Sleeve (hose) pressure for welding 12 mm GOST 9356-75
are used to supply gases under high pressure to welding equipment: acetylene, propane, butane and oxygen for cutting metals, and gas welding. The gas hose is manufactured in accordance with strict requirements and standards, classified by the state standard GOST 9356-75. This International Standard applies to filament-backed rubber hoses used for pressurized supply of acetylene, city gas, propane, butane, fuel oil and oxygen to gas welding and metal cutting appliances.
Sleeves are efficient in areas with temperate and tropical climates at ambient temperatures from -35 to 70 °C and in areas with cold climates at temperatures from -55 to 70 °C.
Depending on the purpose, gas welding hoses are divided into the following classes:
I - for the supply of acetylene, city gas, propane and butane under a pressure of 6.3 kgf / cm2 (0.63 MPa) - a hose (sleeve) acetylene, propane; marking - red stripe along the entire length or without a stripe
II - for supplying liquid fuel: gasoline A-72 according to GOST 2084-77, white spirit according to GOST 3134-78; kerosene or mixtures thereof under pressure R 6.3 kgf / cm2 (0.63 MPa) - rubber sleeve (hose) for welding; marking - yellow stripe along the entire length
III - for supplying oxygen at a pressure of 20 kgf / cm2 (2 MPa), 40 kgf / cm2 (4 MPa) - oxygen hose (sleeve); marking - blue stripe along the entire length or without a stripe
Welding sleeve (gas hose) - designed for supplying various technical gases (acetylene, oxygen, propane-butane and some others) to gas welding and gas cutting equipment under high pressure, as well as for supplying liquid fuel. In electric gas welding, a welding sleeve for argon, carbon dioxide, and a mixture of shielding gases is used to supply a semi-automatic welding machine or a source for TIG welding.
As a rule, hoses for flame cutting and welding consist of an inner rubber layer in contact with the working gas, an outer rubber layer, which is often colored according to the purpose, and a cord (reinforcing layer) between them.
Operation of sleeves in temperature conditions from -35 °C to +70 °C is allowed; for cold climates in the range from -55°С to 70°С.
The symbol of the gas hose according to GOST 9356-75 contains:
product name;
class indication;
inner diameter in mm;
value of design pressure in MPa;
Climatic performance.
An example of a symbol for a class III welding oxygen hose with an inner diameter of 9 mm, designed for a working pressure of 2 MPa, designed to work in areas with a cold climate: Sleeve III-9-2-KhL GOST 9356-75.
If you are going to buy a welding sleeve, be sure to check it for flexibility, elasticity, wall thickness of the rubber layers, and the resistance of the thread frame. Also pay attention to the connection of the outer and inner rubber layers through the thread frame. If it is of insufficient quality, then hernias will soon form, the sleeve does not hold pressure. Many unscrupulous manufacturers, in order to save money, add plastic to the rubber composition, which negatively affects the performance of the sleeves, especially in the cold season. The sleeve does not withstand low temperatures and cracks.
Therefore, when choosing hoses, it is necessary to take into account that frost-resistant hoses should be purchased for operation at a temperature of -40 ° C and below, and petrol-resistant hoses for use with a kerosene cutter, petrol cutter. Any hose for gas welding must be flexible, not have damage in the form of cracks, delaminations and swellings. When bending, the diameter of the sleeve cannot decrease by more than 10%.
If you need a welding sleeve for semi-automatic, argon-arc welding, then a class I rubber hose (red), the same as for combustible gases (acetylene, propane), is suitable for you.
When working, make sure that the sleeves are not pinched or twisted. Store sleeves in a clean, dry place away from direct sunlight to prevent gas leakage. Avoid sparks, splashes, flames and aggressive substances that can damage the rubber layer and the thread braid of the sleeves.
The propane hose (acetylene) is red. This element of the welding inverter is made of rubber with a fabric frame. Used to supply high pressure acetylene or propane to instruments. The material is high-strength, flexible, thus ensuring high-quality work. When working with a hose for acetylene and propane, you should be careful, follow the rules for handling gas equipment, and avoid storing it with coils of wire. Thus, it is not necessary to allow bending of the hoses, tangling with the wire coil.
These products are stored in a dry place, protected from dust and sunlight, while the wires should be laid separately, as the wire can confuse or damage the equipment. Operating temperature limits at which a semi-automatic sleeve or other device can be used, invertedtorus, as well as other welding equipment, range from -30 to +70 gr. WITH.
Performance characteristics
The multifunctional rubber sleeve can be used in both gas welding and cutting equipment. According to GOST 9356-75, supply hoses are divided into 3 main classes.
For supplying urban reptile, acetylene, propane and butane under a pressure of 0.63MPa. the color designation of this class is red.
Sleeve for liquid fuel, gasoline, kerosene and kerosene mixtures, white spirit under pressure. Indicated in yellow.
For supplying oxygen at a pressure of 2 or 4 MPa. Color coding in blue.
The designation of the class and possible pressure may be a stripe on the black hose. It is also possible to use the classic black color for any class.
Operation is allowed at temperatures from -35 to +70 degrees. Special modifications for work in cold climates have a range of operating values from -55 to +70 degrees.
What should be labeled
Product class
Inner diameter
Design working pressure
Appointment by climate zone
For argon welding and semi-automatic, a class 1 gas hose is required, marked in red or with a stripe.
Visual parameters of the product
When choosing, it is necessary to check the welding sleeve for flexibility and elasticity. When bending, the diameter can decrease by no more than 10%. The sleeve should not be flattened, squeezed. It is also necessary to check the absence of external damage, swelling, cracks.
When purchasing, pay attention to the lead-in mouthpieces. The shape may vary. It is necessary to choose the form that is optimal for each type of welding. It is not recommended to change the configuration of the gas hose on your own.
Storage and operation
When working, avoid splashes of metal or aggressive substances, flames, sparks on the welding sleeve. There are special protective covers that protect flexible equipment from welding sparks during operation of the semiautomatic device. It is also necessary to avoid twisting, squeezing and pinching.
The pressure gas hose must be stored separately, in a clean, dry place, after removing fuel or other substances from it. Avoid placing the hose in direct sunlight.
You can buy a Sleeve (hose) pressure head for welding 12 mm GOST 9356-75 from us at the best price in Ukraine. A wide range of products allows us to quickly and efficiently fulfill any order, helping to complete any construction work on time.
