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Welding/Gas - 20 bar - orange/blue - ISO 3821 (EN 559)



Blue hose – a flexible hose for transporting oxygen with air (oxygen content > 20%), for welding and cutting, for arc welding using shielding gas and related processes.

Orange hose – a flexible hose for transporting liquid gas (LPG) for welding and cutting. Also suitable for CNG and methylacetylene and propandiene mixes (MPS).


ISO 3821:2019 (formerly EN 559:2003).

Temperature range

-30°C / +70°C.

Safety factor

3 : 1


Oxygen: EPDM, black, smooth.
PB: SBR/NBR, black, smooth.


Textile spiral.


Oxygen: EPDM, blue, smooth.
PB: EPDM orange, smooth.


continuous inkjet on blue hose, white letters: "SEMPERIT (S) TWIN OX-PB ISO 3821 (EN 559) PN 2 MPa (20 bar) ID x OD / ID x OD -30°C YYYY MADE IN EU //////".

Technical details

Article number Internal-Ø Wall width External-Ø Work. pressure (max.) Number of inserts Bending radius (min.) Weight approx. Coil length (max.)
Oxygen [mm] PB [mm] Oxygen [mm] PB [mm] mm bar mm kg/m m
68344 06066.
68344 06096.
68344 08088.
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