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Nuclear power, petrochemical pipelines

Nuclear power, petrochemical pipelines

Application information


First, the name: narrow gap TIG welding system


Uses: For narrow-gap thick-walled pipe full position or fixed position welding


Application industry: petrochemical, nuclear power, thick-walled pipe site installation


The main parameters:


Suitable for welding the maximum

 thickness of the workpiece

70mm

Workpiece groove width

9-16mm

Welding speed

50-200mm/min

Thickness of each pass

2-5mm

Wire diameter

Φ0.8、Φ1.0

Protective gas

Pure argon

Electrode diameter

Φ2.4、Φ3.2mm

Features:


     The torch is mainly composed of a torch angle part, a torch fixing part, a back protection gas hood part, a gas hood lifting part, a wire feeding bracket part and a front and back camera monitoring system.


Process features:


  Suitable for narrow bevel welding above 9MM;


  Application of the tungsten swing technology, so that both sides of the groove full welding;


  High deposition efficiency, low heat input;


  Unique five-way water-cooled design, high duty cycle;


  Double gas protection, effectively ensure the quality of weld surface forming;


  Torch consumables replacement and maintenance easy, less wearing parts, low cost;


  Suitable for carbon steel, stainless steel, nickel-based alloys, titanium and other materials;


  Can achieve horizontal welding, vertical welding and all kinds of welding and other locations;


         


Second, the name: a fixed location MIG narrow gap


Uses: Suitable for all narrow-gap butt welding of structural industries and fields that use medium-thick wall plate and pipe.


Applications: Oil pipelines, oil drilling machinery, coal mining machinery, boilers, pressure vessels, thick-walled pipelines in the power industry, marine structures, railway steel structures, etc.


The main parameters:

Suitable for welding the maximum 

thickness of the workpiece

150mm

Workpiece groove width

9-18mm

Welding speed

40-300mm/min

Thickness of each pass

4-7mm

Wire diameter

Φ1.0、Φ1.2

Protective gas

mixed composition

Electrode diameter

Φ2.4、Φ3.2mm

Features:


    According to the groove width adjustment wire swing width technology, making the groove full integration on both sides, high deposition efficiency, low heat input, welding deformation is relatively small, high reliability welding. With the enlargement of welding structure, more and more plates with 50-150mm thickness have been used in pressure vessels, construction machinery, coal machinery, shipbuilding and offshore platforms, etc., and the welding has also become a topic of great concern to everyone. The traditional way to open a large breach, not only difficult to open the groove, slow welding speed, and post-weld stress, deformation, resulting in low productivity. The narrow gap welding process can not only greatly reduce the cross-sectional area of the groove but also greatly reduce the filling amount of the weld metal, and at a relatively low line energy, efficient welding can be achieved and an ideal welding joint performance can be obtained. Therefore widely used in large-scale important structures abroad. Narrow gap welding process has N-GTAW, N-GMAW, N-SAW, the current domestic applications in the boiler and pressure vessels and other industries are more N-SAW and N-GTAW. N-SAW requires flux, and in addition to achieve a good fusion of the sidewalls, due to the coarse wire can not be achieved swinging, the need for two welding process, the equipment process is relatively complicated; N-TIG welding slow; and narrow gap N-GMAW in both Between the welding wire can swing, solves the single side wall fusion, but also can improve the welding efficiency, while the equipment is relatively simple, so the narrow gap MAG welding technology application scenario, the narrow gap of 70% of the application of N-GMAW.


    Hua Heng narrow gap MAG welding technology, including welding equipment and technology, can be successfully applied to the wall thickness of 200mm below the groove gap 6.5-14mm workpiece longitudinal ring seam welding. Equipment, including high-stability digital pulse welding power supply, narrow-gap swing mechanism and controller, narrow gap gun and related equipment. Process includes different forms of wall thickness, welding parameters.



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