Beginning to SA-450 meaning

[limesh M]

Dear All,

 

I found that,Beginning to SA-450 on the front page of ASME BPV SEC II Part A 2010 Edition.What it means?

 

 

Regards,

 

Limesh

[Ken O'Berry]

Limesh,

 

There are two Section II Part A volumes.  You have the Beginning to SA 450 on the first volume and the second volume is  SA 451 thru End.

 

Thank you,

Ken

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[vijay panchal]

PLS can u tell me that how much overcrowing is permissible in 2:1 ellispodial dishend and trospherical and in section vii Where to refer
pls its urgent i need u r help


 thanks
vijay

--

[israr]

Pls Refer- UG 81, Over crowining 1-1/4% of ID and Under crowining 5/8%
of ID.

Regards
Israr Ahmed(Surveyor)
Tata Projects Ltd.
+919930308261

On Oct 21, 10:40 am, vijay panchal <panchalvijay...@gmail.com> wrote:
> PLS can u tell me that how much overcrowing is permissible in 2:1
> ellispodial dishend and trospherical and in section vii Where to refer
> pls its urgent i need u r help
>
>  thanks
> vijay
>
>
>

> On Tue, Oct 19, 2010 at 7:14 PM, limesh M <limes...@gmail.com> wrote:
> > *Dear All,*
> > **
> > *I found that,Beginning to SA-450 on the front page of ASME BPV SEC II
> > Part A 2010 Edition.What it means? *
> > **
> > **
> > *Regards,*
> > **
> > *Limesh*

>
> > --
> > To post to this group, send email to material...@googlegroups.com
> > To unsubscribe from this group, send email to
> > materials-weld...@googlegroups.com
> > For more options, visit this group's bolg at
> >http://materials-welding.blogspot.com/
> > The views expressed/exchnaged in this group are members personel views and
> > meant for educational purposes only, Users must take their own decisions

> > w.r.t. applicable code/standard/contract documents.- Hide quoted text -
>
> - Show quoted text -

[Karthik]

Hi, Please refer UG 81 for tolerance for formed heads. Find the extraction below.   UG-81 TOLERANCE FOR FORMED HEADS (a) The inner surface of a torispherical, toriconical, hemispherical, or ellipsoidal head shall not deviate outside of the specified shape by more than 1 1⁄4% of D nor inside the specified shape by more than 5⁄8% of D, where D is the nominal inside diameter of the vessel shell at point of attachment. Such deviations shall be measured perpendicular to the specified shape and shall not be abrupt. The knuckle radius shall not be less than that specified. (b) Hemispherical heads or any spherical portion of a torispherical or ellipsoidal head designed for external pressure shall, in addition to satisfying (a) above, meet the tolerances specified for spheres in UG-80(b) using a value of 0.5 for L/Do. (c) Measurements for determining the deviations specified in (a) above shall be taken from the surface of the base metal and not from welds. (d) The skirts of heads shall be sufficiently true to round so that the difference between the maximum and minimum inside diameters shall not exceed 1% of the nominal diameter. (e) When the skirt of any unstayed formed head is machined to make a driving fit into or over a shell, the thickness shall not be reduced to less than 90% of that required for a blank head (see UW-13) or the thickness of the shell at the point of attachment. When so machined, the transition from the machined thickness to the original thickness of the head shall not be abrupt but shall be tapered for a distance of at least three times the difference between the thicknesses. Thanks & regards,   (karthik) Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282 --- On Thu, 10/21/10, vijay panchal <panchal...@gmail.com> wrote:

[limesh M]

Dear All,

 

Could you please explain the term 'over crowing' ?

 

Regards,

 

Limesh

[B.Raghuram]

Dear vijay
pl don't distrub the existing thread, your query should have been posted in a seperate thread with an appropriate subject line.
This makes our life simple for archiving/retrival of the message data base.

Sent from my Nokia phone

-----Original Message-----
From: limesh M
Sent: 23/10/2010 9:41:06 am
Subject: Re: [MW:7726] Beginning to SA-450 meaning

Dear All,

Could you please explain the term 'over crowing' ?

Regards,

Limesh

On Fri, Oct 22, 2010 at 6:50 AM, Karthik <karth...@yahoo.com> wrote:

> Hi,
> Please refer UG 81 for tolerance for formed heads. Find the extraction
> below.
>

> *

>
> UG-81 TOLERANCE FOR FORMED HEADS

> **
>
> (a)
> *The inner surface of a torispherical, toriconical,

>
> hemispherical, or ellipsoidal head shall not deviate outside
>
> of the specified shape by more than 1
>

> 1⁄4% of *D *nor inside

>
> the specified shape by more than

> 5⁄8% of *D*, where *D *is the

>
> nominal inside diameter of the vessel shell at point of
>
> attachment. Such deviations shall be measured perpendicular
>
> to the specified shape and shall not be abrupt. The
>
> knuckle radius shall not be less than that specified.
>

> *
>
> (b)
> *Hemispherical heads or any spherical portion of a

>
> torispherical or ellipsoidal head designed for external pressure
>
> shall, in addition to satisfying (a) above, meet the
>
> tolerances specified for spheres in UG-80(b) using a value
>
> of 0.5 for
>

> *L/Do*.*
>
> (c)
> *Measurements for determining the deviations specified

>
> in (a) above shall be taken from the surface of the
>
> base metal and not from welds.
>

> *
>
> (d)
> *The skirts of heads shall be sufficiently true to round

>
> so that the difference between the maximum and minimum
>
> inside diameters shall not exceed 1% of the nominal
>
> diameter.
>

> *
>
> (e)
> *When the skirt of any unstayed formed head is

>
> machined to make a driving fit into or over a shell, the
>
> thickness shall not be reduced to less than 90% of that
>
> required for a blank head (see UW-13) or the thickness of
>
> the shell at the point of attachment. When so machined,
>
> the transition from the machined thickness to the original
>
> thickness of the head shall not be abrupt but shall be tapered
>
> for a distance of at least three times the difference between
> the thicknesses.
>
>
> Thanks & regards,
>
> (karthik)

> *Karthikeyan.S*
> *QA/QC Manager*
> *Getabec Energy Co.,Ltd.*
> *379,Moo6,Soi8,Nikhomphatana,*
> *Rayong-21180,*
> *Thailand.*
> *Phone: 0066 38 897035-8 (Off)*
> *Fax: 0066 38 897034*
> *Hand Phone: 0066 892512282*

>
>
> --- On *Thu, 10/21/10, vijay panchal <panchal...@gmail.com>* wrote:
>
>
> From: vijay panchal <panchal...@gmail.com>
> Subject: Re: [MW:7687] Beginning to SA-450 meaning
> To: material...@googlegroups.com, lime...@gmail.com
> Date: Thursday, October 21, 2010, 12:40 PM
>
>
> PLS can u tell me that how much overcrowing is permissible in 2:1
> ellispodial dishend and trospherical and in section vii Where to refer
> pls its urgent i need u r help
>
>
> thanks
> vijay
>

> On Tue, Oct 19, 2010 at 7:14 PM, limesh M <lime...@gmail.com<http://us.mc1205.mail.yahoo.com/mc/compose?to=lime...@gmail.com>
> > wrote:
>
> *Dear All,*
> **
> *I found that,Beginning to SA-450 on the front page of ASME BPV SEC II

> Part A 2010 Edition.What it means? *
> **
> **
> *Regards,*
> **
> *Limesh*

> --
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