Boiler Thickness As per ASME SEC I PG-43 (Nozzle Neck Thickness)
Boiler Thickness As per ASME SEC I PG-43 (Nozzle Neck Thickness)
(OP)
Dear All
As per ASME SEC I What shall be Minimum nozzle Thickness as per PG-43
ple see below example
Nozzle DN 50( 2 in)
PG-43
The minimum thickness of a nozzle neck shall not be
less than the thickness required for the applicable loadings.
As per my internal Pressure this thickness is-2.18mm
PG43.1-The minimum required thickness of a seamless
shell or head to which it is attached
this thickness coming-13.46mm
PG 43.2 The minimum wall thickness of standard-wall
pipe listed in Table 2 of ASME B36.10M
this minimum thickness As per SCH STD is 3.42mm(including mill tolerance)
as my interpretation i can select sch 40 in design
or i no need to add Corrosion allowance in Sch 40
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RE: Boiler Thickness As per ASME SEC I PG-43 (Nozzle Neck Thickness)
For the above stated data :
first you need to take standard wall thickness which is 3.42mm. Then add corrosion allowance. Lets say its 1mm. Then total will be 4.42 mm. Now your provided nozzle thickness (0.875*Tn or Actually measured thickness) should be higher than 4.42 mm.
RE: Boiler Thickness As per ASME SEC I PG-43 (Nozzle Neck Thickness)
u stated add Ca in STD wall pipe
But why? PG-43 not indicate to add Ca in STD wall
yogesh