GB/T 1951-2008Marine low pressure bronze male threaded stop valves (English PDF)

1 Scope

This standard specifies the Marine low pressure bronze male threaded stop valve (hereinafter referred to as the cut-off valve) classification and marking requirements, test methods, inspection

Rules, packaging and storage.

This standard applies to water, fresh water, fuel, oil and temperature not higher than 250 °C steam ship line with shut-off valve design, manufacture and acceptance.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 600 marine piping valves General technical requirements

GB/T 1176-1987 Cast Copper Alloys conditions (neq ISO 1338. 1977)

GB/T 1184-1996 shape and position tolerances without individual tolerance value (eqv ISO 2768-2. 1989)

GB/T 1348-1988 ductile iron castings

GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance tolerance (eqv ISO 2768-1. 1989)

GB/T 1958 Geometrical Product Specifications (GPS) shape and position tolerance testing requirements

Flag GB/T 3032 Ship pipeline accessories

GB/T 4423-2007 Copper and copper alloy rod drawing

GB/T 5231-2001 processing of copper and copper alloy chemical composition and shape of the product

CB821 low pressure pipe nipple

CB/T 3927 Marine casting wall thickness of the valve member

3 Classification and Marking

Type 3.1

Off valve type specified as follows.

A Type --- straight shut-off valve;

Type B --- right angle stop valve.