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Derek Paterson has joined Becht as Operations Manager of the newly formed Dimensional Control department. The department is designed to complement the services offered by the existing Laser Scan division however will stand as its own entity within Becht. Services will include any project that requires a high degree of accuracy in its measurements. ...Projects the department has completed with Becht since formation include: New and existing pipe verification, subsea template verification, fabricated spool QC, piping construction isometric development, flow measurement nozzle positioning and alignment. Derek has been involved in Dimensional Control (DC) services since 1997. Raised in Aberdeen, Scotland, Derek arrived in America in 2003 as lead DC surveyor on the BP Holstein project. In 2009 Derek established his own company which lead to a partnership with a major service company in 2011. Since then Derek has performed the role as DC Operations Manager. Derek is based in League City Texas and has a family of 2 boys (11&12) and a girl (3). He says there is not much time for hobbies due to work and children’s activities. However, he does try and squeeze in a round of golf and visit to the driving range when time permits and enjoys a beer and a game of corn hole with his neighbors to relax in the evenings. He attended Aberdeen College in Aberdeen, Scotland and holds a Mechanical Engineering degree. More

Pipe Fabrication Dimensional Errors -- I Can't See You!!!

I_cant_see_you_Becht_dimensional_control Dimensional Errors? I Can't See You
Can a level, square and tape measure really measure up to today’s quality standards on complex spools? I was watching my baby girl cover her eyes as she had done something naughty. Doing this gave her the feeling that if she couldn’t see her mother or myself then she would not get into trouble. Despite her feeling of invisibility, she still ended up getting into trouble and having to apologize for what she had done. It’s funny as this is sometimes how the Chemical, Oil and Gas industry acts when it comes to assigning appropriate project dimensional quality control for pipe spools. Green field or brown field (based on a laser scan) projects are typically designed on a specialist CAD platform which enables the designer to design to levels where machine shops would be the only way to match the design model tolerances. This way of designing can provide huge levels...
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Dimensional Control - Post Fabrication Pipe Spool QC Surveys

Dimensional Control - Post Fabrication Pipe Spool QC Surveys
With the advancements in dimensional technology, obtaining accurate measurements at the worksite has become common practice for most owners and engineering companies. New and replacement piping is being designed from behind desks without the designer visiting the worksite. This means there is no need for string lines, tape measures, or auto levels to obtain measurements or the need for notes on drawings stating “field to verify”. Despite these advancements, when it comes to the install of piping, it is still like playing Russian roulette on whether the pipe spools will fit or not. Failure rates are reported between 17% - 38% on spools inspected with these results being in the 70% range if the acceptance criteria was held strictly to industry specification. Failure stats are based on: Cause of Rejection Typical Value Industry Specification Dimensional Error +/- 1/2” 1/8” Bolt Hole Rotation 1/8” 1/8” Flange Face Deviance 1/8” 1/32” Wrong Flange...
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