01 October 2010
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High quality fastener has tension control

With bolt or stud failure regularly identified as the cause of serious problems such as leaks in petrochemical plant, maintaining the correct level of tension in studs has the potential to save money and significantly reduce safety risks.

The EcoStud, which has recently been launched by Sheffield-based fastener manufacturer Arnold Wragg, provides a cost effective answer to the safety risks caused by bolts and studs losing tension in operating conditions. It combats fastener fatigue failures and leaking joints by combining a high quality fastener and an accurate tension controller within a single integral unit.

The EcoStud bolt makes it easy to identify studs that are losing tension and to correct them before a leak starts. The bolt can be used to replace ordinary studs during an outage. As EcoStuds are a direct replacement, only the original size, material and required preload needs to be specified. It is fitted with a stainless steel rotor which is locked when the stud is tight, but becomes free to spin when the stud begins to lose load. A simple fingertip test instantly establishes whether the stud is still tight, simply by checking if the rotor will spin. It is a very quick, accurate test that requires no special tooling, training or expertise.

The EcoStud is another milestone in Arnold Wragg's well-established history of innovation. Paul Brown, Technical Director at Arnold Wragg, commented: "We are very proud to launch our new EcoStud product because it offers a solution to critical bolting for many different industries. Research has proven that the EcoStud offers both great versatility and great reliability – helping to cut the high risks and costs of joint failure."

Paul Gay


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