ERW steel pipes produced by Kalup factories with a diameter of 6 to 16 inches and a thickness of 4 to 12.7 mm are used in water, oil, gas and petrochemical industries. these pipes are manufactured by low-frequency or high-frequency resistance.

They are round pipes welded from steel plates with longitudinal welds. It is used to transport oil, natural gas and other vapor-liquid objects, and can meet various requirements of high and low pressure. At present, it occupies a pivotal position in the field of transportation pipes in the world.

During ERW pipe welding, heat is generated when current flows through the contact surface of the welding area. It heats the two edges of the steel to the point where one edge can form a bond. At the same time, under the action of the combined pressure, the edges of the tube blank melt and squeeze together.

The production standards of these pipes are IPS, API 5L PSL2, and IGS, and Kalup factories can produce different types of sheets from grade A to grade X70 in this way based on customer needs.