JB/T 51242-1999
Submersible motor-pumps for agricultural sewage and waste water - Product quality grading (Internal use)
农用污水污物潜水电泵 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 submersible motor-pumps for agricultural sewage and waste water. This standard applies to submersible motor-pumps for agricultural sewage and waste water (hereinafter referred to as motor-pumps).
本标准规定了农用污水污物潜水电泵产品的质量等级指标、试验方法和检验规则。本标准适用于农用污水污物潜水电泵（以下简称电泵）。
Normative References
Keywords
Application Summary AI generated
Manufacturers and testing organizations of submersible motor-pumps for agricultural sewage and waste water use this standard to assess product quality grades. They classify motor-pumps into qualified, first-grade, and superior grades based on the specified indicators and test methods, and follow the inspection rules. This standard is crucial for ensuring the quality and reliability of these motor-pumps.
农用污水污物潜水电泵的制造商和检测机构使用本标准来评定产品的质量等级。他们依据本标准规定的指标和试验方法，对电泵进行分等（合格品、一等品、优等品），并执行相应的检验规则。本标准对于确保农用污水污物潜水电泵的质量和可靠性至关重要。
AI Summary AI generated
This standard JB/T 51242-1999 specifies the quality grading requirements for submersible motor-pumps for agricultural sewage and waste water, classifying products into three grades: qualified, first-grade, and superior. It covers technical indicators such as efficiency, head, reliability, and safety requirements, and specifies corresponding test methods and sampling inspection rules based on GB/T 2828. This standard replaces the former JB/T 51242.1~51242.3-94, cancels some assessment items, and adjusts the nonconformity classification and sampling plan.
本标准JB/T 51242-1999规定了农用污水污物潜水电泵的质量分等要求，将产品分为合格品、一等品和优等品三个等级。标准涵盖了效率、扬程、可靠性、安全要求等多项技术指标，并规定了相应的试验方法和基于GB/T 2828的抽样检验规则。该标准替代了原JB/T 51242.1~51242.3-94，取消了部分考核项目，并调整了不合格分类和抽样方案。
Key Sentences extracted from text
本标准规定了农用污水污物潜水电泵产品的质量等级指标、试验方法和检验规则。
按电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。
电泵规定效率，合格品应符合JB/T 5118—1991 中第4章及表1 的规定，一等品的效率值应不小于合格品规定值加1%，优等品的效率值应不小于一等品规定值加4%。
电泵的平均首次故障前工作时间：干式、充油式电泵合格品为2000 h，一等品为2500 h，优等品为3000 h；对充水式电泵合格品为1000 h，一等品为1250 h，优等品为1500 h。
采用逐项考核，以表3 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, test methods and inspection rules for submersible motor-pumps for agricultural sewage and waste water.
According to the technical level and quality level of motor-pump products, they are divided into qualified product, first-grade product and superior product.
For the specified efficiency of the motor-pump, the qualified product shall comply with the provisions of Chapter 4 and Table 1 of JB/T 5118-1991, the efficiency value of the first-grade product shall not be less than the specified value of the qualified product plus 1%, and the efficiency value of the superior product shall not be less than the specified value of the first-grade product plus 4%.
The average time to first failure of the motor-pump: for dry-type and oil-filled motor-pumps, the qualified product is 2000 h, the first-grade product is 2500 h, and the superior product is 3000 h; for water-filled motor-pumps, the qualified product is 1000 h, the first-grade product is 1250 h, and the superior product is 1500 h.
Adopt item-by-item assessment, and take the lowest grade reached by each type of nonconformity in Table 3 as the product grade.
Standard Timeline
Changes from replaced version:
- 电泵的基本参数按JB/T 5118—1991的规定，取消了原标准中的表1
- 取消了“绕组匝间耐冲击电压试验”、“噪声”、“振动”、“密封装置”等考核项目
- 重新划分了不合格项目分类，并相应地调整了抽样方案
- The basic parameters of the motor-pump are according to JB/T 5118-1991, and Table 1 in the original standard is cancelled.
- Cancelled assessment items such as 'winding inter-turn impulse voltage test', 'noise', 'vibration', and 'sealing device'.
- Reclassified the nonconformity categories and adjusted the sampling plan accordingly.