BS 5352: Specification for Steel wedge gate, globe and check valves 50 mm and smaller for the

petroleum, petrochemical and allied industries

 

BS 5352 Standard specifies requirements for forged, cast or bar stock steel wedge gate, globe stop and check valves with flanged, screwed, socket-weld or butt-weld ends, in nominal sizes 50 mm (2 in) and smaller in classes 150, 300, 600, 800 and 1500 of the following types.

 

a) Wedge gate valves, with outside screw and yoke, rising stem, bolted or welded bonnet and bolted gland:

1) reduced bore, compact (class 800 only); and 800 only;

2)standard bore.

 

b) Wedge gate valves, with inside screw, rising stem and handwheel, bolted or welded bonnet and gland nut, for use at temperatures up to 425 °C only, and with screwed and socket-weld ends:

1) reduced bore, compact (class 800 only);

2) standard bore (class 1500 only).

 

c) Globe valves, including screw down check valves (straight angle or oblique pattern), outside screw and yoke, rising stem and handwheel, bolted or welded bonnet and bolted gland, plug or needle type disk:

1) reduced bore;

2) standard bore.

 

d) Globe valves, including screw down check valves (straight angle or oblique pattern), inside screw, rising stem and handwheel, bolted or welded bonnet, gland nut and plug or needle type disk, for use at temperatures up to 425 °C only:

1) reduced bore;

2) standard bore.

NOTE Screwed and socket-weld ends classes 800 and 1500 only.

 

e) Bellows-sealed valves:

1) wedge gate, with outside screw and yoke, rising stem, bolted or welded bonnet, screwed or bolted gland, and reduced bore (compact);

2)globe (straight angle or oblique pattern), with outside screw and yoke, rising stem, bolted or welded bonnet, screwed or bolted gland, plug or needle type disk, and reduced or standard bore.

 

f) Check valves, with bolted, welded or union cover:

1) piston type (for angle or horizontal flow);

2) ball type (for angle or horizontal flow);

3) ball type (for vertical flow).

NOTE The terms “vertical”, “horizontal” and “angle” relate to the axis of the body ends.

 

Pressure classification

This standard applies to valves of the following class ratings:

150; 300; 600; 800; 1500.

NOTE The number in these class ratings represents the primary service pressure rating of the valve in lbf/in 2

 

Nominal sizes

Valves of the following nominal sizes are specified in this standard:

DN8 (1/4 inch)

DN10 (3/8 inch)

DN15 (1/2 inch)

DN20 (3/4 inch)

DN25 (1 inch)

DN32 (1-1/4 inch)

DN40 (1-1/2 inch)

DN50 (2 inch)

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