B.127

TAB

LE

B4.

3cSI

Fs f

or T

ypic

al W

eldo

let

Bra

nch

Con

nect

ions

(R

un P

ipe

Size

: NPS

2½

(D

N 6

5) a

nd N

PS 3

(D

N 8

0)

1 in

= 2

5.4

mm

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STRESS ANALYSIS OF PIPING SYSTEMS

B.128

TAB

LE

B4.

3dSI

Fs f

or T

ypic

al W

eldo

let

Bra

nch

Con

nect

ions

(R

un P

ipe

Size

: NPS

4 (

DN

100

) an

d 6

or (

DN

150

)

1 in

= 2

5.4

mm

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STRESS ANALYSIS OF PIPING SYSTEMS

STRESS ANALYSIS OF PIPING SYSTEMS B.129

(B4.21)

where t = run pipe wall thickness, in r = run pipe mean radius, in rb = branch pipe mean radius, in

These equations are for integrally reinforced branch connections such as latrolets. Bythe analogy used in Fig. NC-3673.2(b)-1 in Section III of the ASME Code, the SIF forunreinforced 45° branch connections (stub-ins) can be obtained by multiplying thefactors obtained above by (4.4)2/3 = 2.685.

TABLE B4.3e SIFs for Typical Weldolet Branch Connections (Run Pipe Size: NPS 8 orDN 200)

1 in = 25.4 mm

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STRESS ANALYSIS OF PIPING SYSTEMS

GENERIC DESIGN CONSIDERATIONSB.130

e. Pipet

(B4.22)

TABLE B4.3f SIFs for Typical Weldolet Branch Connections (Run Pipe Size: NPS 10(DN 250))

1 in = 25.4 mm

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STRESS ANALYSIS OF PIPING SYSTEMS

STRESS ANALYSIS OF PIPING SYSTEMS B.131

f. Branchlet

(B4.23)

g. Reducing elbow

(B4.24)

TABLE B4.3g SIFs for Typical Weldolet Branch Connections (Run Pipe Size: NPS 12 orDN 300)

1 in = 25.4 mm

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STRESS ANALYSIS OF PIPING SYSTEMS