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Blind Calculation - ASME

This document contains calculations for the minimum required thickness of spectacle blinds for 1" and 2" pipes based on ASME B31.3 standards. For the 1" pipe, the calculated minimum thickness is 32.86 mm, which is insufficient for the 20 mm spacer thickness. For the 2" pipe, the minimum thickness is 3.15 mm, which is sufficient for the 16 mm spacer thickness. The document provides test pressure, material, and stress values used in the calculations.

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Ridho Ziska
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796 views2 pages

Blind Calculation - ASME

This document contains calculations for the minimum required thickness of spectacle blinds for 1" and 2" pipes based on ASME B31.3 standards. For the 1" pipe, the calculated minimum thickness is 32.86 mm, which is insufficient for the 20 mm spacer thickness. For the 2" pipe, the minimum thickness is 3.15 mm, which is sufficient for the 16 mm spacer thickness. The document provides test pressure, material, and stress values used in the calculations.

Uploaded by

Ridho Ziska
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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PT PROFAB INDONESIA STANDARD FLANGE FOR KAOMBO PROJEC Page 1

JN1201 Spectackle Blind Calculation


For Hydrotest Condition Test Pressure 26 Barg
Based on ASME B31.3

Spectackle 1" 150 #


Test Pressure TP 1.65 MPa = 16.5 barg
Corrosion Allowance C 0.00

Material of blind A36 or equivalent


Spacer Thickness 20.00 mm
Applicable Allowable stres S 1400.00 Kg/cm2

(From Table A-1)

Calculation Based ASME B31.3 304.5.3

T min = Required Thickness


= B1*SQRT*(3*P/(16S))+C

PIPE ID (B1) PIPE INSIDE THK


PIPE SIZE
(MM) ( RADIUS) (ASME )
1" 699 349.5 32.86

Status t<tmin Thickness Insufficient


PT PROFAB INDONESIA STANDARD FLANGE FOR KAOMBO PROJEC Page 1

JN1201 Spectackle Blind Calculation


For Hydrotest Condition Test Pressure 26 Barg
Based on ASME B31.3

Spectackle 2" 150 #


Test Pressure TP 2.60 MPa = 26 barg
Corrosion Allowance C 0.00

Material of blind A36 or equivalent


Spacer Thickness 16.00 mm
Applicable Allowable stres S 1351.00 Kg/cm2

(From Table A-1)

Calculation Based ASME B31.3 304.5.3

T min = Required Thickness


= B1*SQRT*(3*P/(16S))+C

PIPE ID (B1) PIPE INSIDE THK


PIPE SIZE
(MM) ( RADIUS) (ASME )
2" 52.5 26.25 3.15

Status t>tmin Thickness Sufficient

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