Saiccor Mill’s 12,5/25/12,5ton overhead travelling crane underfactory load test before delivery.

Condra is to manufacture a second maintenance crane for Sappi’s Saiccor Mill, at Umkomaas on the KwaZulu-Natal south coast. Ordered for turbine maintenance duty, the 25-tonner will join a 12,5/25/12,5ton overhead travelling crane manufactured by Condra last year for one of the mill’s dryer lines, and commissioned in March.

Upgrade programme

Both cranes are part of Sappi’s 7,7-billion rand expansion and upgrade programme to position Saiccor among the world’s leaders in dissolving pulp production. Dissolving pulp is a key input in the textile industry, in pharmaceuticals and in food processing.

The latest crane will be similar to its predecessor. Both feature identical doublegirder, 25-metre span frames, and differ only in the number of hoists: one on the new crane and three on the first.Load lifts on both cranes are failsafe, with secondary emergency brakes on the hoists’ rope drums backing up standard brakes on the electric motors.

Factory shot of the main hoist on the 12,5/25/12,5ton overhead travelling crane. Note stainless steel handrails and fiberglass grating.

Corrosion-resistant materials

As before, Condra will use corrosion-resistant materials to manufacture specific components, and apply a high-spec coating to girders, end-carriages and the hoist itself. This will protect the crane for operation in a highly corrosive environment. Handrails will be of stainless steel, with platforms and walkways made from fiberglass grating instead of ordinary steel tread plate.

On the electrical side, Condra will fit armoured power cables and insulate all stainless steel motor and electrical panels to IP65 standard.

Easy maintenance

Commenting on the order, a Condra spokesman said that the design of both cranes will facilitate simple maintenance by authorised agent, Natal Cranes. “Our South Coast partner has spare parts holdings more than sufficient to ensure fastest possible repair and maximum machine uptime. Overall lifetime cost will be the lowest possible.

“We have a third crane – a single-girder machine – that has been working at Saiccor Mill for forty years, so Natal Cranes already has a good working relationship with the staff at Saiccor, and long experience of the operating environment there. We are ready to ensure maximum machine uptime for the new double-girder installations,” the spokesman concludes.

Saiccor Mill’s second Condra crane is scheduled for delivery later this year to coincide with a planned shutdown for plant maintenance.

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