Excellent sir! as I m beginner this video is very very useful for me now m waiting for your next video so plz upload as soon as possible ..thank you so much.
so what is the allowable % ratio for flange leak check. Moreover, the input of yield strength relates to yield strength of bolt or flange material. I think it must be bolt material.
Flange leakage check is applicable for all type of flanges based on the criteria provided in the Stress specification. You can check the detailed flange leakage method (ASME Section VIII Flange Leakage Checking Method available in Caesar ii)
We are using area of circle formula to calculate the bolt area of 1 bolt and to be multiplied by total no. of bolts to get the total area. In this video i have calculated Bolt area for your understanding. Please refer ASME B1.1 to get the Bolt area directly based on the thread.
Flange with High Strength Bolting: For flanges with bolting material having allowable stress at 38°C not less than 138 MPa shall be checked as per ASME Sec. Ill Division 1- Subsection NC, Clause NC- 3658.3. Mrs~ 3125 (Sy/ 36000) CAb Mrd ~ 6250 (Syl 36000) C Ab Where Mrs = bending or torsion moment (considered separately) applied to the joint due to weight, thermal expansion of piping, sustained anchor movements, relief valve steady state thrust and other sustained mechanical loads applied to the flange joint during the design or service condition, (in.-lb). Mrd = bending or torsion moment (considered separately) as defined for Mrs but including dynamic loadings applied to the flanged joint during the design or service condition, (in.-lb). C = bolt circle diameter, (in). Sy = yield strength of flange material at Design Temperature, (psi). Ab = total cross-sectional area of bolts at root of thread or section of least diameter under stress, (in2). The value of Syl 36000 shall not be taken as greater than unity.
Flange not covered in the above category, leakage check shall be carried out based on Equivalent Pressure method as per ASME SEC Ill Division1-Subsection NC, Clause No. NC-3658.1 (a) Et (b) as mentioned below. Tightness of flanged joints is acceptable if: System Design Pressure + Pe q
Hi Talla Diack, To check the Yield strength of material, we have to refer ASME BPVC Sec II Part D Table Y1. If u want more details. we discuss in detailed .. my mail id engineers@danlin.in whatsapp @+91 8800604940
Flange leakage check is applicable for all type of flanges based on the criteria provided in the Stress specification. First we will check the flange leakage using Equivalent Pressure method. If it fails in PEQ method, we will go for NC 3658.3 or ASME Section VIII detailed method
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In this video i have calculated Bolt area for your understanding.
Please refer ASME B1.1 to get the Bolt area directly based on the thread.
Excellent information 👍
Glad it was helpful!
Hi,
In NC method SYC yield strength and sy1 to sy9 values are comes differently
Yes, actually we need to consider Yield strength values based on the temperature..
I have considered the same values..
Excellent sir! as I m beginner this video is very very useful for me now m waiting for your next video so plz upload as soon as possible ..thank you so much.
thank you 👍
so what is the allowable % ratio for flange leak check. Moreover, the input of yield strength relates to yield strength of bolt or flange material. I think it must be bolt material.
Can you please share your mail id
Stress safety factor should me more than 1 (Allowed/actual) then it is passed in equivalent pressure method ?
Generally 1.5 times of Rated Pressure will be considered as Allowable in PEQ method
What method is appliable for RTJ flanges?
Flange leakage check is applicable for all type of flanges based on the criteria provided in the Stress specification.
You can check the detailed flange leakage method (ASME Section VIII Flange Leakage Checking Method available in Caesar ii)
B16.5 2013 - class 900 - diameter of bolt circle 616 mm, not 434? where did u get that number?
Dear Mr.bunc11, Thanks for your valid point. As per ASME B 16.5 For 16", 900# BCD is 616 mm only.
Hi Sir, thanks for knowledge sharing.can we have more videos please?
Yes.
hi after i run it, the allowable pressure/stress column only show zeroes value. What step did i miss?
Please share your mail id. You need to enter the flange analysis temperatures in Load case editor
@@BALAJIpiping bagindamuaz@gmail.com. Thanks in advance!
Thank 🙏🙏❤
Welcome 😊
How to get the bolt area calculated ?
We are using area of circle formula to calculate the bolt area of 1 bolt and to be multiplied by total no. of bolts to get the total area.
In this video i have calculated Bolt area for your understanding.
Please refer ASME B1.1 to get the Bolt area directly based on the thread.
What is the different between NC-3658.3 and Peq?
NC-3658.3 its for the nuclar piping and the peq is asme b16.5
Flange with High Strength Bolting:
For flanges with bolting material having allowable stress at 38°C not less than 138
MPa shall be checked as per ASME Sec. Ill Division 1- Subsection NC, Clause NC-
3658.3.
Mrs~ 3125 (Sy/ 36000) CAb
Mrd ~ 6250 (Syl 36000) C Ab
Where
Mrs = bending or torsion moment (considered separately) applied to the joint due to
weight, thermal expansion of piping, sustained anchor movements, relief valve steady state thrust and other sustained mechanical loads applied to the flange joint during the design or service condition, (in.-lb).
Mrd = bending or torsion moment (considered separately) as defined for Mrs but including dynamic loadings applied to the flanged joint during the design or service condition, (in.-lb).
C = bolt circle diameter, (in).
Sy = yield strength of flange material at Design Temperature, (psi).
Ab = total cross-sectional area of bolts at root of thread or section of least diameter under stress, (in2).
The value of Syl 36000 shall not be taken as greater than unity.
Flange not covered in the above category, leakage check shall be carried out based
on Equivalent Pressure method as per ASME SEC Ill Division1-Subsection NC, Clause
No. NC-3658.1 (a) Et (b) as mentioned below.
Tightness of flanged joints is acceptable if:
System Design Pressure + Pe q
My flanges' allowable stresses still equalize to 0. How can I overcome to this? Thank you
Hi Talla Diack, To check the Yield strength of material, we have to refer ASME BPVC Sec II Part D Table Y1. If u want more details. we discuss in detailed ..
my mail id
engineers@danlin.in
whatsapp @+91 8800604940
please switch on the flange analysis temperature in the load case editor
Sir, can you Please provide video on flange leackage check by ASME sec VIII method?
Yes sure.. Will try to add the video shortly..
@@BALAJIpiping I am waiting impatiently.
Sorry, due to other projects I couldn't do the video.. Will try to upload ASAP.
NC flange leakage is not applicable for all process piping. Therefore, calculations are not applicable in most cases.
Flange leakage check is applicable for all type of flanges based on the criteria provided in the Stress specification. First we will check the flange leakage using Equivalent Pressure method. If it fails in PEQ method, we will go for NC 3658.3 or ASME Section VIII detailed method