JB/T 53333-1999
Powder Hot Forged Floating Oil Seal Ring - Product Quality Grading
粉末热锻浮动油封密封环 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量分等 → 4 质量指标 → 5 检查规则 Foreword → 1 Scope → 2 Normative References → 3 Quality Grading → 4 Quality Indicators → 5 Inspection Rules
Scope
This standard specifies the product quality grading indicators and quality grade evaluation methods for powder hot forged floating oil seal rings. This standard is the basis for measuring the product quality grade level of powder hot forged floating oil seal rings in enterprises, assessing product quality, and product grading. This standard applies to powder hot forged floating oil seal rings, and other floating oil seal rings may also refer to it.
本标准规定了粉末热锻浮动油封密封环的产品质量分等指标及质量等级评定方法。本标准是衡量企业粉末热锻浮动油封密封环产品质量等级水平、考核产品质量和产品分等定级的依据。本标准适用于粉末热锻浮动油封密封环，其它浮动油封密封环也可参照使用。
Normative References
Keywords
Application Summary AI generated
Manufacturers of powder hot forged floating oil seal rings use this standard to grade their products into qualified, first-grade, and premium levels. Quality inspection departments and customers rely on this standard for sampling inspection and acceptance, ensuring key indicators like sealing performance, hardness, and microstructure meet requirements. This standard is critical for ensuring the reliability and service life of floating oil seal rings in mechanical sealing applications.
粉末热锻浮动油封密封环的生产企业使用该标准来评定其产品的质量等级，分为合格品、一等品和优等品。质检部门和用户依据本标准对产品进行抽样检查和验收，确保密封环的密封性、硬度、金相组织等关键指标达标。该标准对于保证浮动油封密封环在机械密封中的可靠性和寿命至关重要。
AI Summary AI generated
This standard JB/T 53333-1999 specifies the product quality grading indicators and evaluation methods for powder hot forged floating oil seal rings, applicable to quality grade classification of such seal rings. It divides products into three grades: qualified, first-grade, and premium. Key indicators include working surface sealing (no leakage in 10 minutes), hardness (HRC 60-72), carburized layer thickness (≥0.8mm), and bench life (≥4000-5000 hours). Inspection rules follow the counting sampling plan of GB/T 2828, with classification into A, B, and C nonconformities. This standard replaces JB/T 53333-1994, with main revisions to sealing requirements, carburized layer thickness, hardness range, and sampling method.
本标准JB/T 53333-1999规定了粉末热锻浮动油封密封环的产品质量分等指标及评定方法，适用于该类密封环的质量等级划分。标准将产品分为合格品、一等品和优等品三个等级，主要考核指标包括工作面密封性（10分钟不渗漏）、硬度（HRC 60-72）、渗碳层厚度（≥0.8mm）、台架寿命（≥4000-5000小时）等。检查规则采用GB/T 2828的计数抽样方案，按A类、B类、C类不合格分类进行判定。该标准替代了JB/T 53333-1994，主要修订了密封性要求、渗碳层厚度、硬度范围和抽样方法。
Key Sentences extracted from text
本标准规定了粉末热锻浮动油封密封环的产品质量分等指标及质量等级评定方法。
产品的质量分等根据其技术水平和质量水平分为合格品、一等品和优等品三个等级。
工作面密封性10 min 不渗漏。
工作面硬度HRC 合格品≥60~63、一等品≥63~65、优等品≥65~72。
按GB/T 2828 规定的正常一次抽样方案和一般检查水平Ⅱ，检查批N为26~50件。
This standard specifies the product quality grading indicators and quality grade evaluation methods for powder hot forged floating oil seal rings.
The product quality grading is divided into three grades: qualified product, first-grade product, and premium product, based on technical level and quality level.
Working surface sealing: no leakage within 10 minutes.
Working surface hardness HRC: qualified product ≥60~63, first-grade product ≥63~65, premium product ≥65~72.
According to the normal single sampling plan and general inspection level II specified in GB/T 2828, the inspection lot N is 26 to 50 pieces.
Standard Timeline
Changes from replaced version:
- 工作台密封性统一修改为10 min 不渗漏
- 渗碳层厚度均修改为≥0.8 mm
- 工作面硬度HRC 由原来的合格品≥62、一等品≥63、优等品待定，修订为合格品≥60~63、一等品≥63~65、优等品≥65~72
- 由原来的百分比抽样修改为按GB/T 2828—1987 的计数抽样
- Working surface sealing uniformly revised to no leakage within 10 minutes
- Carburized layer thickness revised to ≥0.8 mm
- Working surface hardness HRC revised from original qualified product ≥62, first-grade ≥63, premium undetermined, to qualified product ≥60~63, first-grade ≥63~65, premium ≥65~72
- Changed from original percentage sampling to counting sampling according to GB/T 2828-1987