Heatwork Engineers

Andheri, Mumbai, Maharashtra

  Channel Heaters are main voltage heating elements. The elements can be connected in 'STAR' or 'DELTA' and operated from 380 / 415 / 440V 3 phase supply. They can be used to heat treat circumferential joints of large vessels using 'BULKHEAD' technique or can be used for building temporary furnaces for Heat Treatment at site. Portable and easy to handle, they have a long on-site working life and are suitable for a variety of applications. Heatwork Engineers can also supply the main voltage control units for these elements. Control of heat can be by energy regulators or temperature controllers. Working temperatures of upto 800°C are permissable, but higher temperatures can be achieved using Kanthal wire as alternative element material. Steel connector blocks or twistlock connectors are provided for tail terminations. NOTE :  Extension leads for tails can be provided and are priced per metre length required.

  40 KVA, 50 KVA, 80 KVA, 100 KVA. Transformer / Heat Treatment Units. Provides safe low voltage power of 60 / 65 V and 80 / 85V, to feed flexible heating elements for the purpose of preheating, post heating and postweld heat treatment. The units are housed in rigid steel frame of heavy gauge sheet steel wheeled cabinet for mobility, well balanced and quality powder coated finish. Insulated to Class "H" standards, the windings are air natural cooled. The unit can be fitted with either 3 way or 6 way contractorised control modules. Energy regulators are fitted as a standard feature for control of Heat Treatment cycle. Miniature size temperature controllers can also be fitted on request A 50 KVA unit can feed eighteen 60V, 2.7 KW or fifteen 65 V, 3.25 KW heating elements. Complete Heat Treatment units housing temperature recorder and micro processor based programmer can be supplied on request Standard Features :  Primary input supply 3 phase 380V / 415V / 440V Neon indicators for each channel Three metres 4 core input cable Four lifting eye bolts 230V and 115V auxiliary supply for lighting or operating power tools.    Optional Features :  Transformer rating of either 40 KVA, 50 KVA, 80 KVA or 100 KVA. Contactorised 3 or 6 way control module.   Control modules can be supplied with either energy regulators only, or energy regulators and temperature controllers.   Full automatic programmers can be connected to the unit for fully automatic heat treatment profiles..                      

  Gas / Oil fired high velocity portable combusion system are used for Post weld Heat Treatment, Refractory Dryouts and curing. The unit has a maximum output of 8 x 10 BTU / HR. Having an exceptional turn down characteristic (air / fuel ratio) It can provide high volume low temperature conditions that are essential at the beginning of an operational cycle. The unit is designed for manual operation. Automatic control can also be provided. The system can also be used in the construction of an On-site temporary furnace where permanent furnaces are not available for carrying out Post-weld Heat Treatment of odd size vessels and fabrications.

Similar in construction to Ceramic Flexible Mat Heaters with additional ceramic fibre insulation encased in stainless steel mesh and protected by a stainless steel backing plate. Particularly suitable for preheating pipework, vessels, and welded fabrications having either longitudinal or circumferential seams.   Robust and operate from a welding machine or Heat Treatment unit. Gives protection to the Ceramic Beads from weld splatter. Can be magnetically attached to work piece for fast application by use of two magnetic clamps.    

Thermocouple welding unit provides a positive attachment of the thermocouple wire to the work piece surface by capacitance discharge. The operation is fast and reliable, giving accurate temperaure readings under conditions where other methods of attachment have registered error of upto 50°C at 650°C. Lightweight and portable, it is supplied complete with rechargeable battery, housed within the carrying case. The unit can be charged from 230V supply and is ideal for working in areas with restricted access.

  Heat Treatment Furnaces for Postweld Heat Treatment of Large Pressure vessels/Normalising or Solution Annealing of Dish Ends by Fuel Fired Oil/Gas Burner Systems or Electric Heated

  Ceramic Flexible Heaters are manufactured from high grade materials and have a working temperature capability of 1050°C. They can be powered from Power source/Heat Treatment units or Welding machines. Heating element consists of multi strand Nickel Chrome element wire, electrically insulated by interlocking sintered alumina beads, providing a flexible high heat transfer-Mat, complete with twistlock connectors. Heaters are rated at low voltage of 30V, 32.5V, 40V, 42.5V, 60V, 65V, 80V and 85V., and available in wide range of sizes. Non-standard voltages of 220V & 240V are also available. Other sizes and rating can be supplied on request. Heaters are rated at 45Amps for 30V, 60V and 80V and 50 Amps for 32.5V, 65V and 85V.

      Finger elements are well established pre and post weld heaters, suitable to be powered from AD/DC welding machines. Ruggedly constructed, they require minimal maintainence capable of withstanding considerable On-Site maltreatment. The element consists of two solid drawn Nickel Chrome element wires passed through sintered alumina beads providing electrical insulation and high heat transfer capability. Standard element maximum working temperature is 1050°C each finger being rated at 120 Amps at 1.3 Volts. For heat treatment of stainless steel, special solid drawn Kanthal wire is required to give a maximum operating temperature of 1250°C. Steel connector blocks or twistlock connectors are provided for end termination. NOTE :  The stock number identify the size (Number of fingers) of each element.

The PID Stress Relief Programmer Controller is used for controlling the rate of heating, soaking and rate of cooling during stress relieving operation. It can be used in conjunction with the power source unit or other contactorised units. Features Control Types PID with Pre-tune and RaPID fuzzy logic, or Manual Tuning. Heat or Heat / Cool, applications Auto/Manual Selectable from front panel, with bumpless transfer Output Configuration Up to 3 total. Max 2 for control (Heat & Cool), max 2 for Alarms, max 1 for retransmit PV or SP Alarm 1 & 2 Types Process high, process low, setpoint deviation and band Human Interface 4 buttons, 10mm & 8mm high LED’s, plus run-hold, tune, event & profile / control status LED’s PC Configuration Off - line configuration & profile editing via config socket (comms option not required)     Profiles Number of Programs 4, each with 16 free-form segments (Ramp/Dwell/End). Max segment length 99 hours 59 minutes Delayed Start Max 99 hours 59mins delay from initiation to program start Guaranteed Soak Holds program if PV is outside of specified hold band during dwell segments. Program Cycles 1 to 9999 or infinite (continuously re-starts program at end) Ramp Rate Definition Either ramp rate, or time to final setpoint Power Loss Recovery Hot (continue profile from point of power fail) or Cold (end profile and return to controller mode)     Input Thermocouple J, K, R, S, T, B, L, & N. RTD 3 Wire PT100, 50W per lead maximum (balanced) DC Linear 0-20/4-20mA, 0-50/10-50mV, 0-5/1-5/0-10/2-10V. Scaleable -1999 to 9999, dec point available Impedance >100MΩ for Thermocouple and mV ranges, 47KW for V ranges and 4.7W for mA ranges Accuracy +/- 0.25% of input span +/- 1 LSD (T/C CJC better than 0.7°C) Sampling 4 per second, 14 bit resolution approximately Sensor Break Detection 500, 000 operations DC for SSR Drive capability >4.2V DC in 1KΩ (10V 500Ω version available) DC Control/Retransmit 0-20/4-20mA into 500Ω max, 0-10/0-5V into 500Ω min. Control OP +/- 0.5%, Retransmit +/- 0.25% Solid State (Triac) 0.01 to 1 Amp AC 20 to 280V, 47 to 63Hz Remote Run-Hold Volt free or TTL input (Hold = -0.6 to 0.8V or contact open, Run = 2 to 24V or contact close) Communications 2 Wire RS485, 1200 to 9600 Baud, Modbus     Operating & Environmental Temperature & RH 0 to 55°C (-20 to 80°C storage), 20% to 95%RH non-condensing Power Supply 90 to 264V 50/60Hz (optional 20 to 55V AC/22 to 65V DC), approx 4 Watts Front Panel Protection IEC IP66 (Behind panel protection is IP20) Approvals and Certification CE, UL & Ulc