JB/T 54351-1999
Quality Grading of Injector Welding Torches and Cutting Torches (Internal Use)
射吸式焊炬、割炬 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 抽样评定方法 → 4 产品质量等级 → 5 试验方法 → 6 产品质量等级的确定 Foreword → 1 Scope → 2 Normative References → 3 Sampling Evaluation Method → 4 Product Quality Grades → 5 Test Methods → 6 Determination of Product Quality Grades
Scope
This standard specifies the quality grades, test methods, and sampling evaluation methods for injector welding torches and cutting torches. This standard applies to the factory inspection of injector welding torches and cutting torches, and serves as the basis for quality assessment by quality supervision departments at all levels.
本标准规定了射吸式焊炬、割炬产品的质量等级、试验方法和抽样评定方法。本标准适用于射吸式焊炬、割炬的出厂检验，并作为各级质量监督部门对产品质量考核的依据。
Normative References
Keywords
Application Summary AI generated
Manufacturers of welding and cutting torches use this standard for factory inspection to ensure product quality meets specified grades. Quality supervision departments rely on it for product assessment and grading. By defining clear defect classifications and sampling plans, the standard provides a unified basis for quality control.
焊炬和割炬的生产企业使用本标准进行出厂检验，确保产品质量符合等级要求。质量监督部门依据本标准对产品进行考核和分等。该标准通过明确的缺陷分类和抽样方案，为产品质量控制提供了统一依据。
AI Summary AI generated
This standard specifies the quality grading of injector welding torches and cutting torches, including quality grades, test methods, and sampling evaluation methods. Defects are classified into critical, major, and minor categories, with acceptable quality levels (AQL) assigned for different grades (qualified, first-class, premium). The sampling plan is based on GB/T 2828, using special inspection level S-3, with procedures for severity adjustment. Test methods cover key items such as gas tightness, flame shape, vacuum degree, and flashback resistance. The standard applies to factory inspection and quality supervision assessment.
本标准规定了射吸式焊炬和割炬的产品质量分等，包括质量等级、试验方法和抽样评定方法。标准将缺陷分为致命、重和轻三类，并针对不同等级（合格品、一等品、优等品）指定了合格质量水平（AQL）。抽样方案基于GB/T 2828，采用特殊检查水平S-3，并规定了严格性调整程序。试验方法涵盖气密性、火焰形状、真空度、抗回火性等关键项目。该标准适用于出厂检验和质量监督考核。
Key Sentences extracted from text
本标准规定了射吸式焊炬、割炬产品的质量等级、试验方法和抽样评定方法。
凡被检查的产品不符合标准规定均称为缺陷。
按各种缺陷对产品使用的影响程度分为致命缺陷、重缺陷和轻缺陷三类。
AQL 值必须在实施抽样检查前决定，不得在检查过程中变更。
在每批抽检的焊炬中，不允许存在致命缺陷。
This standard specifies the quality grades, test methods, and sampling evaluation methods for injector welding torches and cutting torches.
Any product that does not conform to the standard requirements during inspection is called a defect.
Defects are classified into three categories: critical defects, major defects, and minor defects, according to their impact on product use.
The AQL value must be determined before implementing sampling inspection and shall not be changed during the inspection process.
No critical defects are allowed in each batch of sampled welding torches.
Standard Timeline
Changes from replaced version:
- 对原标准作了编辑性修改，主要技术内容没有变化
- Editorial modifications were made to the original standard, with no changes to the main technical content.