What is the diameter of the smallest seamless steel pipe?

Answer; Small-bore seamless precision tubesIt is a special steel pipe with a high degree of accuracy and surface quality, and its diameter is usually in the range of less than 100 mm. This kind of steel pipe can meet the needs of various different industries, such as aviation, automotive, electronics, chemical and other fields.

Automobile manufacturing piping, military industry, engineering machinery, railway locomotives, aerospace, ships, injection molding machines, die-casting machines, machine tool processing, diesel engines, petrochemical industries, power stations, boiler equipment

Small-bore seamless precision tubesDue to the very high requirements of its manufacturing process, its ** is usually much higher than that of ordinary steel pipes. It is manufactured by drilling a hole in the center of the billet and then stretching and rolling it so that it tapers and forms a seamless pipe wall. This processing method can ensure that the wall thickness of the steel pipe is uniform, the size is stable, and the surface is smooth and the forming performance is good.

Small-bore seamless precision tubesIt is widely used in a variety of high-precision equipment, such as alloy manufacturing, instrumentation, antennas, sensors and pneumatic machinery. In areas such as aircraft and rocket manufacturing, the importance of this steel pipe is even more significant, as it can withstand high temperatures, pressures and complex mechanical loads, thus ensuring a high degree of reliability and safety of the equipment. Small-bore seamless precision tubesIt is a very important special steel pipe, because of its unique properties and uses, it plays an irreplaceable role in the field of modern high-tech.

The smallest is a small diameter seamless steel pipe with an inner 3mm and an outer 6mm.

According to the current technology, there are the following:

1. Inner and outer 14mm precision alloy seamless steel pipe.

2. 7mm inside and 16mm outside high-pressure alloy seamless steel pipe.

3. Inner and outer 14mm chromium-molybdenum alloy seamless steel pipe.

A steel pipe that is made of a single piece of metal and has no seams on the surface is called a seamless steel pipe.

According to the production method, seamless tubes.

It is divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe and pipe jacking. Wait.

Stainless steel pipe specifications:

1. According to the provisions of GB14975-94 "Stainless Steel Seamless Steel Pipe", the steel pipe is usually hot-rolled steel pipe (indefinite-length), and the hot-extruded steel pipe is equal to and greater than 1m. Cold-drawn (rolled) steel pipe wall thickness; The wall thickness is greater than.

2. There are 45 kinds of hot-rolled (hot-extruded) seamless steel pipes with a diameter of 54 480mm; There are 36 types of wall thicknesses. There are 65 kinds of cold-drawn (rolled) steel pipes with a diameter of 6 200mm; There are 39 types of wall thicknesses.

3. The allowable depth of the straight. Hot-rolled and hot-extruded steel pipes, with a diameter of less than or equal to 140mm, not more than 5% of the nominal wall thickness, and the maximum depth is not greater than; The cold-drawn (rolled) steel pipe is not more than 4% of the nominal wall thickness, and the maximum depth is not greater than.

Species of seamless steel pipesKind.

1. Seamless steel pipes can be divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes, etc. according to different production methods.

2. According to the shape classification, there are round pipes and special-shaped pipes. In addition to square pipes and rectangular tubes, special-shaped pipes also include elliptical tubes, semicircular tubes, triangular tubes, hexagonal tubes, convex tubes, plum blossom tubes, etc.

3. According to the different materials, it is divided into ordinary carbon structural pipes, low-alloy structural pipes, high-quality carbon structural pipes, alloy structural pipes, stainless pipes, etc.

4. According to special purposes, there are boiler tubes, geological tubes, oil tubes, etc.

The diameter and dimensions of seamless steel pipes are as follows:

1. According to the provisions of GB1497594 "Stainless Steel Seamless Steel Pipe", the length of the steel pipe is usually 10m, and the hot-extruded steel pipe is equal to and greater than 1m. The wall thickness of cold-drawn rolled steel pipe is up to 1mm to 7m; If the wall thickness is greater than 1mm, 8m.

2. There are 45 kinds of hot-rolled hot-extruded seamless steel pipes with diameters from 54 to 480mm; There are 36 types of wall thicknesses up to 45mm. There are 65 kinds of cold-drawn steel pipes with diameters from 6 to 200mm; There are 39 types of wall thicknesses up to 21mm.

3. The allowable depth of the straight. Hot-rolled and hot-extruded steel pipes, with a diameter of less than or equal to 140mm, not more than 5% of the nominal wall thickness, and a maximum depth of not more than mm; The cold-drawn steel pipe is not more than 4% of the nominal wall thickness, and the maximum depth is not more than mm.

Advantages of cold-rolled pipes

The main advantage of the key of cold-rolled seamless steel pipe is that the section reduction rate is large, especially the wall reduction ability is strong. For carbon steel, the section reduction rate can reach 80% to 83% in a single rolling, and 72% to 75% for alloy steel. Its main disadvantage is the difficulty of tool replacement.

In addition to the cold rolling method is directly used to produce a part of the cold rolled pipe with high precision, the imitation liquid is often used in combination with the cold drawing method to open the billet for cold drawing.

In this way, it can not only give full play to the wall reduction ability of cold rolling, but also make clever use of the advantages of easy replacement of cold drawing tools, which is conducive to improving productivity, expanding the production range of products and improving the surface quality of steel pipes.

Small-diameter seamless steel pipeIt is the most common type of seamless steel pipe, which is used to manufacture mechanical structures or hail sail hydraulic equipment, etc., which can save the processing time of mechanical type, greatly improve the utilization rate of materials, and help improve product quality. So what is a small diameter seamless steel pipe? What is the specification table of small diameter seamless steel pipe?

Below we have specially prepared detailed information for you, and you will come to watch.

What is a small diameter seamless steel pipe?

Seamless steel pipe with small outer diameter, we call it small-diameter seamless steel pipe. Generally, the outer diameter of the seamless steel pipe is less than 89mm and more than 4mm, which are collectively referred to as small-diameter seamless Buling steel pipes. Small-diameter seamless steel pipe is a small-diameter seamless steel pipe with high dimensional accuracy and good surface finish used for hydraulic equipment and mechanical structure.

What are the specifications of small-diameter seamless steel pipes?

Common specifications of small-diameter seamless steel pipes: the outer diameter is greater than 3mm and less than 42mm, everyone calls it small-diameter seamless steel pipe, because its diameter is relatively small. The wall thickness between 12mm can actually be divided into:

Small-diameter thick-walled seamless steel pipes, small-diameter thin-walled seamless steel pipes.

The formula for calculating the weight of small-diameter seamless steel pipes: [(outer diameter - wall thickness) * wall thickness] * meter (weight per meter).

Specification table of small-diameter seamless steel pipe:

The above is what is a small-diameter seamless steel pipe for you? The full contents of the specification sheet for small diameter seamless steel pipes.