Fabrication, installation, inspection, testing and construction considerations for piping systems.
Introduction: The word ‘Isometric’ has its origins in Greek which is the case with many English words. It is derived from Greek word ‘Isometros’, of equal measure (the objects measured using a fixed unit). It is one of the most important outputs, if not the most important output of overall Piping effort. Isometric is a…
My last few projects have been low budget, no survey team, minimum field support, and no one available to assist in field data gathering. Sometimes you have good drawings of the existing units, but often you need to sketch the whole thing. So, here are a few hints on setting up your sketch and establishing a baseline…
When I’m out at multiple sites, sometimes I forget which picture goes with each site. This app is called Theodolite. The more information that you can incorporate into your pictures and sketches, the more confident and accurate you design will be.
To add or modify piping that is in the field, we need to verify what we are working with first. Before going to the field, gather all existing drawings, photos, and flow sheets of the area you are working on. This might help out develop sketches in advance to verify in the field.
Sometimes, mostly never, things do not get installed in the field as square as they are on our models and drawings. So we either need to locate these things for future additions
Locating nozzles on existing tanks and cylindrical vessels The term “strapping” is the term used to locating nozzles and other item on a tank or cylindrical vessel.
Have you ever been in the field and had a pipe, object, or point that is just out of reach. I’ve had that problem also.
My last few projects have been low budget, no survey team, minimum field support, and no one available to assist in field data gathering. Sometimes you have good drawings of the existing units, but often you need to sketch the whole thing.
The following statement was made in a communication about welding two fittings directly to each other. This situation also applies to a fitting welded to a weld-neck flange or two weld-neck flanges welded together. “Fitting to fitting welding is not permissible; a pipe shall be (placed) between fittings.”
The goal of all projects is to do as much welding as is possible in the controlled environment of a fabrication shop in order to minimize the costlier field welding, and while it would be nice to be able to fabricate whole piping systems and ship them to site in one piece, this is of…
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