1. Steel pipe product drawings
Drawings are the most basic technical data used in production and are also the basis for processing and inspection. Especially in the technical requirements of drawings, the quality level and specific requirements of raw materials, parts, and products are often stipulated, as well as whether non-destructive inspection is required, etc.

2. Steel pipe related standards
Manufacturing companies often have to implement relevant standards, such as corporate standards, industry standards, national standards, international standards, etc. These are guiding documents for product processing, and naturally are also guiding documents for the implementation of non-destructive testing. Specific standards, inspection objects, inspection methods, inspection scales, etc. are often specified in detail.

3. Steel pipe technical documents
Various technical documents issued by the product production process department, such as process procedures, inspection cards, product inspection reports, repair orders, etc. Sometimes it is necessary to add or change inspection requirements, etc.

4. Steel pipe ordering contract
The special inspection requirements and quality control clauses of certain products may sometimes be emphasized in detail in the order contract, which should attract special attention.