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  • BSI
    BS 1868:1975+A1:1990 Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
    Edition: 2010
    $435.35
    / user per year

Description of BS 1868:1975+A1:1990 2010

This British Standard specifies requirements for cast or forged steel check valves with flanged or butt-welding ends of the following types:

  1. swing, for vertical or horizontal flow (see Figure 1);

  2. lift:

    1. piston type, for angle or horizontal flow (see Figure 2);

    2. ball type, for angle or horizontal flow (see Figure 3);

    3. ball type, for vertical flow (see Figure 4);

    4. 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 the purposes of this standard any line with a slope (upward or downward) of 5° or less is deemed to be horizontal. In the case of angle pattern valves the inlet should be vertical.



Nominal sizes, ratings, design, materials, marking and shipping for swing, piston, ball and disk valves for Class 150 up to Class 2500 and of nominal sizes 15 to 600 mm. Appendix for application to piping systems with BS 4504:Part 1.

Standard NumberBS 1868:1975+A1:1990
TitleSpecification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
StatusConfirmed
Publication Date2010-01-31
CorrectsBS 1868:1975
DescriptorsValve components, Bolts, Sealing rings, Butt joints, Seals, Piston valves, Flow regulators, Ball valves, Test duration, Welded joints, Dimensions, Gaskets, Petroleum technology, Steels, Liquid valves, Marking, Check valves, Flanged fittings, Valves
ICS75.180.99 Other equipment for petroleum and natural gas industries
CommitteePSE/18/2
ISBN978 0 580 70319 5
PublisherBSI
Pages28

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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