Product category:
Cranes, hoists, winches, chains and ancillaries
News Release from: Street Crane | Subject: Cranes and galvanising
Edited by the Manufacturingtalk Editorial
Team on 30 August 2007
Cranes to improve galvanised products
throughput
Two galvanising companies have ordered cranes to to increase crane lifting capability and improve material throughput in factories in the UK and overseas.
The Street Crane Company has won orders, having a combined value of over GBP 300,000, from two galvanisers The orders underpin Street's expertise in the supply of electric overhead travelling cranes (EOTC's) to this key metals treatment market
This article was originally published on Manufacturingtalk on 14 Mar 2008 at 8.00am (UK)
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Wedge Galvanizing has purchased two special 10 tonne double girder cranes for its Worksop, UK plant.
Dorman Long Engineering has ordered three double girder overhead cranes and two semi-Goliath travelling cranes for its new Nigerian galvanising operation.
Both projects will be delivered before the year.
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Precision crane handles 120 die transfers/week
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At Worksop, Wedge operates the longest galvanising bath in Europe.
It is there that company is modernising crane lifting capability and improving material throughput.
The double girder cranes each have hoists of ten tonnes safe working load and will be used in the pre-treatment bay.
The bay carries out sequential de-greasing, rinsing and fluxing of components and large structures in preparation for the hot-dip galvanising process.
Commenting on the particular technical requirements in galvanising operations Street Crane's sales manager, Gus Zona, explained, "Overhead cranes are crucial to the galvanising process.
They need to withstand continuous heavy usage in a demanding environment and yet provide flexibility.
Hoist mechanisms are therefore rated heavy duty M6/M7".
He explained: "During preparation, smaller building components mounted on jigs, or large structural steel elements, supported by a beam, are chemically treated by dipping prior to galvanising.
To achieve the required results, load lowering and raising speeds need to be finely controlled to ensure that the steel is exposed for the correct time and excess chemicals can be drained before moving to the next process.
Appropriately rated motors have been installed to meet these differing speed demands." Street Crane has provided overhead cranes with two-speed operation, using VX series open barrel wire-rope hoists.
These hoists contribute to safety and efficiency by providing a truly vertical lift.
Although modern extraction systems have dramatically improved working conditions in galvanising plants, the cranes have special protection against the corrosive environment.
Crane controls are housed in IP55 environmentally sealed enclosures, electrical wiring is in non-PVC sheathed cable and brake seal materials have been selected to withstand the adverse site conditions.
At Worksop, pendulum crane control has been selected, but provision is included for the installation of radio control in the future.
The two new overhead cranes join two existing Street units in the pre-treatment workshops.
* Nigeria - Dorman Long Engineering is the largest fabricator of process equipment, pressure vessels and steelwork in Nigeria and principal supplier to the oil and gas sector and construction industry.
Their order is for three overhead gantry cranes, each of five tonnes safe working load and two semi-goliath cranes, each with twin hoists of five tonnes safe working load.
These are also engineered for demanding and continuous use in a hot and dusty environment.
They are destined for new galvanising plant, which will have a capacity of 50,000 tonnes/year.
This is the first major hot-dip galvanising plant in Nigeria.
It is being built to support an initiative by the Nigerian government to develop local engineering capacity for the energy and construction industries.
The galvanising plant is just one part of a major expansion of Dorman Long's Nigerian operations.
Michael Hamilton of Dorman Long Engineering said: "Street was one of three companies tendering for the business.
We were impressed that they offered cranes specially engineered to meet our needs and appropriate to the process environment, rather than standard cranes that would not have suited our process or operating conditions.
For production flexibility, the cranes will operate in pairs or for lighter loads will be used singly.
Street Crane will supply the designs and the electro-mechanical components from the UK.
The heavy structural elements will be fabricated in Nigeria by Dorman Long Engineering to Street's specifications.
In addition to making the Street Crane package more competitive, in-country fabrication of the crane steelwork benefits the Nigerian economy by saving foreign currency and creating more skilled work locally.
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