Seamless steel pipe with small outer diameter can be called small-diameter seamless steel pipe. Small-diameter seamless steel pipe can also be divided into: seamless small-diameter steel pipe and straight seam (also called welding) small-diameter seamless steel pipe

ASTM A106 seamless pipes are divided into two models: A106-A and A106-B. A106 seamless steel pipe for export is a steel pipe material commonly used at home and abroad, mainly used in construction, mechanical processing, electrical, petrochemical and other industries.

Smls pipe type is as follows:
1. Cast steel refers to a kind of steel casting produced by casting method. Cast steel is mainly used to manufacture parts with complex shapes that are difficult to forge or cut and form, but require high strength and plasticity.

There are 9 kinds of weling process of Chinese welded steel pipe:

What is wrought steel
Wrought steel material refers to product forms (forged, rolled, ring rolled, extruded…), while forging is a subset of wrought product form.

The materials of seamless pipe are: ordinary and high-quality carbon structural steel, low-alloy steel, alloy steel, stainless acid-resistant steel, etc.