Can anyone supply me with an actual code reference (or relevant code interpretation) to a permanently attached mechanical hot tap fitting? B31.8 Section 849.6 "Service Line Connections to Mains" makes references to: b)- using a service line clamp or saddle, and c)- using compression fittings...
I am working on a project where double block & bleed isolation is required to change out a 30" leaking & passing ESD Valve. We are investigating 30" x 30" mechanical hot tap fitting (s) hot tapping, & insertion of line stop(s). We are looking to achieve isolation by means of either two...
Just one other reminder - don't forget to assure that the interior welds at your orifice flanges are ground smooth. this is normally called out by a note on the piping isometric.
I would not fotget the extremly high ex-pat charge rates. On the island of Trinidad I find it to be a minimum double of stateside comparable costs. As all these types of projects normally involve heavy ex-pat involvement this cost should be looked at.
Questions - What type of pressure letdown valve do you have? What size & schedule piping upstream & downstream? The reason for the questions that another issue exists - one of internal errosion due to extreme pressure drop & relative increase in velocity. Has this been considered in your case?
Just a general comment - SO Flanges, although common in the past - are a maintenance departments nightmare - during the lifespan of a piping system (20 years or so) wall thickness checks & weld joint integrity checks are routinely performed on all systems - the S.O. Flange does not allow testing...
Interesting - looks by the pictures that the bearings on the rollers are completly exposed. This design looks like a high maintenance item with a limited life span. I'll give it 2 or 3 years until the wheel assemblies are corroded & frozen in place & the whole spring is scraping across the...
An hour figure of 8 - 10 hours per iso is what I use (this is a number for "real isos" not the iso gen type whick are so chopped up), + checking 20-25%(2 - 2.5 hours) + corrections 6-8%(.5 hours). Big Inch's number of 15 hours is real close to what I use
I have experience in the Bentley Software - It is a definite advantage in relation to a design tool, but don't forget that on top of program costs there is training, + set up to your company standards (because this is a "spec driven program all piping specs must be "loaded" onto your system...
Your thread mentions SS material, if so what material, size & schedule pipe are you using? What is the service? do you have an existing option for flanges in the piping material specification? Generally Inspection & maintenance groups shy away from SO Flgs for the hidden internal weld required...
Gentlemen - we are guiding our client on the installation of 3 freeze plugs (1 - 30" & 2 - 24")on an existing (25+ year) offshore platform. I am looking for technical data / experience in relation to metalurgical dangers (during application & post application) which could occur during the...
Gentlemen -just a quick safety note - Most if not all measuring utilizing devices like these is performed in operational facilities. Don't forget that "hot work" permits are required before even entering to start work.ALL sources of ignition must be cleared before useage.
Excuse me for my simplified approach but sometimes in cases like this a redesign of the existing vortex breaker could suffice - eliminating the existing vessel vortex breaker & installing an loose mount internal vortex breaker mounted at the existing 6" outlet flange as a "bolt in" item. This...
I have been assigned to put together a piping class on Offshore Platform Piping Design - After 39 years in the petro chem industry I am looking for guidance in this new to me specialized field. Any input will be greatly appreciated
