Dow uses tension control fasteners at China plant
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James Walker Rotabolt product story
Edited by the Engineeringtalk editorial team
Apr 15, 2009
Dow Corning is using more than 4,000 Rotabolt tension control fasteners on high-integrity pipework, vessels and large body flanges at its plant in Jiangsu province, China.
The fasteners have been designed-in because of their track record in Dow Corning's flange management control systems at its plant in Barry, south Wales, where they have been used for a number of years.
The fasteners have been selected by Dow Corning based on two main criteria.
First, the company uses Rotabolts to ensure that a minimum bolt tension has been achieved and to monitor loss of the minimum bolt tension throughout the life of the plant.
Second, Dow Corning's requirements on the control of materials were more than met by Rotabolt's own assurance procedures, which see every fastener being 100 per cent load-test calibrated.
More than 10 years ago, Dow Corning began to investigate all the measures that could be taken to increase the reliability of bolted joints as part of its commitment to high-integrity systems.
This resulted in Rotabolt fasteners being fitted on a number of pressure vessels and heat exchangers.
They were also used on some of the high-integrity pipeline flanges.
The company found that another advantage was the tactile tension-monitoring system, which meant that an instant 'finger test' of the Rotacap on each fastener was all that was required to let the engineer know that the correct load was being maintained.
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