JB/T 51185-1999
Volute Mixed-Flow Pump - Product Quality Grading (Internal Use)
蜗壳式混流泵 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量等级指标 → 4 试验方法 → 5 检验规则 Foreword → 1 Scope → 2 Normative References → 3 Quality Grade Indicators → 4 Test Methods → 5 Inspection Rules
Scope
This standard specifies the quality grade indicators, test methods, and inspection rules for volute mixed-flow pump products. This standard applies to volute mixed-flow pumps.
本标准规定了蜗壳式混流泵产品的质量等级指标、试验方法、检验规则。本标准适用于蜗壳式混流泵。
Normative References
Keywords
Application Summary AI generated
Manufacturers and quality inspection agencies of volute mixed-flow pumps use this standard to grade and inspect product quality. It helps determine whether a product meets the levels of qualified, first-class, or superior product, thereby ensuring product quality and reliability. This standard is important for regulating the market and enhancing product competitiveness.
蜗壳式混流泵的制造商和质检机构使用本标准来对产品进行质量分等和检验。它帮助确定产品是否达到合格品、一等品或优等品等级，从而确保产品质量和可靠性。该标准对于规范市场、提升产品竞争力具有重要意义。
AI Summary AI generated
This standard specifies quality grade indicators, test methods, and inspection rules for volute mixed-flow pumps. Products are classified into qualified, first-class, and superior grades based on quality level. Assessment items include flow rate, head, efficiency, NPSH, noise, vibration, safety requirements, reliability, static balance, hydrostatic strength, assembly quality, paint coating quality, and marking/packaging/storage. Test methods cover performance tests, reliability tests, balance tests, and hydrostatic tests. Inspection rules adopt the GB/T 2828 sampling plan, with nonconformities classified into A, B, and C categories for judgment.
本标准规定了蜗壳式混流泵的质量等级指标、试验方法和检验规则。产品按质量水平分为合格品、一等品和优等品，考核项目包括流量、扬程、效率、汽蚀余量、噪声、振动、安全要求、可靠性、静平衡、水压强度、装配质量、油漆涂层质量及标志包装贮存等。试验方法涵盖性能试验、可靠性试验、平衡试验和水压试验等。检验规则采用GB/T 2828抽样方案，按A、B、C三类不合格进行判定。
Key Sentences extracted from text
蜗壳式混流泵产品应按经规定程序批准的产品图样和技术文件制造，并符合有关标准的规定。
按蜗壳式混流泵产品的技术水平和质量水平，分为合格品、一等品和优等品。
蜗壳式混流泵规定性能点的流量、扬程应符合JB/T 6667.1—1993 中表1 的规定，合格品的偏差应符合GB/T 3216—1989 中C 级的规定，一等品和优等品的偏差应符合GB/T 3216—1989 中B 级的规定。
蜗壳式混流泵产品的平均首次故障前工作时间：合格品应不少于1500 h，一等品不少于2500 h，优等品不少于3500 h。
采用逐项考核，以表1 中各类不合格达到的最低等级为产品等级。
Volute mixed-flow pump products shall be manufactured in accordance with product drawings and technical documents approved through specified procedures, and shall comply with the requirements of relevant standards.
According to the technical level and quality level of volute mixed-flow pump products, they are divided into qualified product, first-class product, and superior product.
The flow rate and head at the specified performance point of the volute mixed-flow pump shall comply with the provisions of Table 1 in JB/T 6667.1-1993; the deviation for qualified products shall comply with Grade C of GB/T 3216-1989, and the deviation for first-class and superior products shall comply with Grade B of GB/T 3216-1989.
The average time before first failure of volute mixed-flow pump products: qualified product shall be not less than 1500 h, first-class product not less than 2500 h, and superior product not less than 3500 h.
Adopt item-by-item assessment, with the lowest grade reached by various types of nonconformities in Table 1 as the product grade.
Standard Timeline
Changes from replaced version:
- 将原三项标准合并为一项
- 取消了原标准中的表1，型号及基本参数完全执行JB/T 6667.1-1993
- 取消了'泵轴轴承档精度和轴承体轴承档精度'两个考核项目
- 将'机组外观'改为'外观质量'和'涂层附着力'两项要求
- 增加了'安全要求'考核项目
- 可靠性指标改为'平均首次故障前工作时间'
- 重新划分了不合格项目分类，并相应地调整了抽样方案
- Merged the original three standards into one
- Canceled Table 1 in the original standard; model and basic parameters fully comply with JB/T 6667.1-1993
- Canceled the two assessment items 'pump shaft bearing journal accuracy and bearing housing bearing journal accuracy'
- Changed 'unit appearance' to 'appearance quality' and 'coating adhesion' two requirements
- Added 'safety requirements' assessment item
- Changed reliability indicator to 'average time before first failure'
- Reclassified nonconformity categories and adjusted the sampling plan accordingly