Bidding Documents for Overhaul of Thermal Power Units No. 2 and No. 3 Steam Turbines

1. Price comparison conditions
This quotation project—maintenance of Turbines No. 2 and No. 3 at the thermoelectric plant of Chongqing Suote Salt & Chemical Co., Ltd.—has been approved by Chongqing Suote Salt & Chemical Co., Ltd. The project owner is Chongqing Suote Salt & Chemical Co., Ltd., and the project now meets the conditions for competitive bidding. We are hereby inviting quotations and conducting a competitive bidding process for this project.
2. Project Overview and Price Comparison Scope
2.1 Project Location: Within the premises of Chongqing Sote Salt & Chemical Co., Ltd.
2.2 Project Scope: Overhaul of Steam Turbines No. 2 and No. 3 at the plant area of Chongqing Sote Salt Chemical Co., Ltd.
2# Steam Turbine Overhaul and Maintenance Project:
1. Disassembly and inspection of the automatic main steam valve.
2. During the inspection of the large cover, the intermediate adjustment mechanism and the rotating baffle were found to be stuck.
3. Remove the large cover and inspect, repair, and seal any steam leaks on the cylinder head.
4. Remove the large cover and replace the front and rear steam seals.
5. Check the high-profile valve core.
6. Inspect and adjust the oil system of the front bearing housing.
3# Turbine Overhaul Project:
1. Disassembly and inspection of the automatic main steam valve.
2. Inspection of high-pressure valve spools; replacement of the No. 2 high-pressure valve spool; repair of self-sealing leaks in the No. 4 high-pressure valve.
3. Open the front bearing housing to inspect the emergency governor.
2.3 Construction Period: The maintenance work shall be completed within 10 days starting from the moment the steam turbine is shut down and cooled, ensuring that it meets the conditions for startup. The specific timing will be subject to notification by Party A.
2.4 Project Scope: Overhaul of Steam Turbines No. 2 and No. 3 at the plant site of Chongqing Sote Salt & Chemical Co., Ltd.: See Technical Requirements for details.
2.5 The bid must include the diagnostic plan for Unit #2 and a feasibility plan for the maintenance work. Bidding companies are requested to carefully review the maintenance items for this project.
3. Inspection and Acceptance Criteria
3.1 Disassembly and assembly of the tripod and high-speed valve, along with joint treatment, ensure that the high-speed valve and automatic main steam valve close tightly and can be fully opened and fully closed.
3.2 Valve disc lift check, nozzle inspection, and shaping.
3.3 Visual inspection reveals no laps, weld bumps, or porosity.
3.4 The cylinder flange joints shall be fully engaged and free of dirt and debris. For the high-pressure cylinder, a 0.03 mm feeler gauge shall not be able to insert; for the medium- and low-pressure cylinders, a 0.05 mm feeler gauge shall not be able to insert. In individual cases where a feeler gauge does manage to insert, its insertion depth shall not exceed one-third of the sealing surface width, and the cylinder’s lateral horizontal deviation shall not exceed 0.02 mm/m.
3.5 Visual inspection of cylinder bolts; the tightening sequence of the bolts is correct.
3.6 The slide pin slides smoothly within the slide groove without any jamming or binding. The slide pin and slide groove are securely fastened to the cylinder, baseplate, and bearing, and the clearances in all directions meet the specified standards.
3.7 The partition shall not protrude beyond the horizontal centerline of the cylinder, and the steam outlet side of the partition must be completely sealed against the cylinder’s mating surface.
3.8 Before joining the cylinders, the inside of each cylinder must be thoroughly cleaned and free of any debris.
4. Quotation deadline
Deadline: February 11, 2025, 10:00 (Beijing Time)
5. Contact Information
Price Comparison Person: Chongqing Sote Salt & Chemical Co., Ltd.
Address: No. 98 Longxiang Avenue, Wanzhou District, Chongqing City
Contact: Sun Tongying
Phone: 13517321268

Disclaimer: The official channel for our company’s announcement of this tender is the website of Chongqing Xiangyu Salt & Chemical Co., Ltd.: http://www.cqxyyh.com. Apart from this, our company has not published any tender information on any other websites, forums, or media platforms. Any tender information reproduced from other sources and attributed to our company as the tendering entity is unauthorized and therefore invalid. We reserve the right to pursue legal action against such unauthorized reproductions.