Hard stamping on low pressure fire extinguishers

Hard stamping on low pressure fire extinguishers

It is advisable that all SANS 1475 company owners communicate this information to the Management Representative so that registered fire technicians can make the correct decisions when they service low pressure fire extinguishers (DCP/Water & Foam).

All fire extinguishers marked SABS 810 are still permitted to be in service and are permitted to be serviced. The requirement of “restore to the original manufacturers requirements” still applies.

  • Fire extinguisher cylinders manufactured up to and before 2003 will be marked as per the SABS 810 requirements. Cylinder’s manufactured after 2003 will need to be marked as per the requirements of SANS 1739.
  • Fire extinguisher manufacturers can use their own numbering or lettering system as long as all the requirements for permanent marking are met.
  • The Standard requires that permanent markings be readable. As discussed at international ISO meetings, this becomes a little contentious when a heavy-duty powder coating is applied or if the cylinder has been painted during refurbishment.
  • SABS 810 was so written that markings could be on the body of a cylinder.
  • The initial SANS 1739 lead to contention regarding permanent markings on the body of an extinguisher. The revised SANS 1739:1998 does not allow permanent markings on the cylindrical portion of the cylinder which is under pressure.
  • Cylinders without the required permanent markings as per SANS 1739 are NON-APPROVED and shall be condemned.

Even though par 5.2.8 of SANS 1475-1 does not explicitly list it as a condition to condemn a fire extinguisher it has to have hard stamping as per the requirements of SABS 810 and SANS 1739. The manufacturing of a fire extinguisher is currently controlled by two SANS standard – SANS 1739 – the actual manufacturing of the cylinder and SANS 1910 – putting the bells and whistles onto the cylinder (this is about to change with both standards being incorporated into a new SANS 1910 with SANS 1739 falling away).

SANS 1739 point 12.2 - Markings - sets out the hard stampings that are required on a cylinder as per sub clause 12.2.1 – Type of content marking. Should the marking not be present as per this requirement then the cylinder would not have passed the manufacturing criteria and therefore would NOT have been approved, which in turn means that the cylinder would NOT have been allowed to enter the market (bear in mind that although the fire extinguisher standard sets out its own markings it still has to be in line with the PER).

So, although there may not be a clause directly stating that a cylinder must be marked in a set manner, it goes together with a heap of other manufacturing standard requirements. If not met, the cylinder must be condemned as it does not meet the manufacturing requirements.

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