APPLICATION TECHNOLOGY RotaBolts for live pipeline intervention RotaBolt measurement technology is now being used by
GL Noble Denton on all its live onshore pipeline intervention systems, which have been developed to allow operators to maintain gas and oil flows during major pipeline work.
R otaBolt® fasteners up to M64 size are being fitted on the company’s
‘grouted tees’ originally developed for intervention work on gas transmission pipelines in the National Grid, but now being used further afield in Brazil, Norway and Kazakhstan.
Traditionally, when pipeline flows had to be either diverted or repaired, a
welded tee connection was used to make the intervention, causing lengthy and costly interruptions to production. The grouted tee system was developed as a safe and quick method of intervention for high and low pressure pipelines of varying diameters. “We have switched to using RotaBolts because they are giving us the operational assurance we are looking for,” commented Anthony Wood, senior consultant for Asset Management at GL Noble Denton. “They are simple to install, easy to monitor and give us a highly accurate measurement of tension across the joint. Feedback from everyone has been very positive.” Each grouted tee piece is custom manufactured to the appropriate size and is made up of two half-shells which are then
RotaBolted around the host pipe. A special rubber seal is installed and retained in position by a steel containment ring inside the half shell within the tee piece. Opposite the branch in the other half shell, spreader plates are located to allow seal compression during the tightening process.
Once the half shells have been clamped around the host pipe and the RotaBolts tightened to the predesigned load, the gaps between the ends of the half shells and the host pipe are filled with rapid-setting epoxy putty as a seal. An epoxy grout is then injected to fill the space between the inside of the tee piece and the host pipe. This adheres to both
surfaces to keep the tee securely in place and also transfers the load from the main pipe to the newly-installed outer shell. Solutions using this technique have also been developed for installing multiple branch tees of similar or different sizes, and for
diver-installed use of the technology subsea. The grouted tee is suitable for operations with numerous pipeline fluids and gases in the temperature range –50°C to +125°C, and can be manufactured to suit a host pipe diameter from 2 to 56 inches.
Installing fasteners during the stamping process PennEngineering highlights that its PEMSERTER® In-Die Fastener Feeding System is uniquely engineered
to install self-clinching nuts, studs, and standoffs in assemblies during the stamping process. W
orking in tandem with a stamping press (and properly tooled die) to feed and install fasteners, the portable PEMSERTER®
eliminates secondary operations typically required for fastener insertions. PennEngineering points out that this means users can realise increased
assembly-line productivity, quality, and savings as two operations (stamping and fastener installation) can be performed simultaneously in the die. The PEMSERTER In-Die Fastener Feeding System is virtually “plug and play” by utilising multi-pin twist lock connectors to interface with the die and stamping press. The system can be configured for multiple or single insertions, generally matching the rate of the stamping press. Operators are guided by a touch-screen (for set-up and operation) and online library of fault/help screens. Removable tooling can handle complex workpieces and offers considerable adaptability capable of reaching into areas generally considered inaccessible. Customised tooling can also be engineered to meet particular application needs. “The In-Die Fastener Feeding System consists of die tooling, fastener-feeding system, and die-sensing system. Customers are fully supported from die design through installation and in-house training.”
116 Fastener + Fixing Magazine • Issue 72 November 2011 In-Die Fastener Feeding System
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