About us

Alsima d.o.o. is a company with a twenty-year-old tradition of manufacturing stainless steel tubes that are used in electric tubular heaters industries as well as the manufacturing of home heating water boilers. The majority of our tube production is intended for our foreign buyers. This experience, along with our team of domestic experts has helped us design our new products.

Gallery Production




Diameters 7.5 8.0 9.5 10.0 12.0 14.0 16.0 18.0mm
Wall thickness 0.4 0.5 0.6 0.7 0.8 1.0 mm
Steel grade AISI 304, AISI 321, AISI 316, AISI 316L, AISI 316Ti, AISI 309S, ALLOY 800, ALLOY 825
Length from 500 mm to 6.000 mm
Length tolerance from 3.000 mm ± 1.5 mm
over 3.000 mm ± 5 mm
Wall thickness tolerance ± 10%
Outside diameter tolerance ± 0.07 mm
Maximum camber 1.0 mm/m
Inside weld bead < 0.10 mm
All tubes are marked
Packing: stackable wooden boxes fixed with stripes or wooden frame
Row material (strip) EN 10088-2
Welded tubes ISO 1127:1992; ISO 1129:1980; ASTM A 249/A


All tubes are Eddy Current tested according to DIN 54141, with PLC controlled selection, cutting and removing of defected tubes.

Destructive tube tests: Tube samples are taken in regular intervals for performing diameter expansion tests and tube flaring test according to ASTM: A269 - 13.1.

Kanthal products

We offer promt delivery of

A1 wire dia 1,2 – 5,5 mm

D wire dia 0,18 – 1,0 mm

Ni80 wire dia 0,20 – 0,60 mm

all other KANTHAL products on request.

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Raw materials for heaters

Magnesium oxide

Wire for terminal pins

Copper tubes

and others

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Tubes for tubular heating elements

Diameters 7,5 – 20 mm

Wall thickness 0,4 - 1,0 mm

Steel grade: AISI 304, 321, 316l, 316Ti, 309s, Incoloy 800, Incoloy 825

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Tubes for water heaters

Overflow tube for hot water

Inlet tube for cold water - spray

Diameters – 10,12 I 14 mm

Wall thickness : 0,4 mm

Steel grade: AISI 304 I AISI 316l

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Inox grill and grill bar

Portable grills and grill bars made from stainless steel

Both products are made of stainless steel that is resistant to corrosion and high temperatures. What is needed for cleaning and maintenance upon usage is solely a detergent for washing the dishes and hot water. Grill bars can be ordered in all dimensions and can be built in a yard grill.

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Construction for greenhouses made from prochrome steel tubes

The entire tubular construction of our greenhouses is made of stainless steel which makes it weather resistant and primarily to sun and precipitation. Supporting arcs are made of tubes 42mm in diameter while for the manufacturing of lateral reinforcements tubes of 20 and 18mm in diameter are used.

There are no changes in the construction upon usage which guarantees the possibility of dismantling and moving the greenhouse to another location. Standard dimensions of our greenhouses are 5m in width, 3m in height, and 20m in length. In addition, the dimensions of the greenhouse can be adjusted to meet the needs of the buyer.

Greenhouse heating

Thermal capacity of the boiler is Q=15kW and is intended for heating the area of 100m2.

The heating of the greenhouse is performed by corrugated stainless steel tubes that are positioned on the surface of the ground and through which the hot water is flowing. There is a chamotte furnace nearby and on its top there is an isolated hot water storage tank with the heat exchanger.

There are three types of furnaces - for biomass, wood and gas. The position of corrugated tubes can be changeable and adjusted to meet the needs of the ground heating depending on the plant and vegetable types that are being grown. There are Simprolit insulation panels 400mm in height.

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Corrugated stainless steel tubes

Wall thickness : 0,2 – 0,3 mm

Steel grade: AISI 304 i 316L

DN 10, DN 12 i DN 40

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