標準號：BS 1868-1975+A1-1990
中文標準名稱：石油、石化及聯合工業用鋼制止回閥(有法蘭及對焊端)用規范
英文標準名稱：Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
標準類型：J16
發布日期：1975/11/28 12:00:00
實施日期：1975/11/28 12:00:00
中國標準分類號：J16
國際標準分類號：75.180.99
適用范圍：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.