High frequency welded pipe ERW welded Pipes

The so-called high frequency in high frequency welding refers to the current with a frequency of 50KHz-400KHz. This current will have two effects on the metal. One is the skin effect: unevenness occurs when high-frequency current passes through the conductor. And the density of the conductor surface is large and the inside is small, which is the skin effect; one is the proximity effect, high-frequency current flows in the opposite direction between adjacent conductors, even if the other side is short, the current will be concentrated to the edge. Will flow to the shorter side, producing a proximity effect. These two effects are the basis of high frequency welding. High-frequency welding uses the skin effect to concentrate the high-frequency current on the working surface, and uses the proximity effect to control the loop position and range of the high-frequency current, so that the adjacent steel plates are heated and melted to complete the welding.

High-frequency welding technology uses the change of current frequency to produce skin effect and proximity effect on metal, thereby causing the metal to melt and complete the welding. Therefore, controlling its current is the most important technical parameter. The above analysis is high frequency welded pipe. The main technical parameters that need to be controlled in this process and their technical characteristics indicate that to reduce energy consumption, impedance, frequency and induction coils must be fully adjusted. Used to ensure welding quality.

There are four types of high-frequency welded pipes:
1. Welded steel pipes used for low pressure fluid delivery are also called ordinary welded pipes, usually called clarinets.
2. Galvanized welded steel pipe used for low pressure fluid transportation is also called galvanized welded steel pipe, commonly known as white pipe
3. Ordinary carbon steel wire casing is a steel pipe used to protect wires in electrical installation projects such as industry, civil construction, and mechanical equipment installation.
4. Straight seam electric welded steel pipe refers to a steel pipe whose weld seam is parallel to the longitudinal direction of the steel pipe.

My company hot sale steel pipe and pipe fittings:

ASTM A106 B seamless pipes,（1” to 24” sch40, sch80),

API 5L GR.B steel pipes, (seamless pipe, LSAW pipe, SSAW pipes, 1” to 110” sch 40, sch80),

Boiler tubes,( 20G. 12Cr1MoVG, ASTM A335 P5, P9, P11),

ASTM A333 GR.6 seamless pipes, ( 1” to 24” sch40, sch80, sch160),

TP304/304L, TP316/TP316L, stainless steel pipes, (1” to 48” sch10, sch20, sch40, sch80),

API 5L X65, X70 PSL2 LSAW welded pipes, (20” to 60” sch40, sch80, sch160),

API 5CT seamless casing, and tubing, (2 3/8” to 20” K55, J55, N80, L80, P110),

Pipe fittings, elbow, reducer, ,tee,cap, flange