Pipe mould for centrifugal ductile iron pipe
1 Scope
This document specifies the specifications, structural types, dimensional tolerances, chemical composition, mechanical properties, macrostructure, metallographic structure, non-destructive testing, and dimensional accuracy of water-cooled and hot-mould coating metal pipe mould for centrifugal ductile iron pipes, and describes the corresponding test methods, inspection rules, marking, packaging, transportation, and storage.
This document is applicable to the design, manufacturing, and acceptance of pipe mould for centrifugal ductile iron pipes made from alloy steel as raw materials.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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 223.82 Steel and iron.Determination of hydrogen content - Thermal conductivity/infrared method after fusion under inert gas
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 229 Metallic materials - Charpy pendulum impact test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 1184-1996 Geometrical tolerancing - Geometrical tolerances for features without individual tolerance indications
GB/T 1804-2000 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 1979-2001 Standard diagrams for macrostructure and defect of structural steels
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T6394-2017 Determination of estimating the average grain size of metal
GB/T10561-2005 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams
GB/T 11261 Steel and iron - Determination of oxygen content - The pulse heating inert gas fusion-infra-red absorption method
GB/T 13295 Ductile iron pipes, fittings and accessories for water or gas applications
GB/T 13320 Metellographic grading atlas and assessing method for steel die forgings
GB/T 13384-2008 General specifications for packing of mechanical and electrical product
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method)
GB/T 37400.15-2019 Heavy mechanical general technical specification - Part 15:Nondestructive test of steel forgings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 13295 and the following apply.
3.1
pipe mould
mold for producing centrifugal ductile iron pipe
3.2
water cooled metal pipe mould
metal mold for centrifugal casting of iron pipes by non-wet coating and water cooling
3.3
preheated wet-coating metal pipe mould
metal mold for centrifugal casting of iron pipes by wet coating and water cooling
4 Specifications, structural types and dimensional tolerances
4.1 Specifications
4.1.1 The specifications of the pipe mould for centrifugal ductile iron pipes (hereinafter referred to as "the pipe mould") are based on the nominal diameter of the ductile iron pipes produced by it, expressed by the nominal diameter code "DN" and the numerical value representing the diameter of the iron pipe, in mm, and the expression form is as follows:
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Specifications, structural types and dimensional tolerances
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation and storage
Annex A (Normative)
Bibliography
