Detail of GB/T 14383-2021

Introduction of GB/T 14383-2021

GB/T 14383-2021 Forged fittings, socket-welding and threaded 1 Scope This standard specifies the varieties and codes, pressure ratings, special connection forms, nozzle dimensions, order information, shapes, dimensions and tolerances, materials, manufacture, heat treatment, inspections and tests, marking, surface protection and packaging, and product quality certificate requirements for forged fittings, both socket-welding and threaded. This standard is applicable to socket-welding and threaded fittings forged of steel with nominal dimensions less than or equal to DN 100 and pressure ratings of (Class) 2,000, 3,000, 6,000, and 9,000 in piping systems. 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 222 Permissible tolerances for chemical composition of steel products GB/T 223 (All parts) Methods for chemical analysis of iron, steel and alloy GB/T 226 Test method for macrostructure and defect of steel by etching GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature GB/T 228.2 Metallic materials - Tensile testing - Part 2: Method of test at elevated temperature GB/T 229 Metallic materials - Charpy pendulum impact test method GB/T 231 (All parts) Metallic materials - Brinell hardness test GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing GB/T 4334 Corrosion of metals and alloys - Test methods for intergranular corrosion of austenitic and ferritic-austenitic (duplex) stainless steels GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 6394 Determination of estimating the average grain size of metal GB/T 9452 Testing method for working zone of heat treatment furnace GB/T 10561 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams GB/T 11170 Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 12716 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads GB/T 13305 Micrographic method for determining area content of the α-phases in stainless steels GB/T 13401 Steel buttwelding pipe fittings - Technical specification GB/T 17394 (All parts) Metallic materials - Leeb hardness test GB/T 17897 Corrosion of metals and alloys - Corrosion test for pitting corrosion resistance of stainless steels in the ferric chloride solution GB/T 18253-2018 Steel and steel products - Types of inspection documents GB/T 20801.2 Pressure piping code - Industrial piping - Part 2: Materials NB/T 47013.3 Nondestructive testing of pressure equipments - Part 3: Ultrasonic testing NB/T 47013.4 Nondestructive testing of pressure equipments - Part 4: Magnetic particle testing NB/T 47013.5 Nondestructive testing of pressure equipments - Part 5: Penetrant testing 3 Varieties and codes See Table 1 for varieties and codes of pipe fittings. Table 1 Varieties and codes of pipe fittings

Contents of GB/T 14383-2021

Foreword I 1 Scope 2 Normative references 3 Varieties and codes 4 Pressure ratings 5 Special connection forms 6 Nozzle dimensions 7 Order information 8 Shapes, dimensions and tolerances 9 Materials 10 Manufacture 11 Heat treatment 12 Inspection and test 13 Marking 14 Surface protection and packaging 15 Product quality certificate Annex A (Normative) Dimensions of steel pipes connected to pipe fittings Annex B (Normative) Additional requirements Annex C (Informative) Common raw materials for manufacturing pipe fittings Annex D (Informative) Summary table of inspection and testing Bibliography