Pipe Thickness Calculation.pdf

PIPE THICKNESS CALCULATIONS  As per A SME B 31.3 - 1996 Edit io n, 1998 Ad den da.

Design Data : Design Pressure Nominal Pipe Size Nominal wall thickness

P

: : :

tn

Material Spec.

:

Corrosion Allowance Coefficient (Table 304.1.1) Note Note :

c

:

y

:

 

46 barg 200 NPS 8.179 mm

Design Temp. Outside Diameter  Minimum wall thickness

A 106 Gr.B

Stress Value @

3.00 mm

93

Stress Value @ Quality Factor 

0.4 ( t < D/6 )

38

o

C

o

C

tmin

93 C 219.075 mm mm 7.156 mm *)

Sd

:

1,379 bar 

St

:

1,379 bar 

E

:

1

*) Mini Minimu mum m thi thick ckne ness ss of pipe pipe is equa equall to Nomi Nomina nall thi thick ckne ness ss x 0.87 0.875 5

Required thickness : Para. 304.1.2

P*D 2*(Sd*E + y*P)

t =

+c

=

 

6.60

mm

< thk. selected, selected, thus OK

40

Pipe selected selected sch edule

Maximum Allo wable Pressure (New (New & Cold) St*E*tmin P(N+C) = =   92.51 (D/2) - y*tmin

barg

Maximum Allow able Working Pressure (H (Hot ot & Corro ded) Sd*E*(tmin-c) P(H+C) = = 53 barg (D/2) - y*(tmin-c) Max im im um um A llll ow ow ab ab le le No n Sh oc oc k W.P. o f Fl an an ge ge Mat er er ia ial Gr ad ad e  At ax m u m

93 owa e

Hydrotest Pressure Para. 345.4.2

o

C Design Temperature for  or n g =

r es s ur ur e

A 105

300 lb lb, ANSI Rating = max

  1.5 x Pmax x St / Sd

=

arg, =

(Gr ou ou p 1.1)

 

 

47 barg m e

y:

69.81 barg

o

: : :

T D

ange