Custom-Built 660 MW Steam Turbine Diaphragm with Heat-Resistant Alloy Steel for High Efficiency
Our custom-engineered 660 MW steam turbine diaphragms are core stationary components for large-capacity thermal power generating units. Installed inside the steam turbine casing, they hold stationary blades, divide pressure stages, guide high-temperature & high-pressure steam flow, and convert steam thermal energy into kinetic energy for rotor work. Precise manufacturing and structural reliability directly determine turbine efficiency, unit output and long-term safe operation.
We deliver fully customized diaphragms tailored for 660 MW turbine parameters. According to unit type, stage pressure, steam temperature, flow requirements and installation dimensions, we complete material selection, structural optimization, stationary blade assembly, welding & precision machining. Solutions cover new-unit manufacturing, old-unit performance retrofitting, and spare-part replacement for overhaul projects.
Adopt heat-resistant alloy steel for diaphragm rings and partitions. Excellent high-temperature strength, creep resistance, oxidation resistance and thermal-fatigue performance. Stable mechanical properties under long-term exposure to high-temperature, high-pressure steam environment of 660 MW units, resisting thermal deformation and material failure.
Custom-fit inner/outer ring dimension, stationary blade profile, nozzle chamber structure, sealing tooth layout and mounting interface. Strictly follow original drawings for replacement parts; we also provide optimized redesign for efficiency upgrade. High-precision blade assembling and circumferential sealing processing minimize steam leakage loss, improve stage efficiency and reduce heat consumption of the whole unit.
Adopt mature welding procedures for diaphragm sub-assemblies. Complete stress-relieving heat treatment after welding to eliminate residual welding stress. Effectively prevent deformation during long-time variable-load operation, guarantee stable radial & axial clearances between diaphragm and rotor.
Each diaphragm undergoes non-destructive testing (NDT), dimensional accuracy inspection, profile detection, and assembly clearance verification. Compliant with thermal power equipment industry standards. Low leakage, stable stage performance, extend service cycle and lower unplanned shutdown & maintenance costs.
Specially designed for 660 MW sub-critical / super-critical steam turbine units. Widely used for new thermal power plant construction, unit efficiency retrofitting, overhaul spare-part supply and defect-diaphragm replacement.
Please provide original drawings, stage technical parameters, operating conditions or failed-part reference. Our engineering team will evaluate your requirements and deliver professional technical proposal plus competitive quotation within short lead-time.
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