This standard specifies terms and definitions, designation and parameters, structure, general requirements, requirements, test methods, inspection rules, marking, protection, packaging, storage and transportation of welded ball valve for urban heating.
This standard is applicable to welded ball valves (hereinafter referred to as "ball valves") with nominal dimension less than or equal to DN1600, nominal pressure less than or equal to PN25, service temperature of 0°C to 180°C and using water as the medium.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 150.1 Pressure vessels - Part 1: General requirements
GB/T 150.3 Pressure vessels - Part 3: Design
GB/T 150.4 Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance
GB/T 223 (all parts) Methods for chemical analysis of iron, steel and alloy
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 713 Steel plates for boilers and pressure vessels
GB/T 985.1 Recommended joint preparation for gas welding, manual metal arc welding, gas-shield arc welding and beam welding
GB/T 985.2 Recommended joint preparation for submerged arc welding
GB/T 1047 Pipework components - Definition and selection of DN (nominal size)
GB/T 1048 Pipework components - Definition and selection of PN (nominal pressure)
GB/T 1220 Stainless steel bars
GB/T 3077 Alloy structure steels
GB/T 3091 Welded steel pipes for low pressure liquid delivery
GB/T 3274 Hot-rolled plates, sheets and strips of carbon structural steels and high strength low alloy structural steels
GB/T 4237 Hot rolled stainless steel plate, sheet and strip
GB/T 7306.2 Pipe threads with 55-degree thread angle where pressure-tight joints are made on the threads - Part 2: Taper internal and external threads
GB/T 14976 Seamless stainless steel pipes for fluid transport
GB/T 30308 Fluoroelastomers - General specification and procedure of evaluation
GB 50235-2010 Code for construction of industrial metallic piping engineering
JB/T 106 Valves marking and paint
NB/T 47008 Carbon and alloy steel forgings for pressure equipment
NB/T 47010 Stainless and heat-resisting steel forgings for pressure equipments
NB/T 47013.2-2015 Non-destructive testing of pressure equipments - Part 2: Radiographic testing
NB/T 47013.3-2015 Nondestructive testing of pressure equipments - Part 3: Ultrasonic testing
NB/T 47013.5-2015 Nondestructive testing of pressure equipments - Part 5: Penetrant testing
NB/T 47014 Welding procedure qualification for pressure equipment
QB/T 3625 Polytetrafluoroethylene sheet
QB/T 4041 Polytetrafluoroethylene rod
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
fully welded body ball valve
ball valve with the body formed through one pass or more passes of weld
3.2
full-port ball valve
ball valve in which any bore diameter is the same as the pipe bore diameter
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Designation and parameters 5 Construction 6 General requirements 7 Requirements 8 Test methods 9 Inspection rules 10 Marking 11 Protection, packaging, storage and transportation Annex A (Normative) Sleeve Annex B (Normative) Axial force and bending moment values Annex C (Normative) Bending moment test method
