Air Hose Guide: Compressed Air Hose Selection and Sizing

Compressed air hoses are rated by working pressure (commonly 1.5, 2, 2.5 or 3 MPa) and standard (ISO 2398). ## Key selection factors 1. **Working pressure** — match to your compressor discharge pressure (typically 0.7-1.3 MPa, with 2-3 MPa hoses for high-pressure systems). 2. **Inner diameter** — 1/4" for light tools, 3/8" for general workshop, 1/2" and up for high-flow applications. 3. **Tube material** — oil-resistant NBR for compressors with oil lubrication; food-grade for packaging; EPDM for oil-free air. 4. **Cover** — abrasion- and ozone-resistant for outdoor / job-site use. ## Common air hose standards - **ISO 2398** — rubber air hose (general) - **ISO 2398 20 bar** — high-pressure air hose - **ISO 2398 25 bar** — heavy-duty air hose - **ISO 2398 30 bar** — very high-pressure air hose Order in 100 m rolls for wholesale pricing.