January 2021

Extruded vs Fabricated Fittings – Hot Tap and Line Stopping

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1. Introduction Pipe Split-tees are inevitable components required for hot tapping or line-stopping operations. These are full-encirclement fittings with two broad areas of application as follows: This document discusses split-tees which are intended for onshore hot tapping or line stopping operations that involve welding of two halves of a split-tee. Their manufacturing processes are broadly classified as extrusion and fabrication. Split-tees manufactured via both processes are in use in the industry and are claimed to meet international and local regulatory requirements related to strength, durability and performance. This paper identifies in detail the engineering and cost consideration of both types …

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Pipeline Intervention Data Sheets – A Closer Look

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1. Introduction There are various definitions of a data sheet and even more opinions on the contents of a datasheet. This subject, however, has never translated well into the pipeline intervention arena because the dreaded datasheet seems to invoke a mixture of trepidation and downright disdain. The goal of this article is to provide an insight into the various components contained in a datasheet to show the importance of some of these questions.  Our focus will be only on the services (hot tapping & linestop) and not the engineering data we collect when designing or manufacturing a hot tap or …

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Subsea Hot Tapping and Line Stopping

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