Dears
ASME SECTION VIII D1 2009, UG-136(d)(4) states " Necessary corrections for differentials in popping pressure between steam and air shall be established by the Manufacturer and applied to the popping point on air."
Is it mandatory to make the CDTP corrections while testing the Steam...
Dears
I need your advice pls
As per API RP 520,(page 48) the temperature correction factor (multiplier) is typically required when the relieving temperature exceeds 250°F. However in Dresser PSVs(Consolidated PSVs)they are referring the operating temperature not relieving temperature. In...
Dears
We would like to test & calibrate our new psvs in RV shop, which is more than 180KM far from our plant. As per code/API, is it acceptable? After calibration, how many kilometer transportation is acceptable(by road)?
Can we have your advice pls
Thanks
Dears
Find attached photograph for the PSV outlet mismatch. Your comments pls.
If the outlet is not matched with outlet piping, what are the issues we may face in future. Also if the inlet flange is not matched what are the issues we may face in future.
Your valuable comments are really...
Dears
We have 3 PSVs in our Boiler and the boiler operating pressure is 40Kg/cm2g. Can you please inform us, at what pressure we need to set each safety valve. As per code how much gap we need to keep on each psv?
Presently it is
1st PSV - 45Kg/cm2g,
2nd PSV - 49Kg/cm2g
3rd PSV - 49Kg/cm2g...
Dear All
As per psv procedure, we must keep the bellows design psv's bonnet vent keep open or piped to a safe location. If we plug the bellows psv bonnet vent, what will happen? How it affects the psv performance?
1. As per code, we should not plug the bellows design psv's bonnet vent, it is...
Dears
As per Saudi Aramco Standard SAES-J-600 States " When gate valves are used as block valves for Pressure safety valves,they shall be installed with the stem horizontal or sloping down away from the relief valve to keep the gate from falling off and blocking the flow.".
What is the logic...
Dears
If we have section 1 Boiler PSVs,even if we calibrate the PSV in the shop, we need to conduct in place test(on line popping test) at site. What is the reason behind this requirement.
Why a section 1 Boiler PSV needs to test at shop & then test at site?
Awaiting your feedback
Thanks
Nasim
Dears
i need your advice for the steam service safety valve tolerance. If the PZV design is section 8 and the service is steam we need to follow Table 2 for the set pressure tolerance or Table 1.
Table 1 – Tolerances for Set Pressures of Pilot/Safety Relief Valves
(In English Units to Conform...
Dears
I need your advice for below query.
We have one Lube oil PSV(Conventional design), which is located in one compressor. PSV set pressure is 11Kg/cm2g and there is 1 atm(stad)g Constant back pressure. While calculating CDTP, is it required to deduct the constant back pressure?
Or CDTP is...
