and different forms of storage materials for permanent gases, liquefied gases and dissolved disposable or reusable inflatable portable pressure vessel.

1. From the structural classification

From the structure roughly divided into seamless gas cylinders and welding gas cylinders, industrial gases at room temperature, filling most of the two gas cylinders. With ultra-low temperature filling science and technology development, liquid oxygen, liquid hydrogen, liquid argon, liquid gas, etc., but also need to be put into use cryogenic liquid gas cylinders.

1. Seamless gas cylinders

Oxygen, nitrogen, argon and other permanent gases or carbon dioxide, ethane, nitrous oxide and other high pressure liquefied gases, the use of seamless gas cylinders are filled. Its structure is as follows.

The typical structure of seamless gas cylinders

Gas cylinder internal volume in the world from around 0.13L to 70L for the majority (of Gas Cylinder Safety Supervision and seamless steel gas cylinders GB internal volume from 0.4L to 80L), especially long gas cylinders (about 3 .5 ~ 7.0m) of its volume of 130 ~ 500L, mainly for container, used as poised.

China's production of seamless gas cylinders less convex bottom (except for special gas cylinders respirator use), almost all of the good stability of the concave bottom gas cylinders.

2. Welding gas cylinders

Ammonia, chlorine, freon, liquefied petroleum gas and other low-pressure liquefied gases and acetylene welding gas cylinders are refilled using its shape varied, compared with the seamless gas cylinders, mostly short rough shape. Its representation structure is as follows:

The typical structure of welding gas cylinders

(1) deep red type gas cylinders (two gas cylinders assembled)

On the bottle, only a ring weld, a representative of the YSP-10 type, YSP-15-type LPG gas cylinders. Foreign 40 liters of acetylene gas cylinders also have this structure.

First put the bottle into the cup with a deep-drawing steel head, after a two-piece head assembly, with a ring welded into the body portion to weld.

(2) longitudinal weld gas cylinders (three gas cylinders assembled).

Bottle is the use of a bottle with rolled steel, then welded longitudinal seam, after the first two letters of the assembly and down, and then ring to weld phase. As YSP-50-type LPG gas cylinders, liquid chlorine, ammonia, acetylene gas cylinders.

(3) in the gas cylinders, as well as the ignition gas cylinders Used, refreshing drink with shells and other small gas cylinders of carbon dioxide gas cylinders.

2. From the material classification

As the gas cylinder material, naturally mostly of steel, seamless aluminum alloy gas cylinders but in recent years to meet the needs of special purpose began manufacturing and sales.

1. Steel gas cylinders

GB5099-85 respectively specifies the carbon (C), sulfur (S), phosphorus (P) and copper (Cu) of the upper limit of the content, but also provides a lower limit of acid-soluble aluminum content requirements, which are designed to ensure the performance of the gas cylinder needs.

(1) steel gas cylinders

Gas cylinders began manufacturing stage, at home and abroad are using such steel materials. Because of heavy gas cylinders, seamless gas cylinders now in volume of this material is basically no. The following foreign 0.5L liquefied carbon dioxide gas cylinders used for fire, still using carbon steel.

Welded steel gas cylinders, mostly carbon steel, and seamless gas cylinders used is carbon content of about 0.5% of the billet. Welded gas cylinders for good weldability, and strictly control the carbon content of not more than 0.22%.

(2) manganese steel gas cylinders

Domestic seamless gas cylinders, now use the fierce steel billets, only Anshan high container plant from American Terroir Dayton (Taylor-Wharthon Cryogenics) the introduction of a chromium-molybdenum steel gas cylinders quenching production line and testing commissioning, held in 1991 production technology appraisal. GB 5099-85 stipulates that the carbon content of not more than 0.44%, manganese content of not more than 1.4% to 1.8% limit these two elements, than the advanced state restrictions in this regard to loose some.

(3) Cr-Mo steel gas cylinders

Currently seamless gas cylinders used abroad, 85% are using chrome-molybdenum steel manufacture. And carbon steel, manganese steel gas cylinders compared to the corrosion resistance of chromium-molybdenum steel gas cylinders, ductility, toughness, low temperature performance is better, so that China's "Gas cylinder Safety Supervision" provisions should be used in cold areas such gas cylinders.

(4) stainless steel gas cylinders

As a special purpose, foreign matter seamless gas cylinders, or welding gas cylinders, have a small amount of manufacturing stainless steel. Generally contain nickel (Ni) 8%, chromium (Cr) 18%, also the use of Ni-Cr-Mo-V steel in. Purity gases, corrosive gases are required stainless steel gas cylinders. Precisely because of the low temperature impact properties of stainless steel is very good, so, cryogenic liquid gas cylinders must use stainless steel. Our seamless stainless steel gas cylinders in the standard has not been specified.

2. Aluminum gas cylinders

GB11640-89 "seamless aluminum gas cylinders" from June 1, 1990 came into effect.

This gas cylinder has a very good low-temperature impact resistance, lighter weight bottles (than carbon steel, manganese steel gas cylinders of light) and corrosion resistance and good.

3. Composite gas cylinders

The so-called composite gas cylinders bottle gas cylinders by means of two or more materials. For example; FRP gas cylinders. It is a metal material for the inner gas cylinder (also known as bottle bile), wrapping the outside of high-strength fibers and plastics curing composite gas cylinders as strengthening layer.

4. Other materials gas cylinders

There nickel (Ni) in a foreign country, copper (Cu) and other materials manufactured gas cylinders. Such materials are not useful for our manufactured gas cylinders.

3. From the filling medium classification

According to state gas filling time can be divided into permanent gas cylinders, liquefied gas cylinders and dissolved gas cylinders.

1. Permanent gas cylinders

Means as hydrogen, oxygen, as is a gas at room temperature is always a gas, but filled with compressed gas cylinders.

2. Liquefied gas cylinders

Means under normal temperature conditions, the compressed and liquefied gases, such as chlorine gas cylinders, LPG gas cylinders.

3. Acetylene gas cylinders

Means acetylene dissolved in acetone, and then stored in the gas cylinders with the filler, the resulting dissolved gases (in some countries, such as Japan no dissolved gas in the regulations, but also as a dissolved acetylene gas and oxygen, Like compressed hydrogen gas is known. Therefore, in the gas cylinder classification, only compressed gas cylinders and gas bottles into two categories).

4. From the manufacturing method of classification

1. Drawing-Ironing gas cylinders

This method is called on the international Earhart Act (E-type), refers to the stubby slab heating cup after punching, and then pull gas cylinders made of stretch and heal. Bottom punch stretching pulling into the legal system or the H-type gas cylinders mostly female, are the main types of seamless gas cylinders.

2. Pipe shut gas cylinders

This method is called on the international law Mannesmann (M-type), refers to the processing method will be closed at both ends of seamless steel pipe. This process for seamless gas cylinders made of mostly convex in the end, and then loaded on the base, in order to solve the stability problem standing gas cylinders. Such a small number of gas cylinders, and in foreign countries more than half efficiency of this type of gas cylinder, but they are convex to concave bottom-bottom Zaiding. Thus from the appearance and formal resolution of the gas cylinders on the bad.

3. Stamping stretch gas cylinders

This method is called ancient carbene (C-type) at the international level, refers to the growth of deep-drawing steel cup, and then the open end of the process method will be closed. This processing method material utilization is low, the process is complicated, it is not easy to spread. American PST Company (pressed Steel Tank co.INC) in this process for processing 71.36L larger gas cylinders.

These three processes refer to the manufacturing method of seamless gas cylinders.

4. Welding gas cylinders

Pat explained in the structure classification, it is omitted.

5. Wire around the gas cylinders

In the gas cylinder barrel external wrapping one or more layers of high-strength steel wire as a reinforcing layer in order to improve the strength of the composite gas cylinder barrel.

5. From the nominal working pressure or hydrostatic test pressure classification

Press the nominal working pressure or hydrostatic test pressure gas cylinders can be divided into:

1. High pressure gas cylinders

Nominal working pressure high pressure cylinders for 8 ~ 30Mpa, hydrostatic pressure testing for 12 ~ 45Mpa.

2. Low-pressure gas cylinders

Nominal working pressure high pressure cylinders for 8 ~ 30Mpa, hydrostatic pressure testing for 12 ~ 45Mpa.

6. From the requirements classification

1. General gas cylinders

Means no special requirements gas cylinders.

2. Special Gas cylinders

Refers to the electronics industry, aerospace, medical, security and other rescue with gas cylinders. Such gas cylinders or have special requirements on the structure, materials, manufacturing, or have special requirements in terms of performance.

7. From the shape classification

1. Bottle-shaped bottle

(1) concave bottom gas cylinders;

(2) convex bottom gas cylinders;

(3) the end of the gas cylinder with convex base;

(4) H-shaped bottom gas cylinders;

(5) bis lip gas cylinder;

2. Bucket gas cylinder means chlorine, ammonia welded barrel gas cylinders

3. Spherical gas cylinders.

4. Gourd-shaped bottle.

( From www.gasshow.com, Ttranslator: Gavin-SEFIC )