Chugoku Bend

[Link entfernt] 90 GB DataBase

[Link entfernt]

CONTENTS

01. COMPANY AND BUSINESS CONTEXT

02. FILE VOLUME AND DISTRIBUTION

03. MAIN DATA AREAS AND SENSITIVITY

04. EMAIL AND LINKS BETWEEN DOCUMENTS

05. ARCHIVES AND NESTED PROJECT MATERIALS

06. INTERNAL ENGINEERING DOCUMENTATION CATALOG

07. BEND'S ENGINEERING KNOWLEDGE BASE AND PROPRIETARY DEVELOPMENTS

08. FABRIC EXPANSION JOINTS: LAYERS, DESIGNS, AND TEMPERATURE CONDITIONS

09. DESIGN: GEOMETRY, MOVEMENT, AND THERMAL PROTECTION

10. LEAK TIGHTNESS, JOINTS, AND DOCUMENTED TESTS

11. MANUFACTURING CHANGES AND DEVELOPMENTS IN 2024-2026

12. CALCULATION SYSTEM: METHOD SELECTION, VERSIONS, AND ENGINEERING RESULTS

13. METALLIC MATERIALS: SELECTION, HEAT TREATMENT, AND CERTIFICATES

14. WELDING, INSPECTION, AND MANUFACTURING FEEDBACK

15. CAD, CALCULATION PREPARATION, AND TRANSFER OF ENGINEERING KNOWLEDGE

16. INTERNAL INSTALLATION METHOD AND PATENT CONTEXT

17. CUSTOMER PROJECTS AND DOSSIER CONTENTS

18. FUKUSHIMA DAINI: THREE EXPANSION JOINTS IN THE MAIN EXHAUST AIR DUCT

19. SHIKA: EXTERNAL LEAK REPORT AND A SEPARATE INSTALLATION GEOMETRY ERROR

20. KASHIWAZAKI-KARIWA: K-7 EFCVS DESIGN SELECTION AND COATING CHANGE

21. KASHIMA KITA: 2026 DESULFURIZATION DESIGN CHANGE

22. KAWASAKI AND THE T DESIGNATION: CHANGES IN THE CONDITION OF EE00, EE01, AND EE02

23. VIBRATING SCREENS EX-89, EX-90, AND EX-97: A LONG HISTORY OF DESIGN CHANGES

24. BIOMASS AND DUST-LADEN DUCTS: RECURRING DAMAGE AND INSTALLATION GEOMETRY

25. SHIN-ONODA: LEAKS, INSTALLATION DAMAGE, AND POSITIVE REPAIR VERIFICATION

26. HYOGO PULP: COMPLETED REPAIRS WITH AN EXPLICIT WARNING OF LIMITED EFFECTIVENESS

27. NOSHIRO, ISOGO, AND FUKUYAMA: 2025 INSPECTIONS AND THE ACTUAL SCOPE OF REPAIRS

28. GOBO AND NANAO-OTA: COMPLETED WORK AND TEST RECORDS FROM 2025–2026

29. TOYAMA AND MITSUBISHI CHEMICAL: 2026 REPAIR DOCUMENTS

30. LARGE EXPANSION JOINTS E-19 AND E-20 AND DESULFURIZATION REPAIRS

31. NAKOSO: CORROSION, DEFORMATION, AND LIMITS ON REPAIRABILITY

32. TOMATOH-ATSUMA AND HIRONO: REPAIR REQUESTS AND DIFFERENT INSPECTION DATES

33. MITSUI CHEMICALS OSAKA: ACTUAL AGING AND POST-INSTALLATION CONDITION

34. WAKAYAMA AND TAKASAGO: INSTALLATION WORK WITH COMPLETED INSPECTION RESULTS

35. COMPLAINTS AND MANUFACTURING ERRORS IN 2023–2025

36. TEIJIN IWAKUNI AND SHIN-YOKOHAMA DAMPER DRAWINGS: CONSTRUCTION AND DISCREPANCIES BETWEEN SHEETS

37. DAMPER FAILURES AND CUSTOMER TECHNICAL INQUIRIES

38. HISTORICAL INVESTIGATIONS: ERRORS IN STRENGTH, GEOMETRY AND MATERIALS

39. MA600: INVESTIGATION OF THE FAILURE CAUSE WITHOUT A FINAL CONCLUSION

40. SAKAIDE / IHI: QUOTATION, CALCULATION AND PRODUCTION RECORDS FOR BCM03666

41. ARCHIVED DRAWING SETS: DIMENSIONS, MATERIALS AND DISTINCT REVISIONS

42. ENEOS: RECENT QUOTATION OPTIONS AND APPLICATION OF THE TECHNOLOGY ON SITE

43. WORKPLACE SAFETY AND MEASUREMENT CONTROL

44. FINANCIAL RESULTS, LOSS-MAKING ORDERS, AND BUDGETS

45. SAKANISHI AND KOGA: COMMERCIAL TERMS AND INTEGRATION

46. ORDER COSTING, PRICE LISTS, AND PROCUREMENT TERMS

47. GOVERNANCE, INTERNAL AUDITS, AND BUSINESS CONTINUITY

48. PERSONNEL, ANONYMOUS SURVEYS, AND WORKING HOURS

49. PLANNING ON-SITE WORK, RESOURCES, AND RESPONSIBILITIES

50. INTERNAL CODE, COST ESTIMATING SYSTEM, AND DOCUMENT MANAGEMENT

51. DIGITAL TOOLS AND PROCUREMENT PROPOSALS

52. PUBLIC STATEMENTS, VIOLATIONS, AND COMPARISON WITH DOCUMENTS

53. OVERALL ASSESSMENT

01. COMPANY AND BUSINESS CONTEXT

CHUGOKU BEND designs and manufactures metallic and nonmetallic expansion joints and steel dampers. Expansion joints accommodate thermal movement in piping and ducts, deformation, and vibration; dampers shut off flow or regulate its rate. The company offers design for specific customer conditions, manufacturing, inspection, replacement, and repair. Its head office is in Hiroshima; manufacturing sites are in Hiroshima and Koga, with a separate office in Tokyo.

Sources: CHUGOKU BEND's official website, the “Company,” “Metallic Expansion Joints,” “Nonmetallic Expansion Joints,” and “Steel Dampers” sections: [Link entfernt] [Link entfernt] [Link entfernt] [Link entfernt]

The internal documents cover work on a product from the customer's inquiry through servicing: site conditions, selection of design and materials, calculations, drawings and their revisions, cost estimates, manufacturing, installation, and inspection. The main areas are metallic and fabric expansion joints, dampers, flue gas ducts, and air ducts for power stations and industrial facilities.

Additional materials concern the transfer of Sakanishi Jabara's manufacturing operations and the establishment of the Koga plant, financial results, procurement, personnel administration, site visit scheduling, and internal digital tools.

Sources: \技術部\FB\設計\設計基準\パソコン用\[Link entfernt]; design and verification documents in \技術部\FB\設計\チェック資料; Sakanishi and Koga materials in \kiyosada@bend.[Link entfernt]\ドキュメント\資料\技術部関連\古賀工場; board materials in \kiyosada@bend.[Link entfernt]\Microsoft Copilot Chat ファイル\7月度 [Link entfernt].

02. FILE VOLUME AND DISTRIBUTION

The source collection contains 4,050 files and 582 subfolders; including the root folder, there are 583 directories. The total volume is 90.53 GB. Four PST email archives occupy 86.50 GB; the other files occupy approximately 4.03 GB. File sizes use the conversion 1 GB = 1,024 MB.

kiyosada@bend.[Link entfernt]: 3,864 files, 90.10 GB.

中国ベンド株式会社: 46 files, 37.65 MB.

広島工場: 9 files, 1.93 MB.

技術部: 131 files, 401.30 MB.

PDF and DocuWorks account for the largest share of the documentation: 1,711 files totaling approximately 2.61 GB. This group includes 644 PDFs totaling approximately 2.03 GB and 1,067 XDW files totaling 594.32 MB. These contain drawings, inspection reports, manufacturing instructions, training materials, certificates, administrative documents, and email attachments.

Microsoft Office documents and spreadsheets comprise 411 files totaling 172.37 MB. They include 173 XLSX, 66 XLSM, 20 XLS, 94 DOCX, 45 DOC, and 13 PPTX files. The spreadsheets contain estimates, budget models, production records, schedules, individual work time records, and calculation tools; the text documents contain minutes, meeting transcripts, instructions, and technical reference collections.

Raster images occupy 654.40 MB across 577 files. A substantial share of the engineering content is stored as scans and photographs within PDFs, XDW files, and image files. Standalone DWG, DXF, and SVG files comprise four files totaling 4.48 MB; additional DWG files are inside archives. The number of standalone CAD files therefore does not characterize the full volume of drawing documentation.

Twenty-four HTML files occupy 325.25 MB. They include engineering collections with embedded text and scans, a cost estimating system, and work time tracking applications. Four TypeScript files relate to personnel administration automation.

Sources: E:\[Link entfernt]; the kiyosada@bend.[Link entfernt], 中国ベンド株式会社, 広島工場, and 技術部 subfolders; file composition and sizes in Bend_File_Inventory_20261006.csv and Bend_Recursive_File_Map_20261008.xlsx.

02.1. Large Files Outside the Email Archives

[Link entfernt] - 364.57 MB. The largest individual PDF in the collection.

CPC岩国総合技術センター_展示商談会_20250116.pdf - 144.01 MB.

坂西ジャバラ_事業DD_202309.pdf - 132.56 MB. Preliminary due diligence on Sakanishi Jabara: design organization, assets, transfer terms, and a business valuation model.

[Link entfernt] - 62.13 MB. A collection of rubber technology materials, including external technical documents.

MA600,[Link entfernt] - 60.90 MB. Correspondence on nickel alloys, certificates, heat treatment, and investigation of bellows damage.

坂西ジャバラの買収検討について【事業譲渡契約の締結】_20231221.pdf - 58.80 MB. Draft business transfer terms and technical appendices.

坂西ジャバラ買取に伴う体制・技術移転・経営統合作業について_20240422.pdf - 58.34 MB. Organization of the transfer, training, and manufacturing integration.

[Link entfernt], desktop version - 56.27 MB. A fabric expansion joint design manual with designs, calculation rules, and technical communications.

[Link entfernt] - 49.50 MB. A collection of material properties, supplier documents, and individual investigation results.

Source of sizes: Bend_File_Inventory_20261006.csv. The PDF [Link entfernt] is in \kiyosada@bend.[Link entfernt]\Microsoft Copilot Chat ファイル; CPC岩国総合技術センター_展示商談会_20250116.pdf is in \kiyosada@bend.[Link entfernt]\ドキュメント\資料\CPC中電Gr関連. The Sakanishi materials are in \kiyosada@bend.[Link entfernt]\ドキュメント\資料\技術部関連\古賀工場; the three HTML collections are in \技術部\FB\設計\設計基準\パソコン用; MA600,[Link entfernt] is in \kiyosada@bend.[Link entfernt]\Fuji Xerox\DocuWorks\DWFolders\ユーザーフォルダ\資料\MA625.

03. MAIN DATA AREAS AND SENSITIVITY

03.1. Engineering Knowledge and Project Files

The technical core includes BEND FLEX fabric layer configurations, standard designs, design standards, calculation forms, manufacturing notices, and tests. Customer project files supplement these with the geometry of specific assemblies, operating conditions, drawings, inspections, and repair documents. The content allows design decisions to be compared with product changes and servicing results.

Internal knowledge is also identified by explicit access restrictions: the section on F-series layer configurations is intended for internal use and must not be distributed outside the company. The working knowledge base also includes a confidential Hitachi-GE report on Shika. BEND's own standards, customer documents, and public supplier materials have different origins.

Sources: the manual \技術部\FB\設計\設計基準\パソコン用\[Link entfernt]; the collection \技術部\FB\設計\問合窓口\設計基準書_ナレッジ.docx, section 1-2; Hitachi-GE report HDE-15-0018 Rev.2 in \技術部\FB\設計\設計基準\パソコン用\[Link entfernt], pages 150-155; project files and repair reports in sections 18-42.

03.2. Commercial and Management Information

Cost estimates disclose material prices, labor allowances, markups, and cost breakdowns. Order registers contain revenue and losses on individual jobs; management materials contain company performance indicators, budgets, and allocations of shared expenses. The Sakanishi documents include a proposed business transfer price, valuation assumptions, and training terms. The commercial sensitivity of these materials lies in specific prices, costs, and negotiating terms.

Sources: \kiyosada@bend.[Link entfernt]\[Link entfernt]; \kiyosada@bend.[Link entfernt]\Microsoft Copilot Chat ファイル\7月度 [Link entfernt]; \技術部\FB\見積関係\FB見積システム\[Link entfernt]; contractual and valuation materials in \kiyosada@bend.[Link entfernt]\ドキュメント\資料\技術部関連\古賀工場.

03.3. Personal Data and Internal Tools

Personnel materials contain work time, business travel, leave, sickness records, individual evaluations, and a candidate file with contact and biographical details. Anonymous employee surveys are stored separately.

The source code of internal time tracking applications comprises four TypeScript scripts and two HTML applications. The HTML cost estimating system contains calculation logic, price reference tables, and registers. These programs reveal how internal processes operate; their purpose differs from the engineering development of the expansion joints themselves.

Sources: \技術部\勤怠管理\技術部_勤務時間表_2026年.xlsx; individual workbooks, scripts, and applications in \中国ベンド株式会社\勤怠管理; the candidate file in \kiyosada@bend.[Link entfernt]\Microsoft Copilot Chat ファイル; surveys in \中国ベンド株式会社; \技術部\FB\見積関係\FB見積システム\[Link entfernt].

04. EMAIL AND LINKS BETWEEN DOCUMENTS

The two largest email archives, kiyosada@bend.[Link entfernt] and kiyosada@bend.[Link entfernt]-N_kiyosada5_10(1).pst, each occupy 41.58 GB. Each contains 109,498 ordinary email messages dated from September 12, 2007, to February 3, 2026, and 46 items of other types, including meeting invitations and Outlook documents. The correspondence in the two archives may overlap; the total number of unique messages across them has not been determined.

The 3dcad@bend.[Link entfernt] archive, totaling 3.35 GB, contains 5,386 ordinary email messages dated from September 12, 2007, to August 23, 2022, one nondelivery notification, and 731 contact items. Contact records may refer to people or organizations.

The fourth PST, dust\Outlook データ ファイル - [Link entfernt], occupies 0.26 MB.

The correspondence links technical reports to production assignments, drawings, estimates, and customer responses. For example, the Nippon Steel Oita thread includes a damage notification, a technical report, a new drawing, a manufacturing request, and discussion of further improvements. In the Koga materials, emails clarify which cost allocation version replaced the previous one. In the internal audit documents, attachments contain the results of corrective action verification and subsequent revisions of the quality manual.

The correspondence preserves different stages of an order: inquiry, estimate, drawing change, manufacturing, and completed work. The email date and attachment content distinguish versions even when the filename is identical.

Sources: four PST files in \kiyosada@bend.[Link entfernt]\ドキュメント\Outlook ファイル, with the small archive in the dust subfolder; sizes in Bend_File_Inventory_20261006.csv. Emails on Koga expenses dated May 20, 2025, internal audit results dated October 14, 2025, and Nippon Steel Oita correspondence from September-October 2025 are in kiyosada@bend.[Link entfernt].

05. ARCHIVES AND NESTED PROJECT MATERIALS

The source files include seven archive packages totaling 23.14 MB: two ZIP files and five DocuWorks XCM packages. Together with nested contents, they form 47 archive containers: seven outer containers and 40 inner containers. They hold 1,180 internal files: 957 at the first level and 223 at deeper levels. The maximum depth is three levels. Internal files are counted separately from the 4,050 source files.

The project ZIP for Unit 1 of Kashima Kita Power Station occupies 19.82 MB and contains 42 files. These include 13 PDFs, seven XDW files, three XLS files, one XLSX file, two XLSM files, two DWG files, one DXF file, and supporting materials. A single package brings together drawings, cost estimates, checking comments, design versions, and calculation tools. These documents concern a specific flue gas duct job and allow the design to be compared with the commercial terms.

The IJCAD package occupies 2.56 MB. Its first level contains 875 files totaling 6.99 MB, including 103 DWG, 690 PNG, 21 BMP, and four DLL files. Four internal CUIX packages contain another 154 files. The full IJCAD package contains 1,029 internal files. The CAD library includes interface settings and graphical resources.

Five XCM packages occupy approximately 0.76 MB and contain 109 internal files, including nested ZIP files. They relate to DocuWorks settings and extensions.

An email dated September 11, 2025, concerning Sakaide Power Station contains a separate ZIP attachment totaling 1.37 MB with one PDF and two JPG files. It concerns a specific technical case and is counted separately from the seven packages in the source folder.

Sources: \技術部\FB\見積関係\チェック資料\20260220_FB_鹿島北共同_1号排脱煙道用.zip; \kiyosada@bend.[Link entfernt]\IJCAD 2025 STD JPN (64bit) (Subscription).zip; dwimport_backupdata.xcm packages in \kiyosada@bend.[Link entfernt]\Fuji Xerox\DocuWorks\dwcustomize and \kiyosada@bend.[Link entfernt]\Fuji Xerox\DocuWorks\DWFolders\dwcustomize; \kiyosada@bend.[Link entfernt]\Fuji Xerox\DocuWorks\設定Backup\20260328_093752_DSVS_DT5VT4_DL3.xcm; \kiyosada@bend.[Link entfernt]\ドキュメント\Outlook ファイル\kiyosada@bend.[Link entfernt], email dated September 11, 2025, attachment [Link entfernt].

06. INTERNAL ENGINEERING DOCUMENTATION CATALOG

The ファブリック_フォルダ整理台帳.xlsx workbook contains a catalog of the network location \\File\技術部\伸縮継手\ファブリック: 35,154 file records and 1,522 folders. The largest catalog categories are design standards, nuclear ventilation materials, and technical materials. The catalog describes the organization of engineering knowledge in a separate network folder; its 35,154 records are not additional files in the source collection of 4,050 files.

The catalog links BEND FLEX standards, materials on fabric layer configurations and rubber technologies, design calculations, instructions, and technical communications by area of work. This structure shows how the company organizes access to accumulated technical materials and separates general standards, nuclear ventilation documentation, and specialized developments.

Source: \技術部\FB\ファブリック_フォルダ整理台帳.xlsx, worksheets ファイル一覧 and フォルダ構成.

07. BEND'S ENGINEERING KNOWLEDGE BASE AND PROPRIETARY DEVELOPMENTS

BEND's own engineering documents connect standard cross sections, geometric constraints, calculation forms, and manufacturing solutions. They cover material selection, strength and movements, manufacturing, joining of components, installation, and servicing.

The technical department's internal manual bears the cover date “2026-09.” It contains 92 articles and 743 technical entries, including repeated communications. Its appendices contain 681 pages of technical text and scans; separate material and rubber technology collections contain 563 and 617 pages. These collections combine BEND's own documents, correspondence, supplier data sheets, and external studies.

The most substantive proprietary content comprises V, P, and P/V fabric expansion joint designs, BF and CF layer configuration variants, internal standards for flanges and shipping restraints, BEND's calculation methods for circular and rectangular bellows, FX manufacturing notices, responses on specific products, and test programs. External catalogs supplement this system with information on PTFE, glass and aramid fabrics, rubbers, thermal insulation, steels, and nickel alloys.

Section 1-2 of the standards collection, concerning F-series layer configurations, is explicitly designated for internal use and must not be distributed outside the company. A historical technical document catalog dated September 1, 2014, additionally classifies seven materials on bolts, tightening, contact pressure, and axial force as internal. Consultation is required for liner resonance and noise reduction calculations, while the external insulation manual was permitted to be provided to customers.

Source: the \技術部\FB\設計 directory; internal fabric expansion joint design manual [Link entfernt] - 設計基準\パソコン用\[Link entfernt], cover, chapters 1-6, and technical communications; the 設計基準書_ナレッジ.docx collection - 問合窓口\設計基準書_ナレッジ.docx, section 1-2; the catalog “ファブリック製伸縮継手の技術資料と閲覧場所一覧,” September 1, 2014, Rev.0, in embedded chapter 6 of the manual, pages 69-73.

08. FABRIC EXPANSION JOINTS: LAYERS, DESIGNS, AND TEMPERATURE CONDITIONS

08.1. BF-201, BF-201T, and BF-301 Layer Configurations

The standard BF-201 consists of four successive layers: 1.6 mm outer glass fabric with weather-resistant treatment, 1.6 mm heat-resistant glass fabric, 0.3 mm sealing PTFE film, and 1.6 mm inner heat-resistant glass fabric. BF-201T adds a second 0.3 mm PTFE film; the films are separated by glass fabric. BF-301 has a larger glass fabric component: two adjacent 1.6 mm intermediate layers precede the PTFE film and inner glass fabric.

BF-201 and BF-201T differ in the number and placement of sealing films. The standard cross sections specify the layer configuration, but not the coating or adhesive formulation.

The P-type drawings show variants with an inner liner, with pin-mounted insulation, and without these components. P/V has more complex configurations: an inner liner, a dust seal, pins, clamping plates, anchors, and refractory layers. For example, one original variant contains 17 items, including an inner sleeve and a dust seal; another contains 16 items with two thermal insulation zones and a refractory layer.

BF-400 is shown with 0.3 mm PTFE film combined with 10 mm glass felt. The thermal insulation component becomes more complex in the higher-temperature catalog variants BF-500 and BF-600; BF-600 includes ceramic felt and ceramic fabric. These designs protect the sealing layer from direct exposure to the hot flow.

Source: standard cross sections and bills of materials in [Link entfernt] - \技術部\FB\設計\設計基準\パソコン用\[Link entfernt], chapter 4, pages 4, 9-10, 26-27, 32-62, 65-77, 80, and 100; chapter 1, page 15.

08.2