Buy Welding Hose Online in Australia
Welding Hose Selection — Quick Reference (AS 1335)
Oxy / acetylene welding hose — Grade T (Type 1) + Grade R (Type 2) for gas welding + cutting. AS 1335 governs hose specification. Workshop + production oxy-acet + brazing + flame cutting. Red = acetylene; Blue = oxygen.
| Welding Hose Type | Best For |
|---|---|
| Twin Red/Blue (Oxy/Acet) | Workshop standard oxy/acet |
| Grade T (Type 1) | Acetylene + LPG service |
| Grade R (Type 2) | Oxygen service |
| 5mm (1/4") Workshop | Standard workshop |
| 10mm (3/8") Heavy | Heavy cutting + production |
| Standard Lengths (10/20/30m) | Workshop + production |
| Flashback Arrestor Required | Mandatory safety equipment |
| Fitting Match (G3/8 RH/LH) | Standard oxy/acet fittings |
Critical: AS 1335 + AS 4839 fittings + AS 4267 flashback arrestor compliance. Inspect for CRACKS + leaks regularly. Pressure-test annually. REPLACE damaged immediately. Brands: Bossweld, Dixon. Companion: welding safety, welding accessories, oxy/acet hose reels, welding.
Welding Hose for Australian Oxy-Acetylene and Oxy-LPG Bays
Welding hose carries oxygen and fuel gas (acetylene or LPG) from regulators to the welding torch — engineered specifically for the pressure, gas compatibility, and safety standards welding gas service requires. Different from general industrial hose, welding hose has specific construction, colour coding, and pressure ratings that make the safety-critical gas supply work reliably. For Australian welders, fabricators, and trade users running oxy welding and cutting work, the right welding hose matched to the gas service is essential. AIMS Industrial supplies welding hose for trade and industrial welding bays.
The welding hose types we stock
- Oxy-acetylene twin hose — paired blue (oxygen) and red/maroon (acetylene) hose in joined twin-line construction
- Oxy-LPG twin hose — paired blue and red/maroon hose with LPG-rated inner liner
- Single-line oxy hose (blue) — for installations where single-hose flexibility is needed
- Single-line acetylene hose (red/maroon) — for matching single-hose installations
- Heavy-duty welding hose — reinforced construction for cutting and demanding applications
- Hose end fittings and connectors — for terminating welding hose to standard fittings
Standard hose sizes
- 5mm (3/16 inch) ID — small flow applications, light brazing
- 6mm (1/4 inch) ID — the everyday workshop standard for general welding and cutting
- 8mm (5/16 inch) ID — higher flow for heavier cutting work
- 10mm (3/8 inch) ID — heavy industrial cutting applications
Match hose ID to the torch flow rate. Undersized hose restricts gas flow at the torch tip and limits cutting capacity; oversized hose works but adds bulk. For general workshop oxy-acetylene cutting, 6mm hose covers most work; for heavy plate cutting or sustained production, 8mm provides better flow.
Why welding hose is colour-coded
The standard colour coding in Australia — blue for oxygen, red or maroon for fuel gas — provides immediate visual identification of which hose carries which gas (it's why our own Dixon twin hose is sold simply as "Blue/Red"). Some overseas suppliers use green for oxygen instead — if hose has come from a non-standard source, check markings rather than relying on colour alone. The matching left-hand thread on fuel fittings and right-hand thread on oxygen fittings also prevent cross-connection — but hose colour is the primary visual safety check, so don't substitute non-standard colours.
Pressure rating
Welding hose is typically rated to 20 bar (300 PSI) working pressure — well above typical regulator output pressures (5-10 bar). The hose construction includes:
- Inner rubber liner compatible with the specific gas (oxygen-clean for blue hose, hydrocarbon-resistant for red hose)
- Reinforcement layers (typically textile braid) for pressure containment
- Outer rubber jacket for abrasion and weather resistance
Where welding hose earns its place
- Oxy-acetylene welding bays — connecting cylinder regulators to welding torches
- Oxy-LPG cutting and brazing — alternative gas combinations for cutting and heating
- Mobile welding setups — flexible hose for portable welding rigs
- Sustained production cutting — heavy-duty hose for production cutting operations
Hose inspection and replacement
Welding hose deteriorates with age, UV exposure, and physical damage. Inspect at every use:
- Outer jacket — check for cracks, abrasion, and discolouration
- End fittings — check for damage, leaks, and proper retention
- Hose flexibility — replace stiff or hardened hose
- Smell of gas near connections — soapy water test confirms leak point; replace immediately if leaks are found
Damaged welding hose is a serious safety hazard — leaking oxygen accelerates combustion of nearby ignition sources; leaking acetylene or LPG is highly flammable in air. Replace hose at the first sign of damage rather than continuing in service.
Brands stocked at AIMS
Welding hose is stocked from Bossweld and Dixon, both compliant with AS 1335 (the Australian welding hose standard). For specific brand requirements or specialty hose constructions, contact our team for current options.
Companion ranges at AIMS
Welding hose sits alongside our broader welding gas equipment range — see welding regulators, oxy-acetylene hose reels, oxy-LPG hose reels, and welding cables and accessories for the related products.
Need help speccing welding hose for oxy-acetylene or oxy-LPG installations? contact our team — we'll match hose size, gas type, and length to your bay.
People Also Ask — Welding Hose
Q: Are welding hose, fittings, and flashback arrestors covered by different Australian Standards?
Yes — three separate standards apply across the gas welding safety chain: AS 1335 covers the hose itself (Grade T for acetylene/LPG, Grade R for oxygen), AS 4839 covers the fittings, and AS 4267 covers flashback arrestors. All three need to be compliant together for a safe oxy-fuel setup.
Q: Why is welding hose colour-coded?
Blue is used for oxygen hose and red or maroon for fuel gas (acetylene or LPG) in Australia — this gives immediate visual identification of which hose carries which gas. Matching left-hand thread fittings on fuel hose and right-hand thread on oxygen provide a secondary cross-connection check, but hose colour is the primary safety check and shouldn't be substituted with non-standard colours (some overseas suppliers use green for oxygen instead).
Q: What size welding hose do I need?
6mm (1/4 inch) ID is the everyday workshop standard and covers most general welding and cutting work. 5mm suits small-flow applications like light brazing; 8mm gives higher flow for heavier cutting; 10mm is for heavy industrial cutting applications. Match hose ID to the torch's flow rate — undersized hose restricts flow at the tip, oversized hose just adds bulk.
Q: What pressure is welding hose rated to?
Welding hose is typically rated to around 20 bar (300 PSI) working pressure — well above typical regulator output pressures of 5-10 bar. Construction includes a gas-compatible inner rubber liner (oxygen-clean for blue hose, hydrocarbon-resistant for red), textile braid reinforcement for pressure containment, and an outer rubber jacket for abrasion and weather resistance.
Q: When should I replace welding hose?
Replace at the first sign of damage — cracks, abrasion or discolouration on the outer jacket, damaged or leaking end fittings, or hose that's gone stiff or hardened. If you smell gas near a connection, run a soapy-water leak test and replace immediately if a leak is found. Damaged hose is a serious safety hazard since a leaking oxygen line accelerates combustion of nearby ignition sources, and leaking acetylene or LPG is highly flammable in air.
Q: Is flashback arrestor equipment required with welding hose?
Yes — flashback arrestors are mandatory safety equipment on oxy-acetylene and oxy-LPG setups, and their compliance falls under AS 4267. They're listed alongside AS 1335 (hose) and AS 4839 (fittings) as part of the safety-critical equipment chain for gas welding and cutting.