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.
