BS 1868-1975+A1-1990 石油、石化及联合工业用钢制止回阀(有法兰及对焊端)用规范

标准号：BS 1868-1975+A1-1990
中文标准名称：石油、石化及联合工业用钢制止回阀(有法兰及对焊端)用规范
英文标准名称：Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
标准类型：J16
发布日期：1975/11/28 12:00:00
实施日期：1975/11/28 12:00:00
中国标准分类号：J16
国际标准分类号：75.180.99
适用范围：This British Standard specifies requirements for cast or forged steel check valves with flanged orbutt-welding ends of the following types:a) swing, for vertical or horizontal flow (see Figure 1);b) lift:i) piston type, for angle or horizontal flow (see Figure 2);ii) ball type, for angle or horizontal flow (see Figure 3);iii) ball type, for vertical flow (see Figure 4);iv) disk type, for vertical flow (see Figure 5).The terms “vertical”, “horizontal” and “angle” relate to the axes of the body ends.When swing check valves are used in vertical lines the flow must be in an upward direction. For thepurposes of this standard any line with a slope (upward or downward) of 5° or less is deemed to behorizontal. In the case of angle pattern valves the inlet should be vertical.