ISO3821

2 products

  • PVC LPG Hose PVC Hoses Hoses UK

    PVC LPG Hose

    -10°C to +65°C 20 Bar Flame Resistant
    Regular price From £0.96
    Sale price From £0.96 Regular price
  • Rubber LPG Hose Rubber Hoses Hoses UK

    Rubber LPG Hose

    High Pressure Extreme Flexibility Date Stamped
    Regular price From £2.78
    Sale price From £2.78 Regular price

ISO3821

The ISO3821 collection is crafted to meet the high standards required for welding, cutting, and allied processes. Specifically designed to handle oxygen and fuel gases, these hoses comply with the ISO3821 standard, making them the trusted choice for professional welding and gas applications. Ideal for use in construction, manufacturing, and heavy industry, these hoses offer unmatched reliability, safety, and ease of use.

Made from premium elastomers, the ISO3821 hoses provide superior resistance to wear, abrasion, and environmental factors such as UV rays and ozone exposure. This robust construction ensures that the hoses remain durable and safe, even in harsh and demanding conditions. They’re built to withstand the rigors of daily welding and cutting activities, giving professionals peace of mind that their equipment can keep up with their workload.

Flexibility is essential in welding applications, where operators need to maneuver and position hoses with precision. The ISO3821 hoses are designed to be highly flexible and easy to handle, allowing for efficient movement and positioning, even in confined workspaces. This flexibility does not compromise strength, as the hoses retain structural integrity and remain kink-resistant, helping to ensure uninterrupted gas flow.

Safety is paramount in gas applications, and the ISO3821 collection meets this need with reinforced, multi-layer construction. Each hose is carefully manufactured with layers that resist leaks and prevent gas permeation, providing a safe and controlled flow of gases such as oxygen, acetylene, and propane. This reinforced design also guards against accidental cuts or abrasions, adding an extra layer of security during use.

Engineered for a wide temperature range, the ISO3821 hoses perform reliably in both hot and cold conditions, ensuring consistent delivery of gases even when temperature fluctuates. This resilience makes them a suitable choice for indoor and outdoor applications alike, supporting a variety of settings and environments.

What is ISO 3821?

The international standard for rubber hoses used with gas welding, cutting and allied processes, and for LPG. It covers construction, materials and performance, so a hose carrying it has been benchmarked rather than merely described. Both our rubber and PVC LPG hoses are built to it.

What is in this collection?

Rubber LPG hose in 5mm to 13mm bores, cut from 1 metre to a 100 metre coil, with an oil-resistant synthetic rubber inner layer and date stamping; and PVC LPG hose in 5mm to 13mm, flame resistant, rated 20 bar over -10C to +65C with triple polyester yarn reinforcement.

Rubber or PVC?

Rubber is more flexible and more durable, especially in cold weather where PVC stiffens, and it copes better with repeated coiling and handling. PVC is flame resistant, rated to 20 bar and cost-effective for a static installation. For anything moved or used outdoors in winter, choose rubber.

Why does the date stamp matter?

Because LPG hose degrades with age even when it looks perfectly sound. The date tells you when it was made and therefore when it is due for replacement - commonly five years, but check the appliance manufacturer's requirement. If there is no legible date on your existing hose, replace it now.

Can I use general-purpose hose for gas instead?

No. General-purpose hose has no gas rating, no flame resistance and no certification, and it will not survive contact with LPG. This is not a place to improvise - use hose built and marked to ISO 3821 and replace it on schedule.

What regulator do I need with it?

It depends on your cylinder valve. 21mm butane valve takes a 21mm clip-on at 28mbar; 27mm propane valve takes a 27mm clip-on at 37mbar; a threaded POL propane valve takes a screw-on at 37mbar. All to EN 16129, all with an 8mm nozzle to suit this hose.