The pressure standard for a metal hose is usually based on factors such as the design of the hose, the material, the number of braided layers, and the thickness. The pressure that a metal hose can withstand can range from a few lower kilopascals (kPa) to very high megapascals (MPa). Here are some overviews of pressure standards for metal hoses, compiled from previously gathered information:
Minimum operating pressure：
According to the requirements of special equipment manufacturing qualification, the maximum working pressure of metal hoses needs to be greater than or equal to 0.1 MPa (gauge pressure).
Typical pressure range：
Small diameter metal hoses (3mm-25mm inner diameter) may withstand pressures up to 300 kg force/cm2 (approximately equal to 30 MPa).
Larger metal hoses, such as one inch (approximately 25mm), six quarters (approximately 19mm), and four quarters (approximately 12mm), can withstand a pressure of approximately 60 kg force/cm2 (approximately equal to 6 MPa).
A hose of one inch, two to four inches (about 32mm to 100mm) can generally withstand a pressure of about 25 kg force/cm2 (about equal to 2.5 MPa).
For metal hoses over four inches (about 100mm or more), the pressure range is generally 16 kg force/square centimeter (about equal to 1.6 MPa) or less.
Higher pressure range：
For metal hoses installed in pressure pipes, the pressure range is generally PN0.6 to 32.0 MPa.
Some metal hoses can even reach a high pressure of 42.0 MPa.
Design pressure：
The design pressure is the maximum pressure that a metal hose can safely withstand, for example, it is mentioned that the design pressure of a metal hose can reach 3.0 MPa.
The pressure standard of a metal hose may also be affected by:
braided layer: Metal hoses may be woven from one or more layers of stainless steel wire or steel strip, the more woven layers, the better the pressure resistance of the hose.
Materials: Different metal materials, such as stainless steel, copper, aluminum, etc, have different strength and corrosion resistance, which can affect the pressure bearing capacity of the hose.
Application Environment: The environment in which the hose is used, including temperature, properties of the medium (e.g. corrosiveness, toxicity), etc., will also have an impact on the pressure standard.
When selecting metal hoses, it is important to take into account the specific needs of the application, including but not limited to pressure, temperature, media compatibility, bending radius, length, and installation conditions. Ensure that the choice of metal hoses meets relevant industry standards and specifications, such as ASME, DIN, EN, etc., to ensure safety and reliability. If a pressure standard for a specific type of metal hose is required, refer directly to the technical data or specification sheet provided by the manufacturer.