JB/T 53243-1999
Product Quality Grading for Ductile Iron Castings for General Purpose Valves
通用阀门球墨铸铁件 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 产品质量等级 → 4 试验与检验方法 → 5 抽样和评定方法 Foreword → 1 Scope → 2 Normative References → 3 Product Quality Grades → 4 Test and Inspection Methods → 5 Sampling and Evaluation Methods
Scope
This standard specifies the quality grades, test methods, sampling and evaluation methods for ductile iron castings. This standard applies to ductile iron casting products (hereinafter referred to as castings) as specified in GB/T 12227.
本标准规定了球墨铸件的质量等级，试验方法，抽样和评定方法。 本标准适用于GB/T 12227 规定的球墨铸铁件产品（以下简称铸件）。
Normative References
Keywords
Application Summary AI generated
Valve manufacturers and quality inspection agencies use this standard to classify and inspect ductile iron castings. It helps determine whether castings meet qualified, first-grade, or premium product levels, ensuring reliability and consistency of valve products. This standard is important for improving product quality and market competitiveness in the valve industry.
阀门制造企业和质检机构使用本标准来对球墨铸铁件进行质量分级和检验。它帮助确定铸件是否达到合格品、一等品或优等品等级，从而确保阀门产品的可靠性和一致性。该标准对于提升阀门行业的产品质量和市场竞争力具有重要意义。
AI Summary AI generated
This standard JB/T 53243-1999 specifies product quality grading requirements for ductile iron castings used in general purpose valves, including three grades: qualified, first-grade, and premium. It covers assessment items such as mechanical properties, nodularity, chemical composition, dimensional tolerances, and surface roughness, along with corresponding test methods, sampling rules, and evaluation procedures. The standard applies to ductile iron castings produced according to GB/T 12227, aiming to improve product consistency and reliability through graded management.
本标准JB/T 53243-1999规定了通用阀门用球墨铸铁件的产品质量分等要求，包括合格品、一等品和优等品三个等级。标准涵盖了力学性能、球化率、化学成分、尺寸公差和表面粗糙度等考核项目，并明确了相应的试验方法、抽样规则和评定程序。该标准适用于按GB/T 12227生产的球墨铸铁件，旨在通过分级管理提升产品质量的一致性和可靠性。
Key Sentences extracted from text
本标准规定了球墨铸件的质量等级，试验方法，抽样和评定方法。
铸件根据其质量水平和使用价值分为合格品、一等品和优等品三个等级。
铸件除符合GB/T 12227 规定外，各等级的考核项目和指标要求还应符合表1 的规定。
合格品、一等品、优等品的检测结果应达到相应等级的规定，不允许再次抽样。
受检铸件每个被测尺寸应测三点，作为一个项次计算。
This standard specifies the quality grades, test methods, sampling and evaluation methods for ductile iron castings.
Castings are divided into three grades: qualified product, first-grade product, and premium product, based on their quality level and use value.
In addition to complying with GB/T 12227, the assessment items and indicator requirements for each grade shall also comply with the provisions of Table 1.
The test results for qualified product, first-grade product, and premium product shall meet the corresponding grade requirements, and re-sampling is not allowed.
Each measured dimension of the inspected casting shall be measured at three points, counted as one item.
Standard Timeline
Changes from replaced version:
- 对原标准作了编辑性修改，主要技术内容没有变化
- Editorial modifications were made to the original standard, with no changes to the main technical content.