Metal hoses offer a wide range of solutions in different applications:
- To take up misalignment or thermal expansion
- To absorb vibrations or to facilitate repeating machine movements
BOA Metal hoses
Metal hoses offer a wide range of solutions in different applications:
The advantages when using BOA metal hoses are numerous, for instance:
During the fabrication of the BOA annular or parallel convoluted hoses, a thin walled longitudinal welded pipe is produced, which is then hydraulically formed into the required shape.
BOA Group standard program of annularly corrugated hoses:
The BOA Group offers a standard program of helically corrugated hoses:
During fabrication of BOA-DUO® and BOA-SUPRA® hoses, a narrow strip of stainless steel is formed in a double S-shape and subsequently rolled over a rotating axle. On the top of the convolution, a material overlap is made, and this point, being seam welded, forms a tight yet very flexible construction.
During the manufacturing of the BOA stripwound hoses, a stainless steel strip is profiled and rolled over a rotating centre. After forming the cylindrical cross-sections, the seams are crimped. BOA stripwound hoses are robust and flexible, and their construction allows various movements (also in an axial direction).
Stripwound hoses are always of limited tightness and are not recommended for conveying liquids and gases. These hoses are typically used for:
Three problems have to be considered if vibrations or sounds in a piping system shall be isolated and eliminated:
The vibration source (engines, compressors, pumps etc.) shall be solidly installed and smoothly run. To connect rigid piping to a vibrating engine part, elastic metal vibration absorbers are suitable, made of flexible metal bellows and sturdy fittings. The right choice depends on the operating conditions such as pressure, vibration frequency and temperature.
Flexible assemblies made of corrugated stainless steel hoses are proven as to be reliable and easy to fit connections in the sanitary and heating sector. Depending on the execution they connect washing machines and dishwashers to the water supply system. Fittings are provided according to current standards and norms. They meet the requirements of the waterworks and are approved by the respective authorities.
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