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Dear all, how do you reconcile pic1 with pic2. Pic1 shows that at low flow (minimum flow) the DP across the control valve is high whereas in pic2 low flow is proportional to low DP across the control. can anyone please dispense my confusion over this ? thanks.

How do you determine the delta P across a control valve that is under design and hence hasn't been installed yet for you to measure the DP !

Dear all, Whenever Pump B comes online, pressure on Pump A goes up and trips it. is there anything that can be done to resolve this? both pumps need to be working simultaneously. thanks.

dear all, we have a tank with the following 2 problems: 1. huge gap between bottom plate and the tank foundation 2. nozzle misalignment does anyone have any experience with this?? also what is the tolerance for bottom plate slope as per api code??

Dear all, Our company made an order for thousands of prefabricated pipe spools. The purchase order stipulates that the spools shall meet b31.3 criteria. The fabricator says he can only pressure test the spools for 1 minute as opposed to the requisite time of 10 minutes as per b31.3. Can this...

Hi all, Most of our purchase orders specify that MTC and NDE reports are to be submitted by the supplier. However, most of our suppliers are just content with submitting the MTC citing that the MTC itself mentions the NDE results i.e. ultrasonic satisfactory. So my question is this : is the...

Hi all, So we issued this purchase order for the supply of pipe fittings, namely tees and elbows, made from the same material. Anyways the supplier submitted two separate MTCs for the said material; one MTC for the tees and the another for the elbows, both had different heat numbers however...

So the company placed a purchase order for forged carbon steel flanges (SA-105) this current year of February 2011. Upon reviewing the MTC, I noticed that its date was 2009. I also noticed that the ASME edition mentioned on the MTC was 2007. I was just wondering about the following : 1. Is the...

Hi there, So I was just wondering what is the extent of radiography for process piping and piplines in a sour service environment? I know that B31.3 classifies pipes according to fluid service (i.e. M, D, Normal etc.) but im still vague about the following. 1. Purely gas service process...