hi
i used eq : p=2se(t-c)/d-2×y(t-c) to calc max pressure for A106-B seamless at temp 100F
Od=1.315 , t=0.133"-12.5% s=137.9mpa
Result=26.3mpa or 263bar
but i visited some websites and got following formula with safety factor ( while b31.3 not mentioned safety factor just states basic...
please help me to understand note2
Note 2 : (min energy for subsize) = it says min energy for standard_size depend on tensile × subsize_width/Full_size(10)
if min energy for full size = 18 j and obtainable size be 5 mm so 18× (5/10) =18×0.5=9 j ???
Why cannot use Code UG-28(f) for vessel under external pressure greater than 15 psi ? it is depend on temperature Or material impacy testing ... another question is there temp l8mitation for 15psi and where can i find it in Asme section viii ?
Hi
i could not extract factor A from tabluar values figure G
Material from table HA-1
D/T=69.7
L/D=50
1-A=?
2- if there is not same D/L according to L/D how shall be do , forexample in above there are 50 in L/D 60 and also 80
Ex: D/t=20 , L/D=40 A=0.275-02
D/t=22 , L/D=40 Whats A ...
hi
ucs-66(b)(3) describes if the material no need pwht but pwht done for it can reduction 17C ? or if pwht not requirement of this code (asme viii ) but the material required pwht by b31.3 (20mm) and this material repostweld can use 17c reduction ?
which ones are true?
hi
following material needs impact testing in pqr ? if yes what is examination temperature
BPV
Material : A516-70N
thk=10mm
temp : -40C
(f) Impact testing per UG-84 is not mandatory for pres-
sure vessel materials that satisfy all of the following:
(1) The material shall be limited to...
plz see the Table S301.3.1 Generic Pipe Stress Model Input ( b31.3 ) it gives the stress value of material ( A106-B ) at 288 degree = 18.1 ksi or 125 mpa , based on interapolation from table A-1 or A-1M :
500 F 600 F
19 ksi 17.9ksi
result : ~18.45 ksi / 127mpa
what s wrong?
Hi
Excuse me ask here
but
have drawn somebody developement of Pipe branch 2 " ( outlet ) to side of elbow sr 8" ... intersection of pipe to side of elbow sr
Construction code ASME B31.3
Material A106 Gr. B
The thickness of Pipe. 17.48 mm
Temperature Limit 0^ F (-17.78^ C)
PWHT yes.
Table A-1 refers to curve B
Table 323.2.2A minimum Temperature without Impact Testing for CS showing under curve B 9^ F ( 12.8^ C).
My Question is for above case Impact...
Hi All
what s the stress ratio for pipe A333 thk 12.7 mm at design pressure 15 bar and temp -46 Centigrade? what s the min thk for this pipe ( it refers to table 323.3.1 ?
please give me the value
As Per table's(323.2.2B) note
GENERAL NOTES:
(a) The stress ratio is defined as the maximum...
Hi,All
what s the temperature reduction for material with thickness 5.49mm in the table of asme b31.3 ( Toughness ) just list temp reduction for thk 5 & 6 mm
1-How to calc welding neck flange thickness asme b16.5 Example for 3" is 27mm min
2-As per appendix 2 for calculation of blind flange thk attached by bolting needs total bolt data and b .. where can i find this data about flange 32" ? is there a catalogue or any site to mention all
could...
Hi
Less than 80%
be conducted at a temperature lower than the design minimum temperature by an amount equal to the difference (referring to Table 323.3.4) between the temperature reduction corresponding to the actual material thickness and the temperature reduction corresponding to the Charpy...
Hi
With this pqr's data
Test coupon thk =0.5"
Process GTAW+SMAW
GT:4mm , SM :8mm
With Impact test
PNO1GR1/2 TO PNO1GR1/2
Code use ... B31.3
the welder can weld branch with od 8" with s20 to 12" header sch30 (pipe)? It needs preparing another pqr ?
Min impact requirement is -46 C or...
