ASME B31.1PRESSURE DESIGN STRAIGHT PIPE ( RUN PIPE)PRESSURE DESIGN STRAIGHT PIPE ( RUN PIPE)0.010.30.413.70.517.1STRAIGHT PIPE THICKNESS UNDER INTERNAL PRESSURE (tm) , mm.18.11STRAIGHT PIPE THICKNESS UNDER INTERNAL PRESSURE (tm) , mm.6.620.721.326.733.41. tm =[(PDo)/2(SE+PY)]+A18.112. tm =(Pd+2SEA+2YPA)/2(SE+PY-P)17.971. tm =[(PDo)/2(SE+PY)]+A6.622. tm =(Pd+2SEA+2YPA)/2(SE+PY-P)6.3042.248.3WhereWhere60.3PInternal Design Gauge Pressure, N/mm2.4.2PInternal Design Gauge Pressure, N/mm2.4.273DohOutside Diameter of Pipe, mm.711.2DobOutside Diameter of Pipe, mm.219.188.9SStress Value for Material, N/mm2.88.25SStress Value for Material, N/mm2.88.25101.6EQuality Factor For Longitudinal Weld Joints in Pipes.1EQuality Factor For Longitudinal Weld Joints in Pipes.1114.3YCoefficient for Materials.0.4YCoefficient for Materials.0.4141.3dInside Diameter of Pipe, mm.669.20dInside Diameter of Pipe, mm.193.10168.3Asum of mechanical, corrosion, erosion allowance,mm.1.5Asum of mechanical, corrosion, erosion allowance,mm.1.5219.1273.1323.9355.6406.4REINFORCEMENT OF WELDED BRANCH CONNECTIONS457.2508558.8609.6660.04711.2762812.8863.6914.4965.210161066.81117.61168.41219.2hsubscript referring to run or header.bsubscript referring to branch.Thnominal thickness of run or header.21Tbnominal thickness of branch.13d1effective length removed from pipe at branch, mm.199.35d2"half width" of reinforcement zone, mm.199.35L4height of reinforcement zone outside of run pipe, mm.42.19Tbbranch pipe thickness, mm.11.38Thrun pipe thickness, mm.18.38trminimum thickness of reinforcing pad, mm.18.4tmhpressure design thickness of run pipe, mm.18.11tmbpressure design thickness of branch pipe, mm.6.62smaller angle between axis of branch and run.90Doboutside diameter of branch pipe, mm.219.10Dohoutside diameter of run pipe, mm.711.201. d1 = [Dob - 2(Tb - A)]/sin 199.352. d2= greater of d1 or (Tb - A) + (Th - A) + d1/2126.43Therefore d2199.353. L4 = lesser of 2.5(Th - A), mm or42.192.5(Tb - A) + tr, mm.43.09REQUIRED REINFORCEMENT AREA1. A7 = (tmh - A)d1(2 - sin), mm23310.72AVAILABLE AREAA1 + A2 + A3 + A4 + A5 >= A7WhereA1Area resulting from excess thickness in the run pipe wall, mm2.53.31A2Area resulting from excess thickness in the branch pipe wall, mm2.401.51A3Area provided by deposited weld metal beyond the outside diameter of the run & branch, mm2.A4Area provided by a reinforcing ring, pad or integral reinforcement, mm2.A5Area provided by a saddle on right angle connection, mm2.1930.16DrOutside diameter of reinforcement ring, mm.324.00SrStress value for reinforcement ring material, N/mm2.88.25haHeight of the fillet weld between run pipe & reinforcement ring, mm.3.00hbHeight of the fillet weld between branch pipe & reinforcement ring, mm.3.001. A1 = (2d2 - d1)(Th - tmh)53.312. A2 = 2L4(Tb - tmb)/sin401.513. A5 = (Dr - Dob) tr1930.16A1 + A2454.82Additional reinforcement requiredYESA7 - ( A1 + A2 )