Steel Pipe Forming Process

The steel pipe is welded. It is cut from a steel belt into a narrow steel belt and then wrapped into a pipe with a cold mold. Then perform special welding of pipeline welds. The outer weld is polished and bright. Within the burr of the pipe is not to fight. The only precision welding to combat internal burrs.

The seamless steel pipe is a hot-drawn cylindrical steel ingot into the pipe, so the weld cannot be seen.

Steel pipe use classification:

1. The water gas pipeline is a commonly used welded steel pipe. The fluid and gas to be transported are called to feel the pressure, so the pipe wall is relatively thick.

2. Galvanized iron pipes are galvanized welded steel pipes. Galvanized inside and outside, water can be transported. Let Electric used when threading. General is the relatively thin walls. Now the market is very poor.

Steel pipe anti-corrosion grade:

Steel pipes, open at both ends of the steel pipe, which has a hollow cross-section and its relatively large length, and nearby steel can be divided, according to the production method of seamless and welded steel pipes, pipe size (diameter, side length, etc.) and wall thickness, A very wide size, from a small diameter to a large diameter capillary diameter of a few meters. Steel pipes can be used in pipelines, thermal equipment, industrial machinery, petroleum exploration, containers, chemicals and special uses.

Seamless steel pipe: 

Seamless steel pipe is made of a single metal piece on the surface of the steel pipe connection. The production methods can be divided into hot-rolled pipes, cold rolled pipes, cold drawn pipes, and extruded pipes. The cross-sectional shape can be divided into two types: round and irregular. The maximum diameter of the seamless pipe is 650 mm (enlarged diameter pipe), and the minimum diameter is 0.3 mm (capillary pipe). According to different thicknesses, it can be divided into a thick-walled pipe and thin-walled pipe. Seamless pipes are mainly used for high-precision structures such as petroleum exploration pipes, petrochemical cracking pipes, boiler pipes, bearing pipes, and automobiles and aerospace steel.

Welded steel pipe: 

Welded steel pipe refers to the curved and deformed steel strip or steel plate made into a round, square and other shapes, and then welded to the surface of the steel pipe and weld. According to different welding methods, it can be divided into arc welding pipe, high and low-frequency resistance welding pipe, gas pipe, furnace pipe, Bundy pipe. Weld shape can be divided into longitudinal welded pipe and spiral welded pipe.

Welded steel pipes used in oil drilling and machinery manufacturing. The heating furnace can be used as water pipe and gas pipe, a large-diameter welded pipe, used for high-pressure oil and gas transportation; used for oil and gas transportation pipe piles, spiral welded pipes of the dock. The cost of welded steel pipe is lower than that of a seamless steel pipe, and the production efficiency is high.

The above information is provided by galvanized steel pipe manufacturer.