Minutes of regular quality supervision meeting of a power plant in Hebi, Henan
1、 Report of each construction unit: construction items of this month: 2, 3, 4 and 5 # plate girders of # 5 boiler are in place, and the columns of the third floor of row K0 have been installed; 120 rows of secondary and tertiary tube group assemblies of low-temperature reheater on heating surface; The installation of air preheater module is completed; Cold air secondary air duct configuration; Hot secondary air duct deposit; Boiler ladder platform installation and steel frame node anti-corrosion painting. 1) Quantity of subdivisional works, divisional works and unit works completed in this month: temporarily unavailable 2) Quality activities in this month: quality inspection was organized twice this month, a quality notice was issued, and economic punishment was given to the team that did not comply with the requirements. On June 6, the three-level acceptance of the installation of the central cylinder of two air preheaters was completed, and the conditions for hoisting modular compartments were met. On June 13, the third level acceptance of the second layer of K0 row steel frame was completed, and the lifting conditions of the third layer steel frame were met. 3) QC group activities: Since the installation work has just started, most professionals have not been in place, so there is no QC group activities. 4) Achievements and problems in quality this month: 120 rows of secondary and tertiary tube assemblies of low-temperature reheater are assembled, 1600 weld junctions are welded, and the qualification rate is 98%. 5) Key points of quality control in the next month: according to the construction progress, the quality inspection station supervises and inspects the steel frame before bearing, the heating surface assembly and hoisting, the installation of the steel frame delay parts, the six lane preparation and storage, the ladder platform installation, the installation of the main plant steel framework, and the construction preparation of the steam turbine professional condenser The supervision unit summarized the construction quality of this month and proposed that the civil engineering part 1) The steel structure hoisting quality of 5 # main power house was stable, and the weld quality was improved. The first floor frame weld flaw detection was 17.60m, and the first pass rate was 99%. 2) The final tightening pre tension of high-strength bolts meets the design requirements. 3) The quality and appearance of the welding seam of the steel structure of the 5 # main power house have been improved, but some of the welding seams are still poorly formed, and the geometric dimensions do not meet the requirements of the inspection standard, which requires further control and improvement. Installation part 1) The installation quality of 5 # boiler steel frame is stable, and the spot check and pretension of high-strength bolts meet the design requirements. 2) The appearance process of six pass preparation is stable, and the control level of welding deformation is steadily improved. 3) The low temperature recombination wind prevention measures have been put in place, but the spectral inspection is not in place, and there is a phenomenon of missing inspection. The supervision department has repeatedly verbally asked for no effect, so we should strengthen management and actively carry out spectral inspection. 4) On June 19, the girder was hoisted, and the initial tightening was carried out without the acceptance of the supervisor. The rectification has been carried out according to the notice of the supervisor. We hope that similar situations will not occur again in the future. 5) The steel frame of the fourth floor was hoisted without acceptance. At that time, 30% of the important nodes were not perfect, and some nodes lacked node plates. In order to ensure the project quality and the safety and stability of the structure, we hope that similar events will not occur again in the future. 6) The girder was not cleaned thoroughly before lifting, which caused the stiffening plate of the girder to be stuck and the overlapping surface could not be tightly combined. 7) Pay close attention to the establishment of primary and secondary warehouses for butt welding materials. 4、 Requirements of the Supervision Department V. Requirements of the Director 9 pages