The C-steel pipe system

Closed loop system

Every material has its place – even in building services. Externally galvanised carbon steel pipes are ideal for circulating heating water without oxygen input – however, externally and internally galvanised carbon steel pipes are ideal for sprinkler systems and the compressed air supply.

STEELFIX C-steel can even be used for closed heating systems, wet sprinkler systems or compressed air systems. The assembly-friendly press-connection technology enables safe and fast work.

Link to the products for the product line STEELFIX carbon steel

Heating systems made of carbon steel are thin-wall, straight bead, precision steel pipes with a particularly low level of carbon content. A layer of zinc is applied thermally to the outside of the pipe. They are protected by a chrome coating. The pipes are tested and approved both internally and by external institutes. For closed heating systems, with or without antifreeze and for both dry and synthetic oil compressed air systems.

Operating conditions:Press-System: -35°C – 120°C/16 bar; tmax 150°C for short periods
Pipe Size:CF100 carbon steel pipe
d15, 18, 22, 28, 35, 42, 54, 76.1, 88.9, 108
CF110 carbon steel pipe with PP jacket
d15, 18, 22, 28
CF150 carbon steel pipe for sprinkler
d22, 28, 35, 42, 54, 76.1, 88.9, 108
Tests:ÖNORM EN 10305-3
Colour:CF100 – blank metal
CF110 – white
CF150 - blank metal
Special components:Viton O rings; resistant to temperatures up to 200°C;
SteelFIX CX/PE pre-insulated stainless steel pipe withSteel or HDPE jacket


Press components, d15-108 mm, made of carbon steel with EPDM seals. Sizes: d15-54 mm. Fittings are “leaked before pressed”

Press fittings:
Straight and elbow adaptors with male and female threads. Demountable flange and union fittings

Press profile: M