Home > Welded Pipes > Power & Energy
The power & energy sector operates pipelines that handle high-pressure steam, hot water, superheater/reheater circuits, turbine inlet lines, boiler feed connections, condensate return systems, HRSG pipelines, and auxiliary utility lines. These fluids operate under extreme temperature, pressure, vibration, and cyclic thermal loading, demanding exceptional material reliability.
Welded pipes manufactured to A691 (Chrome-Moly EFW Welded) and A672 (High-Pressure EFW Welded) standards are specifically chosen for power plant and energy sector pipelines. They provide:
These pipes are essential for coal-fired power stations, combined cycle plants (CCPP), HRSG units, biomass plants, solar thermal plants, district heating systems, and industrial energy utilities.
Power generation pipelines are subjected to:
A691/A672 welded pipes must withstand:
✔ Pressure spikes & surges
✔ Thermal fatigue & cyclic loading
✔ High-temperature oxidation
✔ Long-term creep deformation
✔ Vibration & stress concentration
The metallurgical stability of A691 Chrome-Moly and the pressure strength of A672 make them perfect for demanding service environments.
Power plant engineers prefer welded pipes because they offer:
These pipes ensure continuous, safe operation of power generation systems.
A691 / A672 welded pipes are used in:
They form the structural backbone of high-temperature, high-pressure process circuits.
These welded pipes are chosen for their ability to operate safely under the extreme mechanical and thermal loads found in power generation environments.
| System / Line | Typical Media | Purpose in System |
|---|---|---|
| Main Steam Lines | High-pressure superheated steam | Withstand high temp + pressure |
| Reheater / Superheater Lines | Hot reheated steam | Resist thermal fatigue |
| Boiler Piping | Steam & hot water | Prevent creep & oxidation |
| HRSG Piping (CCPP) | Steam circuits | Handle cyclic operation |
| Turbine Inlet Lines | High-pressure steam | Ensure stable flow & reliability |
| Feedwater Lines | High-pressure water | Resist surge & vibration |
| Condensate Return Lines | Condensate at varying temps | Maintain structural stability |
| Auxiliary Steam Piping | Utility steam | Long service reliability |
| District Heating Pipelines | Hot water | Sustain controlled pressure cycles |
Main Steam & Hot Reheat Lines (Critical Power Circuit)
A691 Chrome-Moly welded pipes are used where steam temperatures & pressures are highest.
They provide:
Boiler Piping & Superheater/Reheater Circuits
Used in:
A691/A672 resist oxidation & thermal cycling under elevated temperatures.
HRSG Piping (Combined Cycle Power Plants)
HRSG systems require pipes that handle:
A672 welded pipes deliver stable performance under cyclic operation.
Turbine Inlet Piping
These sections face:
Welded A691 Chrome-Moly ensures stability and integrity.
High-Pressure Feedwater Piping
A672 pipes are preferred for feedwater at high pressure due to:
Condensate Return & Auxiliary Steam Lines
These circuits operate continuously under fluctuating temperatures.
Welded pipes maintain:
District Heating & Industrial Power Utilities
Used for transporting:
A691/A672 ensure reliable long-distance transport with minimal risk of failure.
| Industry | Application |
|---|---|
| Thermal Power Plants | Steam & boiler circuits |
| Combined Cycle Plants | HRSG & turbine lines |
| Biomass Power Units | High-pressure steam |
| Refineries (Captive Power) | Steam/power utilities |
| Petrochemicals | Process energy pipelines |
| District Heating | Hot water distribution |
| Steel & Cement Plants | Captive power piping |
Need A691 / A672 welded pipes for power & energy applications?
✔ High-pressure pipeline supply
✔ Boiler & steam line material support
✔ HRSG & turbine circuit compatibility
✔ Creep & fatigue-resistant solutions
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
Yes — A691 & A672 are widely used in main steam, reheater, and boiler lines.
High-temperature strength + excellent creep resistance.
Feedwater, condensate return, auxiliary steam, and high-pressure water lines.
Yes — they are engineered for cyclic thermal load in HRSG & boiler operations.
Learn how A691 and A672 welded pipes support high-pressure steam, boiler piping, HRSG lines, and industrial energy systems.