arcraft plasma logo
  Welder Training & Certification
Home About us Download Products Hard Bander sitemap contact
main banner
arrow decoration Plasma Cutting Machines
arrow decoration Plasma Transferred Arc Welding (PTA)
arrow decoration Welding Automation
arrow decoration Plasma Welding Equipments
arrow decoration Micro Plasma Welding Machines
arrow decoration Micro TIG Welding Machines
arrow decoration Welding Inverters
arrow decoration Bore Welding Cladding
arrow decoration Welding Data





Redrying may be repeated twice within the total time of 3 hours.


A) Redrying of electrodes should be carried out by taking them out of the packaging and placing the electrodes in layers of about 3 cm thickness in temperature controlled air circulation oven. Severity of redrying conditions (Time-Temperature) will depend on:
a) The permissible level of diffusion hydrogen;
b) Relative humidity in the shop or at the site, i.e. in open area or in a tunnel. Thus, during the rainy seasons, redrying should be more severe within the time-temperature range.
B) Storage areas:
Storage of electrodes in cardboard boxes required due control on humidity and temprature.Recommended storage conditions are:
Temperature : 30-45oC
Relative Humidity : 50% Max.
Heaters or high wattage lamps may be fixed in the enclosed store room to maintain temperature in the range of 30-45oC, so that the relative humidity remains below 50%. Generally, a temperature of about 15oC above the ambient temperature is considered safe for such store room. A dehumidifier of adequate capacity may be installed as a part of the storing facility. The dehumidifier may be operated as and when the relative humidity in the atmosphere rises above 80%, as during the rainy season, so that with or without the use of heater or lamps, the R. H. in the store room is kept under 50%.
C) Whenever hydrogen-controlled electrodes EXX16 or E XX18 or E XX28 or E XX48 are recommended and selected, it is equally important to ensure that moisture in electrode coating is kept at a low level through redrying. In the case of austenitic stainless steel types (E 300 series), control over coating moisture is necessary to prevent starting porosity. The climatic conditions in large to the redrying schedule. Within the frow in sophisticated welded fabrication, and the rising quality standards, due attention has to be paid to the redrying schedule. While the recommendation in the Table is given as a guideline, it is hardly possible to lay down a definite redrying schedule for the entire country with its widely varying climatic conditions and the seasonal changes.

Judging Temperature by Colour(Steel)

Temperature Colour oC Luminious Colour oC
Pale Yellow 200 Faint dark red 590
Straw Yellow 220 Cherry red (dark) 650
Yellow brown 240 Cherry red (medium) 700
Bluish purple 270 Red 760
Violet 285 Light red 815
Pale blue 300 Orange 930
Blue 325 Pale orange lemon 1000
    Lemon 1150
    Yellow 1260

Colour temperature are useful as a rough guide and surprising accuracy can be attained with practice.

Conversion of Faherenheit and Centigrade Temperatures:

t(oC) =5/9 [(oF)-32]
1 ton per square inch (tsi)

= 1.575 kg/mm2

1 kpsi = 0.703 kg/mm2
1 = 0.1383 kgm


Plasma Cutting Machines

For precision cutting of Stainless steel, Aluminium and all other Ferrous and Non-ferrous metals.
Stainless Steel cutting upto 150 mm thick plates.

PTA Hardfacing & Cladding

(PTA) for Hardfacing / Cladding / Reclamation & Protection of Mechanical parts.

Welding Automation

Increase Productivity and    Capacity
Repeatable high quality    welds
Enhance Quality
Custom made solutions

Plasma Welding

Less sensitivity to changes in  
 Arc length.

Micro Plasma Welding Machines

 Precision welding of     minature    
 Controlled Arc at low currents
 Automated welding at low
 With built-in Pilot arcing     system.

Micro TIG Welding Machines

 Precision welding of     minature parts
 Ideal for smaller repair or
    Assembly work.
 Built-in high frequency     ignition.

Welding Inverters

Light weight & compact : 80% less weight compared to conventional machines.

Arcraft Plasma Equipments (India) Pvt. Ltd. Manufacturers Suppliers and Exporter of
Plasma Welding, Plasma Transferred Arc Welding (PTA), Plasma Cutting Machine, Micro Plasma Welding Machine, Micro Tig Welding Machine, Hard Bander, welding inverter, welding automation, hard banding machine, welding positioners, welding ocillators mumbai, india. manufacturers, suppliers and Exporter of AC Welding Machines, Mig welding Machines, Shape Cutting Machines, Special Purpose Machines for hardfacing and cladding. mumbai. india.

| About Us | Download | Products | Hard Bander | Sitemap | Contacts | Related Links
Website Development By