Why specify halogen-free for rail?

A fault in an enclosed cabinet or vehicle should not release corrosive, opaque smoke. Halogen-free, flame-retardant tubing limits that, Wellele DRS and FR 2:1 meet rail and transit specs.

Is flame retardant the same as halogen-free?

No, flame retardant slows burning, halogen-free controls smoke and corrosion. You often need both; check the standard on the datasheet.

Which standards apply to rail tubing?

Look for UL 224, low-smoke zero-halogen (LSZH) and the rail operator's fire-smoke-toxicity rule. Wellele lists these on the product page.

Flame Retardant & Halogen-Free Tubing for Rail

Halogen-free flame-retardant heat-shrink tubing in a rail transit cabin, producing low smoke and no toxic halogen on fire

In enclosed or passenger spaces, a fire must not spread and must not give off toxic halogen smoke. That is what halogen-free, flame-retardant tubing is for.

What halogen-free means

Halogen-free polyolefin (DRS) and flame-retardant halogen-free (2:1) carry no chlorine/bromine, so they emit low smoke and no halogen acid on burning.

Where it is required

Rail rolling stock, transit, ships and crowded electrical cabinets. Spec it wherever people or expensive equipment share the enclosure.

Standards

These grades are built to references including RoHS and TÜV PAHS; certificates are supplied per batch. See the materials under products by material and ratings under products by performance.

Frequently asked questions

Why halogen-free for rail?

It emits low smoke and no toxic halogen acid in a fire.

Is it flame retardant too?

Yes, the flame-retardant halogen-free grades combine both properties.

What certificate do I get?

RoHS / TÜV PAHS and related certificates per batch on request.