Mastodon Power plant and calculations: Constructional materials & welding electrodes used in power plant

Constructional materials & welding electrodes used in power plant

What are the various materials used in power plants construction???
1-Low Carbon Steel IS 2062, IS 1239: For structural steels like plates, angles, channels, beams, platform, walkways & LP steam lines etc.

2-High Carbon Steel SA 106 Gr. B/C, SA210 Gr, B/C, SA 516 Gr. 70: For Boiler pressure parts like water wall panels, headers, economiser coils, down comers, feed water lines, steam drum etc.
3-Alloy Steel SA 213 Gr. T11, T22, T91 and SA 335 P11/P22: Super heater coils and main steam pipe lines.
4-Cast Iron: Travelling grate materials, pulley, coupling etc.
5-Copper: Air conditioning cooling lines.
6-Brass: Surface condenser and oil cooler tubes.
7-Stain Less Steel SS 304, 316, 410 etc: Ejector tubes, surface condenser/oil cooler tubes, control valve stems & valve trim materials
8-Plastics: PVC pipe lines, valves, tanks etc.
9-Steam Turbine
  • ESV: Cast alloy steel
  • HP Casing: Cast alloy steel
  • LP Casing: Carbon steel
  • Rotor: Forged chromium, molybdenum and vanadium alloy steel
  • Blades: Alloy steel
  • Bearings: Liner Babbitt or white metals
  • Labyrinth: Phosphorous, lead and aluminum

What welding electrodes are generally used in power plants various welding works???


Sl No.
Particular Material and Grade
Type of Welding
Welding Electrodes Used
Application
1
Low carbon steel IS 2062/1239
Arc
E 6013
General welding works like structures, non IBR pipe lines plates etc.
2
Carbon steels SA 106 Gr.B/C, SA 210 Gr.A/C, SA 516 Gr.70, SA 234, etc.
TIG
Arc
ER 70 S2
E 7018
Boiler water wall panels, economizer coils, evaporator headers, process steam lines etc.
3
Low alloy steel SA 213/SA-335 Gr.T11/P11
TIG
Arc
ER 80S B2
E 8018 B2
Primary super heater coils, headers, soot blower lines etc.
4
High alloy steel SA 213/SA-335 Gr.T22/P22 and T91/P91
TIG
Arc
ER 90S B3/90S B9
E 9018 B3

Secondary and radiant super heater coils, main steam line etc.

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