Steel pipe material specification
Classification of steel pipes
1, classified by production mode
(1) Seamless Tube-Cold-drawn Tube, Extruded Tube and Cold-rolled Tube
stainless steel seamless steel tube
Stainless steel seamless steel pipe is a kind of strip steel with hollow section and no seam around it.
◆ Seamless steel pipe manufacturing technology and process
Smelting > ingot > steel rolling > sawing > peeling > perforation > annealing > pickling > ashing > cold drawing > cutting > pickling > warehousing.
◆ Features of Seamless Steel Pipe
From the above process, we can easily see that:
First, the thicker the wall thickness of the product, the more economical and practical it is, and the thinner the wall thickness, the higher the processing cost.
Secondly, the technology of this product determines its limitations. Generally, the precision of seamless steel pipe is low: the wall thickness is uneven, the brightness of the inner and outer surfaces of the pipe is low, the cut-to-length cost is high, and the pits and black spots on the inner and outer surfaces are difficult to remove;
Third, its detection and shaping must be done off-line. Therefore, it shows its advantages in high pressure, high strength and mechanical structure materials.
Specification and model of steel pipe
Product name specification, model standard name standard number
Steel pipe: φ 6 ~ 630x 1 ~ 50 mm, stainless steel pipe for fluid transportation: GB/T 14976-2002.
Steel pipe: φ 6 ~ 630x 1 ~ 50 mm, seamless stainless steel pipe for structure: GB/T 14975-2002.
Steel pipe: φ 6 ~ 630x 1 ~ 50 mm, stainless steel pipe for boiler and heat exchanger: GB 13296-9 1.
Steel welded pipe: φ 2 19 ~ 1200x3 ~ 20mm, stainless steel pipe for fluid transportation: GB 12770-2002.
Use of stainless steel pipes
In industry, stainless steel square pipes are mainly used to manufacture some conveying pipes.
Of course, it is more widely used in the construction industry, such as stair handrails, window guardrails, railings, road partitions and so on. At present, many products use stainless steel tubes, such as bicycles, medical devices, automobiles and so on. Advantages of stainless steel square pipe
Stainless steel square pipes are widely used, of course, there are certain reasons. The most important thing is long service life, good corrosion resistance, light weight, but high strength, which reduces the load of products, increases the bearing capacity and makes consumers feel more at ease.
Specification introduction of stainless steel square pipe
The specification of stainless steel pipe generally depends only on its inner diameter and wall thickness, and its length can be determined according to the needs of consumers. The specifications of common stainless steel pipes in the market are roughly as follows: internal diameter 6. 0mm above, the wall thickness is below 13mm; The inner diameter is greater than 30mm, and the wall thickness is greater than 1. 2mm inner diameter is greater than 30mm,
Wall thickness is less than 1. 2mm, etc. The above is my introduction to the use and specifications of stainless steel pipes, hoping to help you. The price of stainless steel pipe generally depends on the material of stainless steel pipe. Generally speaking, the price of 204 stainless steel pipe is the most expensive. As for the specific price, a large part depends on the local market situation.