The main technical characteristics and a complete range of steel pipes are defined by GOST. If you know the marking, then it will not be difficult for you to determine the method of manufacturing the pipe and its other characteristics.
All products manufactured should receive a certificate of conformity, which must indicate the brand of the used steel. Also, any pipe marking should take into account the outer diameter, which is subsequently indicated in various classifiers and price list. The consumer focuses on the diameter when buying a building material. The weight of the pipe is calculated based on its length. The internal diameter by GOST is not installed, but calculated using the difference between the outer diameter and the thickness of the walls.
The outer diameter of the steel pipe is of three types: 530-1420 mm-large, 102-530 mm-average, and below 102mm-small.
In terms of diameter ratios, the steel pipe is divided into the thickness of the pipe: a special coo -canine steel pipe, a thin -walled pipe, normal, thick -walled and especially weed.
Steel pipes made of high -carbon and low alloy steel are made. The choice of steel is based on further operational conditions. The most popular are electric welding pipes with a diameter of 20-1220mm.
The assortment of steel pipes is very wide: electric steel pipes, seamless, profile, water and gas -conducted and galvanized.
Buying steel pipes is best directly from the manufacturer itself. This will provide you only with high -quality goods having proper certification. In the manufacturer’s warehouses, there is almost always a full range. Some manufacturing companies also sell goods used or “dull” goods, which can significantly save your budget.