API 676 Compliant Pump with mimimum flowrate 2

[Kaleem1013]

I there a minimum flow rate required for a pump to be API 676 compliant.

We are using a transfer pump of flowrate 0.25 LPH of make Wilden, USA.

This pump will be used to transfer Stadis to a tank containing Jet Fuel.
The pump manufacturer has said that this pump follows the guidelines of API 676, but is not complaint to it. But our end user is insisting on a API 676 compliant pump with a flowrate of 0.24 LPH.

Please suggest.

 

[micalbrch]

Wilden and API 676? I know Wilden as a manufacturer of air-driven diaphragm pumps but API 676 is the standard for rotary positive displacement pumps. An air-driven diaphragm pump cannot comply with that, not a Wilden pump and any other neither. A lobe pump, a gear pump or a progressive cavity pump are rotary positive displacement pumps.

 

[Kaleem1013]

Oops. My mistake.

The make of the pump is Viking Pumps, USA. My question remains the same.

 

[Pumpsonly]

What are the non compliance that the end user is not accepting? API 676 covers a vast variety of rotary PD pump.
There is bound to have some deviation. If your client is concern about the flow rate, he should use a API 675 metering / controlled volume pump. A metering / controlled volume pump allows you to adjust to the exact flow you need and is best for the such low flow rate.

 

[Kaleem1013]

Thanks Pumpsonly.

The client wanted to use a transfer pump (for transferring Stadis from one tank to Jet Fuel in another tank).
They also wanted minimal flowrate so that the transfer does not happen quickly (0.25 LPH) and also that this pump should be API 676 compliant.

We gave a Viking Pump with some deviations to API 676.
The pump manufacturer gave us reason that " for a transfer pump to be API 676 compliant, minimum flowrate required is 0.5 LPH "

 

[ApplicationENG]

You should ask in what section they are referencing in API 676 that limits the minimum flow.

 

[Pumpsonly]

API 675 pump can also be used for transferring from tank to tank. If you client is concerned about flow rate, the more
reason to use API 675 pump. The flow rate can be adjusted very precisely to suit the requirement.

 

[micalbrch]

Kaleem1013: It seems that you do not have the API 676 standard and you do not trust in what Viking tells you. I do not have the standard neither but would trust in what Viking says. So, submit that answer to your client and see what he responses. Perhaps he accepts the deviation and your problem is solved.

 

[DubMac]

Not to be rude, but it sounds like your client knows very little about pumps, and even less about API standards. Rather than admit ignorance, or to blindly cover themselves, or even to dodge doing any work themselves, many clients will simply require "API XXX" compliance rather than tell you what they are really concerned with.

I think I saw a post here awhile back about this practice. It is a shame, but it is becoming all too common in this "cut & paste" world of Engineering. 100% compliance is rarely acheived by any manufacturer for any API pump standard. If someone said they were 100% compliant with API 610, 674,675,676; it would raise large red flags in my mind.

Typically a company will quote a pump and say: We comply with APIXXX with the following "Comments & Exceptions", and then list them out individually according to the paragraph#. It is then up to the Purchaser to decide whether or the points of non-compliance are acceptable or not for that particular service. By the way, API standards are only meant as guides and not the final word on pump construction. Where there is a conflict, the Customer's Data sheet actually takes preference over the API standard.

 

[Pumpsonly]

Dubmac, fully agree with your remarks..I had an encounted with a customer who insisted on API 610 pump for pumping water to the toilet for flushing. The reason " we are a refinery, all our pump must API compliance."