Is there a solid way to determine if a vessel is out of service?
There is politicking in management right now as a vessel went over its 10-year internal interval by 34 days and maybe we could consider it out of service for stints like during two, 20-day TARs so we'd "gain" 40 days thus still...
Has anyone been tasked with developing pipe specifications before? I've been asked to implement pipe specifications for our site maintenance and project teams to use. The origin of the request is that there are currently 103 pipe specs that are scattered throughout our P&IDs. This came from...
There was a change in the July, 1 2023 release regarding Miscellaneous Requirements. T-451 "Coarse Grain Materials" is attached, but has been described by our NDE provider as all customers will be required to buy all weld mock-ups for any new and existing weld approvals. This will either cost...
I'm wondering if I can get some advice regarding pump sizing and style to remove an algae/water mixture from ponds/lakes.
Is there a pump style that I'd be able to transport on a trailer that can handle sucking up stringy solids like duckweed/algae and even sticks and be okay?
I was...
Currently, we are evaluating a historic system in the plant due to changes in degradation rates and evidence we're seeing.
Knowledge as of today:
1. Our coolant is 74% Water, 20% Methanol, and 6% Ethylene Glycol.
2. The system is made of A53 Gr. B and A106 Gr. B carbon steel piping.
3...
Today I was asked how we can positively isolate a section of underground 3" schedule 80 PVC pipe from an outfall pond. The isolation is needed to install a new valve/break in the line to connect to the new carbon steel pipe in the basement pump house. They want to change the connection point...
I have a scenario of installing a circumferential clamp on a 12.75" OD pipe. I calculated that the max allowable external pressure is ~45 psi from ASME BPVC VIII UG-27.
The 2 bolts will be torqued to 30 ft lbs. How do I calculate the pressure the clamp will put on the pipe due to it being...
Background: Two 30-year-old, 20", 304L, triple offset, butterfly valves are replaced in October 2021. They are replaced with 20" carbon steel gate valves in preparation for the ten-year internal inspections of stripper reboilers (These valves isolate the reboilers from the stripper column). In...
Hello,
I am quite new to API 571 and identifying DMs. I find it hard to put my finger on one exact damage mechanism when several sound relevant to the case.
Currently, we have just opened a reboiler that we run HCN @80F through the tubes and 50# steam on the shell. This is a vertical...
Hello,
I recently came across our plant's reboiler cleaning procedure as well as our shell-and-tube cleaning procedure. We have various materials from SA-285 to 316SS and have seen historical caustic corrosion in our reboilers... Not BAD, but has pushed us to replace the equipment entirely (60...
Hello,
I have a question of where I can locate in Section 1 and Section 8 of the ASME BPVC code that it is OK to weld a nonpressure retaining attachment to the anchor gussets.
We are adding better grounding to a boiler and a pressure vessel and the contractor has suggested welding a tab to the...
Hello,
I am in the middle of an issue where we ordered a new wellhead that has a 3000# 410 SS flanged connection to the underground piping. Our prior design used 316SS 600# flanged connections. We are now in the midst of fabricating a spool piece to go from 3000# back to the 600#.
What code...
