1 Scope
This standard specifies structural types, parameters, technical requirements, test methods, inspection rules, marking, packaging, transport and storage of needle valves.
This standard is applicable to steel needle valves with a nominal pressure not greater than PN320 and a nominal dimension of DN2.5~DN25, and copper needle valves with a nominal pressure of PN16~PN25 and a nominal dimension of DN10~DN15. Needle valves with other parameters may be implemented by reference.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties to coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents applies. For undated references, the latest edition of the normative document referred to applies.
Foreword I
1 Scope
2 Normative References
3 Structural Types and Parameters
3.1 Structural Types
3.2 Parameters
4 Technical Specifications
4.1 Pressure-Temperature Ratings
4.2 Connection end of Valve Body
4.3 Valve Body and Valve Deck
4.4 Valve Seat
4.5 Valve Clack
4.6 Valve Stem
4.7 Packing Box and Packing
4.8 Hand Wheel
4.9 Shell Strength and Tightness
4.10 Cleanliness
4.11 Materials
5 Test Methods
6 Inspection Rules
6.1 Delivery Inspection
6.2 Type Inspection
6.3 Sampling Inspection
7 Marking, Packaging, Transportation and Storage
