JB/T 53200-1999
Product Quality Grading for Wafer Type Knife Gate Valves
对夹式刀形闸阀 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 产品质量等级 → 4 试验方法 → 5 抽样和等级评定方法 Foreword → 1 Scope → 2 Normative References → 3 Product Quality Grades → 4 Test Methods → 5 Sampling and Grade Evaluation Methods
Scope
This standard specifies the quality grades, test methods, sampling, and grade evaluation methods for wafer type knife gate valve products. This standard applies to wafer type knife gate valves (referred to as knife gate valves) with nominal pressure PN ≤ 2.5 MPa and nominal diameter DN 50~700 mm.
本标准规定了对夹式刀形闸阀产品的质量等级、试验方法、抽样和等级评定方法。 本标准适用于公称压力PN≤2.5MPa，公称通径DN50~700mm 的对夹式刀形闸阀（简称刀形闸阀）。
Normative References
Keywords
Application Summary AI generated
Valve manufacturers and quality inspection agencies use this standard to classify and test wafer type knife gate valves into quality grades. It helps determine whether products meet qualified, first-class, or premium standards, guiding production control and factory inspection. By unifying test methods and evaluation rules, this standard ensures valve reliability and interchangeability, which is critical for the safe operation of industrial piping systems.
阀门制造企业和质量检验机构使用本标准来对夹式刀形闸阀进行质量等级划分和检测。它帮助确定产品是否达到合格品、一等品或优等品标准，从而指导生产控制和出厂检验。该标准通过统一试验方法和评定规则，确保阀门产品的可靠性和互换性，对工业管道系统的安全运行至关重要。
AI Summary AI generated
This standard JB/T 53200-1999 specifies quality grades, test methods, sampling, and evaluation rules for wafer type knife gate valves, applicable to products with PN ≤ 2.5 MPa and DN 50~700 mm. It classifies valves into three grades: qualified, first-class, and premium. Assessment items include shell test, seal test, static pressure life test, casting quality, and internal cavity cleanliness. Compared with the previous version, it revises shell test duration, refines seal test classification, and adds requirements for cleanliness and casting quality.
本标准JB/T 53200-1999规定了对夹式刀形闸阀的质量等级、试验方法、抽样和评定规则，适用于PN≤2.5MPa、DN50~700mm的产品。标准将阀门分为合格品、一等品和优等品三个等级，考核项目包括壳体试验、密封试验、静压寿命试验、铸件质量和内腔清洁度等。与旧版相比，修订了壳体试验持续时间，细化了密封试验分类，并增加了清洁度和铸件质量要求。
Key Sentences extracted from text
本标准规定了对夹式刀形闸阀产品的质量等级、试验方法、抽样和等级评定方法。
刀形闸阀根据质量水平和使用价值分为合格品、一等品和优等品三个等级。
壳体试验和密封试验按GB/T 13927 的规定。
静压寿命试验按JB/T 8858 的规定。
合格品、一等品和优等品的检测结果应达到相应等级质量指标的规定，不允许再次抽样。
This standard specifies the quality grades, test methods, sampling, and grade evaluation methods for wafer type knife gate valve products.
Knife gate valves are divided into three grades: qualified product, first-class product, and premium product, based on quality level and use value.
Shell test and seal test shall be carried out in accordance with GB/T 13927.
Static pressure life test shall be carried out in accordance with JB/T 8858.
The test results for qualified product, first-class product, and premium product shall meet the corresponding grade quality index requirements, and re-sampling is not allowed.
Standard Timeline
Changes from replaced version:
- 修改了壳体试验的持续时间
- 密封试验分为金属密封面刀形闸阀密封试验和非金属密封面刀形闸阀密封试验，相应增加了金属密封面刀形闸阀密封试验质量等级指标
- 静压寿命试验分为金属密封静压寿命试验和非金属密封静压寿命试验，增加了合格品的寿命试验次数
- 增加了阀门清洁度和铸件质量的考核
- Modified the duration of the shell test
- Seal test is divided into metal seal face knife gate valve seal test and non-metal seal face knife gate valve seal test, with corresponding addition of quality grade indicators for metal seal face knife gate valve seal test
- Static pressure life test is divided into metal seal static pressure life test and non-metal seal static pressure life test, with increased number of life test cycles for qualified products
- Added assessment of valve cleanliness and casting quality