Transcription of Discussion Paper for Modifying Pipeline Engineering ...
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Discussion Paper for Modifying Pipeline Engineering ...
1 Discussion Paper for ModifyingPipeline Engineering Standardsfor Sealant Injection Fittingsin Pipeline 10, 1994 Prepared & Illustrated by: Dean ChisholmSealweld Services - Pipeline Valve MaintenanceCalgary, Alberta, CanadaThis Paper is written from the perspective of a professional valve maintenance describes some of the problems experienced while attempting to service Pipeline valvesduring routine maintenance contracts and emergency valve sealing operations atproduction facilities, plants and pipelines in Canada, USA, Russia, South America,Europe, Asia, Africa & the Middle is very dangerous to attempt to remove sealant fittings from valves that are underpressure. Dangerous and defective designs can be safely replaced when pipelines are takenout of service and drained of product and of the problems can be eliminated by incorporating modifications in the engineeringstandards when new valves are ordered or when used valves are OF CONTENTSPART ONE- Function, Purpose & Application of Sealant Injection TWO- Examination of Defective and Non-Standard THREE- Effects of Corrosion on Sealant Fittings and Body Vent FOUR- Destructive Testing Existing Designs of Sealant FIVE- Factors Contributing to Valve Seal SIX Related Studies Attached:- Failure Analysis of Sealant Injection Sour Service Immersion Testing of Seala
1 Discussion Paper for Modifying Pipeline Engineering Standards for Sealant Injection Fittings in Pipeline Valves. August 10, 1994 Prepared & Illustrated by: Dean Chisholm
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