JB/T 53020-1999
Oil Diffusion Ejector Vacuum Pump - Product Quality Grading (Internal Use)
油扩散喷射真空泵 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 产品的质量等级 → 4 检验规则和评定方法 Foreword → 1 Scope → 2 Normative References → 3 Product Quality Grades → 4 Inspection Rules and Evaluation Methods
Scope
This standard specifies the quality grades, inspection rules and evaluation methods for oil diffusion ejector vacuum pumps. This standard applies to oil diffusion ejector vacuum pump products specified in JB/T 7265 (hereinafter referred to as products).
本标准规定了油扩散喷射真空泵的质量等级、检验规则和评定方法。本标准适用于JB/T 7265 规定的油扩散喷射真空泵产品（以下简称产品）。
Normative References
Keywords
Application Summary AI generated
Manufacturers, quality inspection agencies, and users of oil diffusion ejector vacuum pumps apply this standard to classify and evaluate product quality grades. It ensures consistent performance and comparability by defining specific criteria for qualified, first-class, and premium products, supporting procurement and quality control decisions.
该标准由真空泵制造企业、质量检验机构和用户使用，用于对油扩散喷射真空泵进行质量等级划分和检验评定。它通过明确合格品、一等品和优等品的具体指标，确保产品性能的一致性和可比性，为采购验收和质量管理提供依据。
AI Summary AI generated
This standard specifies quality grades (qualified, first-class, premium), inspection rules, and evaluation methods for oil diffusion ejector vacuum pumps covered by JB/T 7265. It defines assessment indicators such as ultimate pressure, critical backing pressure, pumping speed, heating time, and heating power. Inspection uses a single sampling plan with 2 units per batch and acceptance number 0. Grade determination requires meeting all requirements of the corresponding grade, and batch quality is based on the lowest grade among samples.
本标准规定了油扩散喷射真空泵的质量等级（合格品、一等品、优等品）、检验规则和评定方法。适用于JB/T 7265规定的产品。标准明确了极限压力、临界前级压力、抽气速率、加热时间和加热功率等考核指标，并采用一次抽样方案（每批2台，合格判定数为0）进行检验。判定时需满足该等级全部要求，批质量以样品中最低等级为准。
Key Sentences extracted from text
本标准规定了油扩散喷射真空泵的质量等级、检验规则和评定方法。
产品根据其质量水平和使用价值分为合格品、一等品和优等品。
判定产品的质量等级，必须符合该等级全部考核项目的要求，否则按达到的最低一项指标定等级。
批的质量等级以2 台样品中最低等级判定。
采用一次抽样方案，每批样本数为2 台，合格判定数为0。
This standard specifies the quality grades, inspection rules and evaluation methods for oil diffusion ejector vacuum pumps.
Products are classified into qualified products, first-class products and premium products according to their quality level and use value.
To determine the quality grade of a product, it must meet all the requirements of the assessment items for that grade; otherwise, the grade is determined by the lowest indicator achieved.
The quality grade of a batch is determined by the lowest grade among the two samples.
A single sampling plan is adopted, with a sample size of 2 units per batch and an acceptance number of 0.
Standard Timeline
Changes from replaced version:
- 修改了抽样方法
- 修改了合格品指标
- 将比加热功率指标改为加热功率指标
- Modified the sampling method
- Modified the qualified product indicators
- Changed the specific heating power indicator to heating power indicator