JB/T 53265-1999
Pilot-operated Pressure Reducing Valves - Product Quality Grading
先导式减压阀 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 产品的质量等级 → 4 试验方法 → 5 抽样和评定方法 Foreword → 1 Scope → 2 Normative References → 3 Product Quality Grades → 4 Test Methods → 5 Sampling and Evaluation Methods
Scope
This standard specifies the product quality grades, test methods, sampling and evaluation methods for pilot-operated pressure reducing valves. This standard applies to pilot-operated pressure reducing valves with nominal pressure 1.0~6.4MPa, nominal diameter DN20~200mm, working temperature less than or equal to 400℃, and media of air, steam and water.
本标准规定了先导式减压阀的产品质量等级、试验方法、抽样和评定方法。本标准适用于公称压力1.0~6.4MPa，公称通径DN20~200mm，工作温度小于或等于400℃，介质为空气、蒸汽和水的先导式减压阀。
Normative References
Keywords
Application Summary AI generated
Valve manufacturers and quality inspection agencies use this standard to grade the quality of pilot-operated pressure reducing valves. It helps determine whether a product meets the requirements for qualified, first-class, or premium grade, guiding production control and factory inspection. The standard ensures reliability in shell strength, sealing performance, and service life through clear test methods and criteria.
阀门制造企业和质量检验机构使用该标准来对先导式减压阀进行质量等级评定。它帮助确定产品是否达到合格品、一等品或优等品的要求，从而指导生产控制和出厂检验。该标准通过明确的试验方法和指标，确保阀门在壳体强度、密封性能和寿命等方面的可靠性。
AI Summary AI generated
This standard specifies the product quality grading requirements for pilot-operated pressure reducing valves, including three grades: qualified, first-class, and premium. It covers assessment items such as shell test, seal test (static and dynamic), pressure characteristics, flow characteristics, life test, and internal cavity cleanliness, along with corresponding test methods and sampling evaluation rules. It applies to valves with nominal pressure 1.0~6.4MPa, diameter DN20~200mm, temperature up to 400℃, and media of air, steam, and water.
本标准规定了先导式减压阀的产品质量分等要求，包括合格品、一等品和优等品三个等级。标准涵盖了壳体试验、密封试验（静密封和动密封）、压力特性、流量特性、寿命试验及内腔清洁度等考核项目，并给出了相应的试验方法和抽样评定规则。适用于公称压力1.0~6.4MPa、通径DN20~200mm、温度不超过400℃的空气、蒸汽和水介质阀门。
Key Sentences extracted from text
本标准规定了先导式减压阀的产品质量等级、试验方法、抽样和评定方法。
先导式减压阀根据质量水平和使用价值分为合格品、一等品、优等品三个等级。
壳体试验的一等品和优等品的保压时间分别按持续时间的2倍和3倍。
静密封或动密封试验可任选一项。
合格品、一等品、优等品的检测结果应达到相应质量等级的规定，不允许再次抽样。
This standard specifies the product quality grades, test methods, sampling and evaluation methods for pilot-operated pressure reducing valves.
Pilot-operated pressure reducing valves are divided into three grades: qualified product, first-class product, and premium product, based on quality level and use value.
The holding time for shell test of first-class and premium products is 2 times and 3 times the duration, respectively.
Either static seal or dynamic seal test may be selected.
The test results for qualified, first-class, and premium products shall meet the requirements of the corresponding quality grade, and re-sampling is not allowed.
Standard Timeline
Changes from replaced version:
- 壳体试验的一等品和优等品的保压时间分别按持续时间的2倍和3倍
- 增加动密封试验要求
- 将软密封和硬密封的密封要求和寿命次数分别作规定
- The holding time for shell test of first-class and premium products is 2 times and 3 times the duration, respectively.
- Added dynamic seal test requirements.
- Separately specified the sealing requirements and life cycle counts for soft seal and metal seal.