Specification for marking seamless carbon steel pipes

In the relevant regulations, there are a series of regulations and requirements for the identification of seamless steel pipes. The specific requirements for marking are as follows:

1. The logo of the seamless steel pipe manufacturer should be eye-catching, firm, clear, standardized, and not easy to fade. Paints or inks used to mark stainless steel seamless steel pipes shall not contain metals or metal salts such as zinc, lead, and copper that are harmful to stainless steel seamless steel pipes.

2. The logo should at least include the following: the name and trademark of the seamless steel pipe manufacturer, product standard number, steel pipe grade, product specification and traceability identification number or telephone number. For precision seamless carbon steel pipes, the main performance indicators and dimensional accuracy levels can be improved.

3. The standard can be printed, stamped, rolled, printed, pasted imprints or listed, hang tags, etc. The supplier can hang one or more signs.

4. Steel pipes with an outer diameter of not less than 36mm should start at a distance of not less than 200mm from the end of the seamless steel pipe, and follow each marking method.

5. For low-pressure fluid seamless steel pipes, thin-walled seamless steel pipes, seamless steel pipes and other general-purpose seamless steel pipes, cross-section seamless steel pipes, and complex cross-section seamless steel pipes cannot be marked every time.

6. Pipe joints of seamless steel pipes for petroleum, natural gas, 3PE anti-corrosion, etc., should have the grade mark of seamless steel pipes.

7. In the case of container packaging, bracket welding packaging or thin-walled seamless steel pipe group. Containers, supports, and seamless steel pipes on the outer layer of thin-walled seamless steel pipes should be labeled or hang tags.

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