Agree to Disagree..LOL
All engineering companies i worked advise against use of raised face cast iron
flanges.
I explained the risk involved with that in my previous mail..
Also there is no cost benifit with raised face against flat face,
If anyone would like to take that risk, GO AHED..it is your call
Rgs,
Umesh Ken.,Senior Piping Project Engineer,
BECHTEL AUSTRALIA, Brisbane, QLD, Australia
Favorite quotes:
1. "Our lives begin to end the day we become silent about things that matter"
............ Dr. Martin Luther King, Jr
2. "Ones dignity may be assaulted, vandalized and cruelly mocked, but cannot be
taken away unless it is surrendered".....Michael J. Fox
3. "Life moves pretty fast, if you don't stop and look around once in a while
you could miss it" - Unknown
4. "You can't escape the responsibility of tomorrow by evading it today." -
Abraham Lincoln
5. "The whole problem with the world is that fools and fanatics are always so
certain of themselves, and wiser people so full of doubts" - Bertrand Russell.
6. "Technical Skill is the mastery of complexity, while Creativity is the
mastery of simplicity" - Unknown
7. "Success is a lousy teacher. It seduces smart people into thinking they can't
lose." – Bill Gates
8. "Moral courage is a more rare commodity than bravery in battle or great
intelligence". - Kennedy, Robert F
- Original Message ----
From: delacruzjuan1977 <delacruzjuan1977@yahoo.com>
To: PipingDesign@yahoogroups.com
Sent: Wednesday, January 30, 2008 10:22:30 PM
Subject: [PipingDesign] Re: Cast iron pump nozzle with RF flange
i beg to disagree. flanges having a flat faced are OK to be used in
a process plant. it is also not true that they cracked easily if the
joints are properly made.
what risk? risk is present if the consequence and probablities
(scenarios are assumed to be established by the end-user) are ranked
high in the risk matrix. that said, the consequence must be quite
significant and if it is - probably the designer will avoid all
together using a bolted joint.
Since the risk has been mentioned, do any of the piping designer or
engineer here have any exposure related to risk assessment as
applied in piping system?
can probably save your plant a significant amount of money and
streamline your work requirement at the plant..
- In PipingDesign@ yahoogroups. com, "umesh k.n." <umesh_kn@.. .>
wrote:
>
> The question here is..
>
> Is it not wise to use Flat faced flanges instead of using raised
face flanges, which could crack by a small mistake of bolt
tightening?
>
> Why we risk whole equipment for that.
>
> Rgs,
> Umesh Ken.,Senior Piping Project Engineer,
> BECHTEL AUSTRALIA, Brisbane, QLD, Australia
>
> Favorite quotes:
> 1. "Our lives begin to end the day we become silent about things
that matter" ........... Dr. Martin Luther King, Jr
> 2. "Ones dignity may be assaulted, vandalized and cruelly mocked,
but cannot be taken away unless it is surrendered" .....Michael J. Fox
> 3. "Life moves pretty fast, if you don't stop and look around once
in a while you could miss it" - Unknown
> 4. "You can't escape the responsibility of tomorrow by evading it
today." - Abraham Lincoln
> 5. "The whole problem with the world is that fools and fanatics
are always so certain of themselves, and wiser people so full of
doubts" - Bertrand Russell.
> 6. "Technical Skill is the mastery of complexity, while Creativity
is the mastery of simplicity" - Unknown
> 7. "Success is a lousy teacher. It seduces smart people into
thinking they can't lose." – Bill Gates
> 8. "Moral courage is a more rare commodity than bravery in battle
or great intelligence" . - Kennedy, Robert F
>
>
>
> ----- Original Message ----
> From: delacruzjuan1977 <delacruzjuan1977@ ...>
> To: PipingDesign@ yahoogroups. com
> Sent: Tuesday, January 29, 2008 10:40:49 PM
> Subject: [PipingDesign] Re: Cast iron pump nozzle with RF flange
>
> in our plants (we got several)bolted joints for all critical
equipment
> are always tightened using either bolt tensioning or torquing. . i
> mean always -doesnt matter wether its an emergency, a turnaround
or a
> routine work request or its sunny or raining. and why do you need
a
> code calc to tighten the bolts properly when charts or table are
> sufficient to the job right.
>
> for non-crtical equipment, bolted joint can be tightened using the
> impact wrench.
>
> --- In PipingDesign@ yahoogroups. com, "M. Engineer" <kahabib@ >
wrote:
> >
> >
> > Proper torque value can be witnessed and insured the
> > 1st time installation, but with the time insuring
> > proper torque bolting value by Maintenance is
> > questionable. Some time Maintenance crew work in the
> > evening or during emergency situation to remove or
> > install equipment. "to do some Code calculations to
> > back up your bolting" as suggested cannot be guranteed
> > all time. In addtion, what advantage or benefits to
> > utilize RF CI flange instead of FF in this situation ?
> >
>
>
>
>
>
>
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Received on Wed Jan 30 15:34:00 2008