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2) Steam of 3.5MPA is transported in a pipe of outside diameter 450mm. (Pressure 3.5MPA) The walls of the pipe is 10mm. A gasket and flat plate is used to block the pipe. If a 40mm diameter bolt can carry a maximum stress of 80MPA and the initial stress in the bolt is 55MPA, how may bolts are needed? What is the circumferential stress in the pipe? Why is there an initial stress in the bolt? What will happen if the stress in the bolts = 2 x initial stress?

2) Steam of 3.5MPA is transported in a pipe of outside diameter 450mm. (Pressure 3.5MPA) The walls of the pipe is 10mm. A gasket and flat plate is used to block the pipe. If a 40mm diameter bolt can carry a maximum stress of 80MPA and the initial stress in the bolt is 55MPA, how may bolts are needed? What is the circumferential stress in the pipe? Why is there an initial stress in the bolt? What will happen if the stress in the bolts = 2 x initial stress?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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2) Steam of 3.5MPa is transported in a pipe of outside diameter 450mm. (Pressure 3.5MPA) The walls of the pipe is 10mm. A gasket and flat plate is used to block the pipe. If a 40mm diameter bolt can carry a maximum stress of 80MPA and the initial stress in the bolt is 55MPA, how may bolts are needed? What is the circumferential stress in the pipe? Why is there an initial stress in the bolt? What will happen if the stress in the bolts = 2 x initial stress? CS Scanned with CamScanner
Transcribed Image Text:2) Steam of 3.5MPa is transported in a pipe of outside diameter 450mm. (Pressure 3.5MPA) The walls of the pipe is 10mm. A gasket and flat plate is used to block the pipe. If a 40mm diameter bolt can carry a maximum stress of 80MPA and the initial stress in the bolt is 55MPA, how may bolts are needed? What is the circumferential stress in the pipe? Why is there an initial stress in the bolt? What will happen if the stress in the bolts = 2 x initial stress? CS Scanned with CamScanner
Expert Solution
Step 1

Given data 

Steam pressure = 3.5 MPa

OD of pipe (D) = 450 mm 

thickness of pipe (t) = 10mm

bolt dia (db) = 40 mm 

Maximum stress carried by bolt (σallow) = 80 MPa

Initial stress in the bolt = 55 MPa

 

To determine 

  • No. of bolts
  • circumferential stress in the pipe 
  • if stress in the bolt is twice its initial value
steps

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