Recent content by hhmh2004

Is it possible that pumped product can be contaminated due to the minimum flow recycle provided to the centrifugal pump? If yes then how?

Dear All, In one of the job I have to install emission sampling ports on stacks of boilers, furnaces and heaters . I have attached the standard clause with this thread. First of all I need to understand where the sampling ports should be located. Is it 8 Diameters from the Top of the stack or...

Kindly define the word "Pressure Retaining Item" for pressure vessels. What are the pressure retaining items for a typical pressure vessel? Can support clips/rings for demister pad inside a pressure vessel be qualifed as pressure retaining itesms..?? Thanks and Regards..

Hi, I have shifted the water makeup supply from RO Reject to Soft Water. Attached is the analysis of Soft Water. This water is high in concentration of Chlorides and TDS. Chlorides = 1610 wppm TDS = 4882 wppm What will be the effect of this water on galvanized CS tubes? what is the...

I have a closed circuit cooling tower. In this tower water to be cooled comes, passes through the tubes, gets cooled and goes out. These tubes are sprayed by water which is in continuous re circulation i-e water is sprayed on the tubes, gets collected in the basin, pumped again to the spray...

will this require welding of internal attachment inside the vessel for demister pad support? This will require an ASME Re-certification. Is there any other way in which I can avoid the welding inside the Vessel OR ASME re-certification...??? Thanks

Is it possible to install demister pad in an existing vessel which does not have provision (internal attachment) before? What will be the most cost effective way?

I am still waiting for Vendor Replies on issues raised in this thread and will update as soon as possible. Actually the "Big" Oil and Gas Company in Saudi Arabia has very stringent guidelines for Centrifugal Pumps. It has to operate within 60% to 110% of BEP envelope, otherwise it is...

Thanks Mr. Steve Jones for your reply..

Can a material e.g SA-516 GR 70 be specified for both HIC Resistance and NACE applicability at the same time?? if not then which is more stringent HIC Resistance Testing OR NACE Compatibility? Regards,

Thanks to everyone for interest and replies. Really appreciate it.

Thanks Artisi @Bimr I sincerely apologize for any unintentional teaching as pointed out by Artisi. I was only describing the difficulties I am facing in selection of centrifugal type of pumps. Regards

Thanks to all for replying... Bimr, The pump selection that you have provided shows pump is running close to its runout condition OR we can say end of curve operation. Centrifugal Pump operation at runout conditions should be avoided. Same is true for pump operation near shutoff conditions...

In one of the jobs I have to specify a pump for domestic sewage transfer to waste water treatment plant. The Pump Flow is 290 USGPM and Required Head is 230 ft. The pump will take suction from an above ground Sewage Tank. Here in Saudi Arabia, typically centrifugal non clog type impeller pumps...

Thanyou so much Mr. Johnny Pellin....your explanation helped a lot...