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Thanks Guys. Yes, there is no proper NDE, no proper weld repair procedure. it is a production quantity for small pumps from a oversea supplier. The supplier didn't advise us there is a failure and weld repair. it is really a wild world. I feel really embarrassed about this order. Past: Oil &...

Thanks ironic metallurgist. You are right, I believe it is a porosity area caused by poor casting design. I believe they did the hydro as they provided the photos and it is 1st order which also make no sense for them to skip ruling out bad parts. They didn't do NDE after the repair. We are...

we have received a pump casing casting from a foundry. it seems they did some weld repair on it. The foundry did the hydro-test (1000PSI, 15mins) and it passed. After we received the part and we redo the test after a few days. It leaks around the weld repair. What do you guys thinks. why it can...

I was working with ASME B31.3 for process piping before, I am just wondering, for high pressure piping (~15,000 psi) used for shale oil fracking, what industry code is used? Thanks. Past: Oil & Gas industry in Canada. Present: Desalination pump manufacturer in the US

For VFD driven water pumps, if the pumps will operate in different speeds, when the shop tests (like vibration) are requested, does the pump supplier need to do the test at different speed? Or just at the rated rpm? I tried to find some reference but didn't find anything helpful in HI standard...

On many website, they list ASTM A995 Gr. 6A as an equivalent of Zeron or even as Zeron. But when I check the chemical composition, it seems they are not exactly same. ASTM A995 Gr. 6A C-0.03%max, Mn-1.0%max, Si-1.0%.max, S-0.025%max, (0.01% per Rolled Alloys Zeron 100) P-0.030%max...

Update: Quit after two months as I found another job. but everyone else seems still there. Past: Oil & Gas industry in Canada. Present: desalination pump manufacturer in the US

Self Venting vs Self priming, are they same concept? When you look at a cross section of a centrifugal pump, how to determine if it is Self Venting / Self priming? Thanks.

try to post the pic again

Please see the pics. they are multistage horizontal centifigual pumps with different diamter and length. Currently, the pump is fasten to the motor by an adapter (motor is permanant installed on ground) but the discharge end of the pump are only supported by floor jacks with rollers. I want...

I am working with a local water pump company I would like to implement the vibration test for our pumps. As our pumps are multistage centrifugal pumps with different length and support stands(based on stages), currently the pumps are performance tested when they are only fasten to the motor...

1gibson what do you mean, I was thinking API 610 specifies that the connection on the pump casing shall be flanged except in/out seal gland. Oil & Gas industry in Canada.

Per my past experiences, it is normal practice to use threaded connection for seal flush plans in API pumps as per API 610 section 6.4.3.1, it clearly specifies that all auxiliary connection to pressure casing except the SEAL Gland shall be flange connection my question is why seal gland...

Per my past experiences, it is normal practice to use threaded connection for seal flush plans in API pumps as per API 610 section 6.4.3.1, it clearly specifies that all auxiliary connection to pressure casing except the SEAL Gland shall be flange connection my question is why seal gland...

thank you guys. very helpful!!! I am working with a pump company and they have a software to estimate the rpm (by the tip speed) by the pump head. It seems they may have some tested data for a better relationship between tip speed and pump head. Oil & Gas industry in Canada.

Clearly the pump head is relevant with impeller tip speed, I am just wondering if there is a formular to estimate pump head by tip speed? Thanks Oil & Gas industry in Canada.

Some of the pumps come with only 1 accelerometer and some come with 2 in 90o degree. can one accelerometer monitor two directions vibration on bearing house? can it be used to determine Velocity and displacement? thanks Oil & Gas industry in Canada.

To LionelHutz (Electrical) I am in the States now. The state which I work in doesn't require employer to pay OT for professional positions.

Thanks all you guys. I have per Diem as it is a field work. Considering the exchange rate, the current salary for 60 hours (not 72) is acceptable. During the interview, they told me there will be some unpaid OT. From the job offer, I didn't expect anything more than 10 hours/day except some...

To KENAT (Mechanical) That is why I feel isolated. The management just want to create a culture and force everyone work 12 hours. my bottom line is go back home to receive unemployment insurance OR work 10 hours efficiently and happily. How can I make the 10-hours schedule as normal as possible?