Overview of AS 4606
AS 4606 is the Australian Standard for underground coal mine conveyor belts. It is the most stringent underground belt standard in use globally β?significantly more demanding than EN ISO 340 (Europe) or MSHA 30 CFR Part 18 (USA). All conveyor belts used in underground coal mines in Australia must comply with AS 4606 and carry certification from an approved Australian testing authority.
Why AS 4606 Is More Stringent
Australia developed its more demanding belt fire standard following a series of coal mine incidents, including the Moura Mine disaster (1994, 11 fatalities). The standard was designed to ensure that even in worst-case scenarios β?belt stalled on running drive pulley, inadequate ventilation β?the belt will self-extinguish before propagating fire through the mine tunnel.
AS 4606 Test Requirements
| Test | AS 4606 Requirement | EN ISO 340 Equivalent |
|---|---|---|
| Drum friction test | Max 7m char length | No char length limit (temperature limit only) |
| Gallery flame test | Self-extinguish within 60 seconds | Self-extinguish within 3 seconds |
| Propane burner test | Self-extinguish within 60 seconds | Not required |
| Electric spark test | Must not ignite from 10,000V arc | Not required |
| Wet performance | Must pass drum test when wet | Not required |
| Anti-static | β?Γ10βΈβ?surface resistivity | β?Γ10βΈβ?/td> |
Approved Testing Authorities in Australia
- SIMTARS (Safety in Mines Testing and Research Station) β?Queensland Government, Redbank QLD
- Vinsi Partners β?Private testing laboratory, NATA accredited
- Testing must be conducted in Australia by NATA-accredited laboratory
- Overseas test certificates (EN ISO 340, MSHA) are NOT accepted as equivalent to AS 4606
Can Chinese Manufacturers Supply AS 4606 Certified Belts?
Yes β?but only if the belt has been physically tested at an Australian NATA-accredited facility (SIMTARS or Vinsi Partners). The belt manufacturer ships belt samples to Australia for testing. If the belt passes, SIMTARS or Vinsi Partners issues an Australian certificate. This certificate must accompany each batch of belt supplied.
β οΈ Procurement Warning for Australian Operations
Some suppliers offer belts with "AS 4606 equivalent" or "tested to AS 4606 methodology" certificates issued by overseas laboratories. These are NOT acceptable for use in Australian underground coal mines. The certificate must be issued by SIMTARS or a NATA-accredited Australian test facility. Verify this before accepting any belt delivery for underground use.
Belt Marking Requirements
AS 4606-certified belts must have the following permanently marked on the belt surface at regular intervals:
- Manufacturer name or trademark
- Belt designation (width, carcass rating, cover grade)
- Certificate number
- Year of manufacture
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