GB/T 16507.4-2013 Translated English of Chinese Standard. (GBT 16507.4-2013, GB/T16507.4-2013, GBT16507.4-2013): Water-tube boilers - Part 4: Strength calculation of pressure partsThis part of GB/T 16507 specifies the strength calculation of pressure parts used in water-tube boilers and the designed permissible stress of materials, and determines the method for verifying the maximum permissible working pressure of parts. This part is applicable to the pressure parts of water-tube boilers defined in GB/T 16507.1, including boiler drum, header drum, tube, pipeline within the range of boiler, convex head, flat lid and cover plate, tee joint and other non-rectangular components. |
Contents
| 3 | |
| 5 | |
| 6 | |
Permissible Stress | 7 |
Calculation Pressure | 9 |
Efficiency | 10 |
Component Thickness | 16 |
Required Thickness | 17 |
Methods for Verifying the Maximum Permissible Working Pressure of Component | 31 |
Additional Thicknesses | 37 |
Maximum Permissible Working Pressure | 38 |
Additional Stress Check | 42 |
Structural Constraint and Requirements | 44 |
Appendix A Normative Lowcycle Fatigue Life Calculation for Boiler Drum | 54 |
Appendix B Informative Method for Adopting the Designed Additional Pressure ΔPa | 63 |
Informative Adoption of Process Additional Thickness under General Conditions | 64 |
Opening Reinforcement | 24 |
Informative Approximation Algorithm for Elastic Section Modulus of Openingattenuation Section Wx1 | 66 |
Common terms and phrases
according to Formula adjacent openings arc length axial axial stress bending stress boiler drum calculated according calculated wall temperature calculation pressure check section circumferential connection tube convection pass convex head cover plate diameter of drum drum is calculated effective thickness elasticity modulus equal-diameter Y-tube equivalent diameter external walls flat lid flue forged main tube forged tee GB/T heat conductivity coefficient hot-extruded drum tee hot-extruded straight tee hot-extruded tee hydrostatic test internal pressure ligament efficiency maximum permissible diameter minimum required thickness nominal thickness opening diameter outer diameter peripheral temperature difference permissible working pressure radial temperature difference rated pressure shape coefficient specified in Table straight drum stress component caused stress concentration structural characteristic coefficient tee and equal-diameter tee branch thermal insulation thermal stress thickness of drum transition zone tube of tee tube or elbow un-reinforced opening Water-tube Boilers weld efficiency welded and forged welded tee Y-tube or convex