Meaning of seamless steel pipe steel stamp

Seamless steel pipe (SMLS) is an important material used for conveying fluids or for mechanical processing, and is commonly used in the fields of petroleum, natural gas, chemical industry, etc. Steel stamp refers to information such as text, numbers or graphics engraved on the surface of seamless steel pipe.

The steel stamp of seamless steel pipe usually contains the following information:

1. Manufacturer: the name, logo or trademark of the steel pipe manufacturer.
2. Product standard: the product standard that the steel pipe production complies with, such as GB/T, ASTM/ASME, API 5L, etc.
3. Production batch: the batch number to which the steel pipe belongs when it is produced.
4. Specifications and dimensions: the outer diameter, wall thickness, length and other specification and dimension information of the steel pipe.

5. Steel pipe brand: the material and steel grade information used for the steel pipe.

Position of seamless steel pipe steel stamp:
The steel stamp of seamless steel pipe is usually located at both ends or one side of the pipe, generally within 5%~10% of the wall thickness to avoid affecting the mechanical properties of the steel pipe. The position of the steel stamp should be clear and easy to identify.

1. Stamp position: Generally on the side of the seamless steel pipe, sometimes on the end or bottom of the pipe.
2. Stamp form: The form of seamless steel pipe stamp includes positive engraving and negative engraving. The positive engraving is to use the engraving template to engrave the words, numbers, etc. on the surface of the steel pipe; the negative engraving is to recess the words, numbers, etc. on the surface of the steel pipe.
3. Stamp font: Generally, Arabic numerals and English letters are used, and Chinese characters are also used in some cases.
4. Stamp color: Generally, the seamless steel pipe stamp is black, but some manufacturers may perform some processing on the surface of the stamp to make it present other colors, such as red, blue, etc.

How to identify the stamp of seamless steel pipe?
First, find the position of the stamp, which is generally at both ends or a random side of the seamless steel pipe. Then, according to the text or logo on the stamp, you can identify its manufacturer, specification size, production batch and other information. If you are not sure about the meaning of the text or logo on the stamp, you can refer to the relevant product standards or consult the manufacturer.

Conclusion: 

The steel stamp of seamless steel pipe is an important product quality mark, which can help users understand the manufacturer, specifications, dimensions, materials and other information of the steel pipe. Users need to understand the location and meaning of the steel stamp in order to correctly purchase and use seamless steel pipes. At the same time, manufacturers should also ensure that the steel stamp is clear and obvious to avoid unnecessary trouble for users.

Read more: Types of Seamless Carbon Steel Pipes or Seamless Pipe HS Code 7304