The calculation of the minimum wall thickness of the connecting pipe on the ASME head is mainly based on the relevant provisions and formulas in the ASME standard. The following are the specific calculation methods and steps:
Basic formulas and parameters:
The required thickness of the cylinder under internal pressure: According to ASME standards, the minimum wall thickness of the connecting pipe can be calculated by adding the required thickness of the cylinder under internal pressure to the corrosion allowance. The specific formula is:
[T_ {UG-45}=t_a+\ text {corrosion allowance}]
Among them, [t_a] is the thickness calculated based on UG-22 load.
Calculation methods in different situations:
UG-45 (a): For the takeover of manholes, handholes, and other inspection holes, the calculation only needs to consider the load of UG-22.
UG-45 (b) (1): The required thickness of the cylinder under internal pressure plus corrosion allowance.
UG-45 (b) (4): Minimum standard wall thickness of the pipe plus corrosion allowance.
Other related parameters:
Corrosion allowance: When calculating the wall thickness of the connecting pipe, corrosion allowance needs to be considered. If using pipe materials, the required pipe wall thickness series should be:
[t_{\text{nom}} = 0.128 \text{ in.}]
Minimum wall thickness requirement: The required thickness for the connecting pipe should not be less than 0.112 inches. If pipe material is used, the required pipe wall thickness series should be 0.128 inches.
