@LittleInch well fluid is mainly gas and contains 4% CO2, is regarded as saturated in both water vapors and hydrocarbon vapors. The joints are not electrically insulated and that is why I brought this for discussion.
@SJones There is corrosion inhibition on the upstream of dissimilar flange...
The flange connection between Duplex stainless steel and carbon steel is fitted in hydrocarbon service (well fluid) and flows from Duplex SS to carbon steel. What is the likelihood of corrosion while flowing from DSS to CS and vice versa? The operating pressure is approximately 20 barg, and the...
Hi,
Hope everyone is having a great time.
As we can see that API-574 (Table-6) dictates the structural minimum thickness for carbon and low alloy steel pipes but if the pipe size is more than 24" and MAWT is very low (even below the structural minimum of 24" pipe) then what criteria should be...
Hi All,
Have anyone of you considered to use non-metallic piping for bridles associated with two phase crude oil separators. If considered, what could be pros and cons. Valuable inputs would be appreciated.
Dear All,
What is the criteria for selection of different Flares types (Hot&Cold Flares, and HP&LP Flares) and what is the difference w.r.t. their operations.
Thanks in advance.
Sahmad
Pennpiper,
The plant is located in Middle east and is an upstream oil and gas plant. Built in 80's and still operated by original owner. Certain cases have been reported where valve tags were missing and sometimes valve tag is available but data sheet and P&ID is missing. what guidelines should...
Dear All,
Can you please advise on below queries:
1 - How to positively identify a PRV if the original name plate is missing and the PRV is not traceable for servicing/overhauling".
2 - Some PSV datasheets and P&IDs may not be available and tags are unidentifiable. What is the way forward in...
Dear metengr
There is no access for borescope. pls see attach example for such an installation
https://res.cloudinary.com/engineering-com/raw/upload/v1477977924/tips/Tubes_directly_welded_to_Pipe_header_olq3ue.docx
Dear Experts,
Can anyone guide about the applicable inspection technique for inspecting fin fan cooler tubes that are not open ended and are welded directly to piping header.
Thanks in advance
Sarfraz
API-570 states that whenever pressure testing of in-service piping is required, then it shall be performed in accordance with the requirements of ASME B31.3. Additional consideration are also provided by ASME-PCC-2. No where it is mentioned that test pressure can be reduced, however it can be...
The pressure testing is required after a repair activity and that portion of piping not meeting the minimum required thickness criteria has already been replaced. The remaining portion of piping is corroded with different value of remaining corrosion allowance.
Deal All,
I had discussion with an Inspection Engineer of oil and gas plant and He has raised a query that pressure testing of corroded/old piping shall not be carried out at 150% of design pressure. My point of view is that, as far as, minimum required thickness is still available then...
Dear All,
A Fuel Oil tank has been designed as per API-650 code and it is mentioned in this code that when design metal temperature is below -7°C impact test shall be carried out for all welds for all components. The statement in code is given as:
"9.2.2.2 When the design metal temperature is...
