Bidding Documents for the Repair Project of the Water-Intake Transformer at the Former Mine of Chongqing Sote Salt & Chemical Co., Ltd. (Second Bidding)

1. Price comparison conditions
This quotation project—repair of the water intake transformer at the former mine site of Chongqing Sote Salt Chemical Co., Ltd.—has been approved by Chongqing Sote Salt Chemical Co., Ltd. The project owner is Chongqing Sote Salt Chemical Co., Ltd., and the project now meets the conditions for competitive bidding. We are hereby inviting quotations for this project.
2. Project Overview
2.1 The mine’s water intake oil-immersed self-cooled transformer, model S9-800 800 kVA/10 kV, was put into operation in 2004. The dielectric loss test of the transformer’s insulating oil has failed to meet the standards. Currently, there is severe oil leakage at the disconnecting switch of the No. 3 salt-making circulating water transformer, posing a serious equipment hazard. After maintenance and servicing, this transformer needs to be replaced with the No. 3 salt-making circulating water transformer that is currently in operation; therefore, it must be sent out for repair and inspection.
2.2 Fault Description: An oil-immersed, self-cooled transformer (model: S9-800/10) is experiencing oil leakage at the high- and low-voltage porcelain bushings due to aging of the insulating gaskets, as well as oil seepage from the tap-changer and gas relay. Additionally, the cooling oil has aged (the dielectric loss test of the transformer’s insulating oil failed), and the breather has also aged. The transformer now needs to be replaced with circulating water for salt production, so it must be sent out for repair.
2.3 Contract Duration: The delivery period shall be determined based on Party A’s production requirements (typically 7–15 days for minor repairs). Party B shall meet Party A’s time requirements; for each day of delay in delivery, a penalty of RMB 2,000 shall be deducted. In case of special circumstances, both parties shall negotiate and communicate accordingly.
2.4 Project Scope: Repair of the original mine water intake transformer (1 unit) for Chongqing Sote Salt & Chemical Co., Ltd.
5. Qualification Requirements for Bidders
5.1 Bidding companies must provide a photocopy of their business license for the inspection and maintenance of power equipment such as transformers.
5.2 Bidders shall provide at least three or more recent performance records of similar transformer maintenance work within the past two years.
5.3 Before signing the contract, Party B shall pay a performance bond equal to 10% of the contract amount (based on the contract value). The bond will be fully refunded upon completion of the contract and receipt of no objections.
8. Bid submission and bid opening time and location.
Deadline: 5:00 PM (Beijing Time), December 8, 2025
Bid opening time: December 9, 2025, 10:00 a.m.
Bid opening location: (Discipline Inspection Office of Chongqing Sote Salt & Chemical Co., Ltd.)
9. Bidding and Contact Information
Please send your qualification and quotation documents to the email address: xiangyuyanhua@163.com.
Contact: Sun Teng
Phone: 15998962084
Address: No. 98 Longxiang Avenue, Wanzhou District, Chongqing City
Supervision phone numbers: 023-61002070 or 13708371911
Company address for this project: No. 98 Longxiang Avenue, Wanzhou District, Chongqing City, Chongqing Sote Salt & Chemical Co., Ltd.

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 those responsible for such unauthorized reproduction.