JB/T 53301-1999
Two-stage Water-ring Vacuum Pump - Product Quality Grading (Internal Use)
两级水环真空泵 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 试验与检验方法 → 5 抽样、评定方法 → 附录A Foreword → 1 Scope → 2 Normative References → 3 Product Quality Grades → 4 Test and Inspection Methods → 5 Sampling and Evaluation Methods → Annex A
Scope
This standard specifies the quality grades, test and inspection methods, and sampling and evaluation methods for two-stage water-ring vacuum pump products. This standard is applicable to two-stage water-ring vacuum pumps for gas suction.
本标准规定了两级水环真空泵产品的质量等级、试验与检验方法和抽样、评定方法。本标准适用于抽吸气体的两级水环真空泵。
Normative References
Keywords
Application Summary AI generated
Manufacturers of two-stage water-ring vacuum pumps use this standard to classify their products into quality grades (qualified, first-class, premium). Quality inspection departments and customers rely on it for testing and evaluating pump performance. This standard promotes quality control and product improvement within the industry through a unified grading system.
两级水环真空泵的制造企业使用本标准来划分产品的质量等级（合格品、一等品、优等品）。质检部门和用户依据本标准对产品进行检验和评定，确保产品性能符合要求。该标准通过统一的质量分等体系，促进了行业内的质量控制和产品改进。
AI Summary AI generated
This standard JB/T 53301－1999 specifies quality grading requirements for two-stage water-ring vacuum pumps used for gas suction, including three grades: qualified, first-class, and premium. It details key assessment items (e.g., maximum gas flow, ultimate vacuum, oil leakage, cleanliness) and their technical requirements, as well as performance indicators for each grade such as gas flow, efficiency, vibration, and noise. Test and inspection methods, sampling, and evaluation procedures are also provided, making it applicable for quality control and product acceptance by manufacturers.
本标准JB/T 53301－1999规定了抽吸气体的两级水环真空泵产品的质量分等要求，包括合格品、一等品和优等品三个等级。标准详细列出了主要考核项目（如最大气量、极限真空度、润滑油渗漏、清洁度等）及其技术要求，以及各等级对应的气量、效率、振动、噪声等性能指标。同时规定了试验与检验方法、抽样和评定方法，适用于制造企业的质量控制和产品验收。
Key Sentences extracted from text
产品根据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。
产品应符合JB/T 7255 的规定，其中主要考核项目及要求应符合表1 的规定，评定产品质量等级的考核项目、指标和要求应符合表2 的规定。
批量产品应首先进行单个产品的质量等级评定，判定单个产品的质量等级应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。
采取全数检查方法时，当所有产品达到合格品时，该批产品才能评为合格品；当达到一等品或优等品的数量占总数70%以上，且其余产品达到合格品时，该批产品才能评为一等品或优等品。
采取抽样检查方法时，可按JB/T 8687 规定的合格判定数Ac（或A1、A2）和不合格判定数Re（或R1、R2）评定该批产品达到某一等级（合格品、一等品或优等品）。
Products are classified into three grades: qualified product, first-class product, and premium product, based on quality level and use value.
Products shall comply with the provisions of JB/T 7255, with the main assessment items and requirements conforming to Table 1, and the assessment items, indicators, and requirements for determining product quality grades conforming to Table 2.
For batch products, the quality grade of individual products shall first be assessed; the quality grade of an individual product shall meet all assessment item requirements of that grade, otherwise it shall be graded according to the lowest indicator achieved.
When using full inspection, the batch can only be rated as qualified if all products are qualified; if the number of first-class or premium products accounts for more than 70% of the total and the remaining products are qualified, the batch can be rated as first-class or premium.
When using sampling inspection, the batch can be assessed as reaching a certain grade (qualified, first-class, or premium) according to the acceptance number Ac (or A1, A2) and rejection number Re (or R1, R2) specified in JB/T 8687.
Standard Timeline
Changes from replaced version:
- 删除了“性能保持性”及“附录B 性能保持性计算”
- 将“极限真空度、润滑油渗漏、清洁度、泵用材料、涂漆和外观及包装”主要考核项目从表2中移出列入表1中
- 增加了“最大气量”一项列入表1中
- Deleted 'performance retention' and 'Annex B Performance Retention Calculation'
- Moved the main assessment items 'ultimate vacuum, oil leakage, cleanliness, pump materials, painting and appearance, and packaging' from Table 2 to Table 1
- Added 'maximum gas flow' as an item in Table 1