This standard specifies strength calculation method, structure, material requirements and material permissible stress of pressure parts for watertube boiler; and also offers verification method for determining maximum permissible gauge pressure of parts.
This standard is applicable to pressure parts, whose rated pressure shall be no less than 0.10 MPa1), of fixed type water pipe steam boiler and fixed type water pipe hot water boiler hot-water boiler, such as: boiler barrel body, header tank body, pipes, pipes in range of boiler, convex head, flat-end cover, cover board and abnormal parts.
Foreword
1. Scope
2 Normative reference
3 Terms and definitions
4 General provisions
5 Material, permissible stress and design temperature
6 Boiler barrel body
7 Cylindrical header tank body
8 Pipe and conduit in range of boiler
9 Convex head
10 Flat-end cover and cover board
11 Reinforcement of pore
12 Odd component
13 Proof method for determining maximum permissible design pressure of component
Appendix A (Normative appendix) Calculation for boiler barrel's low cycle fatigue life
Appendix B (Informative appendix) Elementary permissible stress of overseas material under different design temperature
Appendix C (Informative appendix) Approximate calculation for W bending resistance section factor of open pore weaken cross section
