ASME BPVC VIII Example E E PTB

Transcription

1 Table of contents Comparison - Form for equations... 2 Example E Integral Type... 3 E Bolted flanges ASME BPVC VIII DIVISION 1 APP. 2, 2017 Edition... 5 Example E Loose Type... 7 E Bolted flanges ASME BPVC VIII DIVISION 1 APP. 2, 2017 Edition... 9 Appendix: Material documentation Layout Input values: or Calculated values: or Critical values: or Estimated values: or Lauterbach Verfahrenstechnik GmbH

2 Comparison - Form for equations Equation form Comment Results for example E acc. ASME and Lauterbach Verfahrenstechnik GmbH (LV) The LV-program uses formulas for Bolted flanges acc. VIII-1, App.2. Equations Conversion factor mm2 = N2lbf = 'Results Ex. E LV and ASME Required load W acc. LV W1 = #23(1)*N2lbf Required load W ASME W1Asme = Difference % Diff1 = (W1Asme-W1)/W1Asme*100 'Results Ex. E LV and ASME Required load W acc. LV W2 = #23(2)*N2lbf Required load W ASME W2Asme = Difference % Diff2 = (W2Asme-W2)/W2Asme*100 'Maximum difference between LV and ASME Dmax = Max( Diff1 ; Diff2 ) Value Lauterbach Verfahrenstechnik GmbH

3 Example E Integral Type Determe if the stresses the heat exchanger girth flange are with acceptable limits, considerg the followg design conditions. The flange is of an tegral type and is attached to a cyldrical shell with a Category C, Type 1 butt weld and has been 100% radiographically examed. See Figure E General Data: Cylder Material = SA-516, Grade 70 Design Conditions = 135 F Allowable Stress at Design Temperature = psi Allowable Stress at Ambient Temperature = psi Corrosion Allowance = Flange Data: Material = SA-105 Allowable Stress at Design Temperature = psi Allowable Stress at Ambient Temperature = psi Modulus of Elasticity at Design Temperature = 26.0E + 06 psi Modulus of Elasticity at Ambient Temperature = 29.4E +06 psi Bolt Data: Material = SA-193, Grade B7 Allowable Stress at Design Temperature = psi Allowable Stress at Ambient Temperature = psi Diameter = 0.75 Number of Bolts = 44 Root area = Gasket Data: Material = Flat Metal Jacketed (Iron/Soft Steel) Gasket Factor = 3.75 Seatg Stress = 7600 psi Inside Diameter = 29.0 Outside Diameter = 30.0 Lauterbach Verfahrenstechnik GmbH

4 Design rules for bolted flange connections with rg type gaskets are provided Vlll-1 Mandatory Appendix 2. The rules this paragraph are the same as those provided Vlll-2, paragraph However, there are differences to be noted, cludg; a step-by-step design procedure, nomenclature with regard to operatg and gasket seatg bolt loads, the clusion of a flange moment due to externally applied axial forces and bendg moment, and mor differences bolt pacg criteria. Therefore, while the example problem will be presented for use with Vlll-1, Appendix 2, references to Vlll-2 paragraphs will be provided, as applicable. Evaluate the girth flange accordance with Vlll-1, Appendix 2. Establish the design conditions and gasket reaction diameter, (VIII-2, paragraph ). Lauterbach Verfahrenstechnik GmbH

5 E Bolted flanges ASME BPVC VIII DIVISION 1 APP. 2, 2017 Edition Integral Type Flange Design data Design pressure Hydrostatic head Calculation pressure Calculation temperature Flange P D D P P MPa 0 MPa MPa = p D = D p = p T 0 bar psi psi F Outside diameter A Inside diameter B Bolt circle diameter C Pipe size Hub length h Flange thickness t B n Large hub thickness g Small hub thick. g Material K03504-SA-105--Class:-Size: Allowable operatg stress Allowable stallation stress Corrosion allowance Modulus of elasticity at operation Modulus of elasticity at test (20 C) S fb S fa c 2 E T E MPa MPa Gasket Gasket diameter Effective gasket width Gasket factor Gasket seatg load [Table: 2-5.2] [Table: 2-5.1] [Table: 2-5.1] G b m y Lauterbach Verfahrenstechnik GmbH

6 Bolts Number Root diameter Nomal diameter Material G41400-SA-193-B7-Class:-Size:<=64 Allowable operatg stress Allowable stallation stress Consider bolt factor B SC 2-6(7)? n d K a S b S a (N=No) Y (Y/N) Required operation bolt load Mimum itial bolt load Available cross section of bolts Required cross section Required cross section Eq.(1) Eq.(2) W m1 /S b W m2 /S a W m1 W m2 A b A m1 A m lbf lbf ² ² ² Req. bolt load for gasket seatg Allowable bolt load (A m +A b ) S a /2 A b S a W W all lbf lbf (5) Design (gasket seatg =1; max. allowable=2) 1 (1,2) Moment M D = H D h D M G = H G h G M T = H T h T = = = Force Lever arm = Result lbf = lbf ft lbf = 1389 lbf ft lbf = 2700 lbf ft Total operatg moment = M D + M G + M T = Total gasket seatg moment, Eq. (6) = W (C-G)/2 = M 01 M lbf ft lbf ft Stress Operation Installation Allowable Longitudal S H S f (8) Ratio S H /S f S f Allowable stress Radial S R S f (9) Tangential S T S f (10) Combation (S H +S R )/2 = S f Combation (S H +S T )/2 = S f B S B Smax Bolt pitch = (3) Remark Lauterbach Verfahrenstechnik GmbH

7 Auxiliary values (Fig ) (Fig ) (Fig ) (Fig ) (Fig ) (Fig ) (Fig ) Eq.(1) Eq.(2) Bolt pitch Lauterbach Verfahrenstechnik GmbH

8 (3) For (7) KI (=0.3 acc. Table 2-14) = 0.3 J = V [M 01 or M 02 ]/L/[E or E 20C ]/(g 0 -c 2 )²/K L /h 0 = [ 2.333e+7 or 2.344e+7 ]/ /[ or ]/( )²/ 0.3 / Rigidity criterion: J Lauterbach Verfahrenstechnik GmbH

9 Example E Loose Type Determe if the stresses the ASME B16.5, Class 300, NPS 20 Slip-on Flange are with acceptable limits, considerg the followg design conditions. The flange is of a loose type with hub and is attached to a cyldrical shell with Category C fillet welds, see Vlll-1 Appendix 2, Figure 2-4 Sketch 3. General Data Cylder Material = SA-516, Grade 70 Design Conditions = 450 psig@650 F Allowable Stress at Design Temperature = psi Allowable Stress at Ambient Temperature = psi Corrosion Allowance = 0.0 Flange Data: Material = SA-105 Allowable Stress at Design Temperature = psi Allowable Stress at Ambient Temperature = psi Modulus of Elasticity at Design Temperature = 26.0E + 06 psi Modulus of Elasticity at Ambient Temperature = 29.4E +06 psi Bolt Data: Material = SA -193, Grade B7 Allowable Stress at Design Temperature = psi Allowable Stress at Ambient Temperature = psi Diameter = 1.25 Number of Bolts = 24 Root area = Gasket Data Material = Kammprofile Gasket Factor = 2.0 Seatg Stress = 2500 psi Inside Diameter = Outside Diameter = Lauterbach Verfahrenstechnik GmbH

10 Design rules for bolted flange connections with rg type gaskets are provided Vlll-1 Mandatory Appendix 2. The rules this paragraph are the same as those provided Vlll-2, paragraph However, there are differences to be noted, cludg; a step-by-step design procedure, nomenclature with regard to operatg and gasket seatg bolt loads, the clusion of a flange moment due to externally applied axial forces and bendg moment, and mor differences bolt spacg criteria. Therefore, while the example problem will be presented for use with Vlll-1, Appendix 2, references to Vlll-2 paragraphs will be provided, as applicable. Evaluate the flange accordance with Vlll-1, Appendix 2. Establish the design conditions and gasket seatg reaction diameter, (VIII-2, paragraph ). Lauterbach Verfahrenstechnik GmbH

11 E Bolted flanges ASME BPVC VIII DIVISION 1 APP. 2, 2017 Edition Loose Type Flange With Full Neck Design data Design pressure Hydrostatic head Calculation pressure Calculation temperature Flange P D MPa = p D D P 0 MPa = D p 0 P MPa = p T 0 bar bar bar C Outside diameter A mm Inside diameter B Bolt circle diameter C mm Pipe size B n 20.2 Hub length h mm Flange thickness t mm mm Large hub thickness g mm Small hub g thickness mm Material K03504-SA-105--Class:-Size: Allowable operatg stress Allowable stallation stress Corrosion allowance Modulus of elasticity at operation Modulus of elasticity at test (20 C) S fb S fa c 2 E T E mm MPa MPa Gasket Gasket diameter Effective gasket width Gasket factor Gasket seatg load [Table: 2-5.2] [Table: 2-5.1] [Table: 2-5.1] G b m y mm mm Lauterbach Verfahrenstechnik GmbH

12 Bolts Number Root diameter Nomal diameter Material G41400-SA-193-B7-Class:-Size:<=64 Allowable operatg stress Allowable stallation stress Consider bolt factor B SC 2-6(7)? Required operation bolt load Eq.(1) Mimum itial bolt load Eq.(2) Available cross section of bolts Required cross section W m1 /S b Required cross section W m2 /S a n d K a S b S a (N=No) W m1 W m2 A b A m1 A m2 Y mm mm (Y/N) N N mm² mm² mm² Req. bolt load for gasket seatg Allowable bolt load (A m +A b ) S a /2 A b S a W W all N N (5) Design (gasket seatg =1; max. allowable=2) 1 (1,2) Moment M D = H D h D M G = H G h G M T = H T h T = = = Force Lever arm = Result N mm = 5.537e+7 Nmm N mm = 1.209e+7 Nmm N mm = Nmm Total operatg moment = M D + M G + M T = Total gasket seatg moment, Eq. (6) = W (C-G)/2 = M 01 M e e+8 Nmm Nmm Stress Operation Installation Allowable Longitudal S H S f (8) Ratio S H /S f S f Allowable stress Radial S R S f (9) Tangential S T S f (10) Combation (S H +S R )/2 = S f Combation (S H +S T )/2 = S f B S B Smax Bolt pitch mm mm = (3) Remark Lauterbach Verfahrenstechnik GmbH

13 Auxiliary values (Fig ) (Fig ) (Fig ) (Fig ) (Fig ) (Fig ) Eq.(1) Eq.(2) Bolt pitch (3) Lauterbach Verfahrenstechnik GmbH

14 For (7) KL (=0.2 acc. Table 2-14) = 0.2 J = V [M 01 or M 02 ]/L/[E or E 20C ]/(g 0 -c 2 )²/K L /h 0 = [ 7.714e+7 or 1.046e+8 ]/ / /[ or ]/( )²/ 0.2 / Rigidity criterion: J Lauterbach Verfahrenstechnik GmbH

15 Appendix: Material documentation Section 2: Flansch/AFL Section 3: Flansch/AFL Material specification: Regulation: ASMET1A:2015Spec. No.: SA-105 Product: Forggs Material code: K03504-SA-105--Class:-Size: Short name: Carbon steel Design conditions and dimensions: Temperature [ C]: 343,3333 Pressure [bar]: 9,31 Thickness [mm]: 2 Outside diameter [mm]: 0 Material values for test and design conditions: Test condition Operatg condition Nomal design strength []: 138,00 122,80 Safety factor: 1,00 1,00 Allowable stress []: 138,00 122,80 Modulus of elasticity [k]: ,6667 Notes: G10 General Requirements Upon prolonged exposure to temperatures above 425 C, the carbide phase of carbon steel may be converted to graphite. See Nonmandatory Appendix A, A 201 and A 202. S1 Size Requirements For Section I applications, stress values at temperatures of 450 C and above are permissible but, except for tubular products 75 mm O.D. or less enclosed with the boiler settg, use of these materials at these temperatures is not current practice. T2 Time-Dependent Properties Allowable stresses for temperatures of 400 C and above are values obtaed from time dependent properties. -- Creep rupture strength for h [MPa]: Tensile strength and yield stress at ambient temperature: Diam./ Tensile str. ReH Rupture Rupture Thick. Rm m Rm max elong. elong <= mm MPa MPa MPa längs % quer % K-values as function of the temperature Diam./ Thickn. 50 C 100 C 150 C 200 C 250 C 300 C 350 C 400 C <= mm MPa MPa MPa MPa MPa MPa MPa MPa K-values as function of the temperature Diam./ Thickn. 450 C 500 C 550 C 600 C 650 C 700 C 800 C <= mm MPa MPa MPa MPa MPa MPa MPa Lauterbach Verfahrenstechnik GmbH

16 Modulus of elasticity dependence of the temperature: Static modulus of elasticity [k] at the temperature of Coefficient of lear expansion: Thermal coefficient of expansion between 20 C and Density 100 C 200 C 300 C 400 C 500 C 600 C 700 C 800 C Heat Heat (20 C) cond. capac. kg/dm³ 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K W/Km J/kgK ,85 12,1 12,7 13,3 13,8 14, Section 2: Schraube/AFL Section 3: Schraube/AFL Material specification: Regulation: ASMET3:2010Spec. No.: SA-193 Product: Boltg Material code: G41400-SA-193-B7-Class:-Size:<=64 Short name: 1Cr-0.2Mo Design conditions and dimensions: Temperature [ C]: 343,3333 Pressure [bar]: 9,30798 Thickness [mm]: 2 Outside diameter [mm]: 0 Material values for test and design conditions: Test condition Operatg condition Nomal design strength []: 172,00 172,00 Safety factor: 1,00 1,00 Allowable stress []: 172,00 172,00 Modulus of elasticity [k]: ,4 Notes: -- Creep rupture strength for h [MPa]: Tensile strength and yield stress at ambient temperature: Diam./ Tensile str. ReH Rupture Rupture Thick. Rm m Rm max elong. elong <= mm MPa MPa MPa längs % quer % K-values as function of the temperature Diam./ Thickn. 50 C 100 C 150 C 200 C 250 C 300 C 350 C 400 C <= mm MPa MPa MPa MPa MPa MPa MPa MPa K-values as function of the temperature Diam./ Thickn. 450 C 500 C 550 C 600 C 650 C 700 C 800 C <= mm MPa MPa MPa MPa MPa MPa MPa Lauterbach Verfahrenstechnik GmbH

17 Modulus of elasticity dependence of the temperature: Static modulus of elasticity [k] at the temperature of Static modulus of elasticity [k] at the temperature of Coefficient of lear expansion: Thermal coefficient of expansion between 20 C and Density 100 C 200 C 300 C 400 C 500 C 600 C 700 C 800 C Heat Heat (20 C) cond. capac. kg/dm³ 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K 10E-6/K W/Km J/kgK ,85 12,1 12,7 13,3 13,8 14, Lauterbach Verfahrenstechnik GmbH