This standard specifies the classification and labeling, requirements, test methods, inspection rules, marking, package and storage of marine bronze male thread stop valves (hereafter referred to as stop valves).
This standard is applicable to the design, manufacturing and acceptance of stop valve for marine pipeline system.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies.
GB/T 600 General Specifications for Marine Piping Valves and Fittings
GB/T 1176-1987 Specification for Cast Copper Alloys (ISO 1338:1977, NEQ)
GB/T 1184-1996 Geometrical Tolerancing - Geometrical Tolerances for Features without Individual Tolerance Indications (eqv ISO 2768-2:1989)
GB/T 1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions without Individual Tolerance Indications (eqv ISO 2768-1:1989)
GB/T 1958 Geometrical Product Specifications (GPS) - Geometrical Tolerance - Verification Prescription
GB/T 2059-2000 Strips of Copper and Copper Alloys
GB/T 3032 Marks for Marine Piping Valves and Fittings
GB/T 4423-1992 Copper Bars
CB*56 The Flat Shoulder Threaded Joints of Tube
GB/T 3589-1994 Non-asbestos Gaskets and Fillers for Marine Valves
3 Classification and Labeling
3.1 Type
Stop valves are classified into the following two types:
a) Type A - through-type stop valve;
b) Type B - perpendicular-type stop valve.
