Department standard tubeAlso known as spiral welded pipe, it is made by winding the steel strip of low-carbon structural steel or low-alloy structural steel on the pipe blank at a certain spiral angle (called the forming angle), and welding the pipe after stitching. Large-diameter steel pipes can be produced from narrow strip steel, so let's learn what are the functions of the lower standard pipes!

Characteristics of 1. Department Standard Tube

Longitudinal welded pipe production process is simple, high production efficiency, low cost, rapid development. The strength of the standard pipe is generally higher than that of the straight seam welded pipe, and the welded pipe with larger pipe diameter can be produced with narrow raw materials, or the welded pipe with different pipe diameters can be produced with the same width of raw materials. However, compared with the same length of seamless pipe, the welding length, plus 30~99.9, and the production speed is very low. Therefore, small diameter welded pipe mostly adopts straight seam welding, large diameter welded pipe mostly adopts spiral welding.

II. Purpose of Ministry Standard Tube

Ministry of standard pipe is mainly used in water engineering, petrochemical, chemical, power industry, agricultural irrigation, urban construction. As a liquid transport, water supply, drainage, sewage treatment process, send mud, sea water. Gas transmission: gas, steam, liquefied petroleum gas. Structural use: for piling, for bridges; for docks, roads, real estate structures with pipelines, marine piling pipelines, etc.

Standard and use of standard pipes: spiral steel pipes for pressurized fluid transportation are mainly used for pipelines transporting oil and natural gas. They are welded by high-frequency overlapping welding method. The steel pipes have strong pressure capacity, good plasticity and are easy to weld and process. Spiral double-sided submerged arc welded steel pipes for ordinary low-pressure fluid transportation are manufactured by double-sided automatic submerged arc welding or single-sided welding, and are used for water, gas, air, steam, real estate piling, low-pressure transportation piping, etc.

The production process of the department standard tube is a department standard tube made of strip steel winding as raw material, often warm extrusion forming, and welded in the automatic double-line double-sided submerged arc welding process. As the characteristics of the standard pipe, the production process of the straight seam steel pipe is simple, the production efficiency is high and the cost is low. The ministry standard tube is generally higher than the straight seam steel tube. The ministry standard tube with large diameter can be produced with narrow materials, and the ministry standard tube with different diameter can also be produced with strip steel of the same width.

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