Seamless Pipe Handbook
Stainless Steel Pipe,stainless Steel Seamless Pipe
My company couldn’t see all the fuss. We had been hired by Bechtel as a subcontractor for the ill-fated Goro project to refine nickel ore in New Caledonia. Bechtel wanted us to match its pipe specifications. To us, this was just another symptom of a bloated project. We used to joke that Bechtel had two engineers for toilets: one for the men’s room and one for the women’s room. Looking back, Bechtel’s approach made sense: get the Stainless steel pipe specifications right or live with a project fraught with headaches — never mind other minor issues, i.e., safety, reliability and profitability.
The first decision in establishing a pipe standard is choosing whether it will be based on function or condition. A function-based specification would be something such as a sewer pipe or vent duct. A condition-based specification would discriminate between sewer pipe for corrosive versus sanitary service. Usually, a condition-based specification is best.
Collecting information is the next step. Pipe specifications often are presented in tables kept in massive volumes. What’s missing is supporting information explaining the basis for decisions like the choice of type 316 stainless steel over type 304L, or selection of Inconel 601 instead of Inconel 600. This omission in company records almost justifies the reluctance I’ve witnessed to challenge pipe specifications.
Once information is collected, you should budget time for careful analysis by a consultant. The idea is to look for discrepancies between the pipe specifications and for areas of improvement. For example, Trevor Kletz, in his book “Process Plants: A Handbook for Inherently Safer Design,” suggests eplacing fiber gaskets with spiral-wound gaskets because their leak rate is lower.
With the analysis complete, it’s time for a meeting. Bring together maintenance staff, project engineers, vendors and contractors to pencil in the details of the new pipe specifications. Leave detailed discussion of any contentious points to follow-up meetings. Rely on empirical data!
Seamless Pipe Handbook - Bookshelf
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NOT FOR RESALE 06.05
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