Chiyoda Explosion-Proof Cranes
MHE-Demag Malaysia plant successfully produced and load-tested cranes in compliance with stringent requirements
The Chiyoda 110/20 t overhead travelling crane was one of nine explosion-proof cranes built by MHE-Demag Malaysia. Designed in accordance with European Materials Handling Federation (FEM) standards and in cooperation with MHE-Demag’s regional design department in Singapore, the cranes were fabricated under the strict control of external inspectors in compliance with ISO standards and quality control procedures.
Each crane was load-tested in the Malaysian plant. Due to space constraints, the plant was handling 138t more weight than its intended capacity for the tests. To address the challenge, special support legs had to be designed, built and installed. Steel plates had to be laid on the soft ground to reduce the pressure on the soil thus preventing the legs from sinking and causing the cranes to collapse during the load tests.
Due to the restricted lifting height, a special spreader and a load-supporting frame had to be designed and built for which short slings and huge shackles had to be purchased. The 138t weight comprised various sizes of steel plates, the loading frame and the spreader.
All items had to be weighed first by an authorised offshore company using registered and Lloyd-certified weighing equipment, and the weighing procedure was witnessed by a third party, the consultant and the client.
The initial plan was to progressively produce, test and deliver one crane at a time. However, upon the client’s request, three cranes were delivered at the same time instead. After the load tests were successfully carried out for each crane, they were stored on MHE-Demag Malaysia’s premises. Only after the third crane was completed were all three packed and made seaworthy before being delivered in one consignment to West Port in Klang. Through the tests, MHE-Demag ensured the equipment met the stringent requirements of our client, Chiyoda Corporation.
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