JB/T 51204-1999
Quality Grading for Long Shaft Centrifugal Deep Well Pumps (Internal Use)
长轴离心深井泵 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, testing methods, and inspection rules for long shaft centrifugal deep well pumps. This standard applies to long shaft centrifugal deep well pumps (hereinafter referred to as pump products).
本标准规定了长轴离心深井泵的质量等级指标、检测试验方法和检验规则。 本标准适用于长轴离心深井泵（以下简称泵产品）。
Normative References
Keywords
Application Summary AI generated
Manufacturers and quality inspection agencies of long shaft centrifugal deep well pumps use this standard to grade and inspect product quality. By defining indicators for qualified, first-class, and premium products, it helps users select pumps of appropriate quality levels. This standard is important for improving the safety and reliability of pump products.
长轴离心深井泵的制造商和质检机构使用本标准对产品进行质量分级和检验。通过设定合格品、一等品和优等品的指标，帮助用户选择合适等级的泵产品。该标准对提升泵产品的安全性和可靠性具有重要意义。
AI Summary AI generated
This standard specifies quality grade indicators, test methods, and inspection rules for long shaft centrifugal deep well pumps. Products are classified into qualified, first-class, and premium grades based on technical and quality levels. Assessment items include flow rate, head, efficiency, noise, vibration, safety requirements, mean time between failures, and shaft seal leakage. Test methods cover performance, hydrostatic, and reliability tests. Inspection rules follow GB/T 2828 sampling plans, with nonconformities categorized as A, B, or C types for determination.
本标准规定了长轴离心深井泵的质量等级指标、试验方法和检验规则。产品按质量分为合格品、一等品和优等品，考核项目包括流量、扬程、效率、噪声、振动、安全要求、平均无故障工作时间、轴封泄漏量等。试验方法涵盖性能试验、水压试验、可靠性试验等。检验规则采用GB/T 2828的抽样方案，按A、B、C三类不合格进行判定。
Key Sentences extracted from text
本标准规定了长轴离心深井泵的质量等级指标、检测试验方法和检验规则。
按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。
联轴器、带传动装置等的外露转动件应设置安全护罩或类似的防护装置。
平均无故障工作时间应在规定的试验条件下实测确定，试验样机至少2台。
采用逐项考核，以表4中各类不合格达到的最低等级为产品等级。
This standard specifies the quality grade indicators, testing methods, and inspection rules for long shaft centrifugal deep well pumps.
According to the technical level and quality level of pump products, they are divided into qualified products, first-class products, and premium products.
Exposed rotating parts such as couplings and belt drives shall be equipped with safety guards or similar protective devices.
The mean time between failures shall be determined by actual measurement under specified test conditions, with at least 2 test prototypes.
Adopt item-by-item assessment, and the product grade is determined by the lowest grade reached by each type of nonconformity in Table 4.
Standard Timeline
Changes from replaced version:
- 取消了“首次大修期”、“清洁度”和“泵用材料”等项目
- 增加了“安全要求”项目
- 重新划分了不合格项目分类，并相应地调整了抽样方案
- Cancelled items such as 'first overhaul period', 'cleanliness', and 'pump materials'
- Added 'safety requirements' item
- Reclassified nonconformity categories and adjusted the sampling plan accordingly