flangia pn6 dn500

[mir]

Hi.
I was looking for a pn6 dn500 flange and found this table:
http://mdmetric.com/tech/6088uniset.pdfNow it seems incredibly oversized the dn500 reported on the front page (free phlanges uni 6088-67 pn 6)

What do you say?

Hi.
♪

 

[gerod]

oversized than what?
I don't understand what you're referring to. if they are unified there will be a reason!
will the "over" be compared to a dimension?

clarify your statement.

 

[maxopus]

maybe you refer to the thickness.... a flange of the genus must hold 6 bars (it would be necessary to use the pascal) for cm^2 plus the safety margin
try to multiply this data by the application surface and see what comes out of it.

 

[rero]

maybe you refer to the thickness.... a flange of the genus must hold 6 bars (it would be necessary to use the pascal) for cm^2 plus the safety margin
try to multiply this data by the application surface and see what comes out of it.

quoting in full

 

[mir]

I am especially impressed by the bolt:

0.6 mpa = 0.6 n/mm2
0.6 n/mm2 * lazy * 250 = 117750 n
for 20 screws m20 class 8.8 = 5887.5 n
effective area = 2.45 cm2 = 245 mm2
= 5887.5/245 = 23.5 n/mm2
Allowable traction sigma = 396 n/mm2
(ii) the Commission's proposal for a Council Regulation (EEC) amending Regulation (EEC) No 1408/71 on the application of Community law in respect of the application of Article 2 of Regulation (EEC) No 1408/71.

There is to say that you have to talk about preserraggio in the flanges but if I have nothing wrong I have a huge security coeff.

What do you say?

 

[gerod]

Well, on the screws I saw a much higher coefficient than the 16 you found.
depends on your use.
if you need m6 screws then we should have a huge amount of variables and therefore flanges to cover any application. He was chosen to unify them for this, or to have a definite range.

 

[MBT]

I am especially impressed by the bolt:

0.6 mpa = 0.6 n/mm2
0.6 n/mm2 * lazy * 250 = 117750 n
for 20 screws m20 class 8.8 = 5887.5 n
effective area = 2.45 cm2 = 245 mm2
= 5887.5/245 = 23.5 n/mm2
Allowable traction sigma = 396 n/mm2
(ii) the Commission's proposal for a Council Regulation (EEC) amending Regulation (EEC) No 1408/71 on the application of Community law in respect of the application of Article 2 of Regulation (EEC) No 1408/71.

There is to say that you have to talk about preserraggio in the flanges but if I have nothing wrong I have a huge security coeff.

What do you say?

But would you see a dn 500 flange with the m6 vines?? ? ?

a former office of mine told me "look that in steelworks they do not even know that there are keys for smaller screws of the m16!"
In fact the inspection covers, little more than an a3, had screws of 16!

 

[Fulvio Romano]

But would you see a dn 500 flange with the m6 vines?? ? ?

a former office of mine told me "look that in steelworks they do not even know that there are keys for smaller screws of the m16!"
In fact the inspection covers, little more than an a3, had screws of 16!

very wise.. . it is often forgotten that putting the screws "right" from a dimensional point of view, it is often wrong on the side of comfort.
in steelworks do not have the screwdrivers from orology, so avoid small screws. but also, if a machine has all screws m16, and somewhere it would be enough a m12, it should be put the m16 for at least two reasons:
1) with only one key remove all the piece
2) if you fall a screw at altitude 0, and you are at altitude 12000 (at the fourth floor)...it is nice to have a screw of exchange all the same.. .

maybe you refer to the thickness.... a flange of the genus must hold 6 bars (it would be necessary to use the pascal) for cm^2 plus the safety margin
try to multiply this data by the application surface and see what comes out of it.

wow maxopus...bar per cm^2 what is it? a kind of moment of inertia?:biggrin:
Come on.

 

[maxopus]

very wise.. . it is often forgotten that putting the screws "right" from a dimensional point of view, it is often wrong on the side of comfort.
in steelworks do not have the screwdrivers from orology, so avoid small screws. but also, if a machine has all screws m16, and somewhere it would be enough a m12, it should be put the m16 for at least two reasons:
1) with only one key remove all the piece
2) if you fall a screw at altitude 0, and you are at altitude 12000 (at the fourth floor)...it is nice to have a screw of exchange all the same.. .


wow maxopus...bar per cm^2 what is it? a kind of moment of inertia?:biggrin:
Come on.

I mean kg/cm^2... or bar that's almost the same thing and I got wrapped up:redface:

 

[mir]

I understand... I don't say pass from m20 to m6... but I mean a middle way. Excuse me, but isn't there a hard work speech about bolts?