ZD7-1000 Submerged Arc Welder

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ZD7-1000 Submerged Arc Welder

Submerged Arc Welder

ZD7-1000 inverter multi-process arc welding power source. Design features - Compact footprint that saves valuable floor space - Penetration control advantage: deeper penetration without increasing heat input - Controllable penetration with repeatable parameter accuracy - Fast arc starting - One machine for submerged-arc welding, manual arc welding, carbon-arc gouging and electroslag welding - Good bead appearance and a wide range of matched applications - IP23S protection rating for improved safety - Heavy industrial rating: 100% duty cycle at 40 °C for severe operating conditions Applications Mainly for carbon steel and its alloys and stainless steel. Widely used in steel-structure buildings, bridges, locomotives and ships, pressure vessels, spiral-welded pipe and large forgings. Why 1000 A 1000 A is specified for heavy plate and for high-deposition applications such as pressure-vessel shells, bridge girders and large fabricated sections. At this current the process advantage is decisive: a single pass replaces several manual passes, and the flux blanket keeps the working environment clean even at sustained high duty.

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Key Features

1000 A output for high-deposition welding of heavy plate
DC submerged-arc output: stable arc, deep penetration and high melt-off rate
Flux-covered arc: no spatter, no arc glare, very low fume
Consistent reinforcement and bead width, minimal post-weld dressing
Reduced bevel preparation on thick sections, saving filler and time
Suits tandem and multi-wire automatic welding setups
100% duty cycle at 40 °C for continuous heavy industrial operation

Typical Applications

Pressure vessel shell longitudinal and circumferential seams
Boiler drums and pressure parts
Tanks and large-diameter pipe
Heavy structural H-beam welding

Selection & Setup Notes

1000 A is the mainstay for pressure vessels and boilers. Such work usually requires procedure qualification and weld traceability, so establish parameter logging and flux baking procedures together. See the submerged arc welder section.

Standards & Further Reading

External reference: American Welding Society (AWS) — Welding procedure and qualification references published by the American Welding Society.

Frequently Asked Questions

Can it weld stainless or alloy steel?

Yes, with matched wire and flux and a material-specific procedure qualification — carbon steel parameters cannot be reused.

What equipment does circumferential welding need?

Turning rolls to rotate the work, plus seam tracking to keep the wire on the groove centreline — essential on long seams.

How do I avoid hydrogen porosity?

Bake flux at 300–350 °C for 2 h, clean the groove thoroughly, use rust-free and oil-free wire, and tighten baking and holding rules in humid conditions.

ZD7-1000 Submerged Arc Welder