Some FAQ about welded pipe welding

Release Time :

2022-10-27 13:30

1.What is welding power supply?

Weldingpower supply refers to the equipment with electrical characteristicssuitable for welding in the electric welding machine and provides theelectric energy required for welding, which is called welding powersupply.

2.When the arc length changes, the arc voltage will also change?

Answer:it is determined by the external characteristics of the arc weldingpower source. The longer the arc, the higher the arc voltage. Theshorter the arc, the lower the arc voltage.

3.In CO2 welding, when the extension length of welding wire changes,will the current display value change?

Answer:the longer the extension length of the welding wire, the greater theresistance of the welding wire and the greater the current heatconsumption. The smaller the welding current value, the smaller theactual welding current. Therefore, the elongation of the welding wireis generally set in the range of 12-20 mm.

4.What is the arc stiffness?

under the action of magneticcontraction and thermal contraction, the straightness of the arcalong the axial direction of the electrode is the arc stiffness.

5.What kind of welding will have arc bias blowing?

Answer:during welding, the arc center deviates from the electrode axis dueto the action of magnetic field, the interference of air flow or theinfluence of electrode eccentricity.

6.What is the direct connection method?

Answer:in DC arc welding, the welding machine is connected with the positivepole of the output end of the weldment, and the output end isconnected with the negative pole of the welding gun. This connectionis called "positive connection", also known as positivepolarity.

7.What is arc spot welding?

Answer:the lap joint of thin plate adopts MIG / MAG / TIG / CO2 weldingmethod. Within a certain time, the surface nugget is formed withwelding current to connect the upper and lower plates.

8.What is the lag time?

Answer:after the welding arc is extinguished, stop the gas supply afterdelaying the shielding gas for 0.3-5 seconds.

Some FAQ about welded pipe welding

The welding process used for submerged arc welded straight seam steel pipe is submerged arc welding technology, which adopts filler welding and particle protection flux submerged arc. The diameter of production can reach 1500mm. LSAW is the English abbreviation of submerged arc welded straight seam steel pipe. The production process of submerged arc welded straight seam steel pipe includes JCOE forming technology and coil forming submerged arc welding technology. When the diameter is large, two steel plates may be used for rolling, which will form the phenomenon of double welds.

2022-10-27

Some FAQ about welded pipe welding

Reducing high-pressure boiler pipe eddy current testing misjudgment several key factors: (1) Coil eddy current testing and inspection center roller consistency in relation to the accuracy inspection rate high pressure boiler tube inspection system of the entire product, the coil center alignment requirements than the sample through holes circumferentially poor sensitivity ≤2dB, signal to noise ratio ≥ 8dB.

2022-10-27

Some FAQ about welded pipe welding

Argon reduces the burning loss of alloy elements and obtains denseand high-quality welded joints; The protection can isolate the adverse effects of oxygen, nitrogen and hydrogen in the air on arcand molten pool.

2022-10-27

Some FAQ about welded pipe welding

Submerged arc welding technology is ideal for important applications such as pipelines, pressure vessels and tanks, rail manufacturing and large buildings. There are the simplest form of monofilament, double-filament structure, tandem double-filament structure, and multi-filament structure.

2022-10-27

Some FAQ about welded pipe welding

1.What is welding power supply? Weldingpower supply refers to the equipment with electrical characteristicssuitable for welding in the electric welding machine and provides theelectric energy required for welding, which is called welding powersupply.

2022-10-27

Some FAQ about welded pipe welding

Gas welding is a welding method that uses the flame generated by themixed combustion of combustible gas and combustion supporting gas asthe heat source to melt the weldment and welding material and realizeatomic bonding. Electric welding uses electric energy to pressurize,heat, or both, with or without filler material to achieve atomicbonding of weldments.

Shandong Xinghan Aluminum Industry Group Co., Ltd.

Tel : +8615562508601
Email : cnxh005@xhsteelgroup.com
WhatsApp：+8615562508601
Address : 15A11, Building J1, Hi tech Wanda Office Building, No. 57, Gongye South Road, Lixia District, Jinan, Shandong, China