Dear all,
In one of our plants we have noticed internal preferential corrosion in the CS welds mainly due to wrong filler material used during the welding process. The driver for corrosion mechanism is wet CO2 gas. We are planning to replace the pipework with a suitable weld metallurgy and...
Peers,
Are there any ways to measure nozzle loads (e.g. using load cells, strain gauges etc) on pipework or vessel to compare whether it is exceeding the allowable nozzle loads? From theoretical perspective I understand that we can do stress calc or FEA etc, but looking for some techniques /...
Does the recent version (2019) of ASME VIII Div 1 change the minimum temperature of carbon steel cast valves A216 WCB, WCC from -30deg C to -8deg C. One of the US pressure relief valve supplier is stating that the code has changed so that the body / bonnet material of new valves with a design...
Looking for some guidance on max tube velocity calculation for wet saturated gas in air cooled exchanger. The exchanger is designed as per API 661, but this standard does not provide any guidance on tube velocity limit. TEMA provides rho-v2 to calculate tube side velocity, but it is explicitly...
Do anyone have their experience to share about TEER valves? We've not used or even heard about these valves before. A quick google search showed that these are valves manufactured in China. Are there any global experience to share about this product? We've asked for a Global reference, but...
I know this question was raised few years back by one of the members, but have not been able to find any response from Forum members. I'd like to raise it again to the forum as we are facing similar issues with hammer unions being used in our well flow line design. This is following on from...
Peers,
I'm looking for some advice for non-metallic pipe support packer material which can withstand low temperature. Piping is low temp CS A333Gr6 and will see temp as low as -60C during blowdown. There are some structural contact point which requires to be isolated from low temp pipe...
Peers,
I'm looking for some advice for non-metallic pipe support packer material which can withstand low temperature. Piping is low temp CS A333Gr6 and will see temp as low as -60C during blowdown. There are some structural contact point which requires to be isolated from low temp pipe...
Is ASME VIII Div 2 and 3 designed vessels acceptable in Australia? One of our clients in Australia has raised a request for high stress vessels to be designed to AS 1210. We don't design / fabricate to AS 1210 and hence provided suggestion to design the vessel to ASME VIII codes. We've...
Peers,
As per ASME B31.3 Table 341.3.2 Acceptance criteria for welds, is it important to meet all the acceptable values mentioned in the criteria. For eg. lack of root penetration for Normal and Category M fluid - Girth, Miter groove and branch connection shows B as acceptance criteria...
Looking for a suitable coating system for vessel internal at high pressure and high temperature. Norsok M-501 coating system 3 provides info for Pressure < 7Mpa, Temp < 80deg C. Is there any proven coating system for high pressure 12Mpa, Temp=200C (This is the design condition of the vessel...
This question is to get some clarity on pipeline engineering responsibility within the limits of a gas metering station. In Australia, the design and operation of pipeline in accordance with AS2885. AS2885 has strict regulatory requirements for operations, maintenance and integrity management...
Friends,
We've a scenario in one of our gas plants: A106B 14" piping sch 80, WT 0.75" (no PWHT) is installed for design pressure 15MPa. Normal operating 3.5MPa, max pressure the system will see is 10MPa. As per curve B, the min temp it can go is -10degC without impact test. In winter...
ASME PCC-1 provides comprehensive guidelines on bolt torque values with target bolt stress 50ksi. Does this apply for Stainless steel and DSS flanges as well or just limited to CS flanges? Any useful information is appreciated.
Peers,
Can anyone pls advise on the closed cell elastomer insulation for heat conservation below 120deg C? It is industry practice to use mineral/rock wool, cellular glass for heat conservation, but not really sure about the limitation of elastomeric material as HC insulation on gas process...
I'm looking for some experiential notes on Buckling (Rupture) Pin valves. What are its advantages and disadvantages? Are they reliable mechanism as an alternative to relief valves and rupture discs in oil & gas industry?
Is it a good industry practice to remove and test PRV everytime it lifts in service but satisfactorily reseats following that without leakage? How can one confirm that set pressure has not changed during the PRV lifting? If there are reference reg this in any of the standards, pls update my...
what are the suitable scaffolding material other than wooden planks to use inside a stainless steel vessel in offshore environment? Scaffolding is required for inspecting the vessel. Is Aluminium suitable? Are there any GRP scaffolding material available in the industry? Not using CS to avoid...
