ASME-B31.3_2008-PipeCalculation

H OJ A D E C AL CU LO S CALCULATION SHEET

DPTO. INGENIERIA ENGINEERING DEPARTMENT COMANDO:

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JOB:

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CLIENT:

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PRODUCT:

PIPE THICKNESS CALCULATION FOR STRAIGHT PIPE UNDER INTERNAL PRESSURE DESIGN CODE 

ASME B -31.3 - 2008 2008 Editio n 

SKETCH 

DESIGN DATA SIMBOL P T D t c E UTP

UNITS [Psi] [°F] [in] [in] [in] [ ] [in]

VALUES 740.0 -65.0 16.000 0.375 0.0625 1.00 0.125

SIMBOL

UNITS

Sy

[Psi]

VALUES SA-333 GR 7 35000.00

S

[Psi]

21700.00

( SEE ASME B.31.3 TABLE 304.1.1 )

 Y

[ ]

0.40

WELD JOINT REDUCTION FACTOR ( SEE ASME B31.3 Section 302.3.5(e) )

W

[ ]

1.00

UT nt Ri d

[in] [in] [in] [in]

0.04688 0.26563 7.73438 15.46875

SIMBOL

UNITS

VALUES

t1 = P x D / 2( S x E x W + P x Y )

t1

t4 = P(d+2c)/2(SEW-P(1-Y))

t4

[in] [in]

0.269

t = Max(t1,t4) tm = t + c 

t tm

[in] [in]

0.269 0.332

DESIGN PRESSURE PRESSURE (Maximum service pressure for rating 150# at design temperature) DESIGN TEMPERATURE EXTERNAL DIAMETER NOMINAL THICKNESS USED MECHANICAL PLUS CORROSION AND EROSION ALLOWANCES

( Section 302.4 )

LONGITUDINAL EFFICIENCY ( SEE ASME B.31.3 T ABLE A-1B )

For Seamless pipe

UNDERTOLERANCE ALLOWANCE

MATERIAL DATA MATERIAL MINIMUM YIELD STRENGHT ALLOWABLE ALLOWABLE STRESS VALUE FOR MATERIAL @ TEMPERATURE COEFFICIENT Y

 ASME B.31.3 B.31.3 TABLE A-1

VARIABLES ACTUAL UNDERTOLERANCE NOMINAL THICKNESS WITHOUT UNDERTOLERANCE INTERNAL RADIOUS (wo UT) INTERNAL DIAMETER *wo UT)

UT = t x UTP  nt = (t - c - UT) Ri = (D / 2 - nt) d = Ri x 2 

RESULTS

PRESSURE DESIGN THICKNESS MINIMUM REQUIRED THICKNESS

0.269

CHECKING CONDITION A

Is MAX (t1, t4) =< nt ?

0.2693 =< 0.265625

FALSE

THICKNESS IS NOT ACCEPTABLE ACCEPTABLE CONDITION B

Is tmin < (D/6) ?

0.2693 < 2.6667

TRUE

GEOMETRY IS ACCEPTABLE CONDITION C

Is P / (SE) < 0.385 ?

0.0341 < 0.385

TRUE

PRESSURE RANGE IS ACCEPTABLE NOTES : 1. FOR ELBOWS MINIMUM PIPE PIPE SCHEDULE IS THE SAME THAN STRAIGHT PIPE (SEE 304.2.2) 2. DESIGN CONDITIONS DO NOT REQUIRE SPECIAL SPECIAL CONSIDERATIONS.

E.SANTILLAN BY

CHECKED

APPROVED

DATE

DATE

DATE

3. 4.