Key Boiler Pipes Used for Ultra Supercritical Power Plants
SA213-T91, SA335-P91, SA213-T92, SA335-P92
High-parameter, large-capacity ultra-supercritical thermal power
plant is the best choice for thermal power plant. It is the best
way to adjust power supply structure, protect environment, and save
primary energy. Boiler is the equipment of thermal power plant.
With the increase of boiler steam parameters and single unit
capacity, more stringent requirements are imposed on boiler pipes.
Four steam pipelines are the key components of power plant,
including high temperature reheat steam pipeline (hot section), low
temperature reheat steam pipeline (cold section) and high pressure
water supply pipeline. The mechanical properties and high
temperature resistant properties of the pipe material will directly
influence the safety and reliability of power plant.
SA213-T91 material can be used for superheater and reheater tubes
with wall temperature ≤ 600°C. SA335-P91 material can be used for
header and steam pipes with wall temperature ≤ 600°C.
While it was discovered that when the temperature exceeds 600°C,
T91 and P91 cannot meet the requirements of long term safe
operation. In the unit with heavy peaking tasks, the fatigue
failure of pipe is also a big problem. When the pipe is operated at
high temperature for a long time, the accumulation of damage before
the occurrence of a large number of creeping cavities becomes a
more important problem. While new steel grades have been developed
and used in large boiler high temperature parts, such as SA213-T92,
XOOS is professional supplier of seamless high & medium
pressure boiler pipes, with OD up to 56'' 1422mm and wall thickness
up to 140mm. XOOS is your trusted partner for large OD & heavy
wall thickness seamless pipes.