1. Product Drawings: Drawings are the most basic technical data used in production and serve as the basis for processing and inspection. Especially in the technical requirements of the drawings, the quality grades, specific requirements, and whether NDT is required for raw materials, parts, and products are often specified.
2. Relevant Standards: Manufacturing enterprises often implement relevant standards, such as enterprise standards, industry standards, national standards, and international standards. These are guiding documents for product processing and naturally also guiding documents for implementing NDT. Specific standards often specify in detail the inspection objects, inspection methods, inspection scale, etc.
3. Technical Documents: Various technical documents issued by the product manufacturing process department, such as process specifications, inspection cards, product inspection reports, rework orders, etc. Sometimes, additional or changed inspection requirements may be added.
4. Purchase Contracts: Special inspection requirements and quality control clauses for certain products may sometimes be emphasized in detail in the purchase contract and should be given special attention.