JB/T 51129-1999
Internal Combustion Engines - Condenser Radiators - Product Quality Grading (Internal Use)
内燃机 冷凝式散热器 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量指标 → 4 试验方法 → 5 检验规则 Foreword → 1 Scope → 2 Normative References → 3 Quality Indicators → 4 Test Methods → 5 Inspection Rules
Scope
This standard specifies the quality indicators, test methods and inspection rules for two grades of internal combustion engine condenser radiators (hereinafter referred to as condensers): qualified product and first-class product. This standard applies to the evaluation of product quality grades of condensers.
本标准规定了内燃机冷凝式散热器（以下简称冷凝器）合格品和一等品两个等级的质量指标，试验方法和检验规则。本标准适用于冷凝器产品质量等级的评定。
Normative References
Keywords
Application Summary AI generated
Manufacturers of internal combustion engines and condenser radiators use this standard to grade product quality. They apply the specified quality indicators, test methods, and inspection rules to classify products as qualified or first-class. This standard is crucial for ensuring the reliability and consistency of condenser radiator performance.
内燃机制造商和冷凝式散热器生产厂家使用本标准来评定产品的质量等级。他们依据本标准中的质量指标、试验方法和检验规则，将产品划分为合格品或一等品。本标准对于确保内燃机冷凝式散热器的性能可靠性和一致性至关重要。
AI Summary AI generated
This standard JB/T 51129-1999 specifies technical requirements for product quality grading of internal combustion engine condenser radiators, classifying products into two grades: qualified and first-class. It details 19 quality indicators including assembly dimensions, fin deviation, air tightness, and heat dissipation performance, along with corresponding test methods and inspection rules. Inspection uses sampling plans with nonconformity classification (Classes A, B, C) and acceptable quality levels (AQL). The standard applies to evaluating condenser product quality grades, providing a unified quality assessment basis for manufacturers and users.
本标准JB/T 51129-1999规定了内燃机冷凝式散热器产品质量分等的技术要求，将产品分为合格品和一等品两个等级。标准详细列出了19项质量指标，包括装配尺寸、散热片偏差、气密性能、散热性能等，并规定了相应的试验方法和检验规则。检验采用抽样方案，根据不合格项目分类（A、B、C三类）和合格质量水平（AQL）进行判定。该标准适用于冷凝器产品质量等级的评定，为生产厂家和用户提供了统一的质量评价依据。
Key Sentences extracted from text
本标准规定了内燃机冷凝式散热器（以下简称冷凝器）合格品和一等品两个等级的质量指标，试验方法和检验规则。
冷凝器产品按其质量指标的不同，定为合格品与一等品两个等级。
A类不合格项目对产品实用性能有重大影响，应予严格控制；B 类为对产品有较大影响的项目；C 类对产品仅有轻微影响。
样本经全数检查后，当样本中各类的不合格项目数均小于或等于一等品的Ac 值时，评被检产品为一等品。
如产品被评为不合格品，允许半年以后再补查一次。
This standard specifies the quality indicators, test methods and inspection rules for two grades of internal combustion engine condenser radiators (hereinafter referred to as condensers): qualified product and first-class product.
Condenser products are classified into two grades, qualified product and first-class product, according to their quality indicators.
Class A nonconforming items have a major impact on product practical performance and should be strictly controlled; Class B items have a relatively large impact on the product; Class C items have only a slight impact on the product.
After complete inspection of the sample, when the number of nonconforming items in each class in the sample is less than or equal to the Ac value for first-class product, the inspected product is rated as first-class product.
If the product is rated as nonconforming, a re-inspection is allowed after half a year.
Standard Timeline
Changes from replaced version:
- 按JB/T 6726-1993规定，仅对闭式冷凝器作出相应的规定
- 去除'焊合率'及'散热片参差'的要求
- 调整或补充散热片、水管、外观质量及通流性能的具体要求
- 简化不合格项目分类，并相应地调整抽样方案
- According to JB/T 6726-1993, only corresponding provisions for closed condensers are made
- Removed requirements for 'weld ratio' and 'fin irregularity'
- Adjusted or supplemented specific requirements for fins, water tubes, appearance quality, and flow performance
- Simplified classification of nonconforming items and correspondingly adjusted the sampling plan