Bursting Pressure 2r4p1m

According to ASTM A106 GRADE B SEAMLESS NOM.

SCHED.

6” 10”

40 40

D

S

inch 6.625 10.750

mm 168.3 273.0

inch 0.280 0.365

mm 7.1 9.3

Chemical Composition: Elements, (max %) Carbon Manganese Phosphorus Sulfur Silicon Chrome Copper Molybdenum Nickel Vanadium

Grade B 0.30 0.29 to 1.06 0.035 0.035 0.10 0.40 0.40 0.15 0.40 0.08

The minimum yield strength according to API 5L is 35 ksi and minimum tensile strength is 60 ksi [413 MPa] Barlow’s Formulae is given by: =

2



Where P

= max. working pressure (psig)

s

= material strength (psi)

t

= wall thickness (in)

do

= outside diameter (in)

For 6” SCHED.40 pipe =

2

=

2 × 0.280 × 60000 = 5,071.7 6.625

≈ 349.7



=

2 × 0.365 × 60000 = 4,074.4 10.750

≈ 280.9



For 10” SCHED.40 pipe =

2

Note: Safety factor is excluded (in general 1.5 to 10)