Unannealed corrugated steel tube

Stahlmann stainless steel corrugated tubes are an ideal product for arranging utilities.
Due to these advantages, corrugated steel tube is used for laying various communications.

hot and cold water supply;

heating and piping of boilers;

cable conduits;

fire extinguishing systems;

water underfloor heating;

air conditioning and ventilation.

Advantages

Easy to cut and bend, which ensures easy installation;
When bending, the flow area of the tube is not disturbed, microcracks are not formed and mechanical stress of the metal does not occur;
Corrugated stainless steel tube is resistant to aggressive environments.

Features

Unannealed corrugated tube is ideal for straight sections of long runs due to its greater rigidity compared to annealed tube. The coefficient of linear expansion of steel corrugated tubes when heated is 20 times less than that of plastic pipes. What makes stainless steel corrugated pipe an ideal solution for heating systems.
Also, these tubes have zero oxygen permeability, which means that they do not allow oxygen to pass through, the presence of which leads to the formation of corrosion of other parts of the heating system made of ordinary steel, such as radiators or boiler heat exchangers. So, when using corrugated stainless steel tubes, you increase the service life of the entire heating system in your home.
Stahlmann steel corrugated tubes are an environmentally friendly solution: they are compatible with potable water. When using them, there is no risk of release of harmful substances under the influence of temperature.

Specifications

	Fitting size (conditional pass)
Index	DN15	DN20	DN25	DN32
Inner diameter, mm	14,1	21	27	32
Tube wall thickness, mm	0,3
Minimum number of corrugation peaks, pcs. by 100 mm	20	19	18	18
Outer diameter, mm	18,1	25,6	32	37,6
Maximum short-term allowable temperature, °с	400 (304 steel) / 550 (316L steel)
Working pressure, mpa	1,5
Minimum tube bending radius, mm	40	50	60	90
Breaking pressure at 20°c, mpa	21
Linear expansion coefficient 10-6.1/°с	17
Coefficient of thermal conductivity	17
Life time	30 years