The DKPW kit is everything needed to overcome magnetic arc blow in one robust and easy to use package. At its heart is the world leading Zeromag machine, which measures and neutralizes magnetic fields which may be present in the weld preparation region of mating steel components. At 25 kg, this is a portable machine that can be carried by one person from site to site or where it is needed. Zeromag ZM100A, working with up to 100m of demagnetizing cable, can provide the necessary reverse magnetic field for most pipe welding scenarios. With the optional ZeroZone accessory, specifically built for plate applications, plate welds can be demagnetized more efficiently than lay on coils and is easier to deploy.
ZeroZone Optional Accessory
For high fields, the most efficient way to null the magnetic field is to use ZeroZone. Pre-wound with 40 turns and provides a magnetic bridge across the weld prep to allow control of the magnetism. In operation, ZeroZone is placed across the weld prep. The arms and pole pieces are adjusted so that the active area of the pole pieces are in close contact with both sides of the work piece. ZeroZone is then connected back to Zeromag and the system used as normal. ZeroZone is particularly effective with Zeromag operated in automatic or manual nulling modes. Rapidly deployed and simple to operate.
| Magnetic Field Reduction | Typically reduced 20x for most weld scenarios magnetic field reduced to <10 Gauss |
| Maximum Static Field that can be Nulled | 1800 Gauss (depends on pipe material and geometry) |
| Range of Pipe Sizes | For circumferential winding any diameter up to 2m. For lay on coils coils no restriction including plate |
| Minimum Size of Weld Prep | 5mm operating, 2mm at setup |
| Magnetic Field Nulling Time | 3 seconds typical |
| Space from Weld Line to Demag Cables | 0.5m typical |
| Weld Passes | Always use on root pass - check field levels for additional passes |
| Materials | All ferritic steels, bonded lined pipes with stainless steel or inconel, high nickel or chrome steels |
| Material or Wall Thickness | Unlimited - but thick material requires longer to get good nulling field penetration |
| Welding Types | TIG, MIG, (GMAW), stick, FCAW |
| Auto Welders/Bots/Robot Welders | Deploy probe on the weld head |
| Preheat Temperature | to 85C. Above this insulating blankets required for the demagnetizing cables (available from Diverse) |
| Environmental | Temperature -20 C to 50 C For arctic operations there is a case heating option. Humidity 0-90% non condensing Not water proof so do not operate or store in a wet environment |
| Sub Sea | The equipment is not hyperbaric - operation in sub sea dry environments to a maximum depth of 50 feet |
| Support | Call/email Diverse for support for use of DKPW for different weld scenarios |
| Training | One day of training application and hands on training available |
| Zeromag ZM100A | |
| Magnetic Field Reduction | Typically reduced 20x for most weld scenarios magnetic field reduced to <10 Gauss |
| Gaussmeter Measurement Range | 0 to +/-1800 Gauss |
| Resolution | 1 Gauss |
| Magnetic Probe Size | 5mm x 20mm x 100mm long. Encased in stainless steel |
| Current Output Range | 0 to +/-100 Amps max |
| Output Voltage Range | 0V to 15V |
| Magnetic Field Nulling Time | 3 seconds typical |
| Manual Control | -100A to +100A continuously variable with 10 turn control |
| Auto Control | Auto-tracking and nulling of magnetic field |
| Line Power | Line voltage range 90V - 265V ac 48 - 62Hz Power 1.8kVA |
| Operating Temperature | -20C to 50C |
| Storage Temperature | -40C to 85C |
| Humidity | 0 - 90%, non-condensing |
| Weight | 26kg |
| Dimensions (WxLxH) | 520 x 220 x 550mm |
| Storage Dimensions | WxLxH 62 x 26 x 63, weight 35kg WxLxH 62 x 26 x 53, weight 28kg |
| Calibration | Calibrated by Diverse to NPL traceable standard |
| Housing | Built into a carrying case to enable it to be used on site; 19” portable rack, 4U |
| Demagnetizing Cable | 50m + 50m. Options: bobbins and clam coils |
| EMC | CE approved for emissions and immunity standards |
| Warranty | 12 months |
| Magmeter MF300H+ | |
| Manual Ranges | 0-19990 gauss in 3 ranges |
| Auto Range | Automatically adjusts range with field |
| Measurement Modes | Average, absolute peak, bipolar peak, true RMS |
| Probe Size | 2.2mm x 6.5mm 100mm long |
| Probe Cable Length | 1.5m typical |
| Power | 4 standard AA cells , typical lifetime 12 months. Continuous use 30 hours |
| Instrument Size | 165 x 100 x 50mm |
| Weight in Case | 1.1kg |
| Environmental | -20 to 50C operating, -20 to 80C storage |
| Humidity | 0-90% non condensing |
| Warranty | 12 months |
| Turns | 20 turns deployed on each arm |
| Operating Misalignment Allowance | Side arms and pole pieces adjustable allowing compensation for misaligned weld components |
| Range of Pipe/Plate Sizes | Supplied with 2 pairs of pole pieces for plate (flat and corner) and for 16” diameter pipe. Pole pieces can be supplied for user defined sizes |
| Deployment | Usually one deployed across the weld prep and the seam is welded between the jaws. Ratchet belts supplied to secure ZeroZone to pipes. |
| Vertical Deployment | Vertical mounting eyes on the assembly to allow hanging from post, crane or framework |
| Cables to Zeromag | Supplied with extension cables to Zeromag |
| Weight | 17kg |
| Size | 30 x 26 x 17 cm plus cable |
| Operating Temperature | Up to 85C. Extended temperature range as option |
| Extended Temperature Range | Option for high temperature cable to 180C |
| Construction and Material | Nickel plated steel with 120A connectors |
| Storage | Supplied with wooden shipping and storage case |
| Working Current | Up to 100A |
| Operational Storage | It is important to keep the connector contacts clean. |
| Environmental | Temperature -20C to 50C Humidity 0-90% non condensing Do not operate or store in a wet environment |
