page 86.0.STRENGTH CALCULATIONS FOR STUBS (IBR 338)Pipe material
used :SA 106 GR.B2f(t-c)WP=----------D-t+cWhere,WP =Calculated
Working pressure in kg/cm2f =Allowable stress in kg/cm2D =Outside
diameter of pipe stub in cmt =Minimum thick of pipe stub after
consideringnegative tolerance (12.5%) in cmC =0.075cmPart
No.DescriptionDThicktMaterialfWPRemarksin mmin mmminin
kg/cm223Drain stub48.33.680.32201202129.56022Riser
stub88.95.490.48001202137.320ACTUAL WORKING PRESSURE IS 14.00
KG/CM2(G)7.0. WATER WALL HEADER END ATTACHMENT (IBR 342b &
340f)End plate is directly strength welded to the headerf(t-c)2WP
=-----------.eqn 89(A)d2KWhere,t =Thickness of plate at the weakest
part16mmD =Inner dia of header in mm198.48mmK =0f =Allowable stress
for SA 515/516 - Gr.700kg/cm2C =0mmWorking pressure in
kg/cm20.00kg/cm20
