We manufacture metal hoses for transport of liquids and gases resistant to high operating temperatures and pressures. Due to individual approach and technically advanced team, we are able to design and produce any atypical connection. We supply our products to all industrial sectors worldwide - whether it is the chemical or petrochemical industry, the gas industry, the power industry or the steel industry. We are active wherever metal hoses and compensators are required.
Our hoses meet the requirements of EU Directive 97/23 / EC, which was changed to L189 / 164, the so-called Pressure Equipment Directive оn 27.06.2014, in terms of material, manufacturing processes and construction specifications.
Types of connections:
- quick couplings
- special - NPT thread, ANSI flanges, etc.,
- atypical design
TYPE HR I / S - STANDARD PROFILE
Metal hose with standard waves pitch. The hose may be provided with one or two braids.
TYPE HR I / E – NARROW PROFILE
Narrow metal hose for better flexibility made of butt-welded pipe. The hose may be provided with one or two braids
HR I / H TYPE - HIGH PRESSURE PROFILE
Metal hose with standard waves pitch and thick-walled profile for higher pressures. The hose may be provided with one or two braids.
TYPE HR II / A - FOLDED FLAT PROFILE
Protective folded spiral hose - flat profile.
- Fixed / swivel flanges
- Clad pipes "F10"
- Mouthpieces with external / internal thread "G05, G10, H40, K05, K10"
- Conical pipe nipples
- Flat pipe nipples
- Three-piece fittings
- Special on request
Stainless corrugated hoses have a robust design and therefore they are particularly suitable for difficult operating conditions. However, when installing them, it is necessary to follow certain principles to ensure their long service lifetime.
- Even when installing the hose on the fitting itself, torsional stress (twisting) must be avoided so that the hose is not subjected to a torque load. When screwing the hose end into the fitting, the torque must be transmitted only by the pipe end. For hoses with screws or cap nuts, the pipe end must be secured with a counter-key. When assembling, the connection points must not rotate. The connection points must be moved in one plane to avoid twisting the hose.
- The hoses must not have a sharp bend both at the end piece and over its entire length (e.g. by mechanical loading in the perpendicular direction at the pipe end).
- The minimum hose radius shown in the tables must be respected.
- During operation, it is necessary to ensure regular visual inspection of leaks or damage. In addition, pay attention to the cleanliness of the hose and its surroundings, in order not to limit its flexibility and consequent damage.
- Hose damage should be avoided by abrasion or sharp edge damage because any deformation or thinning of the hose wall substantially reduces its service lifetime.
Below some typical installation errors and ways to avoid them are listed.
Winding can cause damage to the metal hose if the hose is wound onto the smaller than the allowable radius. The proper winding and unwinding of the metal hose helps to avoid this error.
If the hose length is too short, it will break at the attached pipe ends. To the length calculated from the bend radius, the same part of the length of the 3-5 x DN is added to each side. Choosing a larger bend radius than the smallest one allowed, significantly extends lifetime of the hose.
By placing the hose in the seat or on the pulley, we prevent unwanted bending.
Incorrect installation of metal hoses leads to strong flexural stresses behind the attached pipe ends. Adding an arc fitting will remove this deficiency.
If the braid is removed from the hose, the hose pressure resistance is reduced. Axially-mounted metal hoses with braid are not suitable as motion compensators. By adding an arc fitting this deficiency will be removed.
Torsional movements, which most often occur in the incorrect installation, lead to premature damage of the metal hose. Make sure that the pipe axes are installed in parallel and that the axes of the hoses and the direction of their movement are in one plane.
Poor connections, as shown on the left, should be avoided. If this is not possible, use a support or a cylinder.