Ref : Non-Mandatory Appendix L
I would like to understand the meaning of "UW-11(a)(5)(b) Not MET E = 0.85" For Seamless Head, in the Flow Chart Fig. L-1.4 - 2 Joint Efficiency and Weld Joint Type - HEADS
In this Flow Chart, against Seamless Head (after not selecting Full RT Mandatory UW-11(a)), there are 2 joint Efficiencies for 2 different conditions.
Condition 1: UW-11(a)(5)(b) MET E = 1.0
Condition 2: UW-11(a)(5)(b) Not MET E = 0.85 (1)
Can any one interpret the meaning of condition 2?
Is it the same which I think.....?
a. All Category A Joints are not fully radio graphed
And / OR
B. All Category B Joints of vessel are not spot radio graphed as per UW-11(a)(5)(b)
Please elaborate on this.
And now the main question:
The question arises - when we are using the SEAMLESS head, whatever may be the RT selection for the entire vessel, why we can not take joint efficiency as 1.0 for calculating the thickness of only that seamless head.
I would like to understand the meaning of "UW-11(a)(5)(b) Not MET E = 0.85" For Seamless Head, in the Flow Chart Fig. L-1.4 - 2 Joint Efficiency and Weld Joint Type - HEADS
In this Flow Chart, against Seamless Head (after not selecting Full RT Mandatory UW-11(a)), there are 2 joint Efficiencies for 2 different conditions.
Condition 1: UW-11(a)(5)(b) MET E = 1.0
Condition 2: UW-11(a)(5)(b) Not MET E = 0.85 (1)
Can any one interpret the meaning of condition 2?
Is it the same which I think.....?
a. All Category A Joints are not fully radio graphed
And / OR
B. All Category B Joints of vessel are not spot radio graphed as per UW-11(a)(5)(b)
Please elaborate on this.
And now the main question:
The question arises - when we are using the SEAMLESS head, whatever may be the RT selection for the entire vessel, why we can not take joint efficiency as 1.0 for calculating the thickness of only that seamless head.