Datasheets / Specifications 2

[NickParker]

When raising a RFQ to purchase any equipment, is it must to provide the vendor with both datasheet and specification?

As I understand, One need only "specification" - exclusive for the requirements of the specific customer and/or project, to fine tune the requirements, of course, meeting the general requirements mentioned in relevant Standards. Therefore think it is redundant to provide both the datasheet and specification.

Why this practice is followed in many EPC companies?

 

[Hoxton123]

I'm thinking of an ac generator (aka alternator).

The specification would detail the common features:
type of bearings: sleeve, ball roller, location bearing lube oil or grease lubrication
ventilation and direction of airflow, air or water cooled.
Vertical or horizontal mount
and so on including, factory and site testing IEC / ANSI standard no etc.

Data sheet might list some of the above, but would also detail the MVA rating, power factor, reactances and efficiencies specific to the selected machine.

Does this reflect what you are asking?

 

[dpc]

It's not a must. If everything is detailed in the specifications, the data sheet isn't strictly necessary. Generally, it is easier to have a fairly standardized written specification that doesn't change much and call out the specific ratings and requirements in a data sheet, especially if the same specification could be covering multiple units of similar equipment.

You don't need a spec or a data sheet if your risk tolerance is high enough.

 

[Gr8blu]

As other posters have mentioned - is the intent to write the specification EVERY TIME FROM GROUND ZERO whenever something needs to be ordered? If not, use a specification for the "common" critical-to-(whatever) requirements. Then use a datasheet for the stuff that changes from one order to the next.

Example: Specification indicates equipment must have thermal sensors. Data sheet lists quantity and/or type (which may vary from one unit to another).

Converting energy to motion for more than half a century

 

[LionelHutz]

To me, a specification details what you want to be sold and a datasheet details the device a vender is trying to sell you.

 

[Hoxton123]

... and you amalgamate the two when you go for purchase ...

 

[LionelHutz]

... and you amalgamate the two when you go for purchase ...

You shouldn't need to send any specifications or datasheets when purchasing, the RFQ with clarifications should have sorted out exactly what you're purchasing by that time.