What are the requirements for the maintenance of LSAW steel pipe?

LSAW steel pipe is a kind of welded steel pipe. Steel pipe parallel to the longitudinal direction of the steel pipe. After the hot rolled steel coil is formed by forming machine, the said coil is converted into a cylinder and welded by using high frequency current skin effect and proximity effect or arc combustion under the flux layer, so that the edge of the pipe billet is heated, melted, fused and cooled to form under a certain extrusion pressure, correct, petroleum, metallurgy, construction, coal mine, port, machinery, and other industries are widely used in the transportation of oil and gas, low-pressure water and gas transportation, mine fluid transportation , belt conveyor, automobile drive shaft and other industries.

LSAW pipe plays an important role in people's life and work, but the maintenance of LSAW pipe has always been a headache. Let's learn about the things we should pay attention to in the maintenance process.

Choose the right place and warehouse

Places and warehouses where steel pipes are stored should be clean, free of water and away from factories and mines that produce harmful gases and dust. Weeds and debris should be removed on site to keep the steel pipe clean.

Steel pipes in warehouses should not be stacked with corrosive substances such as acid, alkali, salt, cement, etc. Different types of steel pipes should be stacked separately to prevent confusion and contact corrosion.

Large section steel, steel rails, faded steel plates, large diameter steel pipes, forgings, etc. can be stacked in the open air.

Small and medium-sized sections of steel, wire rod, rebar, medium-diameter steel pipe, steel wire and wire rope can be stored in well-ventilated material sheds, but must be installed with lower mats.

Some small steel tubes, steel plates, silicon steel sheets, small or thin-walled steel tubes, steel strips, all kinds of cold-rolled and cold-drawn steel tubes and corrosion-prone metal products can be stored in the warehouse.

Warehouses are selected according to geographical conditions, generally using a general closed warehouse, that is, the roof has a wall, doors and windows are tight, the warehouse is equipped with ventilation facilities.

Warehouses should be ventilated on sunny days, closed on rainy days, and maintained in a proper storage environment.

Reasonable stacking, first-in-first-out

The principle of stacking is to stack according to varieties and specifications under the condition of stable and safe stacking, and separate different varieties of materials to prevent confusion and mutual corrosion.

It is strictly prohibited to store items that have a corrosive effect on the steel pipe near the stacking location.

The bottom of the piles should be high, firm and smooth to prevent moisture or deformation of the materials.

The same material should be stacked according to the order of storage, and should implement the principle of “first in, first out”.

For steel sections stacked in the open air, there must be wooden mats or stone strips, and the surface of the stack should be slightly inclined to facilitate drainage, and attention should be paid to the flatness of the material to prevent bending and deformation.

The height of manually operated stacks shall not exceed 1.2 meters, the height of mechanically operated stacks shall not exceed 1.5 meters, and the width of stacks shall not exceed 2.5 meters.

There should be a certain access between the chimney and the chimney, the inspection track is generally 0.5 meters, and the approach depends on the size of the material and the transportation machinery.

Bottom bedding height, the warehouse is Sunrise cement floor, bedding height is 0.1 m, if mud, it is necessary to fill 0.2 ≤ 0.5 m. If it is an open field, the height of the cement subfloor bedding is 0.3 ~ 0-5 m, and the height of the sand and mud bedding is 0.5 ~ 0.7m.

Steel angles and channels in the open environment should be bent down, i.e., the opening is downward, vertical I steel, and the surface of the i groove of the steel pipe should not be upward to prevent the accumulation of water rust.

Protective materials, preservatives or other plating packages used before the plant are important measures to prevent rusting of materials.

Keep the warehouse clean and enhance material maintenance

Before entering the warehouse, care should be taken to prevent rain from wetting or mixing impurities, according to its performance, different methods should be used to clean the contaminated material, such as available high hardness wire brush, low hardness cloth, cotton and so on.

Materials should be checked frequently after storage in the warehouse. If there is rust, the rust layer should be removed.

After the surface of the steel pipe is cleaned, instead of applying oil, rust preventive oil should be applied to the internal and external surfaces of high-quality steel, alloy steel pipe alloy steel plate, thin-walled pipe and so on.