Hydrotest flange thickness calculation
Chaitanya Purohit
Please help to reply to the below query....
From: Mithun Murali <Mithun...@dodsaldxb.ae>
Date: 2009/9/27
Subject: Query regarding Hydrotest flanges
To: chaitany...@yahoo.co.in
Hi Chaitanya,
Can you ask this query in the group as I am unable to do so.
Any calculation sheet or method available for Thickness calculation for Blind Flange for 64 “ CS pipeline hydrotest.(test pr of 83 barg), 400# rating.
I had referred to one of the Client spec, which demands 170mm thick plates for the same.
Any reference of Agency or Consultant doing these kind of Calculations.
Thanks and regards,
Mithun
Design Engineer - Piping
Dodsal Engineering & Construction Pte. Ltd.
Dubai, U.A.E.
Phone : +9714-3161279
Arunachalam A
Use UG 34 of ASME Section VIII Div 1
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ARUNACHALAM.A
050-5257122
Happiness Keeps You Sweet,
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Success Keeps You Glowing,
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Vinayak Kale
Chaitanya ,
Find out whether this is cross country pipeline or belongs to any petrochemical plant , because code limitation will differ , ASME B 31.3 has calculations about Blind flange , but size may limited
Thanks & Best Regards,
Vinayak Kale
E & C DIv. QA & I , OGSP
Larsen And Toubro Ltd
Powai , Mumbai
vinaya...@lntenc.com
Ph No.+91- 67053805/3685
Fax No. +91-67051988
(M) - + 91 9892743803
| Chaitanya Purohit <chaitany...@yahoo.co.in>
Sent by: material...@googlegroups.com 09/27/2009 07:06 PM
|
|
Hi Chaitanya,
Thanks and regards,
Mithun
Design Engineer - Piping
Dubai, U.A.E.
Phone : +9714-3161279
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sreedhar ch
| CARBON STEEL | ||||||
| - INPUT DATA - | INCH UNIT | METRIC UNIT | ||||
| 1. | MATERIAL | : | ASTM A515 GR.70 | |||
| ALLOWABLE STRESS(by B31.3) | : | 23100.00 | Psi | 1624.00 | ㎏/㎠G | |
| 2. | CORROSION ALLOWANCE (C) | : | 0.05 | inch | 1.30 | mm |
| 3. | PIPE QUALITY FACTOR(carbon은 1) | : | 1.00 | 1.00 | ||
| 4. | DESIGN PRESSURE(Kg/cm2G) | : | .00 | Psi | 57.00 | ㎏/㎠G |
| 5. | DESIGN TEMPERATURE( ℃) | : | .00 | 75.00 | ||
| 6. | FLUID | : | ||||
| - OUTPUT DATA - | ||||||
| 1. | The equation for wall thickness calculation based on ASME B31.3 | |||||
| tm = dg√(3P/16SE) + C | ||||||
| where, | ||||||
| tm : minimum required wall thickness in mm. | ||||||
| dg : inside diameter of gasket for raised or flat face flange or the gasket | ||||||
| pitch diameter for ring joint and fully retained gasketed flanged | ||||||
| E : joint efficiency or pipe quality factor | ||||||
| P : design pressure | ||||||
| S : allowable stress = ㎏/㎠ | ||||||
|
c : sum of allowance defined in para. 304.1.1
Using this formula the Thickness caluculates to 152.5 mm , Try for yourself if this could be helpful. | ||||||