The difference between the standard specification of spiral steel pipe and precision steel pipe

Spiral steel pipes are mainly used in water engineering, the petrochemical industry, the chemical industry, the electric power industry, agricultural irrigation, and urban construction. Spiral steel pipes are twenty critical products developed in my country. For liquid transportation: water supply, drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structure: for piling pipe, for bridge; for wharf, road, building structure, etc.

Spiral steel pipe is a spiral seam steel pipe made of strip steel coil as raw material, often warmly extruded, and welded by the automatic double-wire double-sided submerged arc welding process. The spiral steel pipe feeds the strip into the welded pipe unit. After rolling by multiple rollers, the strip is gradually rolled up to form a circular tube blank with an opening gap. 3mm, and make both ends of the welding joint flush.

The difference between spiral steel pipe and precision steel pipe
Spiral steel pipes can be divided into two categories according to the production method: spiral steel pipes and seamed steel pipes, and seamed steel pipes are referred to as straight seam steel pipes. Spiral steel pipes can be divided into hot-rolled seamless pipes, cold-drawn pipes, fine steel pipes, hot-expanded pipes, cold-spinning pipes, and extruded pipes according to production methods. Spiral steel pipes are made of high-quality carbon steel or alloy steel and are divided into hot-rolled and cold-rolled (drawn). The main feature of the spiral steel pipe is that it has no welded seams and can accept greater pressure.

Products can be very rough as-cast or cold-drawn parts. Welded steel pipes are divided into furnace welded pipes, electric welding (resistance welding) pipes, and automatic arc welded pipes because of their different welding processes. They are divided into straight seam welded pipes and spiral welded pipes because of their other welding methods. Shaped welded pipe and special-shaped (square, flat, etc.) welded pipe.

Welded steel pipes are made of rolled steel plates with butt or spiral seams. In manufacturing methods, they are further divided into welded steel pipes for low-pressure fluid transport, spiral seam electric welded steel pipes, direct coiled welded steel pipes, and electric welded pipes. Spiral steel pipes can be used for liquid pneumatic pipelines and gas pipelines in various industries. Welding channels can be used for water pipelines, gas pipelines, heating pipelines, electrical pipelines, etc.

Fine steel pipe is a product that has appeared in recent years, mainly because the inner hole and outer wall have strict tolerances and roughness. Precision steel pipe is a kind of high-precision steel pipe material after cold drawing or hot rolling. Due to the advantages of no oxide layer on the inner and outer walls of the fine steel pipe, no leakage under high pressure, high precision, high brightness, no deformation in cold bending, no flaring, no cracks in flattening, etc., it is mainly used to produce products for pneumatic or hydraulic components, such as cylinders or cylinder.